US2152199A - machado - Google Patents

Description

FIE II A March 28, 1939. A. B. MACHADO 2,152,199

CALCULATING MACHINE Original Filed Jan. 23,1953 4 Sheets-Sheet l INVENTOR. Amara/ y .B. lllacfiaao A TTORNEY March 28, 1939. MACHADO 2,152,199

CALCULATI NG MACHINE Original Filed Jan. 23, 1935 4 Sheets-Sheet 2 FIIE E n n M1 INVENTOR. flmhony .B. Mac/Jada A TTORNE Y Fla s- March 28, 1939. A. B. MACHADO CALCULATING MACHINE Original Filed Jan. 23,1933 4 Sheets-Sheet 3 lqnml miwm SN wQ IN V EN TOR. flnfhor B. Mac/mda MW I A TTORNEY W mHrm March 28, 1939. A. B. MACHADO CALCULATING MACHINE Original Filed Jan. 23, 1953 4 Sheets-Sheet 4 Patented Mar. 28, 1939 UNITED STATES PATENT orrlcr.

CALCULATING mcnmn Application January 23, 1933, Serial No. 653,085

Renewed May 29, 1937 6Giaims.

The present invention relates to calculating machines and the like adapted to perform the four cardinal calculations and combinations thereof, and particularly to the type in which a transmission mechanism is adapted to be controlled by a plurality of operation controlling devices to initiate a calculation involving one or more cycles of operation of the machine. The invention is concerned more particularly with means for reducing the force or pressure required to operate any control key or lever by the provision of power operated means for engaging or setting the various control devices to their respective positions.

It is an object of the invention to provide operation control devices which require a comparatively light pressure for movement thereof to operative position.

Another object of the invention is the provision of power operated means for engaging a clutch or transmission mechanism.

Another object of the invention is the provision of power operated means for positioning mechanism to initiate a subtractive operation.

Another object of the invention is the provision of power operated means for restoring the clutch engaging means to inoperative position.

Another object of the invention is the provision of power operated means for restoring the reversin'g control means to normal position.

Another obj ect of the invention is the provision of means whereby a manually operable member is adapted to control one or more'power operated machine controls.

Another object of the invention is the provision of power operated means for locking the selection mechanism during operation of the .machine.

Other objects will progresses.

The machine embodying the present invention is of the general type shown in the patent to Friden, Number 1,643,710, dated September 2'7, 1927, to which reference is hereby made for a disclosure of a complete calculating machine including mechanisms not specifically described herein. It is to be understood, however, that although the invention is shown applied to a machine of the general type disclosed in said patent, it is manifest that the invention is applicable in any machine which is power driven and in which various controlling mechanisms must be set at the beginning of a particular operation.

The invention possesses a plurality of advantageous features, some of which will be set forth appear as the description in full in the following description, and while the preferred construction thereof is shown in the drawings accompanying the description, it is understood that the invention is capable of modification within the scope of the claims.

In the accompanying drawings:

Figure 1 is a longitudinal section taken from the right showing the plus and minus keys and the reversing control mechanism.

Figure 1A is a detail of the reversing control 10 mechanism taken on section line lA-IA of Figure 1.

Figure 2 is a longitudinal section taken from the right showing the multiplier keys and the multiplier control unit.

Figure 3 is a detail plan view of the multiplier key latching slideand the releasing means therefor.

- Figure 4 is a longitudinal section taken from the left disclosing engaging means and the congo trolling means therefor.

Figure 4A is a detail in plan of a portion oi. this mechanism.

Figure 5 is a detail view in elevation of certain mechanisms shown in Figure 4.

Figure 6 is a longitudinal section taken from the right disclosing the numeral keys, the selecting mechanism, and the locking means therefor.

