US1397395A - Dental scaler - Google Patents

Description

W. H. H. BIXLER.

DENTAL SCALER.

APPLICATION 'FILED OCT. 14. I920.

1,397,395. Patented Nov. 15, 1921.

INVENTOR w'r J-l .04 m

In... as!

WILLIAll/I H. H. IBIXLER, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO DE SANNO 82; HOSKINS, A CORPORATION OF PENNSYLVANIA.

DENTAL SGALER.

menses.

To all whom it may concern:

Be it known that 1, WILLIAM H. H. 1312;- LER, a citizen of the United States, and resident of Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented an Improvement in. Dental Sealers, of which the following is a specification.

The object of my invention is to provide a special construction of dental sealer for the removal of heavy and rough deposits of tartar from teeth, which instrument shall be strong and durable, without bulkiness and having scraping edges which may be readily maintained in sharpened condition by ordinary stoning.

My improved instrument is specially apgum margin to the contact point of the teeth,

allowing a puslfor a pull movement, parallel to the long axis of the tooth. The instrument, while having no cutting blades or edges, has opposite fiat sides substantially parallel and the edges squared, making it impossible to out or destroy tooth striurture and at the same time permitting of easy removal of all rough depositions of tartar found in the interstices, and more particularly on the lingual surfaces of the lower anterior teeth.

The instrument consists of a long handle portion terminating in a shank, the end of which is bent to form an abrupt angular part with flattened walls in the plane of the curvature providing the angle, and further having the faces connecting the said flat toned walls made so as to provide substantially right angled or squared edges and at the extreme end having the said last mentioned faces brought together to proviue a chisel shaped end, all of which is more fully disclosed hereinafter and illustrated in the drawing forming a part of this application.

Referring to the drawings: Figure l is an elevation of my improved dental sealer; Figs. 2 and 3 are perspective views of the operating end of the instrument; Fig. 4 is an end view of the instrument; Fig. 5 is a transverse section across the operating end of the instrument; and Fig. 6 is a perspective view illustrating the application of the instrument in operating upon teeth.

4 is the handle, 3 the shank extending from the end thereof, and 2 is the operating Specification of Letters Patent.

e-tented Nov. 15, 192i.

Application filed October 14,1920. Serial No. 416,836.

sealer, said parts being formed of one continuous rod of metal properly shaped to constitute my improved dental hand tool. In the construction of the sealer, the end of the shank 3 is extended with some taper and said end flattened and bent in a more or less reverse or ogee curve beginning with the shank 3 and terminating in the chisel end 8. The operating end of this tool is flattened on opposite sides, as indicated at 11, and in shape it provides an. abrupt bend 9 with a more or less lightly curved por tion 5 between the said abrupt bend and the shank 3, and part 6 between the abrupt bend 9 and the chisel shaped end 8. in addition to the opposite surfaces 11 being flattened, the transverse edges connecting the said surfaces 11 are also made flattened, as at 10 and 12 (Fig; 5). The cross section of the operating end of the scaler will, therefore, provide the opposite flattened surfaces 11 and the transverse 'or edge flattened surfaces 10 and 12. By further reference to Fig. 5, it will be noted that the corners l8 and i l, formed by cross section, are approximately right angles, so that while the tool in its sharpened condition does not provide acute cutting anglesalong the corners, it does, however, provide sufficiently sharp corner which are excellently adapted for scraping the tartar from the surfaces of the tooth body. V

The edges 13, formed along the juncture of the surfaces 10 and 11 and extending for the whole length of the slightly curved portions 5 and 6 and their abrupt curved portion '7, .proviee cutting parts which are specially adapted for removing tartar by a push or pull movement of the tool end parallel to the plane of the surface 11 and in a direction away from the chisel edge 8. Un the other hand, the edges 14, along the juncture of the surfaces 11 and surface 12 of the parts 5 and 6 and abrupt curved part 9, provide cutting parts by whichthe tartar may he removed by a pulling action and laterally to some extent, if desired. The extreme end of the part 6 is beveled to form a chisel end, so as to provide abrupt corner edges a continuations of the edges 13, in addition to providing at the extreme end the chisel shape which would, in the plane of the surface 11, constitute a more acute angle. From examination of Fig. i, looking on the end of the tool, it will be observed that there is a gradual taper along the length of the part 6 leadin to the chisel end and substantially formed by the two surfaces 11. gradually approaching each other toward the chisel end, which will make the said end of somewhat less thickness than farther back along the part 6. This slight taper has the advantage of providing less bulkiness on the.

a narrowing of the surfaces 11 down to a.

point and thus permits the cutting or scraping edges 14 to enter spaceswhich otherwise could not be reached. In the more general use of this tool, the work is almost wholly performed by the edges 18 and 1a of the part 6; and asthe general length of this part is decidedly transverse to the length of the handle 4 of the tool, it is manifest that the shape permits of a thorough removal of tartar by a simple push or' pull manipulation, which gives both a positive and effective scraping action.

The angular corners l3 and 14 may be sharply defined by stoning down the sun faces 10, 11 and 12; and while this makes said corners excellently adapted forscrapthe teeth. It wi ing away of thetartar from the tooth body, there are no acute cutting. edges which might tend to cut awa the enamel covering of Y1 also be seen, that while the cross section shown in Fig. 5 is taken on line w-az of Fig. 1 across the part 5 and indicates a slight inclination of the surfaces 11, due to stoning the operating end 6' on a taper toward the chisel end 8 (Fig. 4);

the slight deviation of, the angular corners 13 and 14 from a right angle need not occur in the part 6, asthe stonin may be parallel to the a m line and hence in a direction longitudinally of the said part 6.

By having the bent portion 5, I am enabled to arrange the special operating end part6 transversely across the axial line of the handle and shank to insure a'more satisfactory balance of the tool when being given push or pull movement in scaling operation; and it will be further understood that while I prefer to have the part 5 formed with the flattened surfaces 10, 11 and 12 because of the facility thus provided for stoning the surfaces of the part 6, the part 5 need not be made to provide the angular corners 13 and 14:, but may be otherwise shaped in cross section, so long as it does not interfere wit the rectangular cross section of the part 6 and the provision of stoning its flattened surfaces 11. 7

It will now be apparent that I have devised a novel and useful construction which embodies the features of advantage enumer ated as desirable, and while I have 1n the present instance shown and described the preferred embodiment thereof which has be n found in practice to give satisfactory and reliable results, it is to be understood that I do not restrict myself to the details, as the same are susceptible of modification in various particulars without departing from the spirit or scope of'theinvention.

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

A. dental hand tool for scaling purposes, consisting of a handle extendedinto a shank whose operating end portion is reversely.

bent and terminating in a chisel end whose cutting edge is arranged transverely to the of the handle, said reversely bent end portion being substantially rectangular in cross section so as to provide four substantially right angled scraping edges, whereby the tartar may be removed from 'the'tooth by said scraping edges by a push or a pull movement handle.

In testimony of which'invention, I hereunto set my hand;

VVILLIAM H. H. BIXLER.

along the axial length of the,

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