US368179A

US368179A - Dental plugger

Info

Publication number: US368179A
Authority: US
Publication date: 1887-08-16
Anticipated expiration: 1904-08-16

Description

(No Model.)

F. ABBOTT.

DENTAL PLUGGBR.

.NO- 368,179 Patented Aug. 16, 1887.

WITN ESS ES Unirse STATES ArtNr Ottica.

w FRANK ABBOTT, OF N EV YORK, N. Y., ASSIGNOR TO THE SFS. VHITE DENTAL MANUFACTURING COB'PANY, OF FHTLADELPHTA, PENNSYLVANIA.

DENTAL PLUGGER.

SPECIFICATION forming part of Letters 'Patent No. 368,179, dated August 16, 1887.

Application filed Maru-h 21, 1837. Serial No. 231,746. (No model.)

To @ZZ whom it may concern: mer-raising tripping-lever carried by said Be it known that 1, FRANK ABBOTT, a citi spindle and also the position of the partsjust zen of the United States, residing at New York, after the lifting-lever has been tripped andthe in the county of New York and State of New hammer thrown forward. to strike the blow- 5 York, have invented certain new and useful receiving surface or end of said spindlecol- 55 Improvements in Dental Plug-gers; and I do lar. Fig. 5 is a view of a portion of the inhereby declare the following to be a full, clear, strument, showing more particularly thc front f and exact description of the invention, such section of the casing and the tripping-case, as will enable others skilled in the art to which the blow-receiving collar and the spindle be1ng 1o it appertains to make and use the same. drawn back, and the front end of the handle 6c My invention relates to improvements in or middle section of the casing being-shown dental pluggcrs of the typo known as handdetached and in section. Fig. (i is a view of pluggers, (as distinguished from enginethe tripping case detached, showing more driven pluggers,) in which the blows of the particularly its slotted side to accommodate I5 sliding hammer are communicated to the plugmovements of the tri pping-lever rocking there- 65 ger-point by means of a spring operated by in. Fig. 7 is a view of the end of said tripthe pressure of the plngger-point upon the ping-case, showing slots or recesses therein to iilling which is to receive the blow and which receive the projecting ends of a pin which is to be impacted or condensed in the cavity pivots the trippinglever in the spindle, and

2o of the tooth. which passes through the blow-receiving col- 70 The object of my invention is to improve lar, said pin ends tting said slots or recesses hand-pluggers by simplifying their construcof the tripping-case to prevent the spindle tion and improving` the effectiveness of their from turning. Fig. S is a view in elevation of operating organism. the incased hammer impelling or striking 25 To this end my invention consists of certain spring. Fig. t) is a View of the main portion 75 novel organizations of parts and combination of the rear casing-section, and Fig. l0 is a of devices which will first be described, with view of the minor or other portion of said the aid of the accompanying drawings, in derear casing section, showing` its connection tail, as embodied in the best way now known with a male-screw tube, which reciprocates a 3o to me, and then particularly recited in the female-screw tube or nut to control the power So claims at the close of this specilication. of the hammer or striking' spring to regulate In said drawings, Figure 1 is a view in elethe blow to be struck. Fig. l1 is a perspectvation of the improved plugger about the ive View of the retaining-plate coupling the usual size of such instruments. Fig. 2 is a two portions of the rear casing-section tof 3 5 longitudinal section theretlnough,enlarged for gether, with the capacity of the minor or end 8 5 the sake of clearer illustration, and showing portion to turn relativelv to the other portion the parts in their normal position or at rest. in regulating the power of the impelling or Fig. 3 is a view of the front end of the interstriking spring. nal parts ofthe instrument, partly in section, The casing of the instrument is preferably 4o and showing the parts in the position they octubular and' made in three main sections, a 9o cupy in operating, with the hammer raised front section, A, a main or handle section, A, and j ust prior to being tripped to deliver its and a rear section, A2 A3. The front section blow upon the plugger-point or tool-holder. is or may be roughened, as at a, to afford a Fig. L.tis a view substantially similar to that of better grasp for the fingers of the operator,

\ 45 Fig. 3, with the sliding hammer and tripping and is screw-threaded, so as to screw into the 95 portion of the instrument shown in dotted front interiially-threadcd end of the main scclines. This view shows more clearly the blowtion A. The front cud of the rear section, A2 receiving collar and its hard-rubber or equiv- A3, is likewise threaded to screw into the rear aient facing of the tool-carrying shaft or spininternally-threaded end of said main section 5o dle and the spring which acts npon the ham A. Said rear section is made up of two porroo 2 'Scalve tions, A2 A3, the portion A3 fitting in the portion A2 by means of a front sleeve, A4, forming part of the portion A, and said portion A3 having an annular, groove, a', to receive the bent end a2 of a plate, A5, fastened on said portion A2, with its bent end a2 passing through a slot, a3, into said groove c. By this couplingof the portions A2 A3 together the portion A3 swivels or turns on the portion A2, so as to revolve the sleeve A4 for a purpose which will hereinafter appear.

A central spindle, B, passes through the casing from end to end, and its 'ends are screwthreaded to receive the threaded ends of the tools or plugger-points b, one for each end of the instrument, as is common, so that thrust and pull blows can be delivered and all character of fillings reached. Separate views of the tools are also shown in Fig. l, and they may of course be secured in the tool-holding spindle in other ways than by the screwthread'ed ends.

