US1106924A

US1106924A - Type-writing machine.

Info

Publication number: US1106924A
Application number: US78193413A
Authority: US
Inventors: Herbert A Carhart
Original assignee: Remington Typewriter Co
Current assignee: Remington Typewriter Co
Priority date: 1913-07-30
Filing date: 1913-07-30
Publication date: 1914-08-11
Anticipated expiration: 1931-08-11

Description

' H. A. GARHART. TYPE WRITING MACHINE.

APPLICATION FILED JULY 30, 1-913.

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Patented Aug. 11, 1914:;

INVEN QR HIEATTFIFQNEY @TATES PATENT HERBERT A. GAR/HART, 0F SYRACUSE, NEW YORK, ASSIGNOR TO REMINGTON TYPE- WIRITER COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEVT YORK.

TYPE-WRITING MACHINE.

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Specification of Letters Patent.

Application filed July 30, 1913. Serial No. 781,934.

To all whom it may concern Be it known that I, HERBERT A. CnRI-IART, citizen of the United States, and resident of Syracuse, in the county of Onondaga and State of New York, have invented certaln new and useful Improvements in Type- Writing Machines, of which the following is a specification.

My invention relates prlncipally to type writing machines although it may be applicable to other printing machines that have a rotary platen or correspondingdevice My invention has for its principal olo ect to provide improved line space mechanlsm for such machines. I have had especially in mind the provision of line space mechanism that should be simple and inexpensive but thoroughly good and efiicient.

In the accompanying drawings, F lgure 1 is a right-hand end elevation of the car- -.riage and some of the associated parts of a typewriting machine having my invention embodied therein. Fig. 2 is a top plan view of the right-hand end of said carriage. Fig. 3 is a view in elevation looking in the direction of the arrow a, Fig. 2. a view more or less diagrammatic in character and consisting of a lefthand elevatlon, partly in section, about on the line mm of Fig. 2 and partly in section outside of the right-hand end bracket of the carriage. This view shows the parts at the completion of an operation of the line space mechanism. Figs. 5 and 6 are fragmentary views in elevation looking in the direction of the arrow 6 in Fig. 2. Fig. 5 shows the mechanism set for single spacing and Fig. 6 for double spacing. Figs. 4, 5 and 6 are on an enlarged scale about double that of the other figures. In all of the figures parts have been omitted or broken away as has been found convenient.

My invention is here shown applied to the roller platen of a front-strike typewriter, most of which typewriter has not been shown in the drawing as it isnot necessary to an understanding of the present invention and as its precise construction can be varied without affecting the invention. Said machine comprises stationary framework 1 on which is mounted a stationary carriage rail 2 having ball bearing grooves in its front and rear edges which face like grooves in the carriage bar or bars 3. The front and rear pairs of grooves constitute Fig. 4 is ball races for anti-friction balls 4 sothat the carriage is adapted to travel in a right and left directlon across the machine. In

the typewriter, this carriage is, of course,

fed by a spring drum and controlled by an escapement; and in other machines it can be fed in any suitable way. Said carriage also comprises two end brackets 5, only the righthand one of which is shown in the drawing, 1

and in said brackets there is journaled the shaft 6 of a roller platen. 7, said shaft as shown in the present instance lying in open slots 8 formed in the brackets 5, but the manner in which the shaft is journaled in the brackets can be varied. In the present instance the shaft is prevented from risin out of each of the slots by reason of the hub 9 of the finger wheel 10, which hub surrounds said shaft at the end thereof and is.

mounting the platen, is not of my inven tion.

The platen is provided with a line space ratchet wheel 13, said wheel in the present instance and preferably being mounted on the right-hand end of said platen. The mechanism for operating said line space Patented Aug. ill, 119314.

wheel comprises a vertical axle 14 pivoted opposite the right-hand end of the platen .and having its axis lying across the end of said platen. Said axle stands between upper and lower lugs or ears 15 projecting from the right-hand face of the bracket '5 and said axle can be pivoted in said ears in any suitable way. In the present instance the axle is made hollow and a long pivot screw 16 is inserted through a hole in the upper ear and through the entire length of the axle and is threaded into the lower ear. This axle is made of suitable length so as to give a wide bearing for the line space lever 17 which lever, as shown, has a long forwardly extending arm, the front end of which is bent up to form a handle 18.

As shown in the present instance the lever 17 is stamped out of sheet metal which is apot "erwise constructed.

- wardly directed arm above referred to, said lever includes a shorter arm 20 that projects as shown in Figs. 1 and 2 through an opening 2}. in the bracket 5, the general direction oi sa1d arm'being,' as shown in Fig. 2, toward the left and rear. As best shown in Fig. 3, the inner end of the arm 20 is bent upward to form a flange 22 having its inner face vertical and substantially perpendicular to a radius passin through the axis of the lever. Against this vertical face or abrupt end of the lever the line space pawl 23 is pivoted on a pivot screw 24 which is screwed into the flange 22. .It will, of course, be understood that a suitable vertical surface against which to pivot the pawl, can be formed in other ways than by bending up a sheet metal lever arm. The pawl .23 has an ap iroximately horizontal arm 25 best shown in igs. 4, 5 and 6 and adapted for engagement with the teeth of the ratchet wheel 13. The pawl is held up in operative position by means of any suitable spring 26, said spring in the present instance being shown coiled about a screw 27threaded into the arm 20 from below and said spring at one end hooked up against the rear edge of said arm andat the other end engaging a sort of heel 28 of the pawl.

