US995150A

US995150A - Type-writing machine.

Info

Publication number: US995150A
Application number: US14796703A
Authority: US
Inventors: William J Kauffman
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-03-16
Filing date: 1903-03-16
Publication date: 1911-06-13
Anticipated expiration: 1928-06-13

Description

w. J. KAUFPMAN.

TYPE WRITING MAGHINE.

APPLICATION FILED MAR. 16, 1903.

Patentd June 13, 1911.

2 SHEETSSHEBT 1.

INVENTOR M fiq/ aw M9 W. J. KAUPPMAN.

TYPE WRITING MACHINE.

APPLICATION FILED MAR 16, 1903.

L 2 m m I E 3 w 1 m m Mm m N d 2 U 6 m .WN

, mm m w QM H, V im m5 WILLIAM J. KAUFFMAN, OF CLEVELAND, OHIO.

TYPE VJRITING MACHINE;

coarse.

To all whom it may concern:

Be it known that I, WlLLIAM J. lAU]3:F- MAN, of Cleveland, Cuyahoga county, Ohio,

. have invented a new and useful Type-Writing Machine, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is an end elevation partly broken away illustrating the connections for movwriting machines and is designed to simplify and improve the mechanism for shifting the roller vertically.

In the drawings, 2 represents the carriage frame which is supported and moved in the usual way upon the slide-ways 3, 8. The vertical end supports 4, 4; of the carriage are vertically slotted to receive vertically moving

slides

5, 5, the lower ends of which are secured together by an intermediate connecting shaft 6, forming a frame in which the shaft 82 of the platen 66 is supported. The lower ends of the slides 5 are provided with shallow curved recesses which rest upon a transverse shaft 7 extending across the machine below the carriage and supported upon links 8, 8 which project up.-

wardly and are forl ed at their upper ends to engage circumferential recesses near the ends of the shaft 7 as shown.

In order to give'a long uniform bearing for the platen frame 1 provide the entire shaft 6 with a longitudinal bottom recess similar to those at the lower ends of the slides 5, thus giving a firm support for the platen in all positions. The links 8 are pivoted at their lower ends to horizontally extending end levers 9, 9 which are rigidly secured to a rock-shaft 10 extending across the front of the machine above the keylevers.

In order to rock the shaft 10 and thus move the platen frame vertically I provide special keys at the ends of the bank, two of which at one end of the bank raise or lower the roller, while the two at the other end of the bank raise or lower and automatically lock the roller in the adjusted position.

Referring to the right hand shifting mechanism which is adapted to unlock and face of a fired cam plate 15. The upper part of this cam plate cohtains an inclined slot, while the lower part is curved on 'a.

radius whose center is substantially the ful- Speciflcati'on of Letters Patent. Patented 31111013, 1911, 2

Application filed March 16, 1903. Serial No. 147,967.

crum of the key lever. On depressing the lever 11, the engagement of the pin 14 with the curved surface of the fixed cam plate 15 will cause a forward sliding movement of the slide 13. The screws 16, 16 pass through slots in the lever and are secured in the vided with a small upwardly projecting hooked lug 17 which when the slide is drawn forwardly engages the upper side of a in or stud. 18 secured to a lever arm 19, which is rigidly secured to a transverse rock-shaft 20. The shaft 20 is provided with a central slide, and the rear end of the slide is proforwardly projecting lever 21 (Fig.4) hav---- ing a loose pivotal connection at 22 with the lever 23 secured to the rock-shaft 10. A lever-arm 2a is preferably integral with the lever 23, and carries an adjustable screw'24 engaging a plunger 25 which is acted upon by a spring 26.

It is evident that when the lever 11 is depressed the slide acting upon the studor pin 18 by meansof its latch or lug 17 willshaft 10 in the opposite direction, thus do pressing the carriage roller. In this connection, it will be explained that the slide is carnmed forward by a'construction similar to 14:, 15 of the lever 11.

The carriage roller is normally locked in its adjusted position and I provide for this purpose the catch-levers 27, each of which has in its upper portion three notches or recesses each adapted to engage an inwardly projecting pin 28 on the link 8. The levers 27 at the opposite sides of the machine are pivotally connected to the frame of the machine 'bythe'screws 96. The downwardly projecting arm 29 of the lever 27 is provided with a rear cam face over which project .the extended portions of the pins 94 on each iofithelever-slides which move in the slots 94 in the levers.