The hammer C is fitted to the spindle B so as to be guided and slide freely thereon without frictional contact at its periphery. This.

permits easy action. The bore of the hammer is preferably of smaller diameter at its ends than between them, so as to fit the hammer to slide on the spindle by end bearings,c c. This reduces the friction to a minimum. The hainmer C is thrown forward by an impelling or striking spring, D, when the hammer is moved back to compress said spring, and is then released or tripped in the usual way. This spring, however, is peculiar. It has no frictional bearing at its outer side against the interior of the casing, which is objectionable. On the contrary, it is fitted with a coveringsuch as leather-havingvfrictional contact with the casing and in which the spring may be compressed and expand in action. This covering has another function. It prevents noise from the spring, stopping vibration and making the action of the spring noiseless. The front end of' said striking spring D bears against the rear end of the hammer and its rear end against the front end of an adjusting nut or thimble, E. This adjusting-nut is internally threaded, and works on male threads of the sleeve A4 of the swiveling portion A2 of the rear casing-section. The nut is held from turning by the front bent end a4 of the plate A5, which passes through a hole, a, in the casing-section A2 A3 into a longitudinal slot, e, of said nut E.

Obviously, upon turning the sleeve A4 of the swiveling portion A3 of the rear section of the casing, the nut E may be moved back and forth to regulate the tension or force of the strikingspring D, and consequently the force of the blows administered by the hammer C to the plugging point or tool.

yThe front end of the hammer is the striking end,V and normally rests upon an annular shoulder formed by the rear end of a sleeve, F, which I term the tripping-case.77 (See Fig.

2.) This tripping-case is confined between a shoulder, ai, of the main casing-section A and a shoulder or shoulders of the front casingsection, Amas, for instance, at as and cl2- and is locked from turning by a lug or pin, f, which enters a slot, f', in the casing-section A. (See Figs. 2 and 5.) The spindle B passes through this tripping-case F, audits front end f2 is much reduced, so as to permit the rear end of the case-raising spring G to be fitted thereon and bear against the tripping-case as a shoulder. The front end of said case-raising spring bears against a shoulder formed by a collar, H, pinned to the spindle B, the rear reduced end, h, of said collar II forming a sleeve, and

the space between the rear end ofsaid sleeve and the front end of the tripping-case defines and limits the range of endwise movement of the casing of the instrument on the central spindle.

The case-raisin g spring G, like the hammerspring D, is fitted Vwith a cover, g-such asr leather-and for the same purposes.

llithin the tripping-case F the spindle B is slotted, as at b', for example, to receive a rocking hammer raising and tripping lever or latch, I, pivoted by means of athroughfpin, z.

Thecnds of said pin also pass through ablowreceiving collar, J, so as to unite said collar firmly to the spindle B. This blow-receiving collar is fitted to work or slidein the enlarged bore of the rear endof the tripping-case F. .One side of said tripping-case `is slotted to permit of the passage of the tripping-lever I, and enable its tail end to rock or vibrate therein.

A spring, i', acts on the tail end of the tr1pping-leverV I, with a tendency to throw the rear or hammer end, i12, of said lever crosswise of the slot in the spindle in which it is pivoted.-

The lever I is peculiar. It has a curved end, i2, the center of the curve being the axis` of the lever. The end of the hammer, against which this curved end of the lever acts, is correspondingly curved, so that the rocking of the lever on its pivot merely causes its end to rub over the curved surface of the hami mer end without, by the rocking of the lever. per sc, causing any elevation of the hammer, as a square or flat surface would do. This lessens friction and conduces to regular smooth action. The tail end of the tripping-lever has a curved or cam surface, 2, to work against a cam-surface, f2, of the tripping-case F.

The operation of the instrument is as follows: The normal position of the parts is as represented in Fig. 2. Now'place the point of the plugging-tool on the filling to be compacted. Press on the casing, or push or pull, according to which end .of the instrument is used. This causes .the casing to slide on the spindle, and as the end of the hammer raising and tripping lever is in contact with the ham mer forces the hammerto slide on the spindle andl compress its impelling-spring. As the pressure continues the cam-surface on the tail end of the lever begins to work on the camsurface of the tripping-case, and it is rocked inward, so as to carry both ends of said lever within its slot in the spindle, and of course its hammer end out of lifting contact with the hammer. At the end of the necessary movement the lever is entirely withdrawn from contact with the hammer, or is tripped and released, and at this moment the striking-spring, with its accumulated power, impels the haar mer quickly against the blow-receiving sur face of the collar J, which during` the movement of the casing on the spindle has been protruded or exposed, as in Figs. 3 and 4, beyond the end of the tripping-case. The blows are thus received on the collar J and communicated to the tool or point through the spindle B.

The blow-receiving collar is preferably provided with a hard-rubber collar, J to deaden the sound of the blows administered by the hammer.

The advantages of my instrument are simplicity of construction and easy effective operation.

I claim as my invention-m l. The combination ofthe casing, the hammer, the striking-springof the hammer, the slotted adjusting-nut of said spring, the swivcling portion of the easing having an annular groove, and the interlocking connection of the casing fitting said slotted nut and annular groove, substantially as described.

2. The combination of the easing, an inclosed expanding` and contracting spring, and a souml-destroying cover for said spring between it and said casing, substantially as described.

3. The combination, in a dental pluggen of detachable casing-sections fitted with an internal detachable tripping-case conincd between shoulders of said detachable casing-sections, substantially as described.

4. The combination of the annular trippingcase, the spindle, the hammer fitted to slide on said spindle, and the pivoted hammer raising and tripping lever, substantially as described.

5. The combination of thc casing, the slotted spindle, the hammer, the tripping-lever pivoted in the slot of said spindle, and a camsurface in said casing to rock said lever to release the hammer, substantially as described.

6. The combination, with the hammer having a curved seat on its striking end, of a hammer raising and tripping lever having a curved lifting end to fit said curved end ofthe hammer, substantially as described.

In testimony whereofI affix my signature in presence of two witnesses.

FRANK ABBOTT.

Vitnesses:

ELI T. STARR, FRANK Ano'r'r, J r.