US605171A - Dental plugger - Google Patents

Description

-(No Model.)

. F. S. AVIL.

I DENTAL PLUGGER. No. 605,171. Patented June 7,1898.

ATTORNEYS,

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UNITED STATES PATENT FFICE.

FRANCIS s. AvIL,' oF PHILADELPHIA, PENNsYLvANIA.

DEjNTA L PLUGGERQ s'PEoIr rcA'rIoN forming p r of LettersPatent No. 05,171, dated June 7, 1898.

Application filed November 10,1897. seen 116 6573392. on model.)

To all whom'it may concern/. I u

Be it known'that LFRANOIS SQAVIL, a citizen of the United States, residing in" the city and county offPhiladelphia, State of Pennsylvania, have invented a new and useful Improvement in Dental Mallets,which improvement is fully set forth in the followingspecification and accompanying drawings, I p

My invention consists. in adapting a dental mallet to be adjusted in difierent positions of a circle around the'casingor handpiece without necessarily turning orhloving the latter or affecting the power which operates the mallet.

Figure 1 represents a longitudinal section of a dental mallet embodyingmyinvention.

Fig. 2 represents a side elevation of the parts of the same removed from thecasin'g or handpiece. Fig: 3 represents a "side elevation of the casing thereof. Fig. 4 represents a side elevation of portion of the spindle of'the device.

Fig. 6 representsan end viewofthe casing. Fig. 7 represents'a longitudinal'section of a portion of. the nose of the device and-parts adjacent thereto on an enlarged scale. Fig. 8 represents a transverse section of a portion of the inner rim of the nose, a dog or catch therein,'and'the adjacent end of fthe casing, whereby said nose may beheld in either of the positions to which it mayberot'a'tede Fig. 9 represents aperspecti've 'vie'w off adetached part.

Similarletters of reference indicate corresponding parts in" the figures. Q j A Referring' tothe drawings, A designates a casingwithinwhieh is mounteithe; spindle B, to which powerfmay'be imparted in any suitable manner, said spindle being provided with the stem D,,which freely enters the open-' ing E in the plunger 0. Projecting from the stem D is the stud F, which freely enters the bifurcation ofthe neck -Gof a eollar H, which freely encirclessaid" stem D, contiguous to the end of the plunger C,theo'pposite faces of said collar. and plunger being helical, so as 'to interlock or couple "the spindle and plunger when'the spindle is rotated in one direction and permit said collar to slide on said stem when the spindle is rotated in the reverse direction. The plunger 0 has connected with it the stem J, which is thus capable of receivnut.

Fig. 5' represents a transverse section. on line mag-Fig. 1.

ing both rotary and reciprocating movement when the device is operated, said stem J bein g guided in the stationary nut K, the latter being'fscrewed into the casing A and'having amille'd rim L, which is accessible outside of said. casing, so as to readily adjust said nut, it being noticed that the adjacent ends of the nut and plunger 0 are helical and shouldered, so that when said plunger has made its revolution it'wi'll drop from the shoulder on said The plungerv then receives an advance motion with the power of a blowfby the action of the spring M, which I encircles the inner end of thespindle B and the'neck G of the collar H and bears at one end against said collar and at the other end against the sliding collar N, which'freelyflencircles the spindle B and has wings P radiating theretudinally-extendingslots Q int'h'e ca'sing A,

said wings being screw-threaded and engaged by the sleeve P, which encircles the slotted portion of the casing and serves whenrotated to move the collar N, and'thereby; adjust the tension of the spring and the fforce'ofthe blow. When the spindle is rotatedin reverse orderand the collar 11 rides'freely on the plunger, as has been stated',"' the plunger is held immovable, owin'g'to the engagement of the shoulders ofjthe helical faces of said plunger and coupling-nut.

The nut K, which is struck by the plunger 0, acts as a stop for said section and limits the play thereof. Within the casing in front of the nut is the segmental plate R, which is 'mounted on said casing, and is provided with the plunger 0 and so is' adaptcd to receive the blow of the latter. 7

T designates a collarwhioh has a flange on its periphery, the same being freely engaged by the flanged rim T the latter being screwed to the front end'of the casing, thus retain-' the segmental plate W, which is pivotally' connected with said nose and has one side in the path of motion of the pin U, which freely occupies the boreor perforation of said eollar '1, so as to be advanced by the said pin, the side of said plate opposite to said pin being adapted to strike the head IV of the plugger-point X of the device, said head being fitted within said nose and pressed inwardly by the action of a spring suitably applied.

In the inner edge of the rim T is the springpressed dog or catch Y, which is adapted to enter either of the openings Z in the edge of the casing A opposite to said rim, so as to lock the rim T and prevent improper rotation thereof as the nose is rotated.

The operation is as follows: The nose is turned on the casing so as to bring the point X to the desired position or degree in the circle said nose may turn. As the spindle is rotated the plunger 0 is drawn back and then dropped, it being noticed that said plunger slides on the stem 1), but remains connected therewith, owing to the stud F and bifurcated neck G, in which said stud is adapted to play. As the plunger drops its stem J strikes the plate R and the latter strikes the pin U, and thus by means of the intervening segment or plate \V the blow is imparted to the pluggerpoint, the effect of which is evident.

XVhile the engine or motor is running the mallet may be rendered inoperative b Y pressing the thumb-piece S, whereby the segment It is removed from the adjacent end or stem of the plunger, so that the latter while receivingitsreeiprocating motion is prevented from striking said segment.

The end of the casin g which forms the bearings of the nose is deflected, so that said nose presents the mallet proper or tool therein at an angle to the casing, and the angular position of the nose is preserved at any part of the circle which the nose may describe in its rotation on its casing.

Projecting from the head IV of the pluggerpoint is a stud or lug \V which is adapted to enter the groove or recess on the inner face of the adjacent portion of the nose, whereby said head is prevented from rotation either while screwing the plugger-point to said head or during the operation of the mallet.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is-

lar and rotatable therewith, a point or tool fitted to slide in said nose-piece, a sliding pin in said collar, means for freely connecting said collar with said casing, a plunger, and means for transmitting a blow from said plunger to said pin and consequently to said point.

2. In a dental mallet, a casing, a perforated rotatable collar mounted in the outer end thereof, a nose-pieee secured to said collar and rotatable therewith, a point or tool fitted to slide in said nose-piece, a sliding pin in said collar, swinging plates at opposite ends of said pin in said nose and easing respectively, and a plunger, the latter being adapted to strike the plate in the casing.

In a dental mallet, a casing, a perforated rotatable collar mounted in the outer end thereof, a nose piece secured to said collar and rotatable therewith, a point or tool fitted to slide in said nose, a sliding pin in said collar, a flanged rim secured to said easing, a plunger, and means for transmitting a blow from said plunger to said pin and from said pin to said point, said collar having a peripheral flange which is freely engaged by said flanged rim.

t. In a dental mallet, having a casing, a nose rotatively mounted thereon, and amovable pin fitted in said casing, swinging plates at opposite ends of said pin, one plate being mounted on said casing and the other plate being mounted on said nose, the plate on the casing being adapted to be engaged by the blow-delivery mechanism of the device, and furthermore adapted to be removed from the action of said mechanism.

5. In a dental mallet, a swinging plate mounted in the casing, adapted to be engaged bythe blow-delivery mechanism, and to transmit the blow to the plugger-point or mallet proper, said plate having a linger-piece thereon, which may be engaged from outside of the casing to remove said plate from the action of said mechanism and avoid the impartation of a blow or blows to said point.

FRANCIS AVIL.

\Vitnesses:

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