US1416363A - landsiedel - Google Patents

Description

H. LANDSIEDEL.

ADDING MACHINE.

APPLICATION FILED swnzo. I919.

1 ,416,363, Patented May 16, 1922.

"' 3 SHEETS-SHEET I.

H. LANDSIEDEL.

ADDING MACHINE.

APPLICATION FILED SEPT. 20. 1919.

1,41 ,363, Patented May16,122.

MEET 2.

3 SHEETS-S kwenfon 2) Harry Unis/e52 M 37 & W

H. LANDSIEDEL.

ADDING MACHINE.

APPLICATION mm SEP.'.20, m9.

Patented May 16, 1922.

3 SHEETSSHEET 3.

UNITED STATES PATENT OFFICE.

HARRY LANDSIEDEL, 0F NORWOOD, OLHO, ASSIGNOR TO THE DALTON ADDING MACHINE COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

Application filed September 20, 1919.

7'0 all 'w/wmit may concem:

Be it known that I, Hannr LANosmoEe, a citizen of the United States, residing at Nor-wood, Hamilton County, and State of Ohio. have invented a new and useful Adding Machine, of which the following is a specification. v

This invention relates to. adding machines.

Many, if notall, adding machines now on the market include a main shaft, usually a rock shaft, which is turned inonedirection to permit the adding mechanism and, in case the machine comprises recording mechanism, also to permit the recording mechanism to operate. In the machines in which a rock shaft is used, the return movement of the rock shaft toward its starting point is utilized to restore certain parts of the machine to their starting points from which they start to move or operate in the operations of the machine. During the first or initial portion .ofthe moyement of the rock shaft toward its starting point less power is required to actuate said shaft toward its starting. oint than is required dur-,

ing the final or ast rtion of the movement of the rock shafi, toward its starting point. In the case, of some of the machines now on the market, more power is needed to actuate the rock shaft during the final or last portion of its movement toward its starting point because it is then that the rock shaft is required to overcome the resistance and inertia of some parts of the machine and to move such parts to their proper positions for other operations, against the resistance of their actuating devices or springs.

The machines at present on the market are not equipped with any mechanism to apportion the power applied to the rock shaft, whereby less power may be applied to the rock shaft during the first or initial portion of its movement toward its starting point than is applied to the rock shaft during the last or final portion of its movement toward its starting point. As a consequence of the lack of appropriate mechanism for apportioning the power applied to the rock shaft durinp its movement toward its starting point. the rock shaft is actuated with more power and iuoref 'rupidly than is do Specification of Letters Patent.

Patented May 16, 1922.

Serial No. 325,096.

sirable during the first portion of its return movement.

An .object of the present invention is to overcome the deficiencies mentioned, and others, and to provide a novel and efficient mechanism for use in adding machines and mother machines in which my invention maybe satisfactorily employed which will apportion ower applied to any given part or mechan sm such as the rock shaft of addmg machines, so that the power will vary as needed.

O ther objects will appear from the following description in which reference is made to the drawings and in which drawingsg- 1g. 1 is a view illustrating one embodiment of the invention applie to the main shaftof a Dalton adding machine.

F g. 2 is 'a plan view of the invention in connection with the main shaft and differential mechanism of a Dalton adding machine. y

3, is a side elevation illustrating the position of -the parts when the rock shaft is turned about one-half of the entire distance which it is required to turn from its starting point.

Fig. 4: is a side elevation illustrating the positions of the parts when the rock shaft reaches the end of its movement from its starting point.

Fig. 5 1s a side elevation showing the positions of the parts when the auxiliary actuator or power increasing device functions to actuate or increase the power a plied to the main shaft during the last or nal portion of the movement of said shaft toward its starting point.

The Dalton adding machine in which 1 have chosen to illustrate my present invention comprises a main rock shaft 1. The main shaft 1, as is well known, controls and actuates the connections controlling the operation of the machine.

