US1949436A

US1949436A - Margin stop

Info

Publication number: US1949436A
Application number: US617943A
Authority: US
Inventors: Frank H Trego
Original assignee: COXHEAD RALPH C CORP
Current assignee: COXHEAD RALPH C CORP; RALPH C COXHEAD Corp
Priority date: 1930-03-22
Filing date: 1932-06-18
Publication date: 1934-03-06
Anticipated expiration: 1951-03-06

Description

March 6, 1934. F Hl TREGO 1,949,436

MARGIN STOP Original Filed March 22, 1930 2 Sheets-Sheet 1 INVENTOR Fran/r H. frego.

27% ATTORNEY March 6, 1934. F, H. TREGO 1,949,436

' MARGIN STOP Original Filed March 22, 1930 2 Sheets-Sheet 2 INVENTOR Frank H4 Trag@ ATTORNEY Patented Mar. 6, 1934 UNITED `STATES PATENT GFFICE MARGIN STOP Delaware Original application March 22, 1930, Serial No. 437,974. 'Divided and this application June 18,

1932, Serial No. 617,943

claims. (ci. 1er-7o) This invention is a division of my application, Serial No. 437,974, led Mar..22, 1930. It relates to typewriting vmachines andmore particularly to margin stops therefor.

L5 Features of the invention relate to novel construction of the margin stops.

Other features .and advantages will hereinafter appear.

In the drawings, l

Fig. 1 is a sectional side View of a portion of the machine showing the invention applied thereto;

Fig. 2 is a sectional rear View of the machine taken on the line 2--2 of Fig. 1;

Fig. 3 is a detail rear View, on a larger scale, of the right-hand margin-stopand showing the stop released. from the stop bar to permit setting it along the bar;

Fig. 4 is a sectional side view taken on the line 4-4 of Fig. 5;

Fig. 5 is a front view o-i the right-hand margin- A stop on the stop-bar;

Fig. 6 is a view similar to Fig. 3 showing the stop connected to the stop-bar;

Fig. '7 is a sectional view of the margin-stop taken on the line 7-7 of Fig. 6;

Fig. 3 is a developed view of the kind of blank from which the bodies of both right-hand and left-hand margin-stops are formed;

Fig. 9 shows the blank bent to form the body of one of the margin-stops;

Fig. 10 is a similar view showing the blank bent to form the other margin-stop;

Fig. 11 is a view of the pawl used in either margin-stop;

Fig. 12 is a View of the blank from which the pawl operating lever of eithermargin-stop may be formed; i

Fig. 13 shows the lever blank bent for use in one of the margin-stops; and

Fig. 14 shows the lever blank bent for use in the other margin-stop.

Similar reference characters represent similar parts throughout the several views.-

The invention is herein illustrated as applied to a Varityper writing machine which includes a main-frame 15 having secured thereto a rail 16 upon which is supported a carriage 17, having a bar 17a, to travel back and forth through the medium of anti-friction balls or rollers 18 located between the rail 16 and the bar 17a.

The carriage is urged in a letter space direction (rightwardly in` Fig; 2) by a spring drum, not Y shown, connected to the carriage 17 by a strap 20; The letter space movements of the carriage are controlled by escapement including a pinion 22 engaging a rack 23 on said carriage.

The carriage is provided with the usual feed rollers 32 and 33 by which a work sheet 34 is fed upwardly with reference to the printing instrumentalities, not shown. The carriage further includes end pieces 36, connected to each other by a guide bar 37, and a margin-stop bar 33;y the latter being attached to said end pieces by screws 39.

Two margin-

stops

40 and 41 are supported on the stop-bar 33 and co-operate with an abutment 42 supported on the machine frame 15 in a manner hereinafter described. The stop 40 at the right-hand side of the rear View (Fig. 2) determines the margin at the left-hand end of the work sheet and consequently will hereinafter be referred to as the left-hand margin-stop; the other stop 41 will be referred to as the righthand margin-stop.

