US964638A - Type-writing machine. - Google Patents

Description

G. GABRIELSON TYPE WRITING MACHINE.

- APPLICATION FILED MAY 14, 1904 964,638., Patented July 19, 1910.

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c. GABRIELSON. TYPE WRITING MACHINE. APPLIGATION FILED MAY 14, 1904.

Patented July 19', 1910;

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CARL GABlRIEiBSON, SYRACUSE, NEW YORK, ASSIGNOR T0 L. C. SMITH ,AND BROS. TYPEWRITER COMPANY, OF SYRACUSE, NEW YORK, A CORPORATION 0E NEW YORK.

TYPE-WBJITING- MACHINE.

To all whomit may concern.

Be it known that I, EARL 'GABRIELSON, a citizen of the United States, and. residing at Syracuse, county of Onondaga, and.- State of New York, have inventedxcertain new and useful Improvements in Type-Writing Machines, of which the following is a specificae tion.

The present invention relates particularly to the mechanism for locking the'key-levers of a typewriter at the end of a line, to pre vent making additional impressions over the 7, last letter of a line after the carriage has stopped. This mechanism in typewriting machines is usually called line-locking mechanism.

The invention will be described-in the fol.- lowing specification, reference being had to the accompanying drawings, in which,

Figure 1 is a front View of the line-locking mechanism; Fig. 2 is a top plan view of the universal bar, the locking bar and its supporting brackets, and the stop for the locking bar; Fig. 3 is a side elevation of the linelocking mechanism, some parts of the machinebeing shown in section; Fig. 4 is asection on the line AA of Fig. 1; and Fig. 5 is a detail. g

Referring to the drawing, 1 indicates the universal bar, which is segmental in form and preferably of channel section which renders it light and rigid. In order to further stiffen the universal bar and support it in such manner that all parts of the bar will move rearwardly in parallel relation, when acted upon by any of the sub-levers 2, which operate the type-bars 3, bracket arms or cars 1 are rigidly secured to the bar near its ends, and project rearwardly therefrom, and these arms are pivotally connected to the ends of a pair of rocker arms 5-of a rock-shaft 6, the latter having its ends journaled upon bearings 7 mounted in brackets 8 which are secured to the base 9 at opposite sides of the machine. A bracket arm 10, secured to the central portion of' the universal bar and longer than.the arms 4, projects rearwardly.

and upwardly and is plvotally connected to a rocken arm 11 secured upon a rock-shaft 12, arrangedqiarallel with and in the rearof the rock-shaft 6 and journaled upon bearingsl3 inthe brackets 8. A. rearward enter sion 10 ofthe bracket 10, is connected to Speeiflcationof Letters latent. Patentgq July 19', 191%, Application filed Hay 14, 19.94. Serial No. 207,982 I the escapement rocker 14, and the-spring 15 holds the rocker and the universal. bar normally inforward position. As shown, the rod or extension. 10 is-connected to the rocker 14: by an adjustable stud Lil-threaded intothe rocker and having a forkedend: can

rying a roller 17 which engages arecess 10 in the extension 10. The rear ends oi the arms 4; are faced ofl? parallel with the-universal bar, forming steps 18, and the central arm 10 has an upward projection, u on whichis formed a. stop 19 preferably in. 'no

with the stops 18, and a rest or-step 20in The locking bar is normally held. out of the path of the stops'l8 and 19 by thever'tical arm of a bell-crank lever 25,,which engages an arm or projection 21 on the end of the locking bar. The lever 25. has a U-shaped portion 25* (Figs. 1 and 5) which is pivoted on a pin 26, which extends through the branches of a U-shaped bracket 27, suitably connected with the frame of the machine.

