US515710A

US515710A - Type-writing machine

Info

Publication number: US515710A
Authority: US
Publication date: 1894-02-27
Anticipated expiration: 1911-02-27

Description

(No Model.) 3 Sheets-Sheet I.

A. LARSBN.

TYPE WRITING MACHINE.

Patented Peb. 27, 1894.

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(No Model.)

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TYPE WRITING MACHINE. l No. 515,710. y Patented Feb. 27, 1894.. f Abe" 16" :.f e

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A LARSEN TYPE WRITING MACHINE.

Patented Feb. 27, 1894.

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UNITED STAT-Es PATENT OFFICE.

AUGUST LARSEN, OF SYRAOUSE, NEW YORK, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OF THREE-FOURTHS TO LEONARD G. ABBOTT, HENRY M. CHASE, AND FRANK H. IVELLS, OF SAME PLACE, AND ERASTUS JONES, OF HOMER, NEW YORK. y

TYPE-WRITING MACHINE.

SPEUIFIGATION formingpart of Letters Patent No. 515,710, dated February 27, '1894.

Application tiled Mey 11, 1898. Serial No. 473,816. (No model.)

To all whom it may concern: cally return to its starting position. Said Be it known that I, AUGUST LARSEN, of Syramotor, as well as the propelling mechancuse, in the county of Onondaga, in the State ism and tripping mechanism is susceptible of 5o of New York, have invented new and useful many modifications and I therefore do not 5 Improvements in Type-Writing Machines, of wish to be limited specifically to the construe.- which the following, taken in connection with tion and combination of parts hereinafter dethe accompanying drawings, is a full, clear, scribed, which, however, represents my preand exact description. ferred plans of construction. 55

This invention relates to the class of type For the motor for automatically returning m writing machines in which the paper carthecarriage--B-Iprefertoemploythe drum riage is automatically returned to its starting or wheel -D- which is pivoted on a spinposition and propelled during the operation dle or gudgeon -aprojecting from the of writing by means of mechanism actuated frame -A- at or near the side from which 6o by the printing keys, and the invention conthe carriage is started in the process of writ- 15 sists in an improved construction and combiing. A coil-spring -D- is attached at one nation of parts as hereinafter described and end to the spindle -cand at the opposite set forth in the claims. end to the periphery of the drum. A cord In the annexed drawings, Figure 1 is a pla --ais Wound upon and secured at one end 65 view of a type-Writing machine embodying to the drum and at the opposite end to the zo my invention, portions thereof being either carriage. The spring -D is Wound in omitted or merely indicated by dotted lines such a direction as to resist the draft of the to more clearly show the essential parts of my cord -oin the operation of moving the invention. Fig. 2 is a rear face view of the carriage from its starting position. Y 7o same. Fig. 3 is a vertical transverse section To compensate for the increase in the ten- 2 5 on line 03,112, in Fig. l. Fig. et is avertical secsion of the spring during the movement of tion on line y, y, in Fig. 1 viewed toward the the carriage from its starting position I pivot rear of the machine. the drum eccentrically so as to present grad- Similar letters of reference indicate correually increasing radii to the portion of the 75 sponding parts. drum paying out the cord -a. The car- 3o A represents the frame of the type-writriage -B- rides on the usual tracks or ways ing machine, B the paper carriage, and BB- which guide it in its movements. O O-the printing keys, all of which parts For propelling the carriage -B- I prefer are arranged in the usual and well known to employ a suitable pawl and ratchet mech- So manner, andare essential to the application anism operated by the printing keys, and

3 5 of my invention. preferably attach the ratchet -R- to top of The paper-carriage -B- I cause to be the rear portion of the carriage. drawn automatically to its starting position To the adjacent portion of the frame -A- by means of a suitable motor connected to the or a bracket -#A- secured thereto I pivot 85 machine, and move said carriage in opposithe rockarm -bto the free end of which 4o tion to the motor by suitable propelling mechis pivoted the primary pawl -bwhich is anism operated by the printing keys-O-C- held in engagement with the ratchet -R- or spacing keys -C- as may be required in and at the same time drawn in opposite dithe process of writing. To arrest the advance rection from that of the draft of the cord 9o movement of the carriage when desired I ern- -d-, by means of the spiral spring d- 45 ploy suitable tripping mechanism which reconnectedat one end to the top of the pawl leases the carriage from the propelling mechand at the opposite end to the :frame at or anism and allows the carriage to automatinear the side farthest from the starting po* sition of the carriage. To the axis or shaft of the rock-arm -Z is also fastened another arm -bwhich is connected by a rod -bmwith one of the limbs of an elbowlever -cpivoted to the lower portion of the frame -A-. The other limb of said lever is pivoted to a longitudinally sliding bar -cwhich receives a reciprocating motion in common from all the printingkeys-C-C by means of cams C- on the horizontal shafts of said keys working in slots c in the bar -o. Hence in operating any one of the said printing keys the lever -creceives an oscillatory motion which, by means of the rod -h and arm -h, is transmitted to the rock-arm -h-, the motion of which latter, together with the aid of the spring -cZ-, causes the pawl -bto push the ratchet -R in opposition to the spring -D which latter tends to force the carriage -B toward its starting position.

