US1936466A - Typewriting machine - Google Patents

Description

NOV. 21, 1933. c w CRUMRINE I v V TYPEWRITING MACHINE Filed April 24, 1931 2 Sheets-Sheet 1 I INVENTOR CHESTER w. VCRUMRINE 2 9 ATTORNEY Nov. 21, 1933. w R'UMRINE v 1,936,466

TYPEWRITING: MACHINE Filed April 24, 1951. 2 Sheets-Sheet 2 INVENTOR CHESTER w. CRUMRINE ATTORNEY Patented Nov. 21, 1933 UNITED STATES PATENT- OFFICE 1,936,466 TYPEWRITING MACHINE Chester W. Crumrine, Rochester, N. Y., assignor to Electromatic Typewriters, Inc., N. Y., a corporation of New York Rochester,

Application April 24, 1931. Serial No. 532,526

13 Claims.

This invention relates to improvements in typewriting machines, and the principal object of the invention is the provision of a universal bar which is simple in construction, easily assembled in the machine, and which eliminates wear, and therefore permits of close and permanent adjustment. Another object of the invention is to provide a universal bar which comprises but few parts and is therefore economical to make, and easy to' assemble.

Still another object of the invention is to pro vide auniversal bar which is mounted on resilient supports, and free from pivots and which therefore has no bearings to wear or bind.

Another object of the invention is to so support a universal bar on resilient supports that it moves readily in the plane in which it normally operates but is restrainedagainst movement in other directions.

Another object of the invention is the provision of adjustable means for connecting the universal bar with the parts actuated thereby so that no adjustments of the universal bar are necessary.

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 following the specification.

In the drawings;

Fig. 1 is a transverse vertical section of a typewriting machine, parts being shown in elevation, illustrating one possible embodiment of the inven- 10m; Fig. 2 is a plan view of the universal bar, a fragment of its support being shown in section;

Fig. 3 is a rear elevationof the same;

Fig. 4 is an elevation of a resilent support for the universal bar detached;

Fig. 5 is a plan view of the same, and

Fig. 6 is a fragmentary inverted plan view of escapement devices actuated by the universal bar.

Referring particularly to the drawings, the invention is shown applied to a power driven typewriting machine of well known type. It will be understood, however, that the invention is not limited to such machines but is applicable to all typewriting machines employing universal-bars. In the machine illustrated, the frame is provided with raceways 1 for the recepf ion of anti-friction rollers 2 on which a carriage 3 is-mounted for transverse movement on the frame. -A cylindrical platen 4 is revolubly mounted in the carriage on jwhich a work sheet may be supported to receive impressions from a type 5 on a type bar 6 pivotally mounted in a type basket 7.- A spring drum 8, Fig. 6, is operatively connected with the carriage to move it on the frame in a direction for letter and word spacing, such movement being controlled by escapement devices of usual or preferred form. I

In the illustrated embodiment, the escapement devices comprise a rack 9 securedto the carriage and having ratchet teeth 10 alternately engaged by one or another of a pair of pawls 11 and 12 slidably and pivotally mounted on a bracket 13 secured to the frame of the machine. Springs 14 connect the pawls with a fixed part and-resiliently tend to move them relatively to the carriage and into engagement with the rack. A lever 15 is pivoted to swing in a vertical plane on a fixed part and arranged to swing the pawls alternately out of engagement with the rack.

Means controlled by a spacing bar'or key 16 arranged at the front of the keyboard are provided for actuating the escapement devices independently of the type bars for word spacing, etc. Said means comprises a lever 17 adapted to move into engagement with and actuate the lever 15, but normally resiliently held in retracted position by a spring 18 which connects the lever with a fixed part. An adjustable link 21 connects the lever 17 with a power actuated lever 19 mounted on the common pivot rod 22; The lever 19 has a stop 23 provided thereon adapted to engage a fixed part and limit its movement under the action of the spring 18. A link 24' connects the lever 19 with one arm of a bell crank lever 25 pivoted at 26 on the frame, and the other arm 28 of the bell crank projects downwardly adjacent a power driven roller 27. A cam 29 is revolubly mounted on the arm 28 adjacent the surface of the power driven roller but normally out of engagement therewith. A spring-pressed arm 31 engages one of a pair of diametrically arranged lugs 32 on the cam and resiliently tends to turn the cam into engagement with the power driven roller or a stop 33 on a key actuated lever 34 also pivoted on the arm 28. The stop 33 engages one of a pair of lugs or projections 35 on the cam, and is movable out of the path of said projection by a key lever 36 on which the space bar 16 is mounted and having a slotted arm 36 which engages the lever 34. When the bar 16 is depressed, it swings the lever 34 to move the stop 33 out of the path of the lug 35 and permits the cam to rotate a onehalf revolution until the other lug 35 engages the stop 33 or a stop 3'7 on the lever 34, and arranged in the path ofthe lug if the space bar be held depressed. When the bar isreleased, the stop 110 37 moves out of the path of the lug, which then engages the stop 33. The lever 36 is mounted on the common pivot rod 22 and is resiliently retained in normal position by means of a spring The type bar is actuated by a similar set of power actuated devices comprising a cam 41,

bling the universal bar in the-machine.

