US1268859A - Type-writer attachment. - Google Patents

Description

E. P. C LOMAS.

TYPE WRITER ATTACHMENT.

APPIIICATION FILED OCT. 23, 1912'.

1 $8385 Patented June 11. 1918..

5 SHEETS-SHEET l- ATTORNEYS TYPE WRITER ATTACHMENT.

APPLICATION men OCT. 23. 1917.

Patented June 11. 1918.

5 SHEETS-SHEET 2- E. P. C. LOMAS.

TYPE WRITER ATTACHMENT.

APPLICATION FILED OCT. 23. 1911.

l ,fifi figo I Patented June 11. 1918.

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me WRITER ATTACHMENT.

APPLICATION FILED OCT. 23. 3917- w -b Rammed; 11111011. 1918.

E. P. C. LOMPi-S. TYPE WRITER ATTACHMENT.

APPLICATION FILED 067T. 23.-1917:

Patented June 1L 1918.

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TYPE-WRITER arraorrntnnr."

messes.

Specification of Letters Patent. Patented June 111, 1918.

\ ,1 J Application filed. October 23, 1917. Serial No. 198,105.

T all whom it may concern;

Be lrnown that I, EARL P. C. LoM is, a citizen blt'the United States, and a res dent of Butte, in the county of SilverBow State of Montana, have invented certain new.

and useful Improvements in Type-Writer Attachments, of which the following'is a specification.

My invention is an improvement n typeto writer attachments, and has for its object to provide mechanism in connectionwith the usual typewriter for automatically return ing the carriage at the end of its movement durin writing, wherein a spring motor is provic ed, wound and tensioned by the movement of the key barsfon their strikingmovd ment; and whereinmeans is providedfo'r re straining the operation ofthe motor untll .the end of the line is reached,"other mechanism bein provided, controlled by the move:

ment of t e carriage, for'releasing ,the re{ straining means, the said restraining ine/ans being connected to the key locking means 201 releasin sition.

A further object of theiinvention 'is to provide trip mechanism operated by the car riage at the end of its movement during the writing for tripping-the restrainingjmeans for the carriag returning mechanism.

A further object is to provide means'controlled by the usual carriage releasing means for releasing the restraining means of the carriage returning means whenever the carriage is released in the usualmanner;

'A further object is to provide -mecha-' nism controlled by the movement of the carriage for preventin -stoppage of the mo .40; tor andthe carriage by the-releasejof the key lockin In the drawings; Figure Lisa rear. view of a typewriter provided with the. attachment; 7

Fig. 2 is an end View, with parts in'section and with parts removed;

9' means of the typewriter..

Fig; 3 is a detail of the-rehaseconnection;

Fig. at is a top plan viewof the typewriter; e i I Fig. 5 is a perspective, View of one of the of the carriage and a portion of the frame;

Fig. 7 is an end view of Fig. 6; l

5 A crank '6 is connected with the the restraining means when the 25 key locking means is placed inoperative p0- typewriter.

6- is a partial plan view of one end .Fi 1'8 and 9 are perspective viewsot deta'i s of the mechanism for operating the" spacing mechanism- Fig. 10 is a deta1l perspective view of a portion of the spring motor and its controlling mechanism;

' Fig. 11 is a partial perspective view showingja portion of the carriage; Fig. 12 is a section on the line 12-42 of Fig. 11; and

I i Fig. 13 is a section on the line l2, 12 of Fig. 12.

,The present embodiment of the invention is shown in connection with an Underwood typewriter, indicated at 1, and the improved mechanism comprises a. spring which is arranged within a cyllndrlcal casing 3, one end of the sprlng being secured to the casing and the other to a shaft& which is journaled at the right end of the typewriter and at'the rear thereof, in the same manner as the usual spring 5 for running the carriaggfio the left.

aft at the opposite end from the sprin ca ing, to perm1t the spring to be woun and a ratchet wheel 7 is secured to the shaft, with which 7 for holdring 10, and move'the said ring rearwardly..

This ring bears against the angular ends of a pair of connected'bars 11, which are pivoted to the tops of levers 12 rigid with a shaft 13 journaled in the typewriter casing at the rear thereof and form a part of the The motion of these bars 11 rearwardly is utilized to store up power to return the carriage, that is, to wind the spring 2. This spring, which is the motor for returning the carriage, is wound to a ten;

sion which exceeds the tension in the primary motor 5 few turns, so that when the restraining means for preventin the operation of the spring 2 is release the motor 2 will return the carriage.

