US408883A

US408883A - Lerie

Info

Publication number: US408883A
Authority: US
Publication date: 1889-08-13
Anticipated expiration: 1906-08-13

Description

(No Model.)

S. LAGAVALERIE & O. DORIOT.

DENTAL'PLUGGBR.

Patented Aug. 13, 1889.

6? Jam. 6. 49M

WIT NEEEEEI INVENTEH IS:

N: PETERS. Phoqo um m her. Washington. \10.

' UNITED STATES PATENT OFFICE.

SEBASTIEN LACAVALERIE AND CONSTANT DORIOT, OF PHILADELPHIA PENNSYLVANIA, ASSIGNORS TO THE S. S. IVHITE DENTAL MANUFAC- TURING COMPANY, OF SAME PLACE.

DENTAL PLUGGER.

SPECIFICATION forming part of Letters Patent No. 408,883, dated August 13, 1889. Application filed February 1, 1387- Serial No. 226.159. (No model.)

To all whom it may concern.-

Be it known that we, SEBASTIEN LAoAvA- LERIE and CONSTANT DORIOT, citizens of the Republic of France, residin at Philadelphia,

in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Dental Pluggers, of which the following is a specification.

Our invention relates to improvements ap- IO plicable to dental pluggcrs adapted to be operated by means of a rotary driving-shaft, to which motion may be imparted from any suitable motor.

Our object mainlyisto provide novel means 1 5 for operating the plugger, whereby it may be actuated by rotation of the driving-shaft in either direction; and to this end our invention consists in the employment, in connection with a rotary spindle and appropriate appur- 2o tenances thereof, of a pair of concentricallyarranged cams having reVersely-cut or oppositely-inclined faces and adapted to operate alternately, according to the direction of rotation of the spindle, to effect the delivery of blows upon the plugging-tool.

Our invention further consists in certain novel means for preventing blows being imparted to the plugging-tool.

In the accompanying drawings, which show 0 a suitable embodiment of our improvements in a dental plugger, Figure 1 isaview,partly in elevation and partly in longitudinal central section, of the complete plugger; Fig. 2, a view in elevation of a portion thereof; and

3 5 Fig. 3, a bottom end view or inverted plan, on

' an enlarged scale, of the spindle and concentrically-arranged cams.

The hand-piece or cylindrical casing A of the instrument has removably connected to 40 its outer end the tapering sleeve B, provided with the detachable supplementary bearingsleeve or nose-piece B for a suitable springretracted clutch or holder of the pluggingtool a. The inner or butt end of the casing A 5 is internally threaded to receive the externally-threaded sleeve d, in which, as well as in a plug d, the hammer shank or spindle c has bearing. The plug d is adj ustable lengthwise of the spindle e, for a purpose to be farther on explained. The projecting portion 6 of the spindle may be of any desired form or dimensions to adaptit to be connected with and rotated by any of the ordinary dental engines.

Upon the spindle is loosely and concentrically fitted a tube or sleeve 9, having its outer end formed or cut away spirally to produce a cam face or incline g, terminating in a shoulder g to abut against a pin or stud g fixed to and projecting laterally from the spindle. A tube H, of larger diameter than the tube 9 and loosely encircling it, has one or more spiral inclines or cam-faces 71/ formed or cut 011 its outer end concentrically with theinner cam face or incline g. In this instance, and for a purpose hereinafter explained, there are two outer cam-inclines terminating, like the inner cam-incline, in shoulders, 7b to abut against a fixed pin or stud h on the inner ca1n-tube g. The concentric camfaces g and h are cut reverselythat is, formed to incline in opposite directions.

Between the inner end of the outer camtube II and the plug d is arranged a spiral spring H, acting to press the tubes outward or in a direction away from said plug. This spring acts upon a hammer to produce the blows upon the plugging-tool in manner presently to be made apparent.

The cam-tube H is threaded and screwed 8c into a hammer-tube I. The hammer-head is normally in contact with the inner end of the plugging-tool holder. The casing A is slotted at k to form a guideway, in which plays a pin or set-screw 7e, secured to the hammer. The reciprocation of the hammer is in this way allowed, while its rotation in the casing is prevented.

From the above description it will be seen that when the spindle is rotated, as by conneetion with. the flexible shaft of a dental engine, the hammer will be operated, regardless of the direction of rotation of the spindle, to impart blows to the plugging-tool. WVhen the spindle is turn edsay to the right 9 5 the spindle-stud g first acts against the cam g, forcing its tube back, thus compressing the spring H and lifting or retracting the hammer. N6Xt,Wl1011il10 spindlestud reaches the cam-shoulder, the cam-tube is released and the hammer is projected forward by the spring to deliver its blow. \Vhen the spindle is turned in the opposite direction, the stud lfiof the inner cam-tube g is presented in turn to the cam face or faces and the shoulder or shoulders of the outer cam-tube, the hammer being forced forward at rapid intervals by the action of the spring, as above explained. By the employment of the two concentricallyarranged cams or cam-ended tubes, we provide not only for operating the tool by the retation of the spindle in either direction, but are enabled to change the rapidity with which. the blows are delivered by providing one of the cam-tubes with duplicate cams.

In order to avoid the disagreeable eilects and sensations produced by the impact of one hard metal upon the other, we provide the hammer with a head consisting of a block of rubber, celluloid, wood, vulcanized fiber, or other material, which will partly cushion the blow and prevent the plugging-tool from operating with too much violence.

To prevent the plugging-tool from operating when it is desired to use it for picking up gold, &e., a slotted slide M, having a fingerpiece M, is attached, as shown,to the outside of the case near its lower end. This slide, when drawn up, acts upon the stud or set screw 70, projecting from the hammer, and prevents the hammer from striking the pluggin g-tool without interfering with the rotation of the shaft. \Vhen the slide is moved down, the slot therein for the stud 70 allows the hammer to reciprocate freely. By adjusting the A knob or pin in projects from the side of the cap or plug (1 into an oblique or spiral slot in in the wall of the ease A,so that by moving said plug in a rotary direction it will be raised or lowered. The slot m is graduated, the figures 1, 2, 3, &e., indicating the degree of pressure and force of the blow.

\Ve claim as our inventiou 1. The combination of the casing, the retary spindle, a reciprocating hammer, its actuatings ning, and the reversely-inclined eoncentric cams upon the spindle, substantially as and for the purpose set forth.

2. The combination of the casing, the retary spindle, a reciprocating hammer, its actuating-spring, and the concentric cam-ended tubes upon the spindle, the one tube being provided. with a single cam and the other with duplicate cams inclined reversely to said single cam, substantially as and for the purpose set forth.

The combination of the casing, the reciprocating hammer, the spring acting to project the hammer, the slotted slide on the easing, provided with the linger-piece, and the stud fixed to the hammer, projecting through slots in the casing and slide and acted upon by the slide to prevent movement of thehaminer by its spring, substantially as and for the purpose set forth.

In testimony that we claim the foregoing we have hereunto set our hands this 28th day of January, A. l). lSST.

SEBASTIEN LACAVALERIE. (TONSTAN'J DORIOT.

lVitnesses:

'liios. A. COXNOLLY, R. l).\ LE SPARHAWK.