US1631970A - Typewriting machine - Google Patents

Description

R. J, LEWIS 'urawamme mums Filed Dec. 29. 1925 WITNESSES ATTORN Y fill Patented June 14, 1927.

UNITED STATES PATENT OFFICE.

RICHARD J. LEWIS, OF MOHAWK, NEW.YOR K,.ASSIG NOR .T O REMINGTON TYPEWRITEB COMPANY, OF ILION, NEW YORK, A CORPORATION'OF NEW YORK.

TYPEWRITING' MACHINE.

Application filed December 29; 1925. Serial No. 78,546.

My invention relates'to braking devices for typewriting machines, and its object is to provide a new and improved braking contrivance which is simple in construction, easy to adjust and readily applicable to existing styles of typewriting machines.

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 carrying out my invention in the present instance I provide a braking device or arm which is engaged by the feed rack on the carriage when it is operated to release the carriage, as for tabulating, said braking arm coacting through the rack with the car riage to exert a braking effect thereon during the tabulating run. The braking arm is perforated to fit loosely andslidably on an u right "stationary rod or guide around w rich, below the arm, is coiled a wire spring on which the arm rests, providing a yielding cushion or support. Adjustable on the rod: above the'arm is a thumb nut whereby the amount of spring .pressure on the arm may be varied, said nut also serving as an abutment or pivot on which the arm may turn or swivel during the braking action. A guide cooperates with'a slotin one end of the braking armto revent it from turning about the rod an thus becoming displaced relatively to the rack.

My invention will be described in detail in connection with the accompanying drawings wherein Fig. 1 is a fragmentary rear elevation, partly in section, of a typewriting machine to which my invention is shown as applied, only so much of the machine being illustrated as is necessary to a full understandin of the invention.

Fig. 2 is a fragmentary plan View of the braking device together with its supportand' certain cooperating parts.

Fig. 3 is a vertical sectional view of the braking device and associate parts.

Fig, 4 is a view corresponding to Fig. 3 but omitting some of the partsshown therein and illustrating the braking device in operative relationship with the'feed rack or bar.

Fig. 5 is a detached perspective viewof the braking arm.

" I have shown the preferred form of my invention 'as applied to a No. 12 Remington typewriting machine and in association with in'g, retarding or restraining action on the carriage or moving element. I

In the drawing, the main frame, as shown,

com-prises a base 1, posts 2' and a top plate 3. Fixed'above the top plate "are front and rear guide rails, the rear rail 4 beingshown, said rails cooperating through anti-friction rollers 5, with the front and rear bars of a traveling platen carriage, only the rear bar 6 whereof appears in the drawings. Mounted on the carriage is a platen 7. Saidcarriage is constantly urged leftward along its track-ways by a motor or spring drum 8, which is mounted on the mainframe and is connected'by a band or strap 9 with -the carriage. Pivoted at 10 to brackets 11 on the carriage bar =6 is a supporting frame 12 to the upper bracket 16 to the under bracket or hanger 17 comprises at the right (viewed from the rear, as in Fig. 1) the usual counter-sunk headed screw 18, whileat the left there is'employed a screw member or stud, indicated asa whole by the numeral 19, this stud being of a special design, employed for the purposeso-f my invention as ereinafter explained. As best shown in Fig. 3, said stud 19 comprises a body portion 20, a lower threaded portion 21 and an upperthreaded portion 22 of smaller diameter. Between the body portion and the upper threaded end portion 22 there intervenes a hexagonal head portion 23 whereby the stud may be readily screwed into and out of place. The lower threaded end 21 engages in a tapped opening in the lower hanger 17, while the hexagonal head 23 and hr a cket the upper threaded portion 22 project above the upper surface of the left-hand portion of the bracket 16. The rear portion of the shaft 15supports an escapement wheel (not shown) which cooperates with the usual escapement dogs to afford letter space feed movements of the carriage and platen under the pull of the motor 8. By lifting or swinging up the feed rack 13 about the pivots 10 it may be disconnected from the pinion 14 and the carriage and platen thereby freed for uninterrupted movements or runs leftward under the impulse of the motor or main spring.

