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US1837898A - Typewriter - Google Patents

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Publication number
US1837898A
US1837898A US381016A US38101629A US1837898A US 1837898 A US1837898 A US 1837898A US 381016 A US381016 A US 381016A US 38101629 A US38101629 A US 38101629A US 1837898 A US1837898 A US 1837898A
Authority
US
United States
Prior art keywords
stop
lever
carriage
stops
tabular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US381016A
Other languages
English (en)
Inventor
Chester W Crumrine
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ELECTROMATIC TYPEWRITERS Inc
Original Assignee
ELECTROMATIC TYPEWRITERS Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ELECTROMATIC TYPEWRITERS Inc filed Critical ELECTROMATIC TYPEWRITERS Inc
Priority to US381016A priority Critical patent/US1837898A/en
Priority to DE1930557115D priority patent/DE557115C/de
Application granted granted Critical
Publication of US1837898A publication Critical patent/US1837898A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/02—Key actions for specified purposes
    • B41J25/18—Tabulating

Definitions

  • This invention relates to the stop mechanism used to control and to limit the traversing movements of the carriage of a typewriting machine.
  • Such mechanism usually performs three functions: It limits the extreme normal movements of the carriage, for the purpose of preserving the desired margins; it assists in tabulating, being operated to release the carriage and then to arrest it automatically in a predetermined intermediate position; and it acts to limit rebound of the carriage when arrested in the performance of the tabulating operation' I
  • the general object of the invention is to produce a typewriter in which some or all of these functions are performed by simple mechanism, in a reliable manner, and with provision for absorbing the shock produced by the impact of the stop members.
  • More specifically one object is to reduce the number of parts required for the performance of the several functions just mentioned, and to this end it is proposed to use a single stationary stop member, preferably in the form of a lever, which is adaptedto cooperate both with the margin stops and with the tabular stops carried by the carriage, and which is mounted for movement in several directions, so that it may be thrown into and out of the path of Y each of these stops, and also, preferably, so
  • Tabular stops may be arranged to operate in either of two well known ways.
  • the more usual arrangement is to have the stationary stop member moved into the path of the stop on the carriage, and then held there, by means of the tabular key until the carriage has been arrested, the key then being released by the operator.
  • the rebound check may be a simple latch, mounted on the stationary stop member and moved into and out of operative position therewith.
  • the second described mode of operation of the tabular stop is used, and the difficulty in the matter of the rebound check is removed by supporting the check not upon the stop but upon the'frame of the machine, and by so co-ordinating the rebound check and the stationary' stop that the check is maintained in operative position until the stop has returned fully to normal position. In this manner the time during which the check is effective is lengthened sufficiently to insure its correct operation.
  • Fig. 1 is a rear elevation of the parts of a typewriting machine particularly embodying the present invention.
  • Fig. 2 is a plan view of a portion of the mechanism shown in Fig. 1.
  • Fi 3 is a detail plan view, showing particular y the mode of operation of the rebound check, with the parts in a different position from that shown in Fig. 2.
  • Fig. 4 is a side elevation, partly in section, looking from right to left with respect to Fig. 1.
  • Fig. 6 is a detail plan view, showing particularly the carriage-escapement mechanism.
  • the carriage is shown as provided with escapement mechanism which is somewhat novei in form, but which constitutes no part of the present invention, this mechanism being shown merely to indicate its necessary interconnection with the tabular-stop mechanism.
  • the escapement mechanism comprises a rack 21, fixed to the bottom of the carriage and having teeth which are spaced at a distance equal to twice the length of a single carriage-feeding movement.
  • Two pawls 22 cooperate with this rack, and are arranged to be released alternately by means of a lever 23, carried by a stationary pivot 24 and actuated by a rod 25.
  • This rod may be connected with any of the usual means for operating the escapement, such, for example, as a space key and a universal.
  • the escapement mechanism need not be further described, except to point out that the pawls are mounted on a pivot 26, so that they may both be swung simultaneously out of engagement with the rack to release the carriage.
  • a member in the use of which the present invention largerly resides is shown as having the form of a lever 27, which is connected,
  • the lever 27 hereinafter called the stop lever or stop member, is arranged to cooperate both with the margin stops and with the tabular stops, and to be swung in the directions necessary to throw into and out of the paths of these stops.
  • the bullet lever 29 is mounted on a pivot 30, supported in stationary position. In order to introduce a slight degree of yield pr spring to such support, the pivot is fixed in a member 31 of goose-neck form, of which one end is fastened rigidly to the rail 10 by means of a screw 32, while the other end is left free to move slightly, in consequence of springing in the metal.
  • the pivot 30 is surrounded by a spring 33, which bears against the buffer lever, and this arrangement permits the lever not only to swing about the horizontal axis of the pivot, but also to have a slight rocking movement around a vertical axis.
  • the spring tends, however, to press the lever flat against the face of the gooseneck 31, so as to resist the last mentioned movement and to return the lever to normal position when released.
  • a spring 34 connects the lower end of the buffer lever with a pin directly beneath it, on a member 35 of the frame of the machine, and the downward pull of the spring tends to hold the lever in the position shown in Fig. 1.
  • the buffer lever is also provided with two lateral lugs 36, which cooperate with cushions 37 carried by a bracket 38, which is also mounted on the frame member 35.
  • the cushions 37 may be made of any material sufliciently yielding to avoid noise when struck by the lugs 36, and they serve to limit the movements of the bufi'er lever.
  • the stop lever 27 is provided, at its left hand end, with a horizontal lug 39, which lies normally in the path of movement of the margin stops 18 and 19. It is provided also with a vertical lug 40, adapted to cooperate with the tabular stops 20, but lying normally in front of the path of movement of these stops, so as not to interfere with the normal carriage-feeding movements.
  • the lug 39 may be thrown out of the path of the margin stops when a margin-releasing operation is desired, or the lug 40 may be thrown into the path of the tabular stops when a tabulating operation is de sired.
