US807945A - Clamp. - Google Patents

Description

I PATBNTED DEC. 19, 1905. GI HI CLAMP.

APPLICATION FILED APRA, 1905,

- I Y! W, attan-13f NrrED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed April 4., 1905. Serial No. 258,827.

To all whom it may concern.-

Be it known that I, CARL H. LANG, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Clamps, of which the following is a specification.

This invention consists of a novel form of clamp which has been devised particularly for use in construction and repair of piano-keys in gluing the ivory fronts, top, and tail pieces to the body of the key, which is ordinarily of wood. The clamp is designed to facilitate the repair of keys, action parts, split hammers, or the like and may be used in various ways in the manufacture of piano parts especially.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for efi'ecting the result reference is to be had to the following description and accompanying drawings, in which- Figure 1 is a perspective view showing the invention as when applied in actual use in connection with a key of a piano. Fig. 2 is a perspective view showing a different application of the invention and adjustment of the parts thereof. Fig. 3 is a side elevation of the clamp, illustrating a further application thereof. Fig. 4 is a detail perspective view of the clamp-plate utilized and forming a part of the clamp device. Fig. 5 is a perspective view of the relatively movable section of the clamp.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The clamp comprises a frame composed of sections which for the purpose of this invention will be called the relatively fixed section 1 and the relatively movable section 2. The sections of the frame of the clamp are of approximately U form, each having spaced sides and a connecting-bar therefor. The sides of the movable section 2 have pivotal connection at the ends with extremities of the sides of'the section 1, the pivotal connection being indicated at 3. It will therefore be seen that the section 2 by pivotal movement may be adjusted so as to be arranged in line with the section 1 or at an angle thereto, according to the desires of the operator and dependent upon the special use to which the clamp will be put. The section 1 is provided with the customary clamp-screw 4, which is adapted to engage a side of the clamp-plate 5, the latter being of somewhat rectangular form. The side of the plate engaged by the screw 4 is formed with diagonal ribs 6, which extend from corner to corner, preferably, said ribs being connected near one of the ends of the plate 5 by a transverse arcshaped rib 7, the latter in conjunction with the adjacent portions of the ribs 6 forming a seat 8 to receive the end of the screw, so that the latter may effectively prevent displacement of the plate when the parts of the clamp are arranged in certain positions.

Projecting from the transverse bar of the section 2 of the clamp and disposed between the sides thereof is a projection or extension 9, the latter being adapted to be received in the guide-pin hole or opening customarily formed in the bottom of the piano-key, and said member 9 will effectively prevent the clamp from slipping out of place when pressure is being applied in an oblique direction or at an angle to the section 2 aforesaid. An end of the clamp-plate 6 has a transverse tongue or rib 10 extending therefrom in a direction upon the side opposite that having the ribs 6' and 7, and this element 10 also assists in preventing slipping of the clamp-plate when the clamp is holding parts together in a mannersimilar to that shown in Fig. 1 of the drawings.

Fig. 1 shows the clamp as when utilized in the operation of gluing ivory parts to a pianokey, and the practical advantages of the clamp will be noted with regard to the adjustment of the parts in the application illustrated in this figure.

In Figs. 1 and 2 the extension or projection 9 is disposed in the guidepin opening of the key-body, and the sections 1 and 2 of the frame of the clamp are arranged at an angle to each other.

In Fig. 2 the section 1 is approximately at a right angle to the section 2, and theclampscrew 4 is engaged in the seat 8 upon the outer side of the clamp-plate 5.

Fig. 3 shows the frame-sections l and 2 approximately in line with each other, in which instance the clamp may be used as an ordinary clamp device for holding parts together, as will be very obvious. verse bar of the section 2 may be widened, so as to afford an extended bearing for the same in the clamping operation.

A special advantageous feature of the invention resides in the fact that in gluing on the If desired, the trans top or head piece of a piano-key said clamp will draw the ivory joints with the tailpiece tightly together, so that no black lines will be apparent when the ivory parts of the key have been secured and the key finished.

Having thus described the invention, what is claimed as new is- 1. In a clamp, the combination of a frame composed of approximately U-shaped sections, having the sides thereof pivotally connected, and a clamp member carried by one of said sections.

2. In a clamp, the combination of a frame composed of a section comprising spaced sides, a second section comprising spaced sides having pivotal connection with the sides of the first-mentioned section, and a clamp-screw carried by the last-mentioned section, the sides of the first-mentioned section being less distance apart than those of the second-mentioned section, whereby those of the first-mentioned section may be turned so as to occupy space between the sides of the second-mentioned section.

3. In a clamp, the combination of a frame composed of angularly-adjustable sections of approximately U form, the sides of said sections being connected, and a clamp-screw carried by one of the sections.

4. In a clamp, the combination of a frame, a clamp-screw carried by the frame, a clampplate provided upon a side thereof with angularly-arranged ribs, and a transverse rib connecting spaced portions of the angularlyarranged ribs aforesaid.

5. In a clamp, the combination of a frame, a clamp-screw carried by the frame, a clampplate, diagonally-arranged ribs upon one side of the clamp-plate, a transverse arc-shaped rib connecting spaced portions of the diagonallyextending ribs and forming a seat for the clamp-screw, and a transverse rib or tongue upon the side of the plate opposite that having the ribs aforesaid.

6. In a clamp, the combination of a frame composed of sections of approximately U form, the sides of the sections having pivotal connection, a clamp-screw carried by one of the sections, and an extension or projection projected from the transverse bar of the other section between the sides thereof.

In testimony whereof I aflix my signature in presence of two witnesses.

CARL H. LANG. [L. s.l

Witnesses:

GEORGINA BAXTER, MARK A. FooTE.

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