A spring28, coiled about the pin 26,- tends to throw the vertical arm of lever 25 rearward and normally holds the locking bar 21 against a stop 29 (l igs. 1 and 3). A screw 30, passing through a slot-in the piece carrying the stop 29, connects said stop adjustably with one of the brackets 22,. as shown in Fig. 1. The horizontal arm of lever 25 has a portion 25 adjustably connected to a portion 25, for the purpose of regulating the movement of the locking bar 21, the two parts being connected by a screw passing through aslot in one and threaded into the other. The pivot pin 26 passes through both parts 25 and 25. rocked to permit the locking bar 21 to drop by gravity into position to engag the stops 35 has a slot 35, in which is a pin 34 proloo .machine and'it is provided with forwardly extending arms carrying the margin bar 3%).

Upon the margin rack 39 is arranged an adjustable margin stop 40 having two cam surfaces a0 and 40 which are adapted to be engaged successively by a stop 41 upon the back bar 42 of the carriage, as the carriage nears its left-hand position at the completion of a line or print. \Vhen the stop all engages the inclined surface 40", the rack bar will be tilted suiliciently to cause the bell to sound, (by connections not necessary to illustrate herein); but, on account of the lost motion between the rod and the pin ea upon the bell crank lever 25, this slight movement of the rack bar will not cause the operation of the line-locking devices. After the bell has been rung, the further movement of the carriage to the left brings the pivotal carriage stop all into engagement with the incline all), which is deeper than the incline and the rack bar is therefore tilted to such an extent as to cause the rod to move the-bell crank lever 25 and permit the locking bar 21 to drop onto the rest or step 20 behind the shoulders 18 and 19'of the universal bar. The further operation of the escapemen't mechanism, type-bars, and the universal bar are thus prevented. The carriage is then arrested by i the engagement of the stop etl with a shoulder 4:0 at the end of the incline 40' on the margin stop, the carriage stop 4L resting against a pin 43 secured to a bracket 44 upon the back bar of the carriage, as indicated in dotted lines, Fig. 1.

When it is desired to print beyond the right-hand margin for which the margin stop is set, (the stop 40 being adjustable on the margin bar 39) the margin bar may be raised by means 01 a key (not shown), thus allowing the carriage stop al to be rocked into its normal position, shown in full lines in Fig. 1, by its spring lf), so as to clear the margin stop, and the rack bar, when the key is released, will drop to normal position, thus raising the rod 35 and allowing the bell crank 25 to be returnedto its normal position by the spring 28. The locking bar will thus be raised out of the path of the stops 18 and 19 and against its stop 29 by the bell crank lever 25.

The line-locking mechanism herein described is capable of use with any system of key-levers, sub-levers and type-bars, but is especially adapted to a front-strike typewriter such as that partially illustrated. The type-bars 3 are arranged to strike upwardly and rearwardly against a platen 50,

indicated in dotted lines in Fig. As shown, the type-bars are connected with the sub-levers 2 by links 51, and the sub-levers are rocked on their pivots 52 by the engage ment of their lower ends with cam surfaces 53 upon the key-levers 54:. The sub-levers are preferably provided with projecting portions 55 which engage the universal bar 1. When the universal bar is locked the sublevers are prevented from rocking on their pivots and the type-bars and key-levers are thus locked.

The adjustable brackets 22, which support the locking bar, permit or the nice adjustment of said-bar to the stops l8 and 19, and the universal bar is thus firmly supported at three points in its length.

If necessary to give it proper rigidity and to etl'ectually lock the keys, additional stops may be used on the universal bar. For convenience the stops l8 and 12) are arranged in a common line, and the locking bar has a straight edge 'to cooperate with them. It

will be evident that the locking bar might be used in various ways to etl'ect the stoppage of the universal bar.

1t is necessary that the devices for bringing the line locking bar into operation should be sensitive and that the locking should take place exactly at the proper time, that is, at the time, or immediately after, the last type impression in the line is formed. The adjustable stop 2!) for the locking bar and the adjustment for the horizontal arm of the elbow lever 25, permit,

delicate adjustment between the margin bar and locking bar, so that by properly adjusting these parts the locking bar is brought into operation exactly at the proper time.