The machine comprises a set of numeral key levers 2 operable to set up numbers in the differential mechanism 3 after which the main shaft 1 is turned in one direction to permit the adding pinion actuators l to operate as required to actuate the adding pinions (not shown) The machine shown lOU also comprises recording devices 5 eo-ordinated with the racks 4 for recording the numbers added and the totals thereof. The Dalton adding machine is manufactured under the Hubert Hopkins Patent, No. 1,039,130, dated September 94, 1912, and further description of the Dalton machine is unnecessary in connection with the present invention.

My invention comprises mechanism for apportioning the power to the shaft 1 as the power may be desired. 'As shown, an arm 6 is attached to the shaft 1, and an actuating spring 7 is connected with "s'aid arm 6 by means 0 a link 8 having one end connected with the spring! and its opposite end provided with a pivotal connection 9 with the arm 6. The rock's'haft l may be turned from its starting point'fnafiual ly by means of a lever 10, orother'wisdas desired. When the rock shaft r'ea'clies the limit or extent of its move'meht from its starting point it is released; whereupon the 7, which had been tensidned or energized by and as an incident to the movementpf the rock shaft from its starting oint, functions to impart the initial or rst portion of the movement of the rocksha'ft toward its starting point. p

In the particular-embodiment of m vention iIlustrdtied;-'less'power is applied-to the rock shaft during-the fiistoiiniti'alportion of its movement' tofvtiid its starting point than is applied to said shaft during the last or final portion of its'mo'vement toward its starting point. Obviousl ,how' ever, these pro'visions in'aybe vane within the scope of tlie in'ventionand -do"n'otrestrict myself uni-Essentially.

In the particdlar embodiment of the invention shown,the increase of power is applied to theshaft 1 by a 'springdt-a'nd mechanism ara'ng'ed to co-operate therewith. One end of each of the springs 7 and 11 is connected to a stationaryattachment.' The opposite end of the spriii' 11 is pivotally connected with an an'gular ever 12, one end of which is pivoted on a support 13. l he arm 6 is provided with an arcuate extension 14, the same curving eccentflcal ly relative to theaxis of the shaft 1, so that the free end of the extension 14 is farther from the axis of the shaft 1 than i'stbe-fohv'ardportion of said extension. The lei-ei- 1-2 sup ports a roller 15 extending over the upper edge of a plate 16. The plate 16 is pivotally supported upon a stud 1/? carried by the extension H of the arm 6 and may have its upper edge curving on the same radius of curvature as the upper edge of the extension 14; except that the rear end of the plate 15 has a raised portion 18 which extends above the plane of the adjacentcurved edge of the extension 1-1. The arrangement and construction is such that when the machine is idle or at. rest the parts occupy the positions shown in Fig. 1. As the shaft 1 is turned from its starting point, the plate 16 is moved under and contacts with the roller 15 and, due to the eccentric arrangement of the plate 16 and the extension 14 relative to the axis of the shaft l. the lever 12 is moved in a direction to tension and energize the spring 11. As the shaft 1 moves through the last or final portion of its movement from its starting point, the roller 15 engages the raised portion l8 ol the plate 10 thereby raising the forward end of the plate 16 to the position shown in Fig. 4. Extent of movement of the plate 16 is limited by a pin-in'slot construction 19. A latch device, comprising a multiramose member 20 and a pin 21, is provided to sus- Cain and support the plate 16 in its raised position. The member 20 is pivoted upon a support 22 on the plate 16 and one branch thereof is fornied with a shoulder 23 on its lower portion which engages the pin 21 when the latch member 20 is raised with the plate 16. A spring '24 is connected with one branch of the latch member 20 in a way to actuate the latch member 20 into latchin}; engagement with the pin 21 when said latching member is raised. The lever 16 is latched in its raised position by a latch member 25 engaging a pin and roller device 26 on the lever 16. A spring 27 functions to engage the latch member 25 with the device 26.