Figure '1 is a schematic plan view of the driving mechanism. g 30 Calculating machines heretofore have been provided with power driven means for controlling the various operations thereof including devices which were settable by movement of various control keys against the tension of springs suilicient- 35 ly strong to restore the mechanism to normal position upon completion of the operation Calculating machines of this type are disclosed in the application of Avery and Lerch No. 405,127, iiled November 6, 1929 and issued as Patent No. 40 2,022,103. In the type of machine where the operation initiating devices positively move the various controlling mechanisms to set position against the tension of springs or such, considerable pressure sometimes amounting to several 45 pounds is required to move said operation initiating devices, which is undesirable in a machine and tiring to the operator.

The present invention provides power operated means for setting the various controlling mecha- 5o nisms to operative position upon manipulation of the respective controlling keys so that the strong springs formerly used to provide for restoration of said mechanisms are eliminated. the controlling keys being provided with very light springs 55 only, so that the pressure required to operate them is materially reduced.-

Difierential mechanism The machine embodying the present invention, shown in the accompanying drawings, is provided with a plurality of banks of numeral keys, one bank of which is shown in Figure 6, the said numeral keys 3| 5 being mounted in a key frame comprising a top plate 3I4 and a strap 3I4A attached thereto. Keys 3I5 are normally held in raised position by springs 3 I 8 bearing against the strap 3I4A and suitable shoulders formed on the' key stem's. Disposed below and in contact with the strap 3I4A is a slide 3II normally held in its forward position by a spring 3I8. Slide 3i! is provided with a plurality of apertures through which the key stems extend. and each key stem is provided with 9. lug 3I5A which, when the key is depressed, causes rearward reciprocation of the slide 3II, and which, on return of the slide, engages thereunder to hold the key in depressed position. The clearance key 3I50 is provided on its face with a longer camming projection which operates upon depression of the clearance key to move the slide rearwardly to release any depressed key.

The selecting bar or lever which is differential- 1y depressed by operation of the different keys is positioned below the key stems and comprises a duplex lever. The main lever 3I I is pivoted at its forward end to a tongue 320 depending from strap 3I4A and is. connected at its free or movable end with a bellcrank 308 pivoted at 309 and provided on its upper end with a rack 30! meshing with a gear integral with actuator selecting element 305. Fulcrumed on a depending bracket near the rearward end of the key section is the secondary lever 3I2, said lever being loosely pivoted to the main lever 3 as shown at 3IIA (Figure 6). The arrangement of the duplex levor system is such that selecting element 305 is selectively rotated from one to nine increments upon depression of the corresponding numeral key 3I5. The bellcrank 308 is shown in Figure 6 in its zero position, in which the lug 3083 engages a zero stop 3080 under the tension of spring 3I0. Reference is hereby made to the above noted patent to Friden for a more detailed description of the differential selecting mechanism illustrated herein. The value to which the actuator 300 is set is entered into the accumulator 400 upon rotation of said actuator by means to be described hereinafter.

Means areprovided for locking the settable selecting element .305 during rotation of actuator 300. Said means comprises a locking dog 840 (Figure 6) secured on shaft 8 and adapted to be rocked into engagement with a notched portion of selecting element 305. Arm 842 secured to shaft I is connected by link 844 with a bail 845 pivotally mounted on studs 84B and provided at its right end with an arm 845A (Figure 4) to which a link I6I is pivoted. Upon depression of any operation initiating key, link IBI is moved rearwardly by means to be hereinafter described, thereby rocking bail 845 and, through link 844 (Figure 6), arm 842, shaft MI, and locking dogs 840. Locking dogs 840 are maintained in looking position throughout the operation of the actuating mechanism and are thereafter returned to in operative position through the above described linkage by means to be described hereinafter.

Driving mechanism The machine is provided with a motor which drives, through suitable speed reducing gearing, the drive shaft I (Figures 2 and 7) of clutch IIO (Figure 4). Clutch H0 is of the type described in the above mentioned patent to Friden, the housing of said clutch being provided with an opening in the periphery thereof which is adapted to be engaged by nose I ll of clutch control bellcrank II to control engagement and disengagement of said clutch, as fully disclosed in the above mentioned patent.

