US1873512A - Typewriting machine - Google Patents

Typewriting machine Download PDF

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Publication number
US1873512A
US1873512A US556096A US55609631A US1873512A US 1873512 A US1873512 A US 1873512A US 556096 A US556096 A US 556096A US 55609631 A US55609631 A US 55609631A US 1873512 A US1873512 A US 1873512A
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United States
Prior art keywords
lever
carriage
escapement
cam
arm
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Expired - Lifetime
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US556096A
Inventor
Russell G Thompson
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ELECTROMATIC TYPEWRITERS Inc
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ELECTROMATIC TYPEWRITERS Inc
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Priority to US556096A priority Critical patent/US1873512A/en
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Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J19/00Character- or line-spacing mechanisms
    • B41J19/18Character-spacing or back-spacing mechanisms; Carriage return or release devices therefor

Description

a sheets-sheet -1 1932' R. G. THOMPSON TYPEWRITING MACHINE Filed Aug. 10. 1931 I I v INVENTOR & RUSSELL a. THaMPso/v. W
ATTORNEY Aug 23, 1932. R. G. THOMPSON 1,873,512
TYPE-WRITING MACHINE Filed Aug. 10. 1951 s Sheets-Sheet 2 INVEN'fOR RUSSELL a. THOMPSON M ATTORNEY A 8. 23, 1932. H R THOMPsbN 1,873,512
TYIIEWRITING MACHINE Filed Aug. 10, 1951 3 Sheets-Sheet 5 INVENTOR U555 LL 6. THOMPSON ATTORNEY Patented Aug. 23, .1932
TUNE-TED sTaTes PATENT orsice RUSSELL G. THOMPSON, OF ROCHESTER, NEW YORK, ASSIGNOR TO ELECTROMATIC TYPE- WRITERS, INC., OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK TYPEWBITING MACHINE Application filed August 10, 1931. Serial No. 556,096.
This invention relates to improvements in typewriting machines, and has for its principal object the provision of simple and inexpensive means for automatically actuating the escapement devices at certain selected points in the traverse of the carriage for letter spacing for the purpose of arranging letters, figures or other written matter in vertical columns on the written page.
Another object of the invention is the provision of an escapement lever for actuating the escapement devices and means adapted to be arranged in certain selected positions on the carriage for automatically actuating said escapement lever, so that certain selected columns will be left blank on the printed page.
To these and other ends, the invention consists in the construction and arrangement of parts that will appear from the following description when read in conjunction with the accompanying drawings, the novel features being pointed out in the claims at the end of the specification.
In the drawings:
Fig. 1 is a vertical transverse section of a typewriting machine illustrating one possible embodiment of the invention;
Fig. 2 is a fragmentary rear elevation of a portion of th left end of the carriage and a portion of the frame on which cooperating parts are mounted;
Fig. 3 is an inverted plan view of the same;
Fig. 4 is a view similar to Fig. 2 illustratingi a slightly modified form of construction, an
Fig. 5 is an inverted plan view of the devices shown in Fig. 4.
Referring particularly to the drawings, the invention is illustrated therein applied to a power driven typewriting machine of well known type, although it will be understood that its use is not limited to such machines. Said machine comprises a type bar 1, having types 2 and pivoted in a type basket 3 for movement to and from printing engagement with a platen 4. A toggle lever 5 is pivoted to the type bar and has one arm pivoted to a toggle arm 6 pivoted on a fixed part and its other arm operatively connected with one arm of a bell crank lever 7 by means of the link 8. The bell crank 7 is pivotally mounted on the common pivot rod 8 and is resiliently retained in normal position with the type bar retracted by means of the spring 9. The other arm of the bell crank lever 7 is connected with an arm of a power operated lever 11 by means of a link 12. The other arm of'the lever 11 projects downwardly adjacent a power driven roller 13 and has a cam 14 revolubly mounted thereon. The cam 14 is normally out of engagement with the power driven roller but is resiliently urged int-0 engagement therewith by means of a springpressed arm 15 pivoted on the lever 11 and engaging a lug or projection 16 on the cam. The cam is held against the action of said spring-pressed arm by means of a stop 17 on the lower end of a lever 18 pivoted on the lever 11, which engages a projection 19 on the cam. At its upper end, the lever 18 is offset laterally for cooperation with the slotted lower end of an arm 21 projecting downwardly from a key lever pivoted on the common pivot rod 8 and having a key 20 whereby it may be manually operated.
The platen is mounted in a carriage 22, movable transversely for letter and word spacing onantifriction rollers 28 mounted in.
ways on the carriage and guide rails 24 on the frame. A spring drum 25 resiliently urges the carriage in the direction of letter space movement, which movement is controlled by usual escapement devices comprising a pair of pawls 26 and 27 which alternately engagea rack 28 mounted on the carriage. An escapement lever 29 is pivoted on a fixed part and arranged to engage one or the other of the pawls and disengage it from the rack to release the carriage for letter or word spacing. The lever 29 is automatically actuated when a type bar is moved into engagement with the platen by Ineansof a universal bar 31 mounted on the type basket and resiliently urged into the path of the type bars. A link 32 operatively connects the lever 29 with the universal bar to be actuated thereby. The lever 29 may also be operated independently of the universal bar by key controlled means. To this end, a lever 33 is pivoted on a fixed part and arranged to engage and operate the escapement lever. A spring 34 connects the lever 33 with a fixed part and resiliently retains the lever in retracted position. A link 35 connects one arm'of the lever 33 with an arm of a lever 36 pivotally mounted on the common pivot rod 8. The other arm of the lever 36 is connected with a' power operated lever 37 having a cam 38 mounted thereon. The lever 37, cam 38 and other parts mounted thereon for controlling the cam are similar to those on the lever'll except that they are right and left. The lever 39which controls the cam 38 is operated by a lever 41 having a space bar 42 connected therewith and arranged at the front of the key board. Al