The arran ement and construction is such that when the shaft 1 completes its movement away from its starting point, the latch de'vice 2021"makes latching engagement; and the latch device 2"-26 also nialteslatehing engagement as will be understood by reference to Fig. 4. The shaft 1, after being released on completion of its forward movement, by which is meant its movement away from its'starting point irrespective of the construction which it moves from its starting point, is actuated after the first or initial portion of its movement toward its starting point by the spring 7 only. or other actuator provided for that purpose. When additional or greater power is needed or desired for the shaft 1, the spring 11 and the co-opcrating devices function to furnish that greater or additional power that is needed or desired. The return movement of the shaft 1 and its vo-operating meclnr nism is continued independently of the spring 11 until the roller 15 passes onto or against a surface 18 on the plate 16. When this engagement of the roller 15 with the surface 28 of the plate 16 orcuis the spring 11 exerts its power upon the sha ft 1 and thereby upon the parts actuated by Said haft 1. to assist the sprin T to complete the last or linal movements of said shaft and said parts operated thereby toward their starting points. 'By reference to Fig. 5 it will he understood that the plate 16 1s latched in its upper position during the last or final portion of its movement of the shaft l towards its starting point, and that when the time arrives for the roller 15 to engage the surface 28 the rear end of the plate 16 contacts with the lower end of the latch member 25 and disengages said latch mcm' her 25 from the device 26, leaving the lever 12 under control of the spring 11 and permitting the roller 15 to engage with the surface 28 of the plate 16. From this time on, the spring 11 acts upon the shaft 1 to increase the power applied to it duri the time that said shaft is moving tdwal' 3 its starting point. Finally, at about the time that the shaft completes its movement toward its starting point, the upper branch of the latch member 20 contacts With the roller 15, thereby releasing the latch,2021 and permitting the spring 24 to draw theplate 16 to its idle position shown in Fig. 1. In the idle or normal position the lever -12 may bear against a stud or roller 29, relieving the pressure of said lever from the connections on the shaft 1, and leaving the shaft 1 free to be started on its forward movement without resistance from the spring 11. f

From the foregoing it will be understood that my invention fully and satisfactorily serves its purpose. The forward movement of this shaft 1, as in the embodiment shown, may be utilized to energize the spring -11 by somewhat indirect force applied by the or cuate edge of the plate 16 against the roller 15. At the proper and desirable time, during the return movement oll the shaft 1 toward its starting point, the power or energy thus stored up .in the spring 11 enters into the equation; and functions to assist the sprin 7, or other actuator that may be employe to complete the last or final movement of the shaft 1 toward its starting point during the time that the additional power is needed or desired. i

Obviously, the invention is capable' of many uses and the construction thereof may be widely varied without departure from the principle and scope of the invention as set forth in the appended claims. I (lo-not restrict myself to unessential particulars, but what I claim and desire to secure by Letters Patent is:

l. Mechanism of the character described, comprising a shaft rockable from and to a starting position, means for turning said shaft from its starting position, an actuator for turning the shaft toward its starting position, an additional actuator arranged to co-opcrate with the fll'StdlkllilEtl actuator during a portion of the turning movement of the shaft. leaving the first-named actuator to turn the shaft independently of the secoinlnaincd a tuator liil' portion of the tent of movement of said element in one i direction, an additional actuator arranged to oo-operate With the firstaianied actuator during a portion of the movement of said element, leaving the first-named actuator to actuate said element independently of the second-named actuator for a portion of the movement of said element, and means for constantly increasing the energy of said ad ditional actuator during the entire move ment of Said element from its starting position.

3. lilechanism of the character described, comprising a rock shaft to be turned from and to a starting position, an actuator for turning the shaft during the initial portion of its movement toward its starting position. an additional actuator arranged to cooperate with the first one during the final portion of the movement of the rock shaft toward its starting position, leaving the lll'52tnamed actuator to turn the shaft inde pendently of the second one during the initial movement of the rock shalt toward its starting position, and means for constantly increasing the energy of said additional ac tuator during the entire movement of said shaft from its starting position.