Suitable reversing gearing is interposed between the clutch H0 and the actuator 300 (Figures 1 and '7) of the typedescribed in the patent to Friden No. 1,682,901, dated September 4, 1928. Either gear I3I or gear I33 (Figures 1 and 7) may be caused to transmit rotation from the clutch housing to the actuator, depending upon the direction of rotation of the actuator to be affected. The gear I3I drives through a train of gearing to drive said actuator in an additive direction, while the gear I33 drives through a train of gearing including an idler I33A and thus serving to drive said actuator in a subtractive direction. The drive from the clutch housing to the respective gear I3I or I33 is transmitted by a pin splined to said shaft and being shiftable into a seat in either of the respective gears I3I and I33 as described in the patent above referred to. A suitable shifting fork I43 is provided for shifting said pin from the seat in one gear to the seat in the other, said pin being normally disposed within the seat in the gear I3I in the position to drive said actuator in an additive direction.

Power operated clutch engaging means The actuating cluch 0 (Figure 4) is controlled by the clutch release bellcrank I I5 pivoted on shaft H5. Said bellcrank is provided, on its forward arm, with a pin I I9 which normally seats in a notch in the nose of a clutch control link I2 I.

The forward end of this link I2I is pivoted at IZIA (Figure 5) to the rockable plate I5I pivoted at i52 to supporting plate 2I0. Plate I5I is constantly urged toward the rear of the machine by a strong tension spring I53 secured to an upstanding ear I5IA formed on said plate and a suitable pin on the frame of the machine (Figure 4). Said plate I5I is normally held against rearward movement by latching member I 54 (Figures 4 and 5) pivoted at I5IB thereon, the forward end of said latching member being formed as a latchingnose to engage a lug I56 secured to supporting plate 2H), and spring H8 then acts to maintain clutch IIO disengaged.

Means are provided for releasing latch I54 so that spring I53 may move plate I5I to the rear to cause engagement of the clutch. An arm III (Figures 4 and 4A) is pivoted at I'IIA to an ear depending from the cover plate, and is provided with a pin I'IIB on its free end which overlies a pawl I55 pivoted on the rearward end of latching lever I54, said pawl being yieldable in a clockwise direction about its pivot point. Arm III is rocked downwardly by operation of any control key, in a manner to be hereinafter described, and upon such downward movement pin IIIB contacts the pawl I55, and since said pawl is nonyieldable in this direction of movement, latching lever I54 is rocked in a counter-clockwise direction freeing plate I5I for rearward movement. It is to be noted that as the arm Ill, and pin I'lIB thereon move upwardly at the end of the operation, pawl I55 yields to permit passage of said pin to the position shown in Figure 4 without afiecting lever I54.

Means are provided for limiting the rearward movement of plate II upon release of the latching means therefor, said means comprising an extensible spring linkage I51, I58. Link I58 of said double linkage is pivoted at I58A to supporting plate 2I0 and is provided with a pin I58B engaging a corresponding slot I51A in link I51. Links I51 and I56 are provided with elongated openings intermediate their length within which compression spring I59 is retained by suitable struck out legs. Pin I5IC secured to the upper end of plate I5I extends through slots provided in the rearward ends of links I51 and I58 and also serves as a pivot for link I6I heretofore described as controlling locking means for the selecting mechanism. Thus the movement of pin I5IC rearwardly, under influence of spring I53, is limited by the length of the slot in link I51. The slot in the rearward end of link I58 is longer than the corresponding slot in link I51 to permit movement of plate I5I and link I51 with respect thereto. The rocking movement of plate I5I toward the rear of the machine acts through link IN to rock clutch release beilcrank H5 in a counter-clockwise direction against the tension of spring IIB to cause engagement of clutch H0, in which position it is maintained throughout the operation determined by the operated key.