l. have shown my invention associated with a tabulatiirc mechanism invented by G. A. tileib and disclosed and claimed in his application Sr. No. 29,874, filed May 13, 1925. Said tabulating mechanism comprises a column-stop bar 2st, extendinglengthwise of the carriage at its rear and mounted on extensions .25 of the brackets 11 secured to the rear bar 6 of the carriage. Adjustaliily mounted on the stop bar .24: are one or more column stops 2G. Cooperative with. the column stopsilti is a notched tabulator stop 2'? which is slidably supported on the rearwardly bent car 28 of a bracket 29, having foot portions 80 which receive screws 31 whereby said bracket is secured to the top plate 3. The tabulator stop or frame-stop 27 is connected by rivets with an angular piece 33 at the opposite side of the ear 28, the rivets passing through a slot-way in said ear and the construction being such that the stop member coi'nprisin r the part 27 and the part 3?) is slidably sup 'iorted on the ear for up and down movement into and out of the path of the do\inwardly projecting column stops. The laterally extending portion of the part 33 carries a stud or pin 341-, which rests on and is supported by the free end of a spring plate said plate haying: an ear 36 which receives screws 37. whereby the spring plate is secured to the rear face of a le er member 38, pivoted at 39 on the 232. The lever 38 provided with a nose or extension 40 which overlies the stud -34. said stud being thus confined between the spring; 35 and the nose 40. Also the ri jht-hand arm of the lever member is provided with a forward extension 41. terminating in a rounded shoe or lifter 455 which underlies the rack or bar 13. The right hand end portion of the lever member 38 has adjustably secured to .it by screws 4-3 and 4.4- an extension to which is pivotally connected at l6 the upper end of an angular link or connector 47. the lower end whereof is pivotally connected at d8 to a tabulator lever 49, fulcrumed at the rear of the machine and terminating at the front in an upwardly extending stem to which is secured a tabulator key 50. When said key is depressed, the lever l9 will swing down on its fulcrum, thus pulling down the link at? and the extension d5, thereby rockiin the lever member 38 on its fulcrum 3%) and cansing the inner or righbhand arm thereof to swing upward carrying with it the spring plate or finger 35 and causing said linger acting against the stud 34 to slide upward the tabulator stop 27 into the path of the column stops. Also the shoe 4:2 concurrently acting against the under side of the rack 13 will swing the rack upward and release the carriage, which will run or move continuously leftward until arrested by the engagement of the proximate column stop 26 with the projected frame stop 9?. On releasing the tabulator key the tabuiatingg mechanism will be restored to normal position by means comprising av spring 51. so cured by a screw 52 to the bracket 29, the free end of said spring overlying the extension ll and constantly tending to swing the stop 27 and the lever 38 downward. It is: not deemed necessary more fully to describe the construction and operation of the tabulating mechanism since it is not per se my invention, and is shown herein Elijan example of mechanisms with which my present invention may be advantageously employed.

In order properly to regulate and control the runs or free movements of the carriage, I have provided a new and improved braking contrivance which is normally inert or inoperative and is rendered automatically effective when the carriage is released for such uninterrupted runs, as by the labulat ing; mechanism above described.

My improved braking; mechanism coniprises an annular member or arm shown detached in Fig. 5 and designated as a whole by the numeral 53. Said arm or member comprises a lmriziiintal body portion 54, having; at its rear a. down ard ertension 55 terminating in an oil-set it formed with a. slot 57. At the front the body portion 54- has an extension :38 which projects upward at an angle to the body portion and terminates in an inclined end portion 59, to which is detachably secured, as by rivets (30, a. cont-a :t or plate (31 which overlies the upper end of the rack or bar 13 and is adapted to be engaged thereby. The body portion 54 is formed with :i perforation or hole 62 which its loosely over the rod-like end portion 22 of the stud l!) which projects above the bracket lii. The slot 57 of the braking arm engages with a screw 63 which projects above the ijiracket l t; and is preferably the stop screw employed with the usual. back spacing mechanism of the Remington machine. The check nut 63 which holds the screw 63 in setpositions may serve a stop for the off-set 56, thus limitingv moven'rents oi the braking member 53 under actuation of the rack 13. The

till

braking arm 53 rests, on and "is supported by a yielding or cushion device in theforln of a coiled spring 64 which in turn is supported by the head 23 of the member 19. Above the body portion 54 or at its opposi't-e side from the spring 64L is a regulating device in the form oi a thumb nut 65 which is threaded on the rod 22 and at its under side is formed with a boss 66against which the braking device is constantly pressed by the spring 64. The periphery of the nut 65 is preferably knurled or roughened, so that it may be turned conveniently. The under face of the boss 66 is preferably .i-l-("OlQCl or formed with radial grooves or depressions indicated at 67, these depressions being adapted to cooperate with a projection '68 on the upper face of the body portion 54 in order to hold the nut 65 in adjusted positions, the devices 67 and 68 providing in effect a detent for the nut 65. The screw 63 serves as a guide to prevent the member 53 from turning about the rod 22 as a'pivot. The thumb nut 65 by being threadeddownward or upward on the rod 22 not only serves to vary and regulate the tension of the cushion or spring support 64 but also to vary the normal position of the braking arm 53 and the distance of the contact 61 from the topof the rack 13. In other words, the nut or abutment 65 provides means for varying and regulating the action or effect of the braking contrivance.