4. Mechanismof the character described, comprising an element to be actuated. an actuator for actuating said element through the full extent of movement of said element in one direction, an additional actuator arranged to co-operate with the iirst-namcd actuator during a portion of the inovcnu-nt of said element, leaving the first-named 1n tuator to actuate said element independently of the second-named actuator for a portion of the movement of said element, inc-ans for constantly increasing the energy of said ad ditional actuator during the entire movement of said shaft in one direction. and mechanism controlling the SLLl)!\tlll2\mt'Lltli'- tuator as required to enable the Same to operate as aforesaid.

5. Mechanism of the character described. comprising a rock shaft to he turned from and to a starting position. an actuator for turning the shaft during the initial portion of its movement toward its starting osition. an additional actuator arranged to (o-operate with the first one dnrin [ln' tin-til lit tion of the movement of tlurml; shaft l. ward its starting posilion. leui in [lie iii-sinamed actuator to turn iln' shall indi peiltlclitly of [lie scriunl our illll 111g lln' 1:11

llill &

tial movement of the roClc shaft toward its starting position, means for constantly and continuousl increasing the energy of said additional actuator during the entire movement of said shaft from its starting position, and mechanism controlling the second named actuator as required to enable the same to operate as aforesaid.

6. Mechanism of the character described, comprising a shaft to be turned from and to a starting position, means for turning said shaft from its starting position. an actuator for actuating said shafttoward its starting position arranged to be energized by the turning of said shaft from its starting position, an additional actuator, means for con stantly and continuously increasing the energy of said additional aetnator during the entire movement of said 'shaft' from its starting position, and means for utilizing the energy of said additional actuatorfto actuate said shaft toward its starting position. and preventing said additional actuator from actuating said shaft during the initial portion of the movement of said shaft toward its starting position.

7. In an adding machine, a rock shaft roclcable from and to 'a starting position, an arm in connection with said shaft, aspri'n'g connected with said arm 'for imparting initial movement to said shaft toward its starting position, an actuator independent of said spring. means for constantly. and continuously increasing the energy of said actuator as an incident to the turning of said shaft from its startingposition, and mechanism preventing, actuation of said shaft by said actuator during a portion of the movement of said rock shaft tmvard its starting position and arranged to 'co-operate with said actuator to enable said actuator to actuate said rock shaft toward starting osition during a portion of the movement of said rock shaft toward said starting position.

i In an adding machine, a shaft, :1 spring for artnating the shaft, through full extent of movement of said shaft in one direction. an additional spring arranged to cooperate with and assist said first-named spring to actuate said shaft during the final portion of the movement of said shaft. leaving the first-named spring to more the shaft alono during the first portion of the movement of said shaft. means for energizing said additional spring. and a hvtch device lmlilillg said additional spring energized until it is time for said additional spring to cooperate with and assist said first-named spring.

9. in an adding machine. a rorlc shaft arranged to he turned from and to a starting position. an actuator, a cam operated by said shaft f r energizing said actuator by the turning inovenfient of the shaft from its starting point and leaving said shaft free from a part of the power from said actuator while said actuator is being energized, a latch device for effecting latching engagement between said actuator and said shaft to enable the actuator to turn the shaft, means for holding said latch device in latching position,-and means for moving said latch device to unlatching position as an incident to movement of said shaft to its starting position 10. In an adding machine, a rock shaft arranged'to be turned from andto a starting position, an arm on said rock shaft, a latch device supported bysaid arm, a'sprinm a connectionactuated by said arm for energizing said spring'as an incident to the turn ing of'said rock shaft from starting position, and an element on said arm for en gaging said-latch device after 'said shaft has'turned a pdrtion ofthe distance toward its starting point to enable said spring to actuate said rock shaft.

