US466464A - Dental bracket - Google Patents

Description

(No Model.) 2 sheetssheet 1. J. H001) 8v S. H. REYNOLDS.

DENTAL BRACKET.

Q7/67mm Patented Jan. 5, 1892.

www wf (No Model.) I I .2 sheets-sheen 2. J. HOOD & S. H. REYNGLDS. YMENTAL BRACKET.

Patented Jan. 5, 1892..

Nrrnn STATES ATENr Erica.

DENTAL BRACKET.

SPECIFICATION forming part of Letters Patent No. 466,464, dated January 5, 1892. Application iiled March 24, 1891. Serial No. 386,238. (No model.)

To all whom it may concern.-

Be it known that we, JOHN HOOD and STEPHEN H. REYNOLDS, citizens of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Dental Brackets, of which the following is a clear, full, and exact description, such as will enable other skilled in the art to which itappertains to make and use the same, ret'- erence being had to the accompanying drawings, which form a part of this specification, and to the letters of reference marked thereon.

This invention relates to improvements in brackets of that class which are especially adapted to be used by dentists for carrying their tools, and has for its object the construction of such a device, whereby the operator by using one hand can easily adj ust the cabinet or tool-tray to any height he may desire.

The invention consist-s in forming the support of two parallel arms, which are pivot-ed at their rear ends to a back plate provided with pintles which are seated in sockets formedin suitable supports attached to the wall, of a front plate connecting the outer ends of the said parallel arms, of an extension-arm sliding in a socket with which the front plate is provided, a catch, and a springoperated lever for manipulating the said catch.

The invention further consists in the novel combination and arrangement of parts, as will be more fully described hereinafter, pointed out in the appended claims, and illustrated in the accompanying drawings.

In the accompanying drawings, in which similar letters of referenceA designate corresponding parts, Figure l is a perspective view, of a bracket embodying the invention. Fig. 2 is a side elevation, being partly in section, showing the. catch in position to hold the arm in its adjusted position. Fig. 3 is a detail side elevation showing the relative positions assumed by the different parts on releasing the catch. Fig. et is a plan view, and Fig. 5 is a detail view showing a transverse vertical section through the handle.

Referring tothe drawings, A designates the back plate, provided with pintles cg a.

B B are two supporters attached to the wall in any suitable manner, and are provided with sockets in which are seated the pintles a a. of the backplate. The said plate is constructed of ornamental metal and is adapted to be turned upon its pintles.

C and O are parallel arms pivoted at their inner ends to the back plate by the bolts c c, and having their outer ends connected by the plate D, being pivoted, respectively, to the upper and lower ends of the same by the bolts d d. The distance between these pivotal points Vis such as will hold the arms'parallel to each other.

The .plate D is provided with a socket d', in which slides the extension-arm E, and which may be made fast therein by the setscrew e. Projecting upward from the outer end of the extension-arm is the standard E', on the upper end of which is journaled the tool tray or cabinet E2. It. is obvious that if the arm as a whole be moved up or down, the plate D will always be parallel to the back plate A, which is so secured as to always be in a vertical position. As the plate D is held in a vertical position, the arm E, which passes through a socket at right angles to the vertical line ot' the said plate, will always support the cabinet E2 in a horizontal position.

The means which we adopt to retain the arm in its adjusted position will now be described, reference being had particularly to Figs. 2 and 3.

Fis a catch formed of a rod of suitable metal. It has a short portion of its lower end bent at right angles and journaled in a bearing formed in the lower of the parallel arms, near the outer end of the same. Its upper part is bent to form a hook f, adapted to engage with the teeth or series of projections formed in the upper edge of the arm O. It will be noticed that the leg f of' the hook is quite long. The object of this is to prevent it from becoming disengaged from the upper arm entirely, which it might do` if it were short. After the bracket has been adjusted to the desired height it can be there held by placing the hook in engagement with the projection nearest to the inner end of the arm which it will reach. To make this adjustment it would require the use of both hands by the operator. To obviate this we provide a means by which he can by using one hand IOO easily raise and lower the bracket and manipu late the catch for securing'it in its adjusted position. To the lower arm C', immediately below the point at which the lower end of the catch F is pivoted, is secured the hollow handle G.

H is a flat spring secured to the inner side of the handle in such a manner as to rest against the said side when in its normal posilon.

7L is a button provided with a shank h', extending into the handle through a suitable opening in the upper part and attached to the spring H.

I is a lever formed of a metal rod bent to any shape adapted to the purpose. In the present instance it is coiled around the lower end of the catch F, which has been bent to form its journal, and is there fulcru med. The upper end e' of the lever is secured to the catch F. The lower end i" projects into the hollow handle. A cap g covers the lower part of the catch and lever, being slotted in its upper part for their passage.

The operation of the device is as follows: Assuming that. the arm is in the position shown in Fig. 2 and that it is desired to lower the bracket, the operator grasps the handle G and presses on the button h and forces it into the handle and causes the upper end of the liat spring H to engage with and operate the lever I. The lever so moved will lift the catch F from its engagement. To facilitate its release the arm is slightly pressed upward. The catch is held elevated until the table has been lowered tothe desired height. Then the pressure on the button h is removed and the catch will fall into engagement with one of 'the projections of the arm C and hold the bracket in its adjusted position.

Having thus described our invention, what we claim, and desire to secure by Letters Patl. In a dental bracket, the combination of the parallel arms, the plates connecting their ends, the upper of the said arms having its upper edge provided wit-h a series of projections, the catch pivoted atits lower end to the lower arm, the leverpivoted to the lower arm near its lower end and connected at its upper end with the catch, and the spring engaging with the free end of the lever, substantially as described.

2. In a dental bracket, the combination of the plate A, provided with pintles seated in sockets formed in supports attached to a wall, the parallel arms C and C', pivoted at their inner ends to the said plate, the plate D connecting the outer ends of the said arms, the upper of the said arms having its upper edge provided with projections, the catch F, pivoted at its lower end in the lower arm O,and its upper end formed into a hook to engage with the projections of the arm C, the lever fulcrumed on the lower end of the catch and having its upper end attached to the same and its lower end extended into a hollow handle attached to the lower arm, the spring H,and the button 7L, substantiallyas described.

In testimony whereof we afiix our signatures in presence of two witnesses.

JOHN HOOD. j STEPHEN H. REYNOLDS. Vitnesses:

EUGENE II. MOORE, ROBERT LEVI.

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