US1212895A

US1212895A - Computing-machine.

Info

Publication number: US1212895A
Application number: US74342113A
Authority: US
Inventors: Frederick A Hart
Original assignee: UNDERWOOD COMPUTING MACHINE CO
Current assignee: UNDERWOOD COMPUTING MACHINE CO
Priority date: 1913-01-21
Filing date: 1913-01-21
Publication date: 1917-01-16
Anticipated expiration: 1934-01-16

Description

F. A; HART. GOMPUTING'MACHINE rrucmon H p JUNE 28. I911. RENEWED I Patented Jan. 16, 191.7.

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BY E I mm WITNESSES: Q 4

F. A. HART. L COMPUTING MACHINE. APPLICATION FILED JUNE 28, I911. RENEWED JAN. 21.1913.

Pzipented Jan. 16,1917.

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W w AM i 5 fiEZ v J Z IV a u I ll 9 ///////////Z 2 v 1 I 2 1 lN-VENTOR: W-azflw WITNESSES:

m AT TOR F, A.,.HART. I COMPUTING mcumg APPLICATION FILED JUNE 2B. (911- RENEWEQ JAN: 21 9135 1,212,895.- Patented Jan. 16,1917.

3 SHEETS-SHEET 3.

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5r" WITNESSES:

mvturom yam 4M @4442 ATT'on u Y UNITED STATES PATENT OFFICE.

'FREDEBICK A. HAR'1, OF JERSEY CITY,"NEW JERSEY, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNDEBWOOD COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A

CORPORATION OF NEW YORK.

comru'rmo-macnmn.

Specification of Letters Patent.

Patented J an. 16, 1917.

Application filed June 28, 1911, Serial No. 685,762. Renewed January 21, 1913. Serial No. 743,421.

To all whom it may concern Be it known that I, 'FREDERIOK A. HAnT,

a citizen of the United States, residing in Jersey-City, in the county of Hudson and State of New-Jersey, haveinvented certain new and useful Improvements in Computing-Machines, of which the following is a specification.

This invention relates to computing machines of the class inwhich numeral keysare depressed to set pins orthe like, and in which a general operator is afterward actuated to drive the dial wheels or other devices to various extents as determined by the keys depressed. In such machines, the general operator has been actuated manually by means of a handle: and means have been provided for insuring that the operator shall give said handle a full stroke in each direction, such means consisting of a pawl-andratchet' mechanism, usually compris ng two pawls, one being inefiective, and the other 7 effective upon one stroke of the handle, and the converse being true upon the return stroke of the handle. The general operator has also in some cases been operated by means of, an electric motor or other source of power; and in such a case the pawl-andratchet mechanism for insuring full stroke of the general operator, is not required or desired.

In the drawings is'disclosed which is providedwith. both a motor drive and a hand drive for the general operator, either of which can be used when desired, to the exclusion of the other; the motor gearing being shiftable out of connection with the general operator.

According to the present invention, the pawl-and-ratchet mechanism or equivalent full-stroke deviw is brought intouse when the motor gearing is thrown out, and said full-stroke device is thrown out when the motor mechanismis brought into use.

The invention is shown in connection with a combined computing and typewriting machine of the Underwood-Hanson type, such as shown and referred to in my application No. 596,451, filed December 9, 1910. The

full-stroke device comprising the invention,

and applied to such machines, embodies a ratchet-wheel or segment and a pair of pawls' which are alternatelythrown into and out of action. I connect to the hinged frame on the same in effective position.

a machine,

which the motor-driven gearing is mounted,

and by which it is shifted out of use, a device for rendering both of said pawls ineffective when the motor frame is swung to bring the motor gearing into use, and for restoring to said pawls their normal functions when the motor or its gearing is thrown out. motor-driven gearing thereon and appurtenant structure, are broadly claimed in my pending application No. 130,961, filed November 13, 1916, as a division of said application 596,451.

In the accompanying drawings, Figure 1 is a sectional side elevation of a combined typewriting and computing machine of the type aforesaid, showing the motor in use,

Said hinged frame with the and the full-stroke mechanism as ineffective.

Fig. 2 is a'sectional front elevation, showing the motor'connection as dropped to a position of disuse. Fig. 3 is a perspective view of the full-stroke mechanism, showing Fig. 4 is a sectional plan of the full-stroke mechanism. Fig. 5 is a sectional side elevation of the fullstroke mechanism in effective position. Fig. 6 is a part sectional front elevation of the full-stroke mechanism. Fig. 7 is a plan of the same. Fig. 8 is a side elevation, show ing the full-stroke mechanism as ineffective.