11. In am adding machine, a rock shaft arranged to be turned from and to a starting position, a spring, a lever connected with said spring means for actuating said leverto energize saidspring as anincident to the turning of said shaft from starting position, and a latch device arranged to be engaged by 'suidlever after said rock shaft has completed a'portibh of its movementtoward its starting position to enable said spring to turn said shaft.

' 12. In an adding machine, a rock shaft arianged to be't-urned from and to a starting position, a spring, a leverconnected with said spring, a cam operated by the shaftfor actuating said lever to energize said spring as an incident to the turningof said shaft fr'oinstarting position, a latch device supported by said shaft. and means for positioning said latch device for engagement by said lever to cnablesaid spring to turn said shaft.

13. In an adding machine. a rock shaft arranged to be turned from and to a starting position. a spring, a lever connected with said spring. a cam operated by the shaft. for actuating said lever to energize said spring as an incident to the turning of said shaft from starting position, a latch device supported by said shaft. means for positioning said latch device for engagement by said lever to enable said spring to turn said shaft and means for disengaging said latch device from said lever after said shaft has been turned by said spring.

H. in an adding machine. a rock shaft arranged to be turned from and to a starting position. a spring for actuating said rock shaft toward its starting position. mechanism for energizing said spring. a latch de rice. means for moving said latch device t latching position, and means whereby said latch device and said spring will cooperate to actuate said shaft during the final movement thereof towards starting position, lean ing said shaft free from the cooperative action of said latch device and spring during the initial movement of said shaft toward its starting position.

15. In an adding machine, a rock shaft arranged to be turned from and to a starting position, a spring for actuating said rock shaft toward its starting position, mechanism for energizing said spring, a latch device, means for moving said latch device to latching position, means whereby said atch device and said spring will cooperate to actuate said shaft during the final movement thereof towards starting position, leaving said shaft free from the cooperative action of said latch device and spring during the initial movement of the shaft toward its starting position, and means for moving said latch device to unlatching position after said spring has completed its work.

L6. In an adding machine, a-rock shaft arranged to be turned from and to a starting position, a spring for actuating said rock shaft'toward its starting position, a device for energizing said spring during movement of said rock shaft from its starting position, and alatch device for effecting latching connection between said-rock shaft and said spring after said rock shaft has moved a portion of the distance toward its starting oint.

17. In an adding machine, a rock shaft arranged to be turned from and to a starting position, a spring foractuating said rock shaft toward its starting position, a device for energizing said spring during movement of said rock shaft from its starting position, and a latch device for effecting latching connection between said rock shaft and said spring after said rock shaft has moved a portion of the distance toward its starting point, and means for releasing the said latching connection before saidroclc shaft starts to move from its starting position.

18. In an adding machine, a rock shaft-arranged to be turned from and to a starting pos1tion. an arm supported by said rock shaft, a ring connected to said arm arranged to energized when said rock shaft is turned from its starting position and to impart initial movement of said rock shaft toward its starting position after saidrock shaft completes its movement from starting position, an additional spring, a lever con nected with saidadditional spring, a latch plate supported b" said arm normall dis enga ed from sai lever, means for moving slid latch plate to position to be engaged by said lever, means for retaining said latch plate in said position to be engaged by said lever, and means for disengaging said latch plate from said leverf spring,

lever, a spring in connection with said lever,

1 In an adding machine, a rock shaft arranged t be turned from and to a starting position, an arm attached to said rock shaft, a lever, a spring in connection with said lever, a device engaged by said arm for moving said lever to energize said spring while said rock shaft is moving from its starting position, a latch member movable to and from posi' tion to engage said device, and means-for supportingsaid latch member in position to he engaged by said device.

