US1590407A - Typewriting machine - Google Patents

Description

June 29 1926.

E. E. BARNEY TYPEWRITING MACHINE Filed August 24. 1923 WITNESSES INVENTUR I Hi5 ATTUHNEY r Patented June 29, 1926.

UNITED STATES PATENT OFFICE.

EDWIN E. BARNEY, OF NEW ROCHELLE, NEW YORK, ASSIGNOR 'IO REMINGTON TYPE- WRITER COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPEWRITING MACHINE.

Application filed August 24, 1923. Serial No. 659,116.

My invention relates to carriage feeds or escapement mechanism for typewrit-ing machines and its object is toprovide new'and improved mechanism of the character stated.

To the above and other ends which will hereinafter appear, my'invention consists in the features of construction, combinations of devices and arrangements of parts hereinafter described and particularly pointed out in the claims.

In the accompanying drawings which illustrate the preferred form of my invention applied toa Smith Premier No. typewriting machine.

Figure l is a fragmentary side elevation partly in section showing the train of connections between the key operated universal bar and the escapement dog rocker, together with one of the type bars which actuate the train.

Figure 2 is a fragmentary rear elevation showing some of the parts of Figure 1.

Figure 3 is a top plan view of the dog rocker and dogs drawn to an enlarged scale, one'of the escapementwheel teeth being shown in section.

Figure 4 is a top plan viewlike Figure 3 but showing the dog rocker inoperated position.

Figure 5 is a view corresponding to Fig. 3 but showing the fixed or holding dog in a re-set or re-adjusted position.

Figure 6 is a horizontal sectional view taken on a plane indicated by the section line 1 in Figure 1 and looking downward in the direction ofthe arrow at said line, said Fig. 6 however being drawn -to a larger scale than Figure 1.

Figure 7 is a fragmentary vertical sectional view taken on aJplane indicated by the section line 2'2 in Fig. 3 and looking in the direction of the arrow at said line, parts being broken away. i I, V Figure 8 is a vertical sectional view taken on the plane indicated by the section line 3-3 in Fig. 3 and looking in the direction of the arrow at said line.

Only so much; of the machine is shown herein as is necessary to a complete under standing of the invention, a somewhat fuller disclosureof the Smith Premier No. 60

machine appearing in my co-pending application, Sr. No. 653,683, filed July20, 1923.

The type bars of the machine are horizontally arranged in an arc below the platen, one of the middle type bars being shown in Figure 1 and numbered 1. The type bars are mounted on a common pivot wire 2 which is supported on a vertically disposed segmental type bar support 3, said support being formed with radialslots 4 in each of which one of the type bars is arranged and guided. Rigid with the segment proper is a supplemental frame 5, the segment 3 and the frame 5 being adapted to be shifted vertically onthe main frame of the machine to change case. The lower case position of the segment'3 and shift frame 5 is illustrated in Figure 1, audit is to be understood that key operated mechanism is employed to shift the segment 3, the frame 5,'and the type bars supported thereon, downward for upper case positions. The free end portions of the type bars aresupported on a rest 6 which is'connected with the shiftable parts and shifts down and back with them, so

