US228645A - Adjustable bracket - Google Patents

Description

(NoModeL) C. E. KELLS, Jr. Adjustable Bracket.

No 228,645. Patented June 8,1880.

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UNITED STATES FFicE.

PATENT ADJUSTABLE BRACKET.

SPECIFICATION forming part of Letters Patent No. 228,645, dated June 8, 1880.

Application filed March 24,1880. (No model.)

To all whom "it may concern Be it known that 1, CHARLES EDMUND KELLS, Jr., of New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and Improved Adjustable Bracket, of which the following is a specification.

The object of this invention is to provide a bracket especially designed for dentists use, which may be readily adjusted in a horizontal or vertical position.

The invention consists of a tube containing a spring-actuated longitudinally-inoving ratchet, said tube being secured upon a plate which is pivoted. to the end of two parallel arms, whose other ends are pivoted to a plate that is designed to be fixed to the wall of a room.

Figure 1 is a side elevation of the device. Fig. 2 is an enlarged longitudinal sectional elevation of the tube and ratchet. Fig. 3 is a transverse sectional elevation of the same on line a m, Fig. 2. Fig. 4 is a longitudinal seetional elevation of the spring-bolt.- Fig. 5 is a side elevation of the same.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents a plate of nearly triangular outline, upon which plate A is secured a tube, B, which contains the ratchet C, said ratchet O being slotted, as shown at a a, and secured within said tube B by means of pins 1), that pass through the tube B and the said slots a a. The teeth of said ratchet project downward through the slot 0 in the under side of the said tube B, and on the edge of said ratchet, and projecting through the slot 0 of the tube B, is a handle, (I, by means of which handle (I said ratchet O is moved. The said ratchet O is further actuated by the spring f, that extends between its end and the end of the tube B, as shown in Fig.2.

D D are the parallel arms, an end of each of which is pivoted in the opposite corners of plate A, while the opposite ends of said arms D are pivoted to a plate, E, that is desi ned to be fastened somewhere in the room in which the bracket is used.

F is a spring-bolt case fastened upon the plate A immediately below the tube B, so that the projecting handle 9 of the bolt Gr shall engage, when desired, with the teeth of the ratchet O, and so that the end of the bolt G shall engage, when desired, in the teeth of the segmental rack H, which extends across the parallel bars D D, and is pinned thereto.

I is the table, supported on the end of the tube B.

The slots a a in the ratchet O are so shaped that by pulling upon the handle d the said ratchet O is drawn downward slightly out of the slot 0, so that its teeth shall engage in the handle g of the spring-bolt G. and thereby disengage the said bolt G from the teeth of the rack H, in order that the plate A and all the parts secured upon it may be adj usted vertically.

On releasing the handle d the spring f operates to retract the ratchet O and draw it upward at the same time within the tube B, thereby disengaging the teeth of said ratchet from the handle 1 of the spring-bolt G, and permitting said bolt to re-engage in the teeth of the rack H, as shown in Fig. 1, and hold the device in the desired position.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. An adjustable bracket, constructed substantially as herein shown and described, consistin g of the plate A, slotted tube B, attached thereto, slotted ratchet O, pinned within said tube, pivoted parallel arms D D, rack H, secured across said arms, spring-bolt G, pro vided with a handle, g, and table 1, operating in combination, as set forth.

2. In an adjustable bracket, the combination, with the table I and plate A, of the slotted tube B, slotted ratchet 0, provided with handle (I, and spring-bolt Gr, provided with handle g, substantially as herein shown and described.

O. EDMUND KELLS, JR.

Witnesses:

CHARLES E. KELLS, W. H. STUART.

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