The motor casino 3 is connected to the carriage by a band 14, the band winding upon the motor casing when the carriage is drawn to the right. A ratchet wheel 15 is rigid with the motor casing, and the teeth of this ratchet wheel are engaged by pawls 16 and 17, the said pawls being the actuating pawl and the holding pawl, respectively. The pawl 16 is pivoted toone of the arms of a bell crank lever 18, and the other arm of the lever is pivoted. to oneof the bars 11 in such manner that when the bar is moved rearwardly the pawl 16 willbe moveddownwardly. The pawl 17 is pivoted between.

lugs 19 on the typewriter casing, and springs 20 are provided for pressing the pawls toward the ratchet wheel.

It will be evident from the description that every time a letter is struck and the bars 11 move rearwardly, the motor 5 will be advanced a distance of one tooth, and

and each armhas an extension 24 passing just inside the adjacent pawl and adapted to engage a cam 25 on the pawl to force the said pawl rearwardly to disengage it from the ratchet wheel. This yoke is swung to release the pawls by means of the looking I bar 26 for the keys.

When the end of the line is reached, with the typewriter in question, this locking bar is swung forwardly intothe dotted line position of Fig. 2, beneath catches or hooks 27 on the key levers, and the key levers are prevented from downward movement .by the locking bar. A link 28 connects the locking bar to the body of theyoke,that end of the link adjacent to, the locking bar being slotted, asshown at 29,.so-that the locking bar may have a limitedmovementwith respect to the link for a purpose to bepresently described. It will be evident that when the locking bar is moved forwardly into the dotted line position of Fig. 2 the link will be moved in the same direction and will swing the yoke to cause the extensions 24 to engage the cams 25 and release the pawls, and the spring 2 will immediately come into operation to; return the carriage. Means 1s provlded 1n connection wlth the usual release lever for the carriage for releasing "the pawls 16 and 17 and themotor 2. The release lever 30 is connected to the yoke by a link 31. This link has a notch 32 at its upper end which engages a rod 33 forming a part of the release mechanism,

and the opposite end of the link has an inclined slot or passage 34 in which the yoke body 21 engages. The upper end of the slot or passage is open in order that it may be engaged with the yoke body, and. the link is guided by headed pins 35 on the typewriter, which engage longitudinally extending slots in the link. This slot or passage 3& is so.

inclined t when the rear end of the lever 30 is moved upwardly to release the carriage the link 31 will be moved upwardly, and the body ofthe yokewillbe pushed forwardly, thusswingingup the extensions 24: and releasing the pawls. With this arrangement,-whenever the carriage is released at any point in its travel, the motor 2 will also be released to permit the typist to return the carriage. i i

When the carriage moves to the left and the end ofthe writing line is reached, the key locking mechanism, that is, the locking bar 26, is moved forwardly to locking position. This is brought about bya lug 36 on the carriage, which rides upon a species of caniplate 37 which is adjustably connected with a rack bar 38 on the typewriter frame.

A shaft 39 is then oscillated and this shaft" is connected with the locking bar in such manner that the lockingbar will be moved forwardly. When, however, the carriage begins to return to the right, at once the lug 3.6 passes'off the cainplate 37,the locking bar is released, that is, the said bar is swung rearwardly, and wereno means provided the pawls 16 and 17 would be permitted to engage the ratchet wheel15, checking the.

' leasedbythe movement of the carriage as it reaches the end off-its movement to the right, and precisely the same mechanism is prowided for oscillating the shaft 39 to release the locking; lever as that which is provided to release the key lockingbar. The said} mechanism comprises a cam plate 43 which;

isv adjustabl connected with the rack bar 38.

, This camp ate is a part of a slideal which is mounted to slide upon the'shaft 39, and

v is locked to the rack bar at any desired point by means of a lever 45, the said lever having.

a toothed pawl 46 for engaging the rack bar to hold the slide at the point desired. By'this means the cam plate 43 may be placed wherever desired at any point in the movement of the travel of the. carriage. The shaft 39 has an arm 47, and this; arm hasan,angular portion which engages the outer end of the lever 40 in such manner that when the shaft 39 is oscillated by the downward movement of the rack bar 38 the angular portion will swing the lever to disengage i it 'fromth'e notch 42. The lever 40 engages the notch by gravity, thepivotal connecincense tion being nearer that end of the lever engaged by the arm .47 than that endwhichengages the link 28.

