US771216A - Type-writing machine. - Google Patents

Description

No. 771,216. I PATENTED SEPT. 27, 1904.

B. G. STIGKNEY.

TYPE WRITING MACHINE.

APPLICATION FILED MAR. 19, 1904.

NO MODEL.

WITNESSES:

UNITED STATES Patented September 27, 1:01.

BURNHAM O. STICKNEY, OF ELIZABETH, NEW JERSEY.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 771,216, dated September 27, 1904. Original application filed December 16, 1902, Serial No. 135 ,361. Divided and this application filed March 19, 1904. Serial To all whom it may concern:

Be it known that I, BURNHAM G. STICKNEY, acitizen of the United States, residingin Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

This invention relates, primarily, to typewriting machines in which radially-disposed type-bars are arranged about a common printing-point and move one at a time to the printing position. These type-bars, especially in front-strike machines, are often closely arranged, so that in rapid operation there is liability of clashing, due largely to the fact that the type-bars are apt to rebound from the basket or cushion upon returning to normal position, thus getting into the path of a subsequently-operated type-bar.

The principal object of my invention, therefore, is to minimize the liability of the typebars to rebound in this manner.

In the accompanying drawings, Figure 1 is a sectional elevation showing a type-bar'and basket or pad of a front-strike writing-machine, although this form of basket is likewise adapted to under-strike machines. Fig. 2 is a sectional front elevation of a front-strike writing-machine of the kind indicated at Fig. 1. Fig. 3 shows, on a larger scale, the inner of the two coils or helices used in forming the basket seen at Figs. 1 and 2. Fig. 4 is an enlarged sectional view illustrating the construction of the flexible bar seen at Figs. 1 and 2 and forming a rest for the type-bars. Fig. 5 illustrates a modification.

1n the several views like signs denote like parts.

This application is a division of my application filed December 16, 1902, Serial No. 135,361.

The machine illustrated is of the front-strike variety. Type-bars 22, carrying types 2, lie

horizontally in front of and below a platen 3 and are supported at their rear ends upon a curved fulcrum-rod 23, mounted in a slotted segment 24, the type-bars being operated by horizontal pull-rods 25 and provided with the (No modelfi usual returning-springs. (Not shown.) At their forward ends the type-bars rest upon a felt, leather. or other cushion or inelastic pad 26, which is interposed between the typebars and a segmental type-basket 27, hung by its ends upon the top plate 28 of the machine, and consisting by preference of two helices 29 and 30, the latter being preferably of larger diameter and inclosing the former and the'two fitting together with sufiicient tightness to give the device the requisite stiffness or stability and in such a manner that while the whole device is fl'exible still it is wholly or nearly inelastic considered as a bar. l/Vhen the flexible bar or rod made in this manner is bent, it

occasions a disturbance of the relative positions of the coils of the interwound helices or, in other words, the coils are caused to move one upon another, and the friction between the coils may be considerable, so as not only to tend to keep the helix bar or rod stiff by opposing the relative movements of the coils, but also to prevent recovery of the rod when bent. For these reasons when the type-bars strike the segmental rod or basket 27 the latter is slightly flexed for more or less of its length; but owing to the binding and friction of its parts it does not recover, and the typebar is not thrown back and lies dead, particularly if an inelastic facing or pad 26 be employed. Thus clashing of the type-bars due to the rebounding in rapid operation is minimized or prevented. The pad 26, as seen at Fig. 2, is of sufficient length to accommodate the segmental system of type-bars 22; but by preference the helix rod or bar is extended at its ends beyond the type system, as at A, to make a yielding support for the body of the helix bar or rod, the ends of the wire forming the outer helix being secured by screws 31 to the under side of the top plate and the portion of the wire at A between each screw and the beginning of the type system forming a yielding support. The wire used may be of soft iron or soft brass or any other suitable substance.

At Fig. 5 the wire of the outer helix is illustrated as triangular in cross-section at 32, so

as to fit better between the coils or whirls of theinner helix and also to render the helix rod or bar smoother on its exterior.

Variations may be resorted to within the scopeof my present improvements, and portions thereof may be used without others.

Having thus described my invention, I clairn 1. A type-rest comprising a plurality of helices nested together.

2. A type-bar rest in the form of a curved rod, which is constructed of distinct parts which bind'upon each other in such a manner that the rod is stiff but sufficiently flexible to yield under the blows of the type-bars, and inelastic.

3. Two helices nested one within the other and forming the type-bar rest of a writing- Inachine, one of said helices being formed of brass wire.

4. The combinationwith a series of typebars of two helices of diflerent diameters one held frictionally within the other and forming a rest for the type-bars.

5. A type-rest comprising a yieldingly-supported plurality of helices nested together.

6. The combination of a brass helixof large diameter and formed of three-cornered wire, and a soft-iron helix wound within said brass helix so as to form a stiff rod which is bent'or curved to form a type-bar rest, and supported upon the framing of a type-writing machine.

7 In afront-strike writing-machine, a typerest comprising a plurality of helices one Within the other and having a facing of softermaterial.

8. In a writing-machine, a plurality of softiron helices nested together tightly so that they may rub upon each other, said helices forming a curved rod, and a pad upon the concave side of said rod.

9. A flexible hanging segmental rod hung yieldingly by its ends and forming an inelastic type-bar rest in a front-strike writing-machine.

lO. Ahanging flexible rod or bar faced with felt and hung yieldingly by its ends upon the framework of the machine and forming an inelastic type-rest for a front-strike writing-machine.

11. In a type-writing machine, a curved bar comprising two helices and forming a typebar rest; one of said helices being wound upon the other between the coils thereof, and the bar being flexible.

12. In a type-writing machine, a curved bar supporting the type-bars and movable under the impacts thereof, and yieldingly supported by its ends; said bar comprising two helices of which one is wound upon the other and between the coils thereof.

13. In a front-strike writing-machine, the combination with a'series of rearwardly-striking type-bars, of acurved inelastic bar yieldingly supported by its ends and forming a rest for the type-bars and preventing the rebound thereof.

14. In a front-strike writing-machine, the combination with a series of rearwardly-striking type-bars, of a curved inelastic metal bar faced with fibrous material and forming a rest for the type-bars, and yielding means for supporting the ends of said bar.

15. In a front-strike writing-machine, the combination with a series of rearwardly-striking type-bars, of a curved bar supporting the type-bars, and yielding devices supporting the curved bar only by its ends; said bar forming an inelastic rest for the type-bars.

BURN HAM (J. STICKNEY.

Witnesses:

E. G. DELANEY, C. SwENsoN.

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