US1402525A - Dental instrument - Google Patents

Description

1. Sn MOSELEH.

DENTAL INSTRUMENT.

APPLICATION FILED MAR. I7, 1921.

Patented Jan. a, 1922.

f/G. /3 INVENTOR. Jim/m JMOJfLf/E ATTORNEY blufl tlhtt stares PATENT e es,

annnrn s. MosnLnn,. on CHICAGO, innrivors, iissrsnon'ro o. M. CARR DENTAL MANUFACTURING ,coivirenv, or nan-van, ccincaano, A oonronarroiv on cotton-lino.

Application filed March To (4Z2 whom it may concern: lie itknown that 1, JnnNIn S. MQSELER, a citizen of the United States,,re s1d1ng at Chicago, in the county of Cook and Statejof Illinois, have invented certain new anduseful Improvements n Dental Instruments, of which the following is a, spec fication.

My invention relates to dental instruments, more particularly adapted for usef for re moving calcareous deposits or scale from natural teeth and. affecting the displacement of the calculia from any straight, curved or 1920, Serial No. 378,473 and the objects of these improvements are First, to prov de an instrument of this classwith a shorter and iiferently shaped shank while maintaining c same length operating and cutting edge unnent so that said working portion is n re definitelyv under the control. orthe opdental instrument with a short shank of this class in which the axial line of the handle passes intermediate the cutting edge and the guiding or supporting portion of the shank or approximately in the middle of the concave, convex or straight cutter supporting portion of the shank instead of passing at the cutting edge, so that the central handle alignment is between the supporting portion and the cutting edge of the instrument, thus providing a maximum control of the cutting edge of the instrument; third, to provide an instrument with a shank of this class with a differently shaped cutting or planing portion than known before my application Serial No. 378,473, so that it is eflicient and not liable to injure the gum contiguous to the tooth when operating the instrument; fourth, to provide an instrument of this class which Specification of LettersPatent.

pporting portion thus bringing the workg portion closer to the handle of the 111- rater gniovidin an instrument'morej easily, 35 controlled in operation; second, to provide a DENTAL INSTRUMENT.

17, 1921. Serial no; 452,965.

is very easy and efficient- Vfith these and other objects in viewas will appear hereinafter my invention consists of certain novel features of construction combination and arrangement of portions a to manufacture and is durable wiil hereinafter described in vdetail and particularly set forth in the appended claims reference being had to the accompanyingdrawings and to the charactersof reference. thereon which form apart of this apphcat-ion.

In carrying out my inventionI provide a series of: tools each adaptedfor use upon a pro-determined shaped portion of a tooth and each has portion. The guiding portion serves to engage with the tooth-in advance of the cutting edge to steady the same whil e t he cutting edge is back of the line of the axis of lthe.

handle approximately an equal distance from alignment with the axis of the-handle so that the axis of the handle is intermediate the cutting portion and the guiding or supporting portion, so that the instrument is more easily controlled andnot so liable to tumor slip when in use. f

In the drawings Figure l is an enlarged side elevational view of one of my. instru-] ments showing the handle fragmentarily and showing the shape of the shank and position of the cutting edge and guiding portion relatively to the handle axis; Fig. 2 is anend view thereof and showing,by dotted lines, varying positions of'the eightdifierent cutting edges relatively to the octagonal sides of the handle thus showing the angularity.

of the cutting edge to the sides of the handle of the diiferent'tools in each'series; Fig. 3 is a side elevational view of one of theinstruments with a straight shank adjacent to the cutting edge as distinguished from that of Fig. 1 with a concave shank adjacent to the cutting edge; Fig. 4 is an end view thereof; Fig. 5 is a similar view' to that of Fig. 3 showing the shank in convex form adjacent to the cutting edge; Figs. 6, 7 and 8 are simi lar views showing the tools in modified form with lesser offset shank portions throughout; Fig. 9 is an enlarged View look ing toward the cutting edge of the instru-v mentpFig; 10 an edge view thereof; Fig ,11 anendview thereof; Fig 12 is an enlarged edge view of a concave adjacent to the cut- Patented J 3, 192 2.

a cutting edge and a guiding ting edge form of shank showing the cutting or planing portion and Fig 13- is a similar view of the convex adjacent to the cutting edge form of shank. I

S1m1lar characters of reference refer to 7 corresponding portions throughout the several views of the drawings.

The handle 1, right angle shank portionQ, curved shank portion 3, angular portion l, cutter supporting portion 5 and cutter portion.6 constitute the principal portions of my dental instrument.

For the sake of. illustration I'have shown the'handle portionl octagonal and extending laterally there from by means of a curve 2* at right angles is the right angled shank portion 2 which extends a short distance, and graduallyftapering,then proviced with a curved shank portion 3, then extendingbackwardly in anguiarfornrn-is the portion 4, which is provided on its extended end with the cutte supporting portion 5 which ext'ends approximately one half the distance from the cutter to the intersection of thex-curve' 3 and it is shaped differently with the different instruments dependent on the particular shape of'the place desired to use any instrument ofthe'particular series upon; These portions" 5 are formed into three definite series consisting of a concave, formon the side from whlch the cutter'proj'ec'ts,'shown best in Figs. 1, 6'and12' of the drawings, another straight, shown best in Figs. 3, 7 and 10 of the drawings, the other convex on the side from which the cutting edge projects shown best in Figs. 5, 8 and 7 13 of the drawing. The cutting portion 6 it will be noted leaves the shank at an obtuse angle 6 which angle is taken from the por- 1 p, ment is in use.

It will also be noted that these sides are rounded at the sides 6' shown best, in Figs. 9, 10 and 11so that they do not injure the gums at theside edges of the cutting portion of the instrument.

The cutting edges of the instruments it will be noted are positioned in conformity with octagonal sides of the handle so that with an instrument with eight sides there are eight differently positioned cutting edges in the series conforming in position with the 'ght sides of the handle 1 as disclosed best in Fig. 2 of the drawings by dotted lines showing the varying positions of the cutting edge and engaging endof the instrument.

Itwill be also noted that the axial line of the handle passes through the shank portion 5 between the cutting edge hand the other point of] contact at a point approximately 'mid'v'vay between the two vpoints of contact as showninithe drawings. 7

Itis obvious that with theconstruction in the various forms that the operator is en abledto reach thesurfaces of all the roots of the teethand removeall foreign substances betweenthe'teeth and the gum or tissue surrounding the teeth and leave the tooth with a smooth polished surface without grooves; that the shank of the instrument is so shaped and arranged and the position of the cutter relative to the handle'is so arranged that the operator can always holdthe instrument in position depending upon the instrument used in the series for, producing the proper re sults without causing grooves.

Having thus described my, invention what I. claim as new and desire to secure by Letters Patent is: V

jA dental instrument including, a handle portion, a shankpor'tion offset at a right angle therefrom then curved, then extending backwardly in a straight line on an angle to said handle portion, and a cutting edge positioned onthe'opposite side of the axial line of said handle from the offset portion of the shank whereby the instrument is easily held in balance and therefore easily controlled while in use.

In testimonywhereof, I have hereunto "set my hand at Chicago, Illinois, of February,.1921.

f JENN'IE S. MOSELER.

this 14th day

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