As the key-lever is deressed the movement of the slide swings the ever 27' and unlocks the platen after which the'continued movenient shifts it vertically 'wh i'ch eaierts a constant lift thereon. lever is provided at its ends with oppositely through the lever system. roller is lifted to its normal position after The carriage depressing, by the spring 26 acting upon the rock-shaft 10. The raising and depressing 'leversa're kept in position and returned to normal position by means of a lever 30 which has two different fulcrums 3t, 3%, the one fulcrum being normally in contact with a lifting lever, and the other normally in "contactwith a depressing lever, on either of .which it 'may swing; this lever 3 0 1s supl 'ported' byaplvotal[connection with a rod 25" or plunger 3l1ihaving an upper adjustable head32 acted upon by a spiral spring 38 The [projecting pins 34, one of which engages 3 7 '}ing' lever. Thelocking levers are returned the lifting lever. and the other the depress 'to their normal 'locking position whenever Thegthirdlever shown in Figs. 1 and 3 .released by mean s of spring-pressed plungers Bfi mounted cylindrical cavities in the frames andjpressed forward by spr ngs 36.

is one ofa series of type bar levers and is fulcrui'ned "upon the bar 12 at the rear of I tion. It will be noted that instead of moving theplaten frame vertically to adjust the position of the platen relatively to the type, I do not move the carriage itself, but only the paper carrying platen and its attachments. This gives a great advantage in ease of action and light touch compared with cases where the entire weight of the carriage is lifted.

,In order to insure a parallel movement for the lifting shaft 7 I provide a special parallel motion mechanism therefor. I have shown this mechanism as consisting of two U-shaped arn1s 37 having their inner ends rigidly secured ends of the shaft 7.

the shaft 7 is moved vertically each end is turned to exactly the same extent by reason of the levers 37, and the ends are thus compelled to move to the same extent in either direction. The arrangement of the parallel motion device may be varied as desired. The curve of the outer face of the arm 37 is struck from the center of the shaft 7 as a radius, thus giving a true parallel motion to the shaft.

The advantages of my invention result from the simplifying of the machine and reducing the number of parts; from the lifting of the platen without lifting the carriage, thus giving an easy action and in raising and lowering the roller. The mechanism for raising and lowering the carriage roller is simplified and a single spring device acts upon both of the shifting levers at either end of the back of keys.

l. A typewriting machine having a longitudinally movable carriage, said carriage-y:

having a vertical slot in each end thereof, a U-shaped platen frame, the ends of the platen frame being arranged to slide in the slots in the carriage, a platen journaled in the machine, said rod forminga support'for the bottom bar of the platen frame, and means to raise and lower the rod to raise and lower the platen frame and platen in the carriage; substantially as described.

2. A typewriting machine having a longitudinally movable carriage, said carriage having a vertical slot in each end thereof, a U-shaped platen frame, the ends of the platen frame being arranged to slide in the slots in the carriage, a platen journaled in said frame, a pair of links pivoted to the frame of the machine, a rod mounted between said links, said rod forming the support for the bottom bar of the platen frame, and means to raise and lower the rod to raise and lower the platen frame in the carriage; substantially as described.

3. A typewriting machine havinga longitudinally movable carriage, said carriage having a vertical slot in each end thereof, a U-shaped platen frame, the ends of the platen frame being arranged to slide in the slots in the carriage, a platen journaled in said frame, a rod mounted on the frame of the machine, said rod forming a supportfor the bottom bar of the platen frame, means to raise and lower the rod to raise and lower said frame, a rod mounted on the frameof.

the platen frame and platen in the carriage, and means to lock the carriage in its shifted position; substantially as described. A

4. A typewriting machine having a longitudinally movable carriage, said carriage having a vertical slot in each end thereof, a U-shaped platen frame, the ends of the platen frame being arranged to slide in the slots in the carriage, a platen journaled in said frame, a rod having a groove mounted on the frame of the machine, the groove in the rod forming a seat for the bottom bar of the platen frame, and means to raise and lower the rod to raise and lowerthe platen frame in the carriage.

In testimony whereof, I have hereunto set my hand.

WILLIAM J. KAUFFMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.