20. In an adding machine, a rock shaft movable from and to a starting position, a spring. a lever connected with said spring, a support for said lever, means for actuating said lever to energize said spring during movement of said rock-shaft from its starting position, a latch for supporting said lever in the position to which it is moved as aforesaid,-means for releasing saidlatch after said lever has moved a portion of the distance toward its starting point, "and mechanism for -usin the :energy of said spring to actuate sai rock shaft afterisaid latch has been released. 1

21."In an adding machine,-a rock shaft movable-from and toa starting position, a a lever in connection with said spring, means actuated by the rock shaft during movement thereof from its starting 95 position for moving said lever in a-direction to energize said spring,'a-latch for holding said lever in posi'tion to relieve the power of saidspring' from said rock shaft during the initial-portion of the movement of said rock 7 shaft toward starting-position, andmechan'isni'whereby the power 'of said spring will be used to'actuate the rock'shaft during the final portion of the movement of said rock shaft toward its starting position.

' i 22' In an adding machine, a rock shaft shaft toward its starting position, means for releasing said latch after said rock shaft has moveda portion of 'the distance toward its 'startingposition, and elements wherebythe energy of said spring will be exerted upon said rock shaft after said latch is released.

23. In an adding machine, a rock shaft movable from and to starting position, a

means for moving said lever in a direction toenergize said spring as an incident to movement of said rock shaft from its starting position, a latch for holding said lever in position to retain the said spring CHEF 1 gized and to prevent the energy of said spring from being exerted upon the rock shaft during the initial portion of the move ment of said rock shaft toward its starting position, means for releasing said latch after said rock shaft has moved a portion of the distance toward its starting position, elements whereby the energy of said spring will be exerted upon said rock shaft after 10 said latch is released, and means for controllin said elements.

24; n an adding machine, a rock shaft movable from and to a starting position, a lever, a spring in connection with said lever,

a'cam device actuated by the rock shaft for actuating'said lever to position to energize said spring as an incident to movement of said rock shaft from starting position and mechanism for using the energy of said spring to actuate said rock shaft toward its starting position.

I 25. In an adding machine, a rock shaft movable from and to a starting position, a spring, a leveriu connection with said 2'5 spring, a cam device operated by the rock shaft for actuating said lever to energize said spring, a latch device for holding said lever n position'to prevent the energy of "said spring from'acting on said shaftduring '30 the initialportion of the movement of said shaft toward starting. position, latchin mechanism for usin the ener of. sai 'springto actuate sai shaft during the final portion of the movement of said shaft to- 85 ward its startin position, and means for controlling said l atch device and said latching mechanism to prevent the energy of said spring from being exerted upon said rock shaft during the initial portion of the move- 40 ment of said rock shaft toward its starting position and to causethe energy of said spring to be exerted upon said rock shaft 'during the final portion of the movement of said rock shaft toward itsstarting position.

26. In an adding machine, a rock shaft arranged to be turned from and to a starting position means for turning said rockfshaft from its starting position, an actuator for actuating said rock shaft toward its starting position after said rock shaft has completed its full extent of movement "from its start ing position, a spring for actuating said rock shaft for a portion of its movement towards starting position, a device for energizing said spring during the movement of said "rock shaft from its starting position, and a latch device for eifecting latching connection between the said rock shaft and said spring 7 after said rock shaft has been moved a portion of the distance toward its starting point by said actuator.

27. In an adding machine, a rock shaft arranged to be turned from and to a starting position, means for turning said rock shaft from itsstarting position, an actuator for actuating said rock shaft toward its starting position after said rock shaft has completed its full extent of movement from its starting position, a spring for actuating said rock shaft for a portion of its movement towards starting position, a device for energizing said spring during the movement of said rock shaft from its starting position, a latch device for effecting latching connection between the said rock shaft and said spring after said rock shaft has been moved aportion of the distance toward its starting point by said actuator, and means for releasing said latching connection to enable the said rock shaft to move toward its starting posi tion while said latching connection is released. i 28. In an adding machine, a rock sha arranged to be turned from and to astarting position, means for turning said rock shaft from its starting position, an actuator :for imparting initial movement of said rock shaft toward its stantin position after said rock shaft has stopped its movement from starting ptosition, an arm supported by said rock sha a spring connected to said arm arranged to be energized when said rock shaft is turned from its starting position, a lever connected with said spring, a latch plate supported by said arm normally v.disenga ed from said lever, means :for moving said latch plate topositiontobeengaged by said lever, means for holding said latch plate in said position to be engaged vby said lever, and means for disengaging said latchplate from said lever. a

