US874281A - Dental plugger. - Google Patents

Description

PATENTED DEC. 17, 1907.

R. H. ANTES. DENTAL PLUGGER. APPLICATION FILED r1113. 10, 1904.

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ROBERT H. ANTES, OF GENESEO, ILLINOIS.

DENTAL PLUGGER.

Specification of Letters Patent.

Patented Dec. 17, 1907.

Application filed February 10, 1904. Serial No. 193,022.

T 0 all whom it may concern:

Be it known that I, ROBERT H. ANTEs, of Geneseo, county of Henry, and State of Illinois, have invented certain new and useful Improvements in a Dental Plugger, of which the following is a full, clear, and exact description, that will enable others to make and use the same, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in the class of automatic dental instruments for which Letters Patent were granted to me on the 14th day of June, 1881, and September 22nd, 1885, and numbered 242,853, and 326,537 respectively.

One of the objects of this invention is to provide an arrangement whereby the force of the blow delivered is increased without proportionately increasing the weight or throw of the mallet.

Another object is to provide for the adjustment or setting of the tool point so that the same may be brought into a proper position with reference to the work and the position of the mallet.

The construction and operation of the device is of the same general character as that set forth in the patents herein referred to. A full detail description of the old parts will therefore be omitted and the description limited to the new features and the old partsnecessarily connecting therewith.

In the drawing, Figure 1 is a part elevation and longitudinal section of a device embodying the improved features; and Fig. 2 is a view showing detached details.

A represents a tubular tool stock, and B a tool-holding shaft inserted loosely and longitudinally therethrough as shown. The upper part of a sleeve 3.is loosely mounted on the lower end of the stock and is movably held in place by means of a set-screw 4 inserted therethrough and engaging an annular groove 5 formed in said stock. The tool holding shaft B has a slight endwise or vertical movement in its working position and is provided on the lower end with a head 6 inclosed in the lower part of sleeve 3. The lower end of sleeve 3 is apertured for the insertion of the tool 7 which is removably held in the head 6.

The sleeve 3 is provided (Fig. 2) with a slot 8 through which a screw 9 threads into an aperture 10 in head 6. This feature insures that the tool shaft will be held against rotation with reference to the sleeve or casing 3, while still being free to reciprocate therein. end of the stock and the upper end of the head provides for the free reciprocating movement of the tool carrying shaft.

As illustrated in Fig. 1.,the working parts are shown in their normal position, the upper end of the tool-shaft resting below the corresponding end of stock A. When a pressure is applied to the work end of the tool, by bringing the same in contact with a tooth or other object the shaft is forced upward, the upper end projecting far enough to receive the full force of the blow delivered by the mallet O, as indicated in dotted lines. When the pressure on the point of the tool is relaxed the shaft gravitates to its normal position to be again raised to receive the neXt blow and so on continuously in impacting the filling. By having the tool carrying shaft independent from the stock a less percentage of the force is absorbed by the latter and the working efiiciency of the device proportionately increased.

The sleeve D, forming a handgrasp for the operator, is loosely mounted on the stock A and has a reciprocating movement thereon in manipulating the device. The operative connections between the sleeve and mallet are substantially the same as set forth in the prior patent referred to, and comprises a rod 12, a lever 13, a link 14, pivotally connecting with the handle 15 of the mallet, the fulcrum arm 16 supporting the mallet and the spring 17 for returning the same to its normal position after each blow.

The sleeve 3 mounted on the lower end of the stock A may be turned around thereon, turning the shaft B at the same time, in bringing the curved point of a tool into proper position as may be required by the work. This sleeve may be locked at any point, to which it is capable of being adjusted, by a set-screw 4.

It will be seen that my invention provides for the convenient rotation of the tool shaft, for the purpose of positioning a bent tool in the most advantageous manner, and provides also for securing the tool and shaft against rotation when adjusted to any desired degree. The importance of this accomplishment will be recognized when it is recollected that the stock A may not be conveniently rotated to position the tool as desired, since such rotation of the stock would The space 11, between the lower require the rotation of the whole device, the stock and manipulating sleeve D being connected by the hammer and actuating connections in such manner as to prevent relative rotation thereof. I therefore provide the sleeve or casing 3, which is rotatable on the stock and capable of being set thereon, and which, by reason of slot 8 and screw 9, is adapted to effect rotation of the tool shaft, and to cause the same to reciprocate without rotation, when the desired adjustment has been reached and the screw 4 set.

Having thus described my invention, what I claim is- 1. In a dental plugger, the combination of a reciprocable tool shaft provided at its forward end with means for holding a tool, a tubular stock in which said tool is mounted loosely both as to reciprocation and rotation, a casing constructed to be rotatively seated on said stock, means for connecting said casing and tool shaft to permit the latter to reciprocate therein and rotate therewith, and means for setting the casing at the desired adjustment.

2. In a dental plugger, the combination of a reciprocable tool shaft provided at its forward end with means for holding a tool, a tubular stock in which said tool is mounted constructed to be rotatively seated on said stock, means for connecting said casing and tool shaft to permit the latter to reciprocate therein and rotate therewith, and a set screw threaded through the casing with its inner end standing in said groove.

3. In a dental plugger, the combination of a reciprocable tool shaft provided at its forward end with means for holding a tool, a tubular stock in which said tool is mounted loosely both as to reciprocation and rotation, a casing provided with a longitudinal slot mounted on the forward part of the stock for rotatable adjustment thereon, means for setting the casing at the desired adjustment, and a screw standing loosely in said slot and threaded into the forward end of the tool shaft.

' ROBERT H. ANTES. Witnesses:

FRANK MoARTHUR, PHINEAS Monnow.

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