In operation, with the parts related as shown in Figs. 1, 2 and especially Fig. 3, on depression of the tabulator key 50 the frame stop 27 is projected upward and the rack 1.3 is lifted by the shoe 42,.thereby releasing the carriage. As the rack swings upward it contacts with the contact device 61 and acts therethrough on the braking member or arm 53, swinging said member to the position shown in Fig. 4, member swinging or turning on the thumb nut 65 as a fulcrum. As the braking arm is thus moved by the rack the spring 64' will be depressed, reacting on the contact end of the brake 53 and through it on the rack 13 and the carriage ,on which it is supported, thus braking or retarding the carriage and preventing it from causing a too violent coaction between the tabulator stops. The extent of the braking action may, of course, be conveniently regulated by adjusting the thumb nut 65, the braking effect being increased by screwing down the nut and compressing the spring 64, and correspondingly decreased by unscrewing the nut or turning it to move upward on the threaded rod or screw 22. After the carriage has been. arrested .by the coacting tabulator stops 27 and 26, the .key -50 may be released, permitting the tabulator mechanism and the rack 13 to return to normal position. As the rack or said movable bar 13 swings downward fromthe Fig. at to the Fig. 3 positioln the braking mcmbcr53 will follow It, said member being restored to normal position by the action of the spring 6 L. It-Jwill be observed 1. Braking mechanism for the carriage of a typewriting machine, comprising a brak ing arm adapted to cooperate with the carriage, anda cushioning device on whichsaid arm is adapted to swing so that its opposite end portions are alternately raised andlowered. V J

2. Braking mechanism for the carriage of a typewriting machine, comprising a braking arm adapted to cooperate with thecar"- riage, and a cushioning device on which said arm is adapted to swing so that its opposite end portions are alternately raised and lowered, said device also restoring said arm to normal position after operation. C V

3. Braking mechanisnifor the carriage of a typewriting machine, comprising a braking arm eti'ective on the carriage when it isreleased, and a spring support forsaid arm mounted on a stationary part of the *machine, said braking arm being adapted to swing on said spring support so that the op posite end portions of said arm are adapted to be alternately raised and lowered.

4. Braking mechanism for the carriage of a typewriting machine, comprising a braking device effective on the carriage when it is released, a coiled spring on which said device is supported, and means for maintaining said device on its support, said braking device being adapted to swing on said spring so that the opposite end portions of said device are adapted to be alternately raised and lowered.

5. Braking mechanism for the carriage of a typewriting machine, comprising a braking arm effective on, the carriage when it is said arm is supported, and a device on which said arm is adapted to pivot when it becomes operative.

7. Braking mechanism for the carriage of a typewriting machine, comprising a brake that is effective on the carriage when it is l'ilfi released, spring means on which said brake is supported, and a device on which said brake is adapted to pivot when it becomes operative, said device being adjustable to vary the action of said brake.

8. Braking mechanism for the carriage of a typewriting machine, comprising a device rendered effective as a brake on said car riage when it is released, a coiled spring by which said device is supported and a separate abutment against which said device is maintained by said spring, said abutment serving as a pivot for said device.

9. Braking mechanism for the carriage of a typewriting machine, comprising a braking arm adapted to cooperate with the riage, a coiled spring by which said arm is supported, and an abutment against which said arm is pressed constantly by said spring, said arm pivoting on said abutment when the carriage is released, said abutment being adjustable to vary the client of said arm.

10. In a typewriting machine the combination oi a traveling carriage, a braking member therefor, a rod on which said memher is loosely mounted between its ends, a spring coiled around said rod and serving both as a support and a restoring means for said member, means for preventing displacement of said member from said rod, and a stationary guide for preventing turning movements of said member about said rod as a pivot.