The typewriting and computing mechanism includes keys having stems 1 to operate linkages 2 to set or project pins 3 upon bars 4, which are movable forwardly and carry racks 5 to mesh with pinions 6 upon dial wheels 7. The paper carriage of the typewriter operatesieuccessively links 8, conhandle 11 is grasped by the operator and pulled forward, and then returned, said handle being provided upon a crank 12. The crank is fixed upon a rock shaft 13, upon the ends of which are fixed segmental gears 14 to mesh with idle pinions 15, the

latter meshing with racks 16, mounted to slide forwardly and rearwardly at the sidesof the base 17 of the adding mechanism;

said racks connected by a cross bar 18, which during its forward stroke engages the depressed pins 3, and drives all the racks 5 to turn all the dial wheels accordingly; an

pawl 22 being effective during the backstroke of the general operator, to prevent forward movement thereof before said back stroke is completed. a

The alternate engagement and disengagement of these pawls is effected by means of tappets 23, 24, in the form of studs projecting from segment 14 or ratchet 20. At the final portion of the forwardstroke of the general operator, the tappet 23 strikes a screw stop 25 fixed upon one arm 26 of a three-armed lever pivoted loosely uponthe rock shaft 13, and swings said lever to raise "another arm 27 thereof, thereby lifting a pin or wrist 28 provided uponthe pawl 21, to raise said pawlclear of the ratchet.

The depression-of arm 26, occasioned by the engagement of the .tappet 23 with the.

screw stop 25, permits the drop of pawl 22 'intoengagement with the ratchet 20, said pawl having a stud ,29 which is shown at Fig. 5 resting on said arm 26, to be thrown out or rendered ineffective thereby during the forwardstroke of the general operator. The screw stop 25 is so set, that the pawl 21 is thrown out practically at the instant of the completion of the forward stroke of the general operator.

At the completion of the return stroke of the general operator, the tappet 24 strikes a screw stop 30, thereby swinging the

lever

26, 27 in the opposite direction, so that the pawl 21 is'let into mesh, and pawl 22 is raised out of mesh, as seen at Fig. 5. Said lever has'a downwardly-extending arm 31 provided with

notches

32, 33 in its lower end, to be engaged by a spring detent 34 to hold-the lever in either posltion; and a finger piece 35 is provided upon the lever to raise either pawl if desire r In addition to the handle 11, there is provided a motor 37 for reciprocating the general operator when desired. The shaft 38 I of this motor has a worm 39 to mesh with a gear 40 that is connected by a clutch mechanism 41 wit-ha shaft 42, the latter having a crank 43 provided at its end with a swiveled block 44,'fit ted to slide in an arm 45 pro- 'videdupon a head 46, the latter having a neck 47 fitting'in a yoke 48 secured upon one of the sliding racks 16 of the general operator.

By depressing a key 49, a lever 50 is vibrated to actuate a pin 51, which controls the clutch mechanism 41; and upon one complete revolution of the shaft 42, the clutch mechanism is restored to normal idle position,as set forth in said application.

The gear or worm wheel 40, head 46 and intermediate parts are mounted in a frame 52, which has a hub 53 by which it is hinged loosely upon the shaft 38 of the motor, so that it can be swung from the raised effective position at Fig. 1, to the dropped ineffective position at Fig. 2; a handle 54, connected to a lever 55, being provided for raising and lowering said frame 52, as explained in said application.

When the gear frame 52 isdropped, and the handle 11 is employed for reciprocating the general operator, the

pawls

21 and 22 are effective in alternation, as above set forth; but I provide means in connection with the gear frame 52 for throwing out said pawls whenever said gear frame is lifted from the idle position at Fig. 2 to the effective position at Fig. 1.

Upon the end of the gear frame is provided a projecting finger 56, which, at the elevation of said gear frame, engages a finger 57 formed upon the lower end of a vertical link or bar 58, which at its upper end is pivoted at 59 to the end of a lever 6O, the latter fulcrumedat 61 upon the base 17 'of the adding machine, and havin lugs 62,

- bar 58 may have a shoulder'66 to rest upon.

' one of two pins 67, by which it is guided.

When the gear frame 52 is swung down to the Fig. 2 position, the

members

58, 60

drop of their own weight to idle positions,

thus freeing the

pawls

21, 22, so that they may resume their functions.

Variationsmay be resorted to within the scope of the invention, and portions of the improvements may be used without others. I Having thus described my invention, I claim:

1. In a machine of the character specified, the combination, with a driving part; of a device for manually operating said driving part, a motor for automatically operating said driving part; a full-stroke device associated with said driving part and effective at the operation of said manual device; con:

trolling means for alternatively connecting or-disconnecting said motor with or from said driving part; and means operated automatically,lconsequent upon the connection.

of the motor, for rendering said full-stroke device inefi'ective. V

2. In a machine of the character specified, the combination, with a driving part; of a device for manually operating said operate said pawls in alternation during the driving part; a motor for automatically operating said driving part; 'a full-stroke device associated with said driving part and comprising pawland -ratchet mechanism, said full-stroke device effective at the operation of said manual device; controlling means for alternatively connecting or disconnecting said motor with or from said driving part; and means operated consequent upon the connection of' the motor, for preventing engagement between the component members of said pawl-and-ratchet device, to render said full-stroke ineffective.