Means are provided controlled by the release of the operated control key for restoring the clutch engaging means to inoperative position at the end of an operation. A pawl I16 (Figure 4) is pivoted at its rearward end to the upper end of an arm I11 pivoted on a suitable ear on the base plate at I11A. Arm I11 is connected by a link I18 with the lower arm of a bellcrank I19 loosely mounted on shaft IIB, the upper arm thereof being held, by tension spring I18A, in engagement with a cam I8I secured to the housing of the actuating clutch H0. The rise on cam I8I is so positioned that it rocks the bellcrank I19 immediately before i the end of each cycle of counter-clockwise rotation, so that bellcrank I19, link I18, arm I11, and pawl I16 are oscillated near the end of each cycle of operation. The nose of pawl I16 is adapted to engage, upon forward movement thereofja lateral extension I5ID on the upper rearward edge of plate I5I to rock said plate'to inoperative position, where it is shown in Figure 4. This operation may occur when pawl I16 occupies the position shown in Figure 4. However, whenarm IN is moved downwardly by the operation of any control key, pin I1ID thereon moves pawl I16 downwardly against .the tension of spring I16A so that said pawl reciprocates beneath the lateral extension I5ID on plate I5I as long as a control key is held in operating position. As will be described hereinafter, movement of any of the said control keys to inoperative position permits upward movement of arm "I thereby permitting spring I16A to move pawl I16 into the plane of the lateral extension I5IB whereupon its next forward movement will restore plate I5i to its forward position where it will be latched by latching member I54 engaging lug I56 under the influence of tension spring I543.

Plus key control Plus key 200 (Figures 1 and 4) comprises a A pin 205 secured to the frame "I extends through the plate IIII and carries at the outer end thereof an arm 206 (Figure 4) the rearward nose of which overlies the offset portion "IQ of arm "I (see also Figure 4A). Thus depression of plus key 200 rocks arm "I downwardly to release latch I54 thereby releasing plate I5I for rearward movement under the influence of tension spring I53 to cause engagement of the clutch in the manner heretofore described. Such downward movement of arm I1I also moves pawl I16 to inoperative position until the plus key is released whereupon pawl I16 and arm "I rise under the influence of spring I16A, and pawl I16 during its next forward movement contacts lateral extension I5 ID on plate I5I, restoring said plate to inoperaive position where it is latched by latching member I53. I

Multiplier key control A series of multiplier keys 130 (Figure 2), of differing numerical value, are mounted for verticalsliding movement on pins 135 on supporting plate 132, each key being normally maintained in its raised position by spring 133 tensioned between each upper pin 134 and a lateral extension on the lower end of each key stem 13I The lower end of each key stem 13I is provided with a nose 13IA which is adapted upon depression of the key to cam a latching slide 135 to the right and tiplier control unit corresponding to the valueof the depressed key. Each key stem 13f is provided with a laterally extending pin 138 which overlies a camming notch in a differential slide 140 slidably mounted on the plate 132. Slide 140 is moved longitudinally to a different position upon the depression of each of the keys 130, due to the differing inclinations of the sides of notches 142 formed in the upper surface of said slide. The opposite sides of each notch are complementally inclined to cause proper positioning of the slide upon depression of each key, regardless of the prior position of said slide, while the bottom ,of each notch is formed as a socket adapted to resolve the pin 136 to accurately position said slide.

