US1129634A - Wax-carver. - Google Patents

Description

J. B. BUCHANAN. WAX CARVER.

APPLICATION FILED JUNE 27, 1914.

1, 1 29,634. Patented Feb. 23, 1915.

W/TNESSES: J B B 11% ran as. ac 0120/2. z 14TTOR/VEY E NORRIS PETERS CQ. PHOTC-LITHCL, WASHINGTON. D, C.

JAMES B. BUCHANAN, OF SEATTLE, WASHINGTON.

WAX-CARVER.

Specification of Letters Patent.

Patented Feb. 23, 1915.

Application filed June 27, 1914. Serial No. 847,676.

To all whom it may concern:

Be it known that I, JAMES B. BUCHANAN, a citizen of the United States, residing at Seattle, in the county of King and State of lVashington, have invented certain new and useful Improvements in lVax-Carvers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to wax carvers, and more particularly to an instrument for use by dentists for hollowing out the wax impression of a cavity; the principal object of the invention being to provide a device, including an aspirator, for melting and siphoning wax from any part of the impression without distorting its shape or marrmg the surface adjacent the excavation.

It is customary in making dental inlays to make a wax impression of the cavity, secure a casting of the impression in a suitable non-corrosive metal, and cement the casting in the tooth. It has been found that, owingto the weight of the metal and the peculiar shape of some inlays, the limited holding surface is insufficient to prevent the cement from breaking and loosening the filling. In correcting this feature, I have provided an instrument for hollowing out the wax impression or cutting any portlon of it away, so that when it is cast it will present the form of a light shell into which a sufficient quantity of cement may be placed to obtain satisfactory anchorage onto the tooth and at the same time out down the weight of the inlay. In accomplishing these objects, I have provided the improved details of structure hereinafter described, and illustrated in the accompanying drawings, wherein Figure I is an elevation of a wax carver constructed in accordance with my invention. Fig. II is an enlarged longitudinal section of the same. Fig. III is a transverse sectional view on the line IIIIII, Fig. II. Fig. IV is a similar view on the line IV-IV, Fig. III, looking in the opposite direction.

Beferring more in detail to the parts: 1 designates a metal body, preferably round and of sufficient size and thickness to retain heat for a certain period of time. Extending forwardly from said body is a neck 2 having a central aperture 3, which extends into said body and which is adapted to receive a tube 4 having a flared outer end 5. lflntering the rear of the body member is a second and smaller aperture 6 in which is rigidly mounted a carving tool 7, comprising a small tube that curves downwardly, as shown.

Iiigidly mounted on the outer face of the neck 2, and concentric with the tube 4, is a tube 8, which extends a considerable distance beyond the end of the tube 4, and which is provided with a laterally projecting tube 9. The tube 9 is rigidly secured to the tube 8 and enters the same at a point adjacent the neck 2 and at the rear of the flared end 5 of the tube 4 and carries a nonheat conducting tube 11 of fiber or the like, which abuts against a collar 12 on the tube and carries a flexible rubber tube 13 that may be used as a mouth piece or connected directly to a pressure tank (not shown).

In using the device, presuming the parts to be constructed as described, and it is desired to excavate the rear face of the wax impression of a. cavity; the instrument is placed over a Bunsen burner and the body 1 heated sufficiently to melt wax. The operator then lifts the instrument by grasping the fiber tube 11, touches the carving tool 7 to the wax impression and blows strongly through the rubber tube 13. This action causes air to rush at a high velocity past the tube 4 and creates a suction therein, which is transmitted to the tool 7 and draws the wax, as it is melted, from the impression. It is apparent that as the tube 4 is much larger than the tube 7, the suction through the small tube is much greater, as compared with the velocity of the air through the tube 4, therefore making it possible to secure excellent results with the breath as the motive fluid. By flaring the mouth 5 of the tube 4, the velocity of air from the mouth-piece is increased at this point, and the hot air from the tube 7, which has expanded in the tube 4, is drawn into the current of air, through the tube 8, and thence to the atmosphere. In cleaning the tube'Y, which may become obstructed by wax and particles of foreign matter, the body 1 is heated to melt the wax, the finger is placed over the free end of tube 8 and a current of air blown into the tube 13.

Having thus described my inventiomwhat I claim as new therein, and desire to secure by Letters-Patent, is':' i

l. A wax carver comprising a heat retaining body, and a carving tool adapted to receive heat from said body.

2. A wax carver comprising a heat retaining body, a carving tool adapted to receive heat from said body, and means for creating suction through said carving tool.

3. A wax carver comprising a heat retaining body, a carving tool adapted to receive heat from said body, and having a central duct, and means for creating suction through said duct.

4:. A wax carver comprising a heat retain ing body, a carving tool comprising a downwardly turned tube rigidly mounted in and adapted to receive heat from said body, and an aspirator for creating suction through said tool.

5. A wax carver comprising a heat retaining body, a tubular carving tool adapted to receive heat from said body, a tube projecting from the opposite side of said body and communicating with said carving tool, a second tube projecting from said body and concentric with said first tube, and a third tube projecting laterally from and communicating with the second tube.

6. A Wax carver comprising a heat retaining body, a carving tool, a tube projecting from the opposite side of said body and communicating with said carving tool, a second tube rigidly secured to said body, and concentric with and projecting beyond said first tube, and a third tube projecting laterally from and communicating with said second tube at a point adjacent said body.

7. A wax carver comprising a heat retaining body, a carving tool comprising a downwardly curved tube rigidly mounted in and adapted to receive heat from said body, a tube projecting from the opposite side of said body, of greater cross section than said carving tool tube, a second tube rigidly mounted on said body and concentric with and projecting beyond said first tube, a thirdv tube extending laterally from and communicating with said second tube at a point adjacent'said body, a non-heat conducting tube mounted, on said third tube, and a flexible tube on said non-heat conducting tube, for the purpose set forth.

8. In a wax carver, a heat retaining body, a tubular carving tool in said body, a tube having a flared end projecting from the opposite side of said body and communicating with said carving tool, a second tube rigidly mounted on said body, and concentric with and spaced from said second tube to form an annulus therebetween, a third tube communicating with said annulus, and a mouth piece on said tube whereby a current of air may be forced through said annulus and past said flared end to create a suction in said first tube for said carving tool.

In testimony whereof I afiix my signature in presence of two witnesses.

JAMES B. BUCHANAN. Witnesses LYNN A. ROBINSON, LETA E. CoA'rs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.

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