3. In a machine of the character specified,

the combination, with a driving part; of

adevice for manually operating said driving part; a motor for automatically operating said driving part;v a full-stroke device associated with sald driving part, and effective at the operation of said manual device; gearing driven by said motor and adapted for connection with said driving part, to actuate the same; a frame carrying said gearing movable into and out of position to effect such connection; and means operated by said frame at its connecting movement, for rendering said full-stroke device ineffective.

4. In'a machine of the character specified, the combination, with a driving part; of a device for manually operating said driving part comprising a shaft, and a handle therefor; and a full-stroke device associated with said driving part and comprising a ratchet secured to said shaft, a pair of oppositely-facing pawls capable of alternately engaging said ratchet, and a lever mounted on said shaft and provided with a pair of arms to engage and operate said pawls in alternation during the rotation of said shaft by said handle.

5. In a machine'of the character specified, the combination, with a driving part; of a device for manually operating said driving pa rt comprising a shaft, and a handle therefor; and a full-stroke device associated with said driving part and comprising a toothed, reciprocating member secured to said shaft, a pair of pawls cooperating with said member, one in each direction of movement thereof, and a controller pivoted on said shaft for operation thereby and acting to operation of said manuahdevice.

6. In a machine of the character specified, the combination, with a driving part; of a device for manually operating said driving part, comprising a shaft, and a handle therefor; and a full-stroke device associated with said driving part and comprising a ratchet secured to said shaft, a pairof op+ positely-facing pawls engageable with said ratchet, and a controller mounted on said shaft for operation by the same, but having lost motion with relation thereto, said controller provided with a pair of oppositely-projecting arms arranged to engage and operate said pawls in alternation durcomprising a ratchet secured to said shaft,

a pair of oppositely-facing pawls engageable wlth said ratchet, and a controller for operating said pawls in alternation loosely mounted on said shaft, said ratchet having a pair of promotions thereon arranged to engage said controller in alternation during the opposite movements of the ratchet, to rock the same alternately in opposite directions.

8. In a machine of the character specified, the combination, with a driving part; of a device for manually operating said driving part, comprising a reciprocatory shaft, and a handle therefor; and a full-stroke deviceassoclated with said driving part and comprising a ratchet secured to said shaft, a pa1'r of oppositely-facing pawls engageable with said ratchet, and a two-armed controller for operating said pawls in alternation loosely mounted on said shaft; each arm of the controller having a shifting member thereon, and said ratchet having a pair of PI'OJGCtiOIlS arranged to engage said shiftlng members in alternation during the movements of the ratchet, to rock said controller alternately in opposite directions; said shifting members being adjustable to vary the relatlve timing of their engagement by said projections.

9. In a machine of the character specified, the combination, with a driving part; of a devlce for manually operating said drivng part; a motor for automatically operating said drivmg part; a full-stroke device associated with said driving part, and eflectlve at the operation of said manual device;

gearing driven by said motor and adapted for connection with said driving part, to

actuate the same; a carrier for said gear ing movable into and out of position to effect such connectlon; a lever for disabling said full-stroke device; and a pendent connected to operate said lever and arranged in the path of said carrier, to be" operated by the latter during its connecting movement.

10. In a machine of the character specified, the combination, with a driving part; of a device for manually operating said .drivingpart; and a full-stroke device associated with said driving part and comprising a ratchet, a pair of oppositely-fac ing pawls capable of alternately engaging said ratchet, a pivotally-mounted lever provided with a pair of arms to engage and operate said pawls in alternation during the o eration of said manual device, said lever aving a pair of notches in one end thereof, an

a spring-controlled device en- 'gageable with said notches in alternation;

1 1. In a machine of the character speci: fied, the combination, with a driving part; of a device for manually operating said driving part; a'fnll-stroke device a$ociated with said driving part and comprising a ratchet, a pair of oppositely-facing pawls engageable with said ratchet, each pawl having a painof projections thereon, and a controller having a pair of arms, each arm arranged to engage one of the projectionson the adjacent pawl, so as to operate said pawls in alternation; controlling means for alternately connecting or disconnecting said motor with-orfrom said driving part; and a lever arranged to engage the other projections on said pawls consequent upon the connection of the motor, for lifting both pawls out of the sphere of action of said controller.

FREDERICK. A. HART.

Witnesses PAUL ZIRON, B. Gownmic.