US649234A - Dental tool-holder. - Google Patents

Description

um- 49,234. Patented May a, 1900.

' A CHIAVARO. DENTAL TOOL HOLDER.

(Application filed Aug. 26, 1897.)

( No Model.)

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Inventor.

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Altulllutv ilmrsn dramas Parana rarest AYGELO OHIAVARO, OF eA'rANiA, sioiLY.

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steers-resales forming part of Letters patent is. 649,234, dated ma s, leo'o.

To (ZZZ whom it may concern:

Be it known that I, ANGELO OHIAvARo, a subject of the King of Italy, and a resident of Catania, Sicily, (residing temporarily in the city and county of Philadelphia, in the State of Pennsylvania,) have invented certain new and useful Improvements in Devices for Holding Dental and other Tools, of which the following is a full, 'clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to a device of simple, and efficient construction for holding dental and other tools whereby the tool may be adjusted to different Working angles or posi: tions in respect to the handle to meet various requirements of service, thereby-attaining by a single implement the several functions heretofore performed necessarily by a large number of separate and independent instruments.

To this end the invention, as generally stated, comprises a handle provided with a socketed end portion having in and around its wall a series of recesses of Varying depths, a tool-bearing ball provided with a neck and fitted in said socket so as to have a universal movement therein, whereby said ball may be adjusted to dispose the neck in any one of said recesses,and means for clamping said ball in diiferent positions of adjustment.

The invention also comprises various novel features of construction, which will be herein-- after pointed out.

In the annexed drawings, Figure l is a side elevation of a device embodying, my invention. Fig. 2 is a longitudinal vertical section thereof. Fig. 3 is a similar section, enlarged, of the forward or working end of the device. Fig. 4 is an end and side view, respectively, of the socket-piece. Fig. 5 is a side eleva tion of the tool holding ball.

A represents a handle of any appropriate form and size for its intended purpose. This handle is formed with a central perforation a. which extends from end to end thereof and which is screw-threaded at or near one of its ends, as at ct. The adjacent end of the handle is exteriorly threaded, as at :1), and slightly ooncaved, as at a". Screwed onto the part a? is a socket-pieccii, the outer end of which is Application filed August26,1897. serials 649,551. mammal.)

be turned to and seated in an yof the recesses,

as desired, and thereby supported on its un der and lateral portions at diiferent working angles in respect to the handle. This neck has an internally-threaded extension 0, into which may be screwed the correspondingly threaded shank of an appropriate tool, as D. Extending through the central perforation of the handle is a rod E,- one end of which is screw-threaded, as at e, to. engage the threaded portion of the perforation, while the op'- posite extremity is provided with a' knob or cap e, which closes the end of the handle. Thus if the ball be turned to seat the neck thereof in one of the recesses of the socketpiece and the rod be then screwed up the inner end of the latter will bear forcibly against the ball and clamp it in place, thereby maintaining the tool fixedly in the angle or position determined by the depth of the recess. The opposing Wall of the recess acts as a back and lateral support for the neck of the ball to counteract the thrust of the tool While it is in position.

I preferably recess the edge of the socketpiece at points intermediate the recesses b, as at b, so that the neck may be supported therein, if desired. I also preferably provide the ball with suitably-located sockets c and point the inner end of the rod E, so that the point may register with one of the sockets c when the ball is adjusted, and thereby aid still more effectually in clampingthe tool in position.

I may add that I do not limit myself to the particular construction above described, as obviously the device may be variously modified without departing from the fair spirit of the invention.

l. The combination,with a handle or holder provided with a socket having in and around its wall a series of recesses of varying depths, of a tool-bearing ball provided with a neck and fitted in said socket,-so asto have a universal movement therein, whereby said ball may be adjusted to dispose the neck in any one of said recesses, and means for clamping said ball in positions of adjustment, substan tially as described.

2. The combination, with a longitudinallypcrforated handle or holder, of a screw-threaded socket-piece on one end thereof having in its outer end a series of recesses of varying depths, a tool-bearing ball fitted between said socket-piece and the end of the handle so as to have a, universal movement therein and provided with a neck adapted by the adj ustment of the ball to register with the recess or recesses in the end of the socket piece, and

a screw-rod fitted in said handle and adapted to clamp the bell, substantially as described.

The combinatiomwith a longitudinallyperforated handle or holder, of a socket-piece on one end thereof, a tool-bearing ball fitted in said socket-piece so as to have a universal movement therein and provided with a series of indentations or sockets, and a screw-rod fitted in said handle or holder and pointed at its inner end for engagement with said indentations or sockets in the ball, substantially as described. 1

In testimony whereof l have hereunto affixed my signature in the presence of two subscribing witnesses.

ANGELO GI-IIAVARO.

Witnesses:

JOHN W. lilonnnnr, Jonn R. NOLAN.

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