A link 1 connected to the forward end of slide 140 at 14 IA is connected at its rearward end to the short arm of a bellcrank 120, the longer arm of which operates a slide 1) for rocking movement therewith and which is capable of longitudinal movement with respect to said bellcrank, as fully set forth in the above mentioned patent to Friden. The arrangement is such that the differential positioning of slide 140 is transmitted through link "I to bellcrank 120, thereby angularly positioning slide 1H] and pin 1Il carried on' a depending ear thereof in a position corresponding to the value of the depressed key. -In a manner fully set forth in the above mentioned patent, the slide 1I0 receives step by step movement from gear 1I3 (Figufe 2) which is moved one increment by a single tooth 1I4 upon each rotation of clutch IIII to whichsaid single tooth is secured. During the last increment of movement of slide 1I0, pin 1 contacts the aligned step of a. stepped plate 100 moving the plate rearwardly to terminate the operation in a manner fully set forth in the above mentioned patent to Friden. This movement of stepped plate 186 is utilized to arrest the machine even though one of the multiplier keys 138 remains depressed, as will be set forth hereinafter.

Means are provided for releasing the spring operated clutch engaging means upon depression of a multiplier key. Arranged at the side of slide 148 and directly below pins 138 thereon, is a bar 158 which is supported for parallel motion on links 15I and which is normally held in elevated position in contact with pins 138 by the spring 152. Due to the inclination of links 15I depression of a key 138 causes a rearward and downward movement of the bar 158 and a clockwise movement of links 15I. Secured to the rearward link 15I and offset therefrom is a finger 153 (Figures 2 and 4) the hooked end of which overlies the offset portion I1IC of arm I1I (see also Figure 4A). From the foregoing description it is seen that the described oscillation of the rearward link 15I through finger 153 rocks arm I1l downwardly to cause release of plate I5I to cause engagement of the clutch in the manner heretofore described.

Means are provided for enabling the power 'operated disabling means for the clutch engaging" means after a number of rotations of the actuating mechanism corresponding to the value of the depressed multiplier key. Secured to a depending ear on plate 180 is a forwardly extending link 188A which is slotted intermediate its ends to receive a pin 135C secured to the latching slide 135 (Figures 2 and 3). Upon rearward movement of slide 188 during the last cycle of actuation determined by the depressed multiplier key, said movement occurring at approximately mid-cycle position as seen by the relative position of the tooth on single tooth gear1l4 and gear 1I8, link 188A moves latching slide 135 to the rear thereby releasing nose 13IA on key stem 13I from hook 135 beneath which it was held, so that multiplier key 188 is free to rise to inoperative position under the and pin I5IB (Figure 5).

influence of its spring 133, thereby permitting parallel bar-158 to rise upwardly and link 15I to rock in a counter-clockwise direction thereby raising the hook 153 to the front and releasing arm "I to permit pawl I16 to be positioned in front of the lateral extension I 5ID and restore plate I5I to inoperative position upon reciprocation of. said pawl toward the end of the cycle then in progress.

Means areprovided for disengaging the clutch and disabling the power operated clutch engaging means independently of the release of the multiplier key when said key is held depressed by the operator in which event pawl I16 is not permitted to move into the path of the lateral extension I5ID on plate I5I. Link 188A (Figure 2) is provided at the forward end thereof with a slot engaging a pin I86A on a short arm I86 secured to shaft I52 (Figures 2 and 4). Secured to shaft I 52 adJacent to plate I 5| is a short horizontal arm I81 (Figures 4 and 5) to the end of which is pivoted a vertical arm I88 provided at its upper end with a lateral extension I 88A which lies to' the rear of and is held in contact with plate I5I by a spring I88B tensioned between said arm I88 Upon rearward movement of slide 188A toward the end of a multiplying operation, arm I86, shaft I52, and arm I81 are rocked in a clockwise direction as viewed in Figures 4 and 5. whereby arm I88 is moved upwardly until the lateral extension I 88A thereon engages a notch I 51E formed in the rearward edge of plate I5I. It should be remembered that in the active position of plate I5I the linkage I51, I58 is in its extended position whereby the vertical edge I510 formed on the rearward end of link I 51 is no longer aligned with the forward edge of plate I5I but occupies a position in alignment with the rear edge of slot I5IE so that extension I88A is now free to enter and latch in said notch under the tension of spring I 883.