  • the right-handend of the stop lever extends rearwardly and downwardly, as shown in Figs. 1 and 5, and is provided with an elongated opening 41, which is engaged by the upper end of a trip lever 42.
  • This lever is connected, at its lower end, by means of a pivot 43, with a bell-crank lever A, and the latter lever is pivoted at 45 on a bracket 46, fixed to the bottom of the rail 10.
  • This same bracket is conveniently used also for the support of the pivot stud 24, hereinbefore refered to.
  • the hole 41 is of such length that the lever 42 does not interfere with the lengthwise yielding movement of the stop lever, but by rocking movements of the levers l2 and 44 the stop lever may be swung either vertically or horizontally.
  • a horizontal swinging movement of the stop lever, just described, is that which throws its lug 40 into thepath of the tabular stops 20.
  • the vertical swinging movement of the stop lever, about the pivot 28, is produced by rocking t he bell-crank lever 44 upon its pivot 45 in a clockwise direction, soas to raise the lever 42 bodily, and thus raise the right-hand end and lower the left-hand end of the stop lever.;
  • This movement carries the lug 39 on the stop leverdownwardly, out of the path of the margin stops.
  • the movement in quesby tripping the esca tion is caused b a thrust rod 48 engaging the lower arm of t e lever'44, and it will be understood that this rod may be actuated by any means, manual or otherwise, for the purpose of producing a margin release.
  • T he spring 49 acts also to return the levers 42 and 44 to normal positionafter a margin-release opera- I tion, and thus to return the stop lever to the stop lever, and it has IStlSO a portion 53 depending in the rear of the rail and integral with a portion 54, which extends under the ment pawls.
  • This detent has three arms 58, 59 and 60, and it is controlled by a spring 62, of which one end engages the detent while the other end rests against a pin 61 on the rail 10.
  • the arm cooperates with the same pin to limit the movement of the detent in one direction.
  • the arm 58 cooperates with a lug 64 depending from the stop'lever. In the normal posi tion of the parts, as shown in Fig. 2, the lug 64 rests against the side of the arm 58, thus holding thedetent in a position in which the arm 60 is out of engagement with the pin 61.
  • the rebound check by which the carriage is prevented from rebounding to an undesired extent after it has been arrested in a tabulating operation, has the form of a latch 63 pivoted, at 65, on the frame of the machine and rovided with a beveled nose 66 which lies 1n the path of movement, of the tabular stops.
  • a spring 69 normally holds the latch in this position, but the latch may normally be swung therefrom without substantial resistance to, permit the tabular stops to pass freely in either direction. Conse- 64.
  • the detent then retains the stop lever in tabulating posiquently, when one of the tabular stops is in operationit moves past the latch, which immediately swings back into position behind it, and the'tabular stop then engages the lug 40 on the stop lever, as before described.
  • the resulting movement of the detent 56 also before described, brings the arm 59 of the detent into engagement with the latch 63, as shown in Fig. 3, so that upon the slight return movement of the carriage, due to the return of the buffer lever 29 to normal position,
  • a typewriter the combination, with a carriage provided with a margin stop and a tabular stop, of a stop lever adapted to cooperate, at one end, with each of said stops, means supporting said lever in a position substantially parallel with the length of the carriage and with freedom for pivotal motion in two planes, and means for swinging the stop lever in one of said planes, to throw it into or out of the path of one of said stops,
  • the combination with a carriage provided with a margin stop and a tabular stop, of a stop member having portions adapted to cooperate with each of said stops, means supporting the stop member movably, and means for moving the stop member to shift one of said portions vertically into and out of the path of one of said stops and for moving it in another plane to shift the other of said portions into and out of the path of the other stop.
  • a typewriter, t e combination with a carriage provided with a margin stop and a tabular stop, of a buffer lever lying in a vertical plane, a support, for said lever, upon which it is pivoted between its ends, the pivotal support affording freedom for a partial rotation of the lever about axes both normal. to and lying in said plane, a stop lever pivoted, at an intermediate point, upon one arm.
  • the combination with a carriage provided with a margin stop and. a tabular stop, of a stop lever pivotally mounted to swing, in oneplane, into and out of the path of one of said stops and to swing, in another plane, into and out of the path of the other stop, and means, for so swinging the stop lever, comprising a first shifting lever of which one end engages the stop lever, a second shifting lever on which the first shifting lever is pivoted, means for rocking the first shifting lever upon its pivot to swing; the stop lever in one plane, and means for rocking the second shifting lever to impartlengthwise movement to the first shiftin lever and thus swing the stop lever in the other of its lanes of movement.
  • a stop member movable into and out of the path of saidstop, spring means tending to move it out of said path, a rebound check movably mounted adjacent .said path and having a portion normally lying therein but yieldable to permit free passage of the stop in either direction, a spring-controlled detent cooperative with both the stop member and the rebound check, the detent tending to move, when the stop member is thrown into the path of the stop, into position to retain the stop member in said path, and to lock the rebound 'check against yielding to return movement of the stop, and resilient means supporting the stop member with freedom fora limited yielding movement when struck by the stop, such yielding movement causing the stop member to release itself from the detent and return to position out of the path of the stop, and the stop member and the detent having cooperating portions by which such return of the stop member moves and also in a direction to yield under the impact of the stop and spring means tending to return the sto member from such yielding movementand a so to move it out of the path' of the stop, of
  • a typewriter the combination with a frame, a carriage movable thereon, of tabular stops on the carriage, escapement devices comprlsing a rack and a pawl cooperating therewith, a stop member pivoted on the frame and normally arranged in the direction in which the carriage moves, means for moving the stop member about a vertical axis into the path of the tabular stop, and a lever arranged in the path of the stop member and adapted to be moved thereby into engagement with said pawl to move the pawl out of engagement with the rack to render the escapement devices inoperative.