The extent of line spacing movement imparted to the platen by the pawl is controlled at b y means of a regulator 30 comprising an adjustable stop for limiting the upward mo tion of the pawl under the impulse of the spring 26. This regulator can be constructed in various'ways but the one shown in the drawing is of extreme simplicity and is effective. This consists of a device stamped outof sheet metal and including a horizontal part or bar pivoted at one end at 31 in a suitable hole in the axle 14 and at the other end in a hole 32 in the flange 22, said hole being of a diameter considerably greater than the thickness of the sheetmetal of which the regulator is made. The end of said regulator that projects through said hole is made of a width adapted to have a turning fit in said hole, the remainder of the bar being.

wider so as to form a shoulder to prevent endwise motion of said bar. Said regulator also comprises an upstanding arm terminating in a finger piece 33, said upstanding arm having an oif-set bend therein, as shown, for the sake of avoiding interference with certain parts of the framework of the carriage. For convenience of reference I have designated the positions of three of the teeth of the ratchet wheel 13 with the letters m, n and 0. When the regulator 30 stands in the position shown in Figs. .4 and 5 it engages the line space pawl edgewise and holds the upper surface of said pawl on a level with the bottom of the hole 32, in which position the pawl, when operated, will engage the ratchet tooth a. When the device is turned down in the position shown in Fig. 6 it engages flatwise with the pawl and said pawl is allowed to be moved by its spring to a higher position in which it is adapted, when the line space lever is operated, to engage the tooth m of the line space wheel. When the line space lever is operated the pawl moves to t e position shown in Fig. 4 which is the ratchet tooth positionwhich in the drawing I have marked 0. When the regulater is set as shown in Figs. 4 and 5, an operation of the line space lever moves the ratchet wheel. one tooth space and when it is set as shown in Fig. 6, said pawl moves the ratchet wheel two tooth spaces. The line space lever 17 is controlled by restoring spring 34 which is hereshown coiled a few times around the axle 14 and at one end hooked up about the edge of the lever 17 and at the other end pressed against the face of the bracket 5.

The detent for the line space wheel, comprises a detent roller 35'pivoted in cars of a flat spring 36 extending from said roller toward the rear and bent back in U-shape and formed with an off-set part 37 which is secured by screws 38 to the top of the bracket 5.

Various changes can be made in the de tails of construction and arrangement without departing from my invention.

What I claim as new and desire to secure by Letters Patent, is 1 1. The combination of a platen, a line spacing ratchet wheel having peripheral teeth, a line space lever pivoted on a vertical axis that lies across and beyond the end of said platen, said lever having an arm thereon extending inward near the under part of said ratchet wheel and-formed with an abrupt end, a line spacing pawl pivoted against said abrupt end on a horizontal pivot and adapted when the lever is operated to engage one of the lower teeth of said ratchet wheel and push said toothforward, and a regulating device pivoted to said line space lever and arranged when.

abrupt end, a line spacing pawl pivoted against said abrupt end on a horizontal pivot and adapted when the lever is operated to engage one of the lower teeth of of a piece of flat said ratchet wheel and push said tooth forward, a spring acting on said pawl to throw its free end up toward the ratchet wheel, and an adjustable stop carried by said line space lever to limit the motion of said pawl under the impulse of saidsprin and thereby to predetermine which one 0% a plurality of ratchet wheel teeth shall be engaged by said pawl. v

3. The combination of a platen, a line spacing ratchet wheel, a line space lever pivoted on a vertical axis that lies across and beyond the end of said platen, said lever having an .arm thereon extending in ward near the under part of said ratchet wheel and formed with an. abrupt end, a line spacing pawl pivoted against said abrupt end and adapted when the lever is operated to engage one of the lower teeth of said ratchet wheel and push said tooth forward, a spring acting .on said pawl to throw its free end up toward the ratchet wheel, and an adjustable stop carried by said line space lever to limit the motion of saidpawl under the impulse of said spring and thereby to predetermine which one of a plurality of ratchet wheel teeth shall be engaged by said pawl, said stop consisting sheet metal adapted to be turned in a hole, wider than the thickness of said metal whereby said stop holds the pawl in a lower position when the stop is set edgewise than when it is set flatwise.

4. The combination of a platen, a platen frame comprising end pieces in which said platen is journaled, a line space lever pivoted on a vertical-axis on the outside of one of'said end pieces and having an arm thereon projecting throng ga fopening in said end piece, and. said arm havinga fiat face perpendicular to the radius of said 'arm, a

line space pawl pivoted on said'arm against said flat face, and a line space to be engaged bysaid pawl. i

an edge th ereoI engages wheel adapted 5. The combination with a platen and its line space wheel, of an angular line space lever consisting of a piece of sheet'metal cut out in angular form and having its forward end bent into a finger piece or handle and having its shorter arm bent up at right angles to a radius of said arm; and a line space pawl pivoted on said bent up end.

6 The combination of a line space wheel,

a line space pawl, and a pivoted regulator for said pawl comprising a bar having a flat face and adjustable so that in one position thereof said flat face engages said pawl and in another position thereof an edge of said bar engages said pawl.

7. The combination of a line space wheel, a line space pawl, and a regulator for said pawl including a sheet metal .bar pivoted in a hole the diameter of which is greater than the thickness of the bar and so disposed that when said bar is adjusted in one position one of the flat faces thereof engages said pawl and when said bar is turned to another position an edge thereof engages said pawl.

8. The combination of a line space wheel, a line space pawl normally disengaged from said wheel, a support to which said pawl is pivoted, and a regulator mounted in said support and consisting of a piece of sheet metal having a part thereof pivoted in a hole in said support larger than the thickness of the metal and so disposed that in one position of said regulator one of the flat faces thereof engages said pawl and when said regulator is turned to another position said pawl.

Signed at Syracuse, in the county of Onondaga, and State of New York, this 25th day of July A. D. 1913.

HERBERT A. CARHART. Witnesses: I

REGINALD G". B. Wnsr, .E. N. HARRIS.