The tripping mechanism for releasing the carriage from its propelling mechanism, I prefer to construct as follows: Under the primary pawl -h- I place a secondary pawl or to the bracket to which the primary pawl is pivoted. To the shaft or axis of said secondary pawl I attach a crank ewhich I connect with the bracket A by a spiral spring e" to normally hold the secondary pawl in engagement with the ratchet -R- and thus prevent the carriage from running back while the primary pawl -bis lifted out of the ratchet to obtain a new hold thereon.

To the base of the frame -A- I journal a shaft -fwhich extends from the front to the rear of the frame and has attached toits rear end an arm f the free end of which is cpnnected to the crank -c-by a rod To the front end of the shaft -f is attached an arm -g-, to the free end of which is pivotally connected a suitable key-lever 71,- supported in a convenient position on the frame A. By depressing said key-lever the shaft -fis turned and thus the arm -f is caused to draw down the crank --e-by the rod -f. Said movement of the crank lifts the secondary pawl -c out of the ratchet -R- and causes said pawl to also throw the primary pawl -b'- out of engagement with the ratchet. The carriage -B- is thus released from its propelling mechanism and in order to allow it to be f drawn back to its starting position by force To the carriage -B- is attached a cam -Z- which is in such la position as to strike the adjacent end of the detent -z'- when the carriage has arrived at its starting position. In striking said detent the cam pushes the same rearward and thereby causes the hook -1l to release the crank -ewhich is then immediately drawn up by the spring -e. This throws the secondary pawl -einto engagement with the ratchet -R-, and at the same time releases the primary pawl -bwhich also immediately drops into the ratchet. The propelling mechanism is thus again set for operating the carriage.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In combination with the frame and paper-carriage, a spring drawing the `.carriage to its starting position, a ratchet attached to the carriage, a rock-arm mounted on the frame, a primary pawl on said arm engaging the ratchet and moving the same in opposition to the aforesaid spring,a secondary pawl pivoted to the frame and engaging the ratchet under the primary pawl, a crank connected to said secondary pawl, a lever pivoted to the frame and actuated by the printing keys, a rod transmitting motion from said lever to the aforesaid rock-arm, a shaft pivoted to the base of the frame and extending from front to rear thereof, cranks on opposite ends of said shaft, a finger key operating the crank on the front end of the shaft, a rod connecting the rear crank with the .crank of the secondary pawl, and springs holding the pawls in engagement with the ratchet, as set forth.

2. In combination with the frame and -paper-carriage, a spring drawing the carriage to its starting position, a ratchet attached to the carriage, a rock-arm mounted on the frame and actuated by the printing keys, a primary pawl on said rock-arm engaging the ratchet, a secondary pawl pivoted to the frame and engaging the ratchet under thep-rimary pawl,

a crank connected to said secondary pawl, a key lever actuating said crank, a detent adapted to engage said crank, and a cam on the carriage throwing the detent out of engagement at the end of the return movement of the carriage, as set forth.

3. In combination with the frame-and paper-carriage, a spring drawing said carriage to its starting position, a ratchet attached to the carriage, a rock-arm mounted on the frame and actuated by the printing keys, a primary pawl on said rock-arm engaging the ratchet, a secondary pawl pivoted to the frame and engaging the ratchet under the primary pawl, a crank connected to the secondary pawl, a detent adapted to engage the crank and hold it in its depressed position, a cam on the carriage throwing the detent out of engagement at the end of the re- ICO y gale-,710

In testimony whereof I have hereunto signed my name this 27 th day of April, 1893.

AUGUST LARSEN. LL. sf!

Witnesses:

H. M. SEAMANS, C. L. BENDIXON.