When arm I88 is in its upper position with lateral extension I88A lying in the notch I5IE in plate I5I, and pawl I16 is in its lower position, the rearward edge of extension I88A abuts the shoulder I16B formed on the pawl I16 so that said pawl is adapted upon reciprocation to contact extension I88A and rock the plate I5I to its forward inoperative position where it is retained by latching member I54. During the latter part of such movement spring linkage I51, I58 is compressed and after retraction of pawl H6 forward edge I5'IC of link I51 moves into alignment with the rearward edge of plate I5I carrying lateral extension I68A out of engagement with the notch I5IE, thereby permitting downward movement of arm I88 when the depressed multiplier key has been released.

Minus key control Minus key 2211 (Figures 1 and 4) is mounted for vertical sliding movement by means of a slot formed therein engaging a stud 22I on the supporting plate 2lll. A wire spring 222 engages pin 223 on the stem of said key and urges said key to raised position. The intermediate portion of the stem of the minus key 220 is curved forwardly and carries a rearwardly extending finger 228A which overlies a roller 226 on the horizontal arm of a bellcrank 224 pivoted at 225. Upon depression of the key 228 bellcrank 224 is rocked in a counter-clockwise dirertion. As shown in Figure 4, roller 226 on bellcrank 224 overlies arm I1I so that such movement of the bellcrank causes downward rocking movement of arm III to control the operation of the clutch engaging and disengaging mechanism in the same manner as described in operation thereof under control plus key 280.

Power operated reversing control Power operated means are provided for setting the reversing gearing to determine subtractive operation of the actuating mechanism. As previously described, camming member 228 (Figures 1 and 7) controls the position of shaft I42 and thereby the setting of the reversing gearing. Connected to said camming member is a i link 221 to which is attached a strong tension spring 221A, the other end of said spring being secured to the frame of the machine, this arrangement tending to move link 221 rearwardly and rock member 228 to set the reversing gearing I3I, I32 for-subtractive operation. Link 221 is normally latched in forward position and means are provided for tripping its latching means upon depression of a negative initiating key. Link 221 is supported intermediate its 0 ends by an arm I BI pivoted on stud 225 and is slotted at its forward end to engage a stud I92A on supporting plate 2". Link 221 is provided on its upper forward edge with a lug I92B which is adapted to be engaged by a lateral extension 7 I93A on the forward end of latching member I83 when link 221 is in its forward position. Latching member I93 is adapted to oscillate about a stud I930 on the supporting plate 2I8, being urged into latching position by a spring I823 7i tensioned between the forward end of said latching member and a suitable lug on the base plate.

Latching member I93 is provided at its rearward end with a nose, the upper portion of which is slotted to receive a pin 223A on minus key 229 and which is provided with a lateral camming extension I93D adapted to cooperate with a pin 69213 on the division slide as described hereinafter. Pins 223A and 6923 are adapted respectively upon operation of the minus key and the division slide to rock latching member I93 about pin I930 whereby its forward end is raised from engagement with the lug I92B on link 221, thus freeing link 221 to move rearwardly under the influence of spring 221A to set the reversing gearing. The setting of the reversing gearing is accomplished before the engagement of the clutch as pin I'IIB (Figure .4) is spaced a sufficient distance above pawl I55 to allow time for such setting before latching member I54 is moved to inoperative position.

Power operated means are provided for restoring the reversingmechanism to its normal positive position at the conclusion of subtractive operation. Said means comprises a twoarmed lever I94 (Figures 1 and 1A) loosely mounted on the drive shaft I99 and being pro-- vided at its upper end with a roller I94A which engages the periphery of a cam I95 secured to a shaft driven in time with the actuating mechanism so that lever I94 is reciprocated once for each operation of the actuating mechanism. Means are provided for enabling the power operated restoring means during the last cycle of actuation determined by the operated control key. Interponent I96 (Figures 1 and 1A) rotatably and slidably mounted on a rod I9! which is retained in suitable supports on the base plate, said rod being provided with a finger I9IA' engaged by interponent I96 under the influence of a spring I98 which serves as both a compression v and a coil spring. One end of said spring- I98 is secured to the forward support for rod I9l while the other end is fastened to rockable interponent I96 so that said interponent is urged in a clockwise direction as viewed in Figure 1A against finger I9IA.