The abutment 42 is supported on a bar 43 which is herein supported for lateral movement, for a purpose hereinafter described, on the mainframe 15 by shouldered screws 43*3L threadedL into posts 45 on a base plate 45a of the mainframe; the screws 43EL passing through slots43D in the bar 43; the bar 43 being normally held against the Shanks of the screws 43a as shown in Fig. 3, by a spring 44.

When the carriage is returned to begin a new line it is moved letwardly in Fig. 2 until a projection 46 of the stop 40 engages the abutment 42.

As the typing proceeds the carriage travels in the opposite direction (rightwardly in Fig. 2). When the carriage approaches the end of the line, a bell, not shown, is sounded to inform the typist that the end of the line is near. Subsequently the key-levers, not shown, are locked against actuation.

After the bell has been sounded, several characters may vyet be typed and then, as the border of the right-hand margin end of the line is reached, the key-levers are automatically locked to temporarily prevent further typing. This locking of the keys is effected by a projection 48 of the right-hand margin-stop 41 engaging the abutment 42 to slide the bar 43 rightwardly in Fig. 2, thus carrying an obstructing element into the path of a cross-bar of the universal bar frame (not shown) thus locking the universal bar to prevent the operation of the key-levers, the locking of the universal bar being effected within a single letter space movement of the carnage.

Line lock releasing mechanism is provided to permit, if desired, a few characters to be typed in the right-hand margin of the work sheet after the carriage has been locked at the border of said margin. This mechanism includes a margin key operated lever having thereon a roller 74 engaging in a slot of a release lever 76, so that when said lever moves upwardly it swings the release lever 76 in a counter-clockwise direction (Fig. 2) to withdraw the abutment 42 from the path of the projection 48 of the margin-stop 41 against the action of a spring 78; connection between the release lever 76 and the abutment 42 comprising a stud 79 extending from the abutment into a slot of said release lever. As soon as the abutment is released the locking bar 43 is returned to normal, by the spring 44 connected to the release lever 76, thus releasing the carriage and carrying the abutment under the projection 48 of the margin-stop, and also carrying the obstructing pawl 60 out of the path of the cross-bar 61 to unlock the key-lever so that the few additional characters may be typed in the right-hand margin.

By an inspection of the drawings it will be seen that the stop-bar 38 and the

stops

40 and 41 are located at the front of the carriage where the stop may be readily reached for adjustment.

The margin-stops 40 and 4l are adjustable lengthwise of the stop-bar 38 and may be set thereon at any letter space position. They are similar in construction, the stop 41 comprising an inverted U-shaped body portion 90, bent up from a blank 91 (Fig. 8), the arms 92 of which extend to a level below the lower face of the stop-bar 38. A pawl 93, having formed on one face thereof the projections or teeth 98 engaging between teeth 99 of the stop-bar, is pivotally supported between the arms 92 on a 'stud 94 which is secured to the lower ends of the arms 92. The projections 46 and 48 are formed on the opposite faces of the pawls and extend into the path of the abutment 42. A pawl operating lever 95 (Fig. 13) is formed from a blank 96 (Fig. 12). Said lever is pivoted on the stud 94 about which it may be swung by a nger-piece 97 in a counterclockwise direction (Fig. 6), to carry the teeth 98 of said pawl out of engagement with the cooperating teeth 99 on the margin-stop bar 38, through the medium of a stud 100 secured to the pawl 93 and extending through a hole 101 in the lever 95. After the pawl 93 has been thus disengaged or released the stop may be adjusted to the desired position on the carriage by the assistance of a co-operating nger-piece 102 secured to the body part of the stop. A return spring 103, connected to the lever 95 and an ear 1030 on the stop body 90, holds the toothed end of the pawl 93 in active engagement with the stop-bar 38.

It will be understood that in the margin stop of this invention the impact of the carriage is not transmitted to the body of the stop but is transmitted directly to the stop bar through the pawl 93. Consequently distortion of the body and shearing tendency on the pivot stud 94 is prevented.