The operation of the above described mechanism is as follows: The parts being properly arranged and the spring 2 under proper tension, which may be brought about by means of the crank 6, the typewriter is operated in-the usual manner'to write. As the keys are operated the spring 2 isplaoed' under tension, the wheel 15 advancing one tooth for every key struck and for eaehmove ment of the'spacing' bar. As the carriage nears the end of its travel to the'left, the lug 36 will engage the cam plate 37 and the locking bar 26 will be swung into locking position, carrying forward. the link 28, and swinging the yoke 21,-22 to release the pawls. The link 28 is locked in'its forward.

position, and, with the pawls released; by

means of the locking lever 40, the motor '2' nowmoves the carriageto the right, that is, returns it to commencing position, the lug 36 engages the cam plates?) and oscillates the shaft 39 to cause the arm 47 to release the locking lever 40, thus permitting the link v to move forward and the yoke to move into inoperative position. The springs 20-have sufficient resiliency to return the link and ,yoke to normal inoperative position. In

case it should be desired to return the carriage before reaching the'end of the line, or

-in case'it is desired to move the carriage in either direction, that is, to releasevit for any purpose, it is released in the usual manner by swinging the lever 30 which is the release key for the carriage. When, this key is v swung the link 31 swings the yoke 21-22 to release the pawls. 40

The usual line spacing mechanism 48 is utilized the present case. A sleeve i9 is journaled on the carriage at 50, and this sllfeve has at one end a radial arm 51. At t e o gage the said line spacing mechanism 48 to "to the. left. An elbow lever 53 is pivoted to 51 and the upstanding arm of the elbow operate the same when the arm 51 is'swung a fixed portion of the typewriter, as indicated at 54, andvone of the arms'of the elbow lever normally rests upon a fixed portion 55 The other arm of the elbow lever extends upwardly into. the path of movement of the arm 51, and when of the typewriter frame.

the carriage isjpassing to-the left the arm lever- 53 will move idly past each other.-

When,however,' the carriage starts tomove.

toward the right, the arm 51, which has passed the upstanding arm of the lever, will engage behind the said upstanding arm and i I since this upstanding arm of the elbow cannot swing in the opposite direction the lever arm 51 must swi as indicated in dotted lines'in Fig. 6, an the arm 52 will operate posite endit has a tangential arm 52, I and t istangential arm is in position to en- 'of the keys at the end of a line the line spacing mechanism of the typewriter.

The horizontal arm of the elbow lever 53 holds the parts in the position shown in Fig. 7 by gravity. After the carriage begins its reverse movement to commencing position the line spacing mechanism will be operated to advance the paper another line, and. Whether'this advancement is one space, two spaces or three spaces, it iscontrolled by the Eli line'spacing mechanism in the usual manner,

The locking bar 26 is moved beneath the catches or hooks 27 by an arm 60 depending move the locking bar 26 beneath the hooks for catches 27 I claim:

1. In combination with spring for returnin controlled by the striking-of the keys dura typewriter, a

ing writing for. placing the spring under tension, means for restrainin the operation of the spring, means for re easing the restraining means controlled by it e locking of thekeys at the end of the line, and auxiliarylocking means for holdingthe restraining means ,in released position when the keys are unlocked and. controlled to release the carriage, means at the end'of the returnmovement of the Z carriage.

2. In combination with a typewriter, means for returning the carriage, meansdor restraining the operation of the returning means, and means controlled by; the key locking means at the end of a line for releasin therestraining means. t

3. Iii combination wi'h atypew ter and the carriage release, means for returning the carriage, means for restraining the 'op eration' of the returning means, means con- 1 trolled by the key locking means at the end,

of a line for releasing therestraining means, and means controlled by the carriage release for releasing the restraining race 5.

4, In combination with a ewriter, a

spring for returning the carriage, means controlled by the depression of the keys for plac- 2 a ingthe spring under tensiommeans for restraining the operation of the returning spring, and means controlled by the looking for relefi ing the restraining means.

5. In combination with a ty ewriter and the carriage release, a spring tor returning the carriage, means controlled bythe depression of the keys for placing the spring .under tension, means for restraining the operation of the returning spring, means con trolled by the locking of the keys at the end i of a line for releasing the restraining means,

' the carriage release, a spring movement of the keys and spacing bar for thereof, a common I the spring 'when the keys are locked at the y end of a line, a connection between the said 1 means and the release 'key for the carriage for operating the said means to releasethe 7 spring wiliary means for holding the said commonf' releasing means in 0' era'tivfe position after when the carriagefis released, aux

1 the keys are unloeke when the carriage begins to return, and mean controlled by the carriage as it reaohes' the end of its movement toward commencing position for releasnig the said auxlhary means.

7; n comblnatlon with a typewriter,

3 means for returning the carriage, means for operation of the returning restraining the means; means controlled by the key locking means at the end of a line for releasing the restraining means, and means controlled by the movement of the carriage as it begins its return movement forvoperating the line spacing mechanism.

8 In combination wlt-h a typewriter, means for returmng the carriage, means for restraining the operation of the returning means, means controlled by the key locking means at" the end of a line for releasing the restraining means, means controlled by the carriage releasefor releasing the restraming means, and means controlled by the move ment of the carria e as it commences its return movement or ioperating the line spacing mechanism.

EARL PERCIVAL UQURTENAY LOMAS.

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