US747712A - Type-writing machine. - Google Patents

Description

PATEN TED DEC. 22, 1903.

' 0. F. HOPKINS.

TYPE WRITING MACHINE.

APPLICATION FILED MAY 15, 1902.

N0 MODEL.

Tu: Noaius PETERS ch. Pnoroumq, WASHINGTON L)v c.

UNITED STATES Patented December 22, 1903.

PATENT OFFICE.

CLARENCE F. HOPKINS, OF NEW YORK ,'N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, T0 ELLIOTT-FISHER COMPANY, A CORPORATION OF DELAWARE.

v TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 747,712, dated December 22, 1903.

Application filed May I5, 1902.

To all whom it may concern:

Be it known that I, CLARENCE F. HOPKINS, of New York city, county of New York, and State of New York, have invented a new and useful Improvement in Type -Writ ing Machines, of which the following'is a specification.

My invention relates to that class of typewriting machines wherein a flat platen is employed to sustain the paper beneath the writing mechanism movable horizontally thereover for the purposes of letter and line spacing, as inthe Elliott & Hatch machine of commerce represented as to its general organization in Letters Patent to Hatch and Hillard No. 620,125. In this class of machines the writing mechanism is sustained by an open rectangular frame overlying the platen and or printing as the latter progresses.

adapted to be raised momentarily thereover, so that the edges of the paper will be clamped between theplaten and the side bars of the frame. In practice it is found desirable to provide additional means for confining or holding down the paper, particularly when a number of copies are to be produced by the employment of a number of paper sheets and intermediate carbon-sheets.

My invention relates to a spring-actuated pressure device or clamp lying transversely of the platen and movable along the same from one end toward the other in order that the pressure may be applied at difierent points and in the immediate vicinity of the writing In its preferred form this pressure device is attachedv to the movable frame, which carries the writing mechanism, so that as the latter is advanced line by line the pressure device will be moved to correspond.

Referring to the drawings, Figure l is a top plan view of the framework of the machine provided with my improvement, the writing mechanism being omitted to expose the parts thereunder. Fig. 2is a vertical section on the line 2 2 of the preceding figure with the writing mechanism indicated in dottedlines.

Referring to the accompanying drawings, A represents the fiat bed or platen on which Serial No.107a05. (Nb model.)

chine E, which is mounted thereon, to travellaterally for letter and word spacing. The details of thewriting mechanism and the de vices for feeding the same on the frame D forletter and Word spacing and for moving the. frame D for-line-spacing nary construction. I

F represents my pressure device, consisting' in the present instance of a transverse bar lying within the frame D in position to bear upon the platen or the paper thereon. This bar has its ends bent at right angles and may all be of ordi-' mounted on a pivot-rod G, sustained in plates or ears H, secured to the frame D, this arrangement permitting the bar F to rise and fall, allowing it to travel endwise of the platen with the frame D and the writing mechanism, so that it will at all times bear upon the paper near the line on which the;

printing is being effected. In order that the pressure device F may act the more efiectively and with the pressure requisite to hold down a number of sheets in compact form, a spring I, encircling the pivotrod G, is ar-. ranged to bear at one end on the frame D and at the opposite end on the pressure device, so that it exerts a sufficient pressure to keep the loose or fluffy masses of paper down in compact form, that the printing and manifolding operations may take place in a satisfactory manner.

What I claim as my invention is 1. In a. type-writer, a flat platen to sustain the paper and an overlying writing mechanism, in combination with a spring-actuated pressure device to act upon the paper, movable lengthwise of the platen.

2. In atype-writing machine, the combination of the platen, an overlying traveling frame D with the writing mechanism sustained thereon, and a spring-actuated pressure device attached to said frame and arranged to bear upon the paper beneath.

3. In a type-writing machine, the combination of the following elements: a Hat platen, a type-writing mechanism movable thereover, means for confining the paper removably on the platen, and a transverse yielding pressure device, adjustable lengthwise of the platen, to aid in confining the paper thereon.

4. In a type-Writing machine, the combination of the following elements: a flat platen, a type-writing mechanism movable thereover, means for confining the paper immoxL-l ably on the platen, and a transverse yielding CLARENCE F. HOPKINS.

Witnesses:

WM. A. MURRAY,

0. J. S. ANDERSON.

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