Upon movement of inoperative position lateral camming-extension I93D formed thereon engages bent end I913 of rod I9'I rocking said rod and interponent I96 in a counter-clockwise direction (Figure 1A) out of the path of a pin I94B on the lower arm of lever I94. When the operated control key is released the nose of latching member I99 moves upwardly thereby permitting rod I9l and interponent 7 position shown in Figure 1. In that position pin I94B on the lower arm of lever I94 is adapted upon subsequent reciprocation of said lever to contact interponent I96 moving the same forwardly and thereby link 221, a lateral extension of which abuts the forward edge of interponent I96 when said link is positioned to determine subtractive operation. Upon rearward movement of link 221, latching member I93 becomes effective to retain the reversing control means in additive position as shown in Figure l.

Interlocking means are provided for preventing simultaneous operation of plus key 299 and minus key 229. Upon depression of plus key 299 forward supporting link 292 therefor is adapted to overlie lateral extension I93A on lever I93 to prevent movement thereof by minus key 229 in the manner described heretofore. Upon depression of latching .member I93 to.

I99 to be restored byspring I98 to the minus key 229 lateral extension I93A moves into engagement with notch 292A in link 292 thereby preventing depression of plus key 299.

Division key control Means ar'eprovidedforenabling the power operated clutch engaging means upon movement of the division control means to operative position. The specific construction-of the division control mechanism is not essential to an understanding of the invention and is not described herein, reference being made to the British patent to Friden No. 342,044, accepted January 29, 1931 for a full disclosure of the same. Upon operation of the division key, pin 6020 (Figure l) lying in front of the vertical arm of bellcrank 224 is moved rearwardly and rocks said bellcrank whereby roller 226 depresses link III to control the release of plate I5I to engage clutch II9 in the manner previously described under the heading of Minus key control.

I claim:

1. In a motor driven calculating machine having cyclically operable actuating mechanism and a controllable transmission between said mechanism and the motor; the combination of means including a spring-urged member movable to control said transmission to cause connection of said motor with said actuating mechanism, means driven by said motor for moving said member against the tension of its spring, and a member for-rendering said motor driven means ineffective to thereby prevent operation of said transmission ing means, and an operation controlling element for concurrently tripping said restraining means I and rendering said returning means ineffective.

3. In a ,motor driven calculating machine, a spring-pressed control member movable between two positions, means for restraining said member in its first position, means for tripping said restraining means, a motor driven element, and means operated thereby for restoring said member to said first position, means for altering the path of movement of said restoring means so as to render it ineffective to restore said member, and a shiftabie interponent for rendering said restoring means effective to restore said member during its movement in said altered path.

4. In a motor driven calculating machine, actuating mechanism and selecting mechanism there for, driving means for said actuating means including a clutch, means for introducing values into said selecting mechanism, means for locking the selecting mechanism in set position, means for causing engagement of said clutch, means to control operation of said locking means and said engagement causing means seriatim, including an energy storing mechanism normally restrained in an energy storing position, and manually operable means to release said mechanism.

5. In a motor driven calculating machine having cyclicallyoperable actuating mechanism and a controllable transmission between said mecha- 'nism and the motor; the combination of means ing cyclically operable actuating mechanism and reversible power transmission between said mechanism and the motor; the combination of means including a spring-urged member movable to control said transmission to effect connection of the motor with the actuating mechanism, means for restraining said member against such movement, a plurality oi manually operable devices for releasing said member from said restraining means, and means controlled by one of said del vices for reversing said transmission.

ANTHONY B. MACHADO.

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