11. In a typewriting machine the combination of a traveling carriage, a braking arm, a rod on which said arm loosely lits, a wire spring coiled around said rod and pro viding a cushion for said arm, means for compressingsaid spring and preventing displacement of said arm axially of said rod, and a stationary guide cooperative with one end portion of said arm to prevent it from turning about said rod as a center, the other end portion of said arm acting on the carriage.

12. In a typewriiing machine, the combination of a raveling carriage, an arm eitectire as a brake thereon, an upright rod over which said arm loosely fits, a wire spring coiled around said rod beneath said arm and. providing a yielding support llmretor, an adjustdale tlnnnb nut threaded on said rod above said arm, said nut serving' as a pivot for said rod during its braking action, and a stationary guide for preventing said arm from turning about said rod as a center.

13. In a typewriting machine, the combination of a traveling platen carriage, a releasable feed rack thereon, a cooperating feed pinion, a braking arm, a yielding support for ,said arm, an upright rod on which said arm loosely fits, means for preventing said arm from turning about said red as a pivot, an abutment with which said arm constantly engages, a tabulator key, and connections controlled by said key eil'ective to release said rack and cause it to coaet with said braking arm.

1a. In a typewrlting machine the combination of a traveling carriage, a braking device therefor, a rod along which said device is slidable, a stationary guide, one portion of said device enacting with the carriage and another portion with said stationary guide, a spring coiled on said rod and supporting said device, and an adjusting nut threaded on said rod at the opposite side of said device from said. spring, said nut serving as a pivot for said arm and being operative to vary the location of said arm and the pressure of said spring thereagainst. 15. In a typewriting machine, the com bination oi? a traveling platen carriage, a releasable teed rack on said carriage, a cooperating teed pinion. column stops on said carriage, a cooperating tabulator stop on the frame ot the machine, a tabulator key con nected to said frame stop, a rack-lifting device operative by said key, an angular braking arm, an upright rod, said braking arm being perforated to fit loosely on said rod, a spring coiled on said rod on which said braking arm rests, a nut on said rod against which said arm is pressed by said spring, a guide for preventing said arm from turning on said rod as an axis, said rack when released by said tabulator key coacting with said arm which is caused thereby to turn on said nut as a pivot and exert a retard ing effect on said rack and through it on the carriage. 16. In a typewriting nmchinc, the combination of a traveling carriage, a releasable feed rack thereon, a cooperating r'eed pinion, a braking arm, a detachable contact on said arm, a guide rod for said arm, a yielding support for said arm, an abutment with which saidarm is in constant engagement, a tabulator key, and connections controlled by said key that are effective to release said rack and cause it to operatively engage with said contact, said braking arm pivoted on said abutment during the braking operation.

17. In a typewriting machine, the combination ol. a traveling carriage, a movable bar thereon, a cooperating ii'eed pinion, a braking arm, a detachable contact on said. arm, a yielding support for said arm, a guide rod for said arm, a thumb nut on said rod with which said arm engages, the en gaging face of said nut being provided with radial depressions and said arm with a cooperative projection, a key, and connections controlled thereby to move said bar and cause it to coact operatively with said contact during carriage travel.

18. Braking mechanism for the carriage of a typewriting machine, comprising a braking arm that is effective on the carriage when released, spring means on which said arm is supported, and a device on which said I arm is adaptedto pivot during the braking operation, said device being adjustable to vary the normal position of said braking arm.

19. Braking mechanism for the carriage of a typewritmg machine, comprising a braking arm that is effective on the carriage when released, spring means on which said arm issupported, and a separate part against which said arm is constantly pressed by said spring, said part being adjustable to vary the normal position of said arm and also to alter the tensionof said spring.

20. In a typewriting machine, the combination of a traveling carriage, a key-controlled bar movably mounted on the carriage, a co-acting braking arm overlying said bar 20 but normally separated therefrom, and a support for said braking arm, said support being adjustable to vary the normal relationship between the coacting arm and bar.

21. The combination with a carriage havin a liftable feed rack, of a brake arm overlying said liftable rack, and a spring against which said arm acts when the rack is lifted.

22. The combination with a carriage having a liftable feed rack, of a rocking brake arm, one portion of which overlies said rack, a spring underlying another portion of said brake arm and on which the said arm is directly supported, and a stop limiting the upward movement of said brake arm by the pressure of said spring whenthe rack is in normal unlifted position.

Signed at Ilion, in the county of Herkimer, and State of New York this 23rd day of December, A. D. 1925.

RICHARD J. LEWIS.

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