mounted on a bell crank lever 42 which is operatively connected with the type bar 6 by means of a link 24' and a bell crank 43 on the pivot rod 22 and connected with, the toggle lever 44 pivoted on the type bar by means of the link 45. A spring 46 connects the bell crank 43 with a fixed part and resiliently retains the type bar in normal retracted position. The operation of the cam 41 is controlled by a key lever 4'7 mounted on the pivot rod 22 and havinga key 48 by which it may be manually operated. The key lever 47 has a downwardly projecting arm whereby it operatively engages a lever 51 which cooperates with the stops 52 or 53 on the cam for controlling its movement. A spring-pressed arm-54 on the bell crank 42 engages one or another of a pair of lugs 55 on the cam and urges it into engagement with the power driven roller. The parts thus far described are or may be of usual or well known construction.

It is desirable to actuate the escapement devices each time a type bar is actuated to print to permit the carriage to automatically move forward one letter space distance to space the letters printed, the space bar 16 being operated to space between successive words. To this end, a universal bar, 61 is arranged in thetype basket adjacent to the pivots of the type bars and projects into the paths of the type bars so that any of the type bars engages therewith when it engages the printing point on the platen. The universal bar 61 is arcuate inform, corresponding to the form of the type bar segment, and is resiliently mounted on the type basket. A pair of studs 62 and 63 are threaded in tapped openings in the type basket and project rearwardly and downwardly therefrom. Each of the studs 62 and 63 is provided with an angular head adjacent its threaded end whereby it may be operated by means of a suitable tool. Projecting rearwardly from points adjacent the opposite ends of the bar 61 are arms 64 and 65 having ears 66 and 6'7 at their rear ends, to which the opposite ends of a flat or leaf spring or resilient support 68 is secured. The member 68 is provided with a pair of spaced openings 69 and '70 intermediate its ends and arranged to register with the rear ends of th studs 62 and 63, and to which the support 68 may be secured by means of headed screws, as shown. A leaf spring or resilient member '71 has similar spaced openings therein whereby it is secured to the type basket by the studs 62 and 63 which may be arranged in said openings. Washers '72 and '73 may be arranged on the studs to space the member '71 from the type basket. For convenience in assembling, the openings 69 and '70 are made larger than the shanks of the screws engaged thereby, to provide for a limited adjustment when assem- The opposite ends of the spring '71 are secured to lugs '74 and on the universal bar and cooperate with the resilient member 68 to move the universal bar resiliently to normal position. An adjustable link '76 is pivoted at its forward end to an ear '7'? projecting from the arm 65, and at its rear end is connected with the lever 15. By this arrange- -ment, the lever 15 is actuated to operate the members 68 and '71 under the action of the type bar, the proper time of operation of the escapement devices being controlled by adjusting the link.

It will be noted that a universal bar constructed as herein described is capable of general application, has no bearings to become worn and get out of adjustment with use, the studs 62 and 63 are rigidly mounted in the type basket, and the universal bar is so secured thereto that accurate and permanent adjustment is possible. The universal bar is resilientlymounted on the members 68 and 71 so that it moves bodily against the resiliency of said members to operate the escapement or other devices but is restrained against l. The combination with a frame, of a platen mounted thereon, key controlled printing devices,

a universal bar, resilient supports rigidly mounted on the frame intermediate their ends and secured to the universal bar at their ends, an actuating member operatively connected with said universal bar, and means for actuating the universal bar against the resiliency of its supports when said printing devices are operated.

2. In a typewritingmachine, the combination of a frame, a platen mounted thereon, a type bar movable to and from operative engagement with the platen, a universal bar, a movable part operatively connected with said universal bar; and a leaf spring mounted on the frame at points between its ends and having said ends connected to the universal barand tending to move the universal bar into the path of the type bar to be actuated thereby.

