US844666A - Type-writing machine. - Google Patents

Description

PATENTED FEB. 19, 1907.

P. T. DODGE. TYPE WRITING MACHINE.

APPLICATION FILED MAE. so; 1906.

PHILIP T. DODGE, OF BROOKLYN, NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Feb. 19, 1907.

Application fi led March 30,1906. Serra-1N0. 308,916.

To a w/wm in nut concern:

Be it known that l, PHILIP T. Done-E, a citizen of the United States, and a resident of borough of Brooklyn, county of Kings, and State of New York, have invented a new and useful Improvement in Type-WVriting Machines, of which the following is a speciiica tion This invention has reference to type-writing machines wherein the aper is supported on a cylindrical platen w ich is turned forward step by step for line-spacing as the successive lines are completed.

The object is to enable the operator with one finger to instantly turn the platen backward a definite distance in order that exponents or superior characters may be printed at a fixed level above the other characters in the same line and also to effect the instant return of the platen and paper to their normal positions when the manual device is released.

To this end it consists in combining with the platen and normally disengaged devices for turning the same forward step by step a normally engaged dog or pawl and fingerpiece for instantly turning the platen backward a definite distance and a spring for restoringthe parts instantly to their first positions when the finger-key is released. By means of these devices, which may be made in various forms, the operator is enabled to instantly adjust the paper with one hand so as to cause the printing of the superior characters in definite and uniform relations to the normal line, the other hand being left free to operate the printing-keys. In other words, the operator is enabled to effect the printing of superior characters in the exact positions required without appreciable loss of time and without material interruption of the ordinary printing operation.

In the drawings, Figure 1 represents an end elevation of a type-writer platen andcarriage with my improvement applied thereto in its preferred form. Fig. 2 is a top plan view of the same. Fig. 3 is an elevation of the parts shown in Fig. 1 viewed from the opposite side. Fi s. 4, 5, and 6 illustrate alternative or modi led constructions.

Referring to Figs. 1, 2, and 3, A represents the usual cylindrical platen mounted horizontally in a reciprocating carriage B, one end of which is shown in the drawin s. The platen is rovided at one end with t e usual ratcheteel 0, whereby it is turned forward step-by step through the action of a pawl E, carried by an arm I), swinging around the axis of the platen and actuated through a rod F. from a finger-key or other connection, as usual. The pawl Erests normally on a stationary underlying plate d, whereby it is held out of engagement with the ratchet-wheel in order to permit the platen to be rotated backward at any instant by my devices. G represents a detenting pawl or dog standing normally in engagement with the ratchet-wheel C for the purpose of holding the platen in the successive positions to which it is turnedv by the pawl E in order that the machine may print along the normal lines on the paper. In the present instance this rotating pawl G is in the form. of a springarm carrying at its free end a roll 9, which engages between the teeth of the ratchet-wheel. This spring-arm is secured at its opposite end firmly to an arm 9, connected to the carriage-frame by a pivot 9 the motion being limited by a stud g on the carriage. H represents an angular lever pivoted to the carriage at 7L, its forward end being provided with a finger-button 71 and its rear end arranged to bear at k against the detenting carryin g-arm g, as plainl x shown in the drawings. The detent or dog G remains constantly in engagement with the ratchet-wheel, resting in the notches between its teeth, riding from one notch. to another as the platen is turned forward, holding the platen and aper in the normal or printing positions. W hen it is requiredv to print a character above the-level of the others in the line, the button hf is depressed and the lever 11 caused to rock the arm 9 backward, thereby pulling the detent G backward while it retains its engagement with the ratchet-wheel, the effect being to turn the platen and paper backward a fixed predetermined distance. While the key is held down with the finger of one hand the operator actuates the printing-key of the machine with the other hand and then releases the key It. During thedepression of the key the dog H is flexed by the swinging movement of the arm g, and when the finger key or button is released the spring instantly resumes its original shape and turns the platen forward again to its normal printing position.

It is to be observedthat my contrivance acts to move the paper backward momentarily only and for a definite distance and to thereafter restore the paper instantly to its first position, and it is not to be confused with those adjusting devices by. which the forms of my contrivance, (shown in Figs. 4,

5, and 6,) it is to be understood that the ratchet-wheel will be used in connection with normally disengaged means for turning it forward step by step, as in the precedingfig LII'GS.

. with the lever.

Referring to Fig. 4, G represents my constantly engaged spring retaining dog secured-to a finger-key lever H, turning around the aXis of the platen. The end. of the pawl is provided with a roll which engages between the-teeth of the ratchet-wheel on the platen, as before. .It serves, as in the first instance, the double purpose of holding the platen as it is turned forward from one position to another, of effecting its instantaneous and definite movement in a backward direc tion, and'of finally turning it forward again to the first position.

In Fig. 5, G represents the detenting and reversing dog provided with a roller 9, as before, and pivoted at g to the lever H mounted to turn around the axis of the platen and provided with a finger-key at the front edge. A spiral g connects the pawl The motion of the lever is limited, as in Fig. 4, by studs 9 and if. The dog stands normally in the position shown in Fig. 5, locking the wheel C and the platen as they are turned forward from line to line. When the motion of the lever is reversed, the dog rotates the platen backward a definite distance.

In Fig. 6, H is a finger-lever pivoted at, if, its lower end being flexible and provider:

with a roller 9 to constantly engage the teeth of the ratchet-wheel C. The parts stand normally in the position shown. WVhen the platen is turned forward from line to line,

holds the platen in position, as in previous instances. When the forward end of the lever is depressed,i.ts rear end will rotate the platen in a rearward direction.

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

the roller engages the successive teeth and hold the platen after itis turned forward, a manual deviceadapted to move the detent and thereby turn the platen backward afixed distance, and a spring for restoring the de- .toturn the platen forward step by step, a detent constantly engaging the wheel to tentandcylinder instantly to their original positions. g v

3. In a type-writer, a platen provided with a toothed wheel C, in combination with a spring-detent G engaging the wheel at one end, a pivoted arm 9' to which the detent is rigidly secured at the opposite end, and a linger-lever H acting to swing the arm 9.

4. In a type-Writer, and in combination, a

cylindrical platen provided with a toothed wheel normaily free to be turned in either direction, a device normally engaging said wheel, spring connections tending to hold said device in a given position and acting to return it thereto, and. a finger-key arranged to move the devicerearward a definite disto turn the wheel and platen in a reverse direction, and a spring for automatically restoring the parts.

In. testimony whereof I hereunto hand, this 28th day of March, 1906, inthe presence of two attestingwitnesses.

F. M. EGGLESTON, IVALTER lilOBLARlD.

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