US453241A - heaen - Google Patents

Description

(No Model.) 3 Sheets-Sheet ,1.

M. HEARN.

TYPE WRITING MACHINE. No. 453,241.: Patented June 2, 1891.

(No Model.) 3 Sheets-Sheet 2. M. HBARN.

TYPE WRITING MAOHINE. No. 453,241. Paten tedJune 2,- 1891 UNESSES: l/VVE/VTOH:

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M. HEARN.- TYPE WRITING MACHINE.

No. 453,241. Patented June 2,1891.

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ATTORNEYS UNITED STATES PATENT UFFICE.

MICHAEL HEARN, OF HAMPSTEAD, ENGLAND.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 453,241, dated June 2, 1891.

Application filed June 12, 1888. Serial No. 276,884. (No model.) Patented in England December 8, 1886, No. 16,068.

1 To aZZ whom it may concern:

Be it known that 1, MICHAEL HEARN, a subject of Victoria, Queen. of Great Britain and Ireland, residing at17 Nassington Road, Hampstead, in the county of Middlesex, England, have invented a new and useful Type- Writing Machine, (for which I have obtained a patent in Great Britain, No. 16,068, bearing date December 8, 1886,) of which the following is a specification.

My invention relates to improvements in type-writing machines in which weighted or balanced type-levers are operated by fingerkeys; and the objects of my invention are to provide an improved finger-key machine simple in construction and moderate as to price. I attain these objects by mechanism illustrated in the accompanying drawings, in which Figure 1 is a part sectional View of the entire machine on the line-1 2, Fig. 2; Fig. 2, a top view of so much of the machine as is necessary to illustrate the mechanism, the other half being in all respects exactly the same.-

Fig. 3 is a perspective view of a portion of the mechanism. Fig. 4 is a cross-section on line-4 4 of Fig. 1. Fig. 5 is a top view of the case which fits over the machine.

Similar letters and figures refer to similar parts throughout the several views.

The .table or frame A, Figs. 1 and 2, may be a skeleton frame of metal or one entire piece of wood,having a metal bed, where the bracket B is fixed and the rollers of the paper-carriage run. To this table a semicircular bracket B is secured, and on this bracket the semicircular plates 0 D, hereinafter called guideplates, are secured by means of screws. The guide-plates are fitted one over the other, as shown in the perspective view, Fig.4, the said guide-plates having radial slots a a a, Fig. 2, and the lower plate D having a groove 17 b b, which intersects the said radial slots to a. In these radial slots the type-levers E, Fig. l, are fitted and rotate on a wire bearing fitting into the said intersecting groove 6. The lower ends of the type-levers E are enlarged, and thereby weighted, so that their upper ends, which carry the type, are held normally vertical, as shown in Fig. 1. Such enlarged and weighted portions are rounded corresponding to recesses in the inner ends of the finger-keys F. It is obvious that on tapping finger-keys F the type-levers E are rapidly impelled to the printing-point. At the same time the keys F rapidly depress lever L, which operates the spacing-lever H.

In order to take up wear in the radial slots, a bevel-headed screw Z, Figs. 1 and 4, is fitted into the backs of the type levers E, and is screwed farther down when necessary.

The finger keys F, Fig. l, are similarly fitted into a plate G, Figs. 1 and 2, having radial slots 0 c and a groove cl d, the wire bearing on which the finger-keys are pivoted being kept in position by flange-headed screws e, Figs. 1 and 2.

The spacing movement is effected by a lever I-I, Fig. 1, pivoted at f, and operating two racks g 7t by means of a beveled tooth 1', Figs. 2 and A spiral springI draws the carriage from right to left, and a spring J, attachedto an arm K, retracts the lever H, which is directly operated on by the circular lever L, Fig. 1. Ribbon-spools M are fitted to supports N, hinged at 7, Figs. 1 and 2, to a piece 8, fixed in the lower guide-plate D. A bent rod 0, Fig. 2, connects supports N, and is used to run back the spools, in order to examine the type-writing as it progresses. Said spools are operated by jointed levers 0, having a cross-piece q, that engages ratchet-wheels P, and attached at one end 10, Fig. 5, and to the lever L. Athumb-nutWV regulates the movement of the spools. These levers are thrown into and out of gear with their respective ratchet-wheels by a rod 1' and pin S, Figs. 1 and 2. The roller Q is mounted and slides in supports R, but is kept in position by a rod S.

X is a circular support, 011 which the characters are engraved.

Z is the spacing-plate. Over all the typelevers and finger-keys a metal cover 3 is fitted, as shown in Fig. 1, and the half plan, Fig. 5. Inside the cover a cushion 4 is fitted, against which the type-levers rest, as shown in Fig. 1.

.The upper part 5 of the said cover may be made removable, in order to more easily adjust the type-pieces 6 in the type-levers.

It will be seen from the foregoing that the machine is semicircular in form, and that the spacing-lever H is centrally pivoted.

Having now particularly described my infitted to them, substantially as shown and devent10n,WhatI desire to secure by Letters Patscribed.

ent isi 11 12, type-writing machine, the combina- MICHAEL EARN 5 tion, with finger-keys and the slotted guide- Witnesses:

plate 0, of the type-levers E, having a coun- CHAS. BROOK,

terpoise at one end, and abevel-headed screw I MILFORD NORSWORTHY.

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