that the relationship of the type bars on their support is not altered as a result of shifting movements. Each type bar carries two types, a lower case type 7 and an upper case type 7 the upper case type 7 being brought into position for co-operation with the platen when the segment is shifted downward. Each type bar is connected at its heel by a rearwardly extending link 8 with the upper end of a lever 9 comprised in the train of key operated-actuating devices for the type bar. Forward of its pivot 2 as it lies in the basket each type bar is provided with a contact face 1 which is adapted to co-0perate-.with the forward edge of a curved universal bar 10 which is arranged in an arcuate groove indicated at '11 formed in the rear face of the 'type' bar segment 3. Guiding devices for the ."universal bar comprise a pin 12' carried by an extension 13' from the universal bar and slidably engaging in a guide opening 14 in the segment. At its. sides, the universal bar 10 is provided with'rearwardly extending arms 15, each pivotally connected at 16 with the 'forkedfupper end portion of a crank arm 17, said crank arms extending upward from a rock shaft 18. The arms fit loosely between the forks or bifurcations at the upper ends of the arms 17, each pivotal device 16 bridging the associate fork and passing loosely through the arm 15, the oscillating frame 17, 18 providing a support and guide for the universal bar. The rock shaft 18 is pivoted at its ends on coned screw pivots 19 having supports 20 secured to the frame member 5, check nuts 21 holding the screw pivots in adjusted positions. Rising from one end portion of the rock shaft 18 is an arm 22 carrying a lateral screw 23 to which is secured the rear end of a coiled spring 24, the front end of said spring being secured to the part 5, said spring operating to pull back and restore the unive 'sal bar frame 10, 15 and the oscillator 17, 18 to normal position after actuation during which the oscillator or frame and the universal bar are relatively movable. Both the oscillator 17, 13 and the universal bar are mounted to participate in the case shifting movements-of the type bars and their support so that the action of the type bars on the universal bar is the same in both lower and upper case positions. A central arm 25 rising from the rock shaft 18 terminates in forks or bifurcated portions 26 bridged by a shouldered screw 27 which is engaged by the forked forward end of a link or connector 28, said fork fitting loosely between the bifurcations 26.- The connector 28 extends rearward and is forked or bifurcated at its rear end to engage with a grooved stud 29 projecting laterally from the lower end portion of anarm 30 adjustably secured to the rear face of a dog carrier or rocker 31. Said rocker in itself is of ordinary construction and comprises an upright portion 32 rising from a horizontal cylindrical portion 33, and has also a horizontal forwardly extending portion 34. The ends of the cylindrical portion or barrel receives stationary coned pivot screws 35 that are threaded through lugs 36 projecting rearward from a bracket 37 depending from the top plate 33 of the machine. Projecting upward through the rock arm 34 is a stop screw 39, the point of which normally contacts with the under face of the bracket 37, the rocker being mounted in this position by a rocker spring-40. The screw or stop 39 limits the backward swing of the rocker on its pivots 35, the forward swing of the rocker being limited by a stop screw 41 carried by the arm or part 32 and adapted to contact with a stop lug 42011 the bracket or rocker support 37. The upper end portion of the arm 32 is enlarged to provide a head which is formed at one side with two recesses or notches 43 and 44 in which escapemlit dogs45 and 46are respectively loosely housed or arranged. A pivot pin 47 arranged transversely of the plane of the escapement wheel, said pin extending through the rocker arm and bridging the recesses 43 and 44, provides a common pivot for the two dogs 45 and 46. The dog 45 is a stepping dog that is constantly pressed outward above its pivot by a coiled dog spring 48, the toothed or upper end of said stepping dog normally engaging with one of the teeth 49 of an escapement wheel or rack member 50 that is connected with the traveling platen carriage (not shown). The dog 46 or holding dog is of novel construction and mounting, said dog being in the form of a block having at its upper end a tooth or projection 51 provided with a beveled working face 52 that is adapted to engage with the working face of the escapement wheel teeth 49. The holding dog 46 is loosely pivoted on the common pivot 47 but is held from turning on said pivot by two screws and 54 that are threaded through the dog, one above and one below the pivot 47, the inner ends of said screws abutting against the side'of the rocker arm 32. These screws serve a double purpose. In the first place, they hold the dog 46 in fixed relationship with the rocker and in the second place they allow of an adjustment of the dog to vary the position of the beveled working face 52 of the tooth 51. By unscrewing one of the screws and 54 and correspondingly screwing in the other screw, the working face 52 is moved slightly towards or away from the rocker, thus slightly varying tlfe drop. This is illustrated in Figure 5 which as compared with Figure 4 shows the tooth 51 set slightly further away from the rocker so as to give a little less drop when the escapement mechanism is actuated.