The rocker l l has .a normal position which is determined by the adjustable stop 56 which cooperates with the abutment 57. The position of the universal bar with relation to the rocker can be accurately adjusted by means of the adjustable stud 16. The universal bar must be so adjusted that when it is locked, the sub-levers 2 cannot move suiliciently to throw their respective typebars against the platen.

I claim- 1. In a typewriting machine, a line looking mechanism comprising, in combination, a key lover, a vertically arranged sub-lever, a type bar suitably connected to the sublever, a horizontally movable universal bar operated by the sub-lever, a line locking bar movable into and out of position to engage the universal bar, and means for'moving said line locking bar to intercept the universal bar at the completion of a line, whereby the operation of the type bar and key lever is prevented.

2. In a typewriting machine, a line locking mechanism comprising, in combination, a vertically arranged sub-lever, a horizontally movable universal bar in the path of V the sub-lever, and a line locking bar movable 4. In a line locking mechanism for typewriting machines, the eombinationof a universalv bar, a pivoted line locking bar arranged to engage said universal bar at a plurality of points, and adjustable brackets in which said locking bar pivoted, for the purpose set forth.

In a front strike typewriting machine,

the combination with the universal bar {,av-

ing arms of ditlerent lengths, of. the rockers pivotally connected with said arms and slipporting the bar.

(i. In a typcwritiug machine, the combination with the pivoted line locking bar, of an elbow lever arranged to operate said bar, and means controlled by the movement of the 'arriage for rocking the elbow lever, said elbow lever having an angularly adjustable arm, and/means for holding said arm in any desired zuljustment, for the pur-,

pose set forth.

7. In a typewriting machine, the combina-' tion with a margin bar and margin stop, of the elbow lever 25, the link 35 connecting the margin bar with said lever,. the line locking bar arranged to be operated by said lever, and the universal bar arranged to be locked by said line locking bar.

8. In a typewritingmachine,the combina tion with the margin bar and the rock shaft carrying said bar, of an arm on said rock shaft, a link depending from said arm, an elbow lever operated by said link, and a line locking bar operated by said elbow lever. v

9. In a typewritiug machine, thecombination of the line locking bar, the adjustable stop for said bar, the elbow lever for operat i-ng said locking bar, the adjustable arm on said lever, the link arranged to operate said adjustable arm, and connections between said link and the margin bar.

10. In a ty 'iewriting machine, the combination with the rock shaft, the margin bar carried by saidrock shaft, and the adjustable margin stop carried by said bar, of the pivoted stop on the carriage adapted to move in either direction from its normal po-. sition and provided with a spring for holding it in normal position, the said pivoted stop being adapted to cooperate with the stop on the margin bar, for the purpose set forth. I I

11. In a typewriting machine, the combination with key levers, uprightsub-levers, and connections between said key levers and sub-levers for rocking the latter, of a curved universal bar arranged in proximity to the sub-levers and movable in substantially.

horizontal lines by said sub-levers.

12. In a typewritmg machine, the combination with he levers u ri ht sub-levers and connections between said key levers and sub-levers for rocking the latter, of a curved universal bar adapted to be moved by the sublevers, said ,bar having pivotal supports arranged in different vertical planes. 13. In a typewriting machine, the combination. with key levers, upright sub-levers, and connections between said key levers and sub-levers for rocking the latter, of a curved universal bar and a plurality of rocking arms suppm'ting'said bar, said supporting arms being out of line with each other, whereby the universal bar is prevented from rocking.

14. In a typewriting machine, the combination with key levers, upri ht sub-levers, anal connections btweensaid Key levers and su ,-levers for rocking the latter, of a curved universalbar arranged in an upright plane and adapted to move horizontally and suitable supports for sustaining and guiding said bar.

In testimony whereof I have signed, my name to this specification in the presence of two subscribingwitnesses.

V GAR-L GABRIELSON. .1

Witnesses:

C. M. STEVENS, C. F. PARSONS.

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