29. In an adding machine, a rock shaft arranged to be turned from and toe starting position, means for turning said rock shaft to starting position,.an actuator for.

imparting initial movement of said rock shaft toward its starting position after movement of said rock shaft-is stopped, a spring, a lever in connection with said spring, means actuated by the rock shaft during movement thereof from its starting position .for'moving said lever in a direction to energizesaid spring. a. latch for holding said lever in position to relieve power-of said spring from said rock shaft during the initialportion-of the movementof said rock shaft from starting position, and mechanism whereby the power of said spring will be used to cooperate with said actuator in actuating the rock shaft during the final por-.

tion of the movement of said rock shaft toward its starting position.

30. In an adding machine. a rock shaft movable from and to a starting position. means for moving said rock shaft from starting position, an actuator for imparting initial movement of said rock shaft toward starting sition after movement of said rock shaft from its starting position ha stopped, a lever, a spring in connection with said lever, means for moving said lever in a direction to energize said spring as an inci dent to movement of said rock shaft from its starting position. a latch for holding said lever in position to retain said spring energized and to prevent the energy of said spring from being exerted upon the rock shaft during the initial portion of the movement of said rock sha f t toward its starting position, means for releasing said latch after said rock shaft has been moved by said actuator a portion of the distance toward its starting position, and elements whereby the energy of said spring will he used to co operate with said actuator to actuate said rock shaft toward its starting position after said latch is released.

31. In an adding machine, a rock shaft movable from and to a starting position. means for moving said rock shaft from starting position, an actuator for imparting initial movement of said rock shaft toward starting position after movement of said rock shaft from its starting position has stopped, a lever, a spring in connection with said lever, means for moving said lever in a direction to energize said spring as an incident to movement of said rock shaft from its starting position, a latch for holding said lever in position to retain said spring encrgized and to prevent the energy of said spring from being energized upon the rock shaft during the initial portion of the movement of said rock shaft toward its starting position, means for releasing said latch after said rock shaft has been moved by said actuator a portion of the distance toward its starting position, elements whereby the en ergy of said spring will be used to co-opcratc with said actuator to actuate said rock shaft toward its starting position after said latch is released, and means for controlling said elements to operate and co-operateas aforesaid.

32. In an adding machine, a rock shaft movable from and to a starting position, a devi e for turning said rock shaft from its starting position, an actuator for actuating said rock shaft toward its starting position after movement of said rock shaft from its starting position is stopped, a lever, a spring in ronneCt-ion with said lever, a cam device actualed by the rock shaft for actuating said lever to position to energize said spring as an incident to movement of said rock shaft from its starting position, and mechanism for no-operating said spring and said actuator to actuate said rock shaft toward its starting position after said rock shaft has been moved av portion of the distance toward its starting position by said actuator independently of said spring.

In an adding machine, a rock shaft movable from and to a starting position, means for turning said rock shaft from its starting position, an actuator for actuating said rock shaft toward starting position after the said rock shaft has completed its movement from starting position, a spring, a lever in connection with said spring, a cam device operated by the rock shaft for actuating said lever to energize said spring during the time that said rock shaft is moving from its starting position, a latch device for holding said lever in position to prevent the co-operation of said lever and said actuator during the final portion of the movement of said rock shaft towards its starting position, latching mechanism for using the energy of said spring to co-opcrate with said actuator to actuate said rock shaft during the final portion of the movement of said rock shaft toward its starting position, and means for onntrnlling said latch device and said latching mechanism to prevent said spring from (o-operating with said actuator during the final portion of the movement of said rock shaft toward its starting position.

HARRY LANDSI'EDEL.

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