US551543A

US551543A - baker

Info

Publication number: US551543A
Authority: US
Publication date: 1895-12-17
Anticipated expiration: 1912-12-17

Description

(No Model.)

B. s. GRAHAM & W. B. .S-AVELL. Y CUSHION FOR KEYS FOR TYPE WRITING MACHINES.

No. 551,543. Pavtsnted'Deo. 17, 1895.

Wwasva- UNITED STATES PATENT OFFICE.

ROBERT SYLVESTER GRAHAM AND \VILLIAM BENJAMIN SAVELL, OF NE\V ARK, NEWV JERSEY, ASSIGNORS TO THE TYPE-IVRITER CUSHION-KEY COMPANY, OF SAME PLACE.

CUSHION FOR KEYS FOR TYPE-WRITING MACHINES.

SPECIFICATION forming part of Letters Patent No. 551 ,543, dated December 17, 1895.

Application filed April 21, 1894. Serial No. 508,494. (No model.)

To all whmn it ntcty concern.-

Be it known that we, ROBERT SYLvEs'I'ER GRAHAM and WILLIAM BENJAMIN SAvELL, citizens of the United States, and residents of 5 Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Cushions for Keys Y of Type WVriting and other Machines, of

which the following is a specification.

The object of our present invention-is to construct a cushion more particularly for the key which is generally known as the spacebar, and in the accompanying drawings we have shown the application of the cushion to the long space-bar of the ordinary Remington and other type-writing machines employing a long space-bar, and also to the short space-bar of the ordinary caligraph and other type-writing machines containing the short space-bar.

In the accompanying drawings, Figure 1 represents a plan view; Fig. 2, a longitudinal section; Fig. 3, a cross-section on the line 3 3 of Fig. 2; Fig. 4, a cross-section on the line 4 4 of Fig. 2; Fig. 5, a cross-section corresponding with the line 3 3 of a modification; Fig. 6, a plan view'of a short space-bar; Fig. 7, a longitudinal section of the same.

In all the figures, Ct is the space-bar and b the bar or bars by which the space-bar is connected with the operative parts of the machine.

The cushion shown in Figs. 2, 3, 4, and 7 consists of soft rubber molded so as to present the continuous upper surface 0 to receive the touch of the finger of the operator, the downwardly-projecting end flanges d d and the downWardly-projecting side flanges e e leaving between said flanges the air-space f. The said flanges constitute rests for supporting theupper surface 0 on top of the spacebar in such position that the air-space f remains between it and the space-bar and thereby affords softness to the touch by permitting the surface 0 to yield quite freely. The flanges e e at the top are quite narrow, so as to give the maximum extent in width of airspace beneath the member a; but for securing firmness of support, the flanges e e are reinforced by being made thicker at their lower edges, as shown in Fig. 3.

In the case of the cushion for the long spacebar, it is desirable that the member 0 shallbe supported at the middle as well as at the ends, and this we accomplish by providing the cross-flange g at the middle.

Having thus constructed the cushion, we provide the following means for readily securing it on top of the space-bar: We provide a wire for each end, of duplicate construction, consisting of a loop 72. embedded in the flange at the end of the rubber cushion during the process of manufacture thereof. The projecting ends h and 7L2 from this loop are bent downwardly and inwardly over the end of the space-bar. This secures the cushion against endwise movement. The ends 72. and k are then bent at right angles in opposite directions and turned up, one on each side of the space-bar, as at h if. This secures the cushion against sidewise removal. In the case of the short space-bar, it may be desired to secure the cushion also at its middle, which we may do by the wire '5 embedded crosswise in the flange g during the process of manufacture. Each of the projecting ends "t" and t of' the wire '6 is bent downward and under the space-bar, as shown in Fig. 4.

In lieu of having the air-spacef constructed in the cushion, we may secure the required softness for the upper surface 0 byconstructing the whole body of the cushion of cellular or sponge rubber, as shown in Fig. 5.

We have described the means which we prefer for securing the cushion to the space. 8 5 bar, but we do not wish to be limited to the details of this means.

We claim- 1. In combination, the space-bar and a soft rubber cushion overlying the same and provided with side and end flanges, substantially as described.

2. In combination, the space-bar, a soft rubber cushion overlying the same and means whereby said cushion is secured at its oppo- Signed at Newark, in the county of Essex 10 site ends to the space-bar, substantially as and State of New Jersey, this 17th day of described. April, A. D. 1894:.

3. In combination, a space-bar and a soft 5 rubber cushion consisting of the upper mem- ROBERT SYLVESTER GRAHAM.

ber c and side and end flanges whereby said WILLIAM BENJAMIN SAVELL. upper member is supported 011 the space-bar Witnesses: leaving an air space between, substantially FREDERICK A. O. BAKER,

as described. FRANK L. BoPPE.