3. In a typewriting machine, the combination of a frame, a platen mounted thereon, a type bar movable to and from operative engagement with the platen, an arcuate universal bar, a movable part operatively connected withsaid universal bar, and a leaf spring fixedly mounted intermediate its ends and connected with the universal bar at its ends and tending to move the universal bar into the path of the type bar to be actuated thereby.

4. In a typewriting machine, the combination of a frame, a platen mounted thereon, key controlled printing devices, a universal bar, a mov-' able part operatively connected with said universal bar, a pair of resilient supports secured at their ends to the universal bar and mounted on the frame at points between their ends, said resilient supports constituting the sole support for the universal bar, and means actuated by said key controlled devices for moving the universal bar against the resiliency of its supports.

5. In a typewriting machine, the combination of a frame, a carriage movable thereon for letter spacing, a platen on the carriage, a type bar movable to and from printing engagement with the platen, a type basket in which said type bar is mounted, a resilient support secured to said type basket at points between the ends of the resilient support, a universal bar secured to the L spacing, and means operatively connecting said controlling means with the universal-bar.

6. In a typewriting machine, the combination of a frame, a carriage movable thereon for letter spacing, a platen on the carriage, a type bar movable to and from printing engagement with the platen, a type basket in which'said type bar is mounted, a pair of resilient supports mounted on the type basket in spaced relation to each other at points between the ends of the supports, a universal bar secured to the ends of saidv supports and resiliently urged thereby into the path of the type bar, means for controlling the movement of the carriage for letter spacing, and means operatively connecting said controlling means with the universal bar.

7. In a typewriting machine, the combination of a frame, a carriage movable thereon for letter spacing, a platen on the carriage, a type bar movable to and from printing engagement with the platen, a type basket in which said type bar is mounted, a support rigidly secured to the type basket and projecting therefrom, a leaf spring secured to said support, a universal bar secured to said leaf spring and urged thereby into the path of the type bar, means for controlling the movement of the carriage for letter spacing, and means operatively connecting said controlling means with the universal bar.

8. In a typewriting machine; the combination of a frame, a carriage movable thereon for letter spacing, a platen on the carriage, a type bar movable to and from printing engagement with the platen, a type basket in which said type bar is mounted, a pair of supports rigidly secured to the type basket and projecting therefrom, a pair of leaf springs secured in spaced relation to said supports, a universal bar secured to said springs and urged thereby into the path of the type bar, means for controlling the movement of the carriage for letter spacing, and means operatively connecting said means with the universal bar.

9. In a typewriting machine, the combination of a frame, a carriage movable thereon for letter spacing, a platen on said carriage, a type basket, a plurality of type bars arranged on an arcuate pivot in said type basket and movable to and from engagement with the platen, a universal bar curved to correspond to the arc of said pivot arranged in the paths of said type bars to be actuated thereby, a resilient support connected at its ends to said universal bar, means engaging said resilient support intermediate its ends for securing it to the type basket, escapement devices for controlling the movement of the carriage for letter spacing, and means operatively connected with the universal bar for operating the escapement devices when a type bar is operated to move the universal bar against the resiliency of its support.

10. In a typewriting machine, the combination of a frame, a carriage movable thereon for letter spacing, a platen on said carriage, a type basket,

a plurality of type bars arranged on an arcuate pivot in said type basket and movable to and from engagement with the platen, a universal bar curved to correspond to the arc of said pivot arranged in the paths of said type bars to be actuated thereby, a resilient support connected at its ends to said universal bar and having a pair of spaced openings therein, a pair of studs projecting from the type basket and loosely engaging said I openings, means for securing the resilient support to the studs, escapement devices for controlling the movement of the carriage for letter spacing, and means operatively connecting said escapement devices with the universal bar.

11. In a typewriting machine, the combination of a frame, a platen, type bars movable to and from operative engagement with the platen, a type basket in which said type bars are mounted 105 on a curved pivot rod, a universal bar curved to correspond substantially to the curvature of said pivot rod and arranged in the path of said type bars and comprising a rearwardly projecting arm at each of its ends and a pair of resilient members connecting said arms, and means engaging said resilient members for supporting the universal bar on the type basket.

12. A universal bar comprising a bar portion, a pair of arms projecting from one side thereof, and a pair of spaced resilient supports having their ends secured to and connecting said arms and substantially parallel with each other, said resilient supports being rigidly mounted at points between their ends.

13. A universal bar comprising an arcuate bar portion, a pair of arms projecting from one side thereof, and a pair of spaced resilient supports having their ends secured to and connecting said arms, said arms being arranged in a plane inter- 125 secting said arcuate portion, and the resilient supports being rigidly mounted at points between their ends.

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