US558582A - Albert b - Google Patents

Description

(No Model.)

A.. B. DICK.. TYPE WRITING MACHINE.

No. 558,582. Patented Apr. 21, `1896.

it: l: j; n C feg AN DREW BLRANAM, PHDTOUTHOAWASHINFQDN. D C

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rares ALBERT li. DICK, OF CHICAGO, ILLINOIS, ASSIGNOR TO TIIE A. I. DICK COMPANY, OF SAME PLACE.

TYPE-WRITING IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 558,582, dated April 21, 1896. Application iiled November 4,1891. Serial No. 410,858. (N o model.)

To LZZ whom, it may concern,.-

Be it known that I, ALBERT B. DICK, a citizen of the United States, residing atChicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Apparatus for OperatingCharacter-Bearing Arms or Bars, of which the following is a speciiication.

M y invention relates to a new and improved apparatus for operating character-bearing arms or bars, of which the following` is a specification.

I will irst describe a form of mechanism embodying my invention, and will then point out in the claims what I deem to be the novel features.

Figure l of the accompanying drawings, forming part of this speeication, represents, diagrammatically, a mechanism embodying my invention. Fig. 2 represents one form of key-lever, and Fig. 3 a modiiied form.

In the drawings, A represents the platen of the machine,B the type-bars, and C the key-levers. The type-bars B are preferably massed into 'the form of a truncated pyramid, (of which but one side is shown in the drawings,) the apex of the pyramid being toward the striking-point on the platen. The type-bars so massed are arranged vertically below the platen of the machine, the type-bars being, as shown, at their type-heads ZJ quite close together, but not touching, and diverging toward their bases, so that at their lower ends the type-bars are separated by a space such as to permit of the introduction of the operating mechanism.

D is a plate perforated with the required number of holes, one for each type-bar, the holes being smaller than the type-heads B, so as to retain the same resting upon the plaie when not in operation.

E is another plate similar to the plate D, but placed nearer the base of the pyramid and at such a distance from the bottom of the type-bars as to be out of the path of movement of the key-levers.

F F are side bars or plates connecting the plates D and E and sustaining them in position.

I have shown two forms of key-lever in the drawings, that form shown in Fig. 2 having its fulcrum c farther from the linger-piece G than has the form shown in Fig. 3, thereby permitting the outer or hammer end I-I a shorter range of movement. The form of keylever shown in Fig. 3 has a hammer-head I with its fulcrum c near the linger-piece Gr, so as to permit a greater range of movement than has the head shown in Fig. 2. This hammer-head I is, as shown, in the form of a plate, which is designed to strike the typebar at about the point x and follow the typebar up during its movement toward the platen, the type-bar during said movement passing across the face of the head I from the point as to the point x2. The hammer-heads of the type-bars may be faced or made of rubber or other similar material, so as to lessen the noise of the blow.

From the foregoing description of the apparatus it will be seen that the method of operation is substantially as follows: On depressing the finger-piece of a key-lever of the form shown in Fig. 2 its hammer end H will strike the end of the type-bar forcibly and by its impact drive said type-bar toward the platen. The type-bar after printing will return to its position by gravity without the aid of any mechanical connection. On depressing the linger-piece of the key-lever shown in Fig. 3 the hammer-head I of that form of keylever strikes the type-bar as before and its impact tends to drive it forward; but by reason of the shape of the hammer-head and the position of the fulcrum the said hammer-head may be caused to continue in contact with the end of the type-bar until the same has struck the platen. Such continued contact may be desirable under certain circumstances.

I claiml. In a type-writing machine, the combination with a platen, of reciprocating typebars loosely supported beneath and out of contact with said platen, each bar carryinga complete character, a key-lever for each typebar, and an enlarged bearing-surface on each lever normally out of engagement with said type-bars, but adapted to engage the same when the type-bars are operated,substantially as set forth.

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2. In a type-Writing machine, the coinbi- When the levers are operated, substantially Io nation with the platen, reciprocating typeas set forth. bars loosely supported beneath and out of This specification signed and witnessed this contact With said platen, each bar carrying a 29th day of October, 1891. complete printing-character7 a key-lever for each type-har, and an enlarged bearing-sinr- ALBERT B. DICK. face on cach lever extending out on one side Witnesses:

thereof normally out of engagement With said VILLIAM G. ARNOLD,

type-bars, and adapted to engage the saine R. R. HARRINGTON.

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