v though only one type bar and means for operating it are shown in the drawings, it will be understood that the usual number of type bars and operating means therefor are or may be employed.
The parts thus far described are or may be of usual construction. In some bookkeeping and tubulating work, it is desirable to provide one or more blank vertical columns on the printed. page. To this end, means are provided for automatically actuating the escapement lever. at one or more selected points in the traverse of the carriage so that the carria e automatically moves over said points an noprinted matter can appear thereini In the embodiment illustrated in Figs. 1, 2 and 3, said means comprises a lever 43 pivoted on a fixed part of the frame and having one arm connected with the space lever 41 by means of a link 44 which is operatively connected with a second link 45'connected at one end with the space lever 41. The lever 43 has an arm 46 arranged, normally in the direction of the carriage movement and adjacent to the stop bar 47 on the carriage. Pivoted on the arm 46 at or adjacent its end is a can! member 48'arranged in the path of a stop 49 adjustably mounted on .the rack 47. The cam 48 .is're siliently engaged with a shoulder on the arm 46 by means of the spring 51 and has an inclined surface which. is engaged by the carriage stop which moves the cam 48 out of its path and in so doing swings the lever 43 to operate the space lever 41 through thelink 45 to operate the Y escapement devices to feed the carriage.
When the carriage moves in the reverse direction, the stop 49 engages the opposite side of the cam member 48 and swings'it idly on the arm 46 against the tension of its spring 51 and no movement is imparted to the lever 43 orthe parts controlled thereby.
stop 49 adjustably mounted on the rack 47. The arm 54 and cam 55 mounted thereon are similar in construction to the arm 46 and cam 48 mounted thereon and described above. When the stop 49 engages the cam 55 and swings the lever 52, its arm 53 swings the escapement lever 29 into engagement with the pawl 27 to disengage it from the rack to permit the carriage to move forward one space distance until engaged and stopped by the other pawl 26. 1
Although only two embodiments of the invention are shown and described herein, t will be understood that this application is intended to cover such changesor modifica tions as come within the spirit of the invention or scope of the following claims.
I claim:
1.In a typewriting machine, the combination of a frame, a carriage movable thereon, escapement devices for moving the carri age step by step for letter spacing, and means controlled by the movement of the carriage for automatically actuating the escapement devices to move the carriage.
.2. In a typewriting machine, the combination ofa frame, a carriage movable thereon, escapement. devices for moving the carriage step by step for letter spacing comprising an escapement lever, a universal bar operatively connected .with said lever forv actuating the same, and separate means controlled automatically by the movement of the carriage for actuating the escapement lever.
"3. In a typewriting machine, the combination ofa frame, a carriage movable-thereon,
escapement dvices for moving the carriage means for actuating the escapement lever,
and meansautomatically controlled by the movement of the carriage for actuating said manually controlled means.
4. In a typewriting machine, the combination of a frame, a carriage movable thereon, escapement devices for moving the carriage step by step for letter spacing comprising .an
escapement lever, a manually controlled lever escapement lever, a space bar, means 'con-" trolled by said space bar for actuating said escapement lever, ,a lever operatively con-- nected with said space bar, and means on the carriage for automatically actuating said last mentioned lever. v f
6. In a typewriting machine, the combination of a frame, a carriage movable there on, escapement devices for moving the car step by step for letter spacing comprising an escapement lever, manually controlled riage step by step for letter spacing comprising an escapement lever, a space bar means controlled by said space bar for actu ating said escapement lever, a lever operatively connected with said space bar, a stop adjustably mounted on the carriage, and a cam on said lever in the path of said stop. 7. a typewriting machine, the combination of a frame, a carriage movable thereon, escapement devices for moving the carriage step by step for letter spacing com-' prising an escapement lever, a space bar, means controlled by said space bar for actuating said esca ment lever, a lever operatively connecte with said space bar, a cam pivoted on said lever, and means arranged on the carriage to engage said cam and operate the lever when the carriage moves n letter space direction and to swing the cam on the lever out of its path when the carriage moves in the other direction. 8. In a typewriting machine, the combination of a frame, a carriage movable thereon, escapement devices for moving the carriage step by step for letter spacing comprising an escapement lever, a lever operable to actu- 7 ate the escapement lever, a stop adjustably mounted on the carriage, and a cam arranged on said lever in the path of said stop. i 9. In a typewriting machine, the combination of a frame, a carriage movable thereon, escapement devices for moving the carriage step by step for letter spacing comprising an escapement lever, a lever operable to actu- I 3:; ate the escapement lever, a stop adjustably mounted on the carriage, a cam pivotally mounted on said lever in the path of Said stop and operable to swing the lever to operate the escapement lever when the carriage moves in letter space direction, and yielding means for projecting the cam into the path of said stop so that the cam yields out of its path when the carriage moves in the reverse direction.
In witness whereof, I have hereunto signed my name.
RUSSELL e. momsoit
US556096A 1931-08-10 1931-08-10 Typewriting machine Expired - Lifetime US1873512A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2439497A (en) * 1945-05-12 1948-04-13 Ibm Carriage spacing means for signalcontrolled printing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2439497A (en) * 1945-05-12 1948-04-13 Ibm Carriage spacing means for signalcontrolled printing apparatus

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