To hold the lever 95 on the pivot stud 94 there may be provided a washer 104 (Fig. 7) which is secured to the outer end of said stud. The connecting stud 100 may be provided with a head 105 to prevent accidental disconnection of the lever 95 from said stud. A spacer 106, which may be in the form of a flange 106 on the stud 94, prevents undue rubbing of the lever 95 against the arm 92 of the stop body.

To assist in locating the margin-stop the stop bar 38 has thereon a scale 107 which may be read through a slot 108 in the front arm 90 of the stop body; said arm having a pointer 109 formed thereon which extends into the slot 105 and over the scale 107.

The margin-stop 40 is constructed of parts which are identical with those of the stop 41 except that some of them, for example, the body blanks 91 and the lever blanks 96, are bent oppositely to those of stop 41, see Figs. 12, 13 and 14. The pawls 92, pivot studs 94, connecting studs 100 and springs 103 are identical in both stops. Except for the parts previously numbered the identical parts in both stops bear the same reference characters. Parts in the stop 40 similar to those in the stop 41 bear the same reference characters with thesuperscript a.

Thus it will be understood that the

stops

40 and 41 are similar and that they are symmetrically arranged on the stop-bar 38 to engage on opposite sides of the abutment 42.

While certain preferred embodiments of the invention have been shown and described, it will be understood that changes in the form, arrangements, proportions, sizes and details thereof may be made without departing from the scope of the invention as defined in the appended claims.

I claim:-

1. In a typewriting machine, the combination of a carriage, a stop-bar having teeth thereon, a margin-stop including a U-shaped body part to embrace the stop-bar, a fixed stud on said bodypart an element pivotally supported on said stud and located between the walls of said bodypart body portion, a tooth on said element to engage between the teeth of the stop-bar, a ngerpiece located on the exterior of said body portion and pivoted on said stud, a member on said element and engaged by said linger-piece; to release said element from the teeth of said bar, and a spring connected to said finger-piece to hold said element in engagement with said stop-bar, a counter stop, and a member on said pivoted element to be engaged by the counter stop to arrest the carriage.

2. In a typewriting machine, a stop-bar having teeth thereon, a margin-stop including an inverted U-shaped body portion to embrace the stop-bar, the sides of the body portion extending beyond the toothed face of the stop-bar, a toothed pawl pivoted between'the extended sides of the body part, a spring to hold said pawl in engagement with said bar, a nger-piece to release said pawl, and a co-operating finger-piece secured to the base portion of said body part towards which cooperating finger-piece the rst named ngerpiece may be moved to release the pawl and whereby the stop may be adjusted lengthwise of the stop-bar.

3. In a typewriting machine, a stop-bar having teeth thereon, a margin-stop comprising a U-shaped body portion to embrace the stop-bar, the sides of the body part extending beyond the toothed face of the stop-bar, a stud securing the free ends of the body in spaced relation, a toothed pawl located between said extended sides and pivotally supported on said stud, said stud having a portion extending through and beyond one of the extended sides, a finger-piece pivotally ist in engagement with said stop-bar.

4. In a typewriting machine, a stop-bar having teeth thereon, a margin-stop comprising a U- snaped body portion to embrace the stop-bar, the sides of the body part extending beyond the toothed face of the stop-bar, a toothed pawl located between said extended sides, a stud secured to the free ends of said sides, said pawl being pivotally supported on said stud, a fingerpiece pivotally supported on said stud, an actuating stud connecting the finger-piece with said paWl, a washer secured to the end of the rst mentioned stud to hold the nger-piece thereon, and a flange formed on the first mentioned stud to space the nger-piece from the side of the body part.

5. In a typewriting machine, the combination of a carriage, a bar thereon, a left-hand marginstop and a right-hand margin-stop on said bar, and line lock mechanism including an abutment to be engaged by said stops, said stops being symmetrically arranged at opposite sides of the abutment, each stop including a body part, a pawl, and an actuating` lever for said pawl, the body parts of both stops being formed of identical blanks bent in opposite directions, the actuating levers being also formed of identical blanks bent in opposite directions, and the pawls being identical so that they may be used in either stop.

FRANK H. TREGO.