The actuation of the universal bar and the escapement devices is effected from the type bar whose contact face 1 acts, as the type bar under its key stroke nears the platen, against the universal bar 10 moving it rearward and causing it to'swing the oscillator 17, 18 rearward on the pivots 19. The rearward swing of the oscillator is transmitted to the dog rocker through the link or connector 28 which thrusts rearward againstthe stud 29 and arm 30, swinging the dog rocker on its pivots 35 and carrying the stepping dog 45 forward from the position shown in Figs. 2 and 3 to the Fig. 4 position. Fig. 4 shows the stepping dog disengaged from the wheel tootlr49 and the beveled face 52 of the holding dog engaged therewith. When the stepping dog is released from the escapement wheel or rack member 50 the spring 48 swings said dog on itscpivot 47 to the positionshown in 4 and by dotted lines, in Fig. 8. On the release of the actuatedkey,.the type bar will return to normal position allowing the restoring spring 24' to restore the universal bar and oscillator, the rocker spring 40 restoring the dog rocker to the Fig. 1 position, the stepping dog re-entering the plane of the escapement wheel and engaging with the next advancing tooth thereof, thus permitting a feeding movement of the carriage to the extent of a letter space. The novel holding dog con struction is comparatively simple yet quite effective, allowing as it does, for an extremely accurate adjustment of the beveled working face by the same means as holds the dog from pivoting.

The connection between the universal bar and the dog rocker comprising the link 28, while comparatively simple, results in so connecting the non-shifting dog rocker wit the shifting universal bar and oscillator to give similar results whether the type bars are actuated in lower case or upper case position. This uniformity of operation is due primarily to the arrangement of the link '28. During case shifting operations the link 28 pivots on the stud or pin 29 which remains stationary, the upward end of said link swinging downward by reason of its connection with the screw'27 which participate in the case shift. Normally, or in lower case, the link 28 is inclined upward from rear to front at an angle to the horizontal and is so disposed that as a result or" the shift it swings downward below the horizontal to substantially the same extent that it started from above the horizontal. In other words, taking the full-line or lower case position or" the link 28 in Figure 1 and comparing it with its dotted line or upper case position, it will be found that a horizontal line through the center of rotation, that is through the axis of the pin 29, will substantially bisect the angle formed by the lower case and upper case positions of the link. The result is that the motion trans .mitted from the oscillator to the dog rocker will be substantially the same whether the link is in lower case or upper case position.

Various changes may be made without departing from my invention.

What I claim as new and desire to secure by Letters Patent, is I 1. In escapement mechanism for typewriting machines, the combination of a dog carrier having fixed pivots, a pair of dogs having a common pivot separate from the carrier pivots, both of said dogs being adapted to turn or receive rotary movements on said common pivot, and means independent of the common pivot for fixing the relationship of one of said dogs thereto.

2. In escapement mechanism for typewriting machines, the combination of a dog carrier,- a pair of dogs mounted on said car-- rier and having a common pivot on which both dogs may turn or rotate, and means independent of the pivot for fixing the relationship of one of said dogs thereto, said means comprising'adjustable screws carried by said last mentioned dog at opposite sides of said pivot- 3. In escapement mechanism for typew'riting machines the combination of an escapement wheel, a dog carrier, a stepping dog, a holding dog having a beveled work,- ing face, a common pivot for said dogs extending transversely of the escapement wheel and means for adjustably securing the holding dog on said pivot so as to vary the position of its beveled working face.

at. In escapement mechanism for type writing machines, the combination of a dog carrier, a rack member, a stepping dog, a holding dog pivotally supported on said carrier, and means for both holding said dog in fixed relationship to said carrier and also for adjusting its working face to vary its place of engagement with said rack mem ber.

Signed at the borough o1 Manhattan, city i of New York, in the county of New York, and State of New York, this 22nd day of August, A. D. 1923.

EDl VIN E. BARNEY.

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