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  • Accessory Devices And Overall Control Thereof (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
US381016A 1929-07-25 1929-07-25 Typewriter Expired - Lifetime US1837898A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US381016A US1837898A (en) 1929-07-25 1929-07-25 Typewriter
DE1930557115D DE557115C (de) 1929-07-25 1930-03-26 Steuervorrichtung fuer die Wagenbewegung von Schreibmaschinen u. dgl.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US381016A US1837898A (en) 1929-07-25 1929-07-25 Typewriter

Publications (1)

Publication Number Publication Date
US1837898A true US1837898A (en) 1931-12-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
US381016A Expired - Lifetime US1837898A (en) 1929-07-25 1929-07-25 Typewriter

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US (1) US1837898A (de)
DE (1) DE557115C (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2558413A (en) * 1948-12-30 1951-06-26 Underwood Corp Carriage rebound checking device
DE910543C (de) * 1950-06-21 1954-05-03 Fritz Kunze Vorrichtung zum Verstellen des Papierwagens gegenueber der Zahnstange an Schreibmaschinen
US2699893A (en) * 1950-04-01 1955-01-18 Burroughs Corp Function control change mechanism
US2877881A (en) * 1950-04-01 1959-03-17 Burroughs Corp Tabulating mechanism for printing business machines
US2904159A (en) * 1955-11-04 1959-09-15 Smathers James Fields Proportional spacing mechanism for typewriters

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2558413A (en) * 1948-12-30 1951-06-26 Underwood Corp Carriage rebound checking device
US2699893A (en) * 1950-04-01 1955-01-18 Burroughs Corp Function control change mechanism
US2877881A (en) * 1950-04-01 1959-03-17 Burroughs Corp Tabulating mechanism for printing business machines
DE910543C (de) * 1950-06-21 1954-05-03 Fritz Kunze Vorrichtung zum Verstellen des Papierwagens gegenueber der Zahnstange an Schreibmaschinen
US2904159A (en) * 1955-11-04 1959-09-15 Smathers James Fields Proportional spacing mechanism for typewriters

Also Published As

Publication number Publication date
DE557115C (de) 1932-08-18

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