US728375A - Dental vulcanizer. - Google Patents

Description

UNITED STATES Patented May 19, 1903.

PATENT OFFICE.

DENTAL vuLcANIzEn'.

l SPECIFICATION forming part of ',Iletters I atentNo. 728,375, dated May 19, 1903. Application led September 19,1962'. Serial No. 124,095. No model.) l

To a/ZZ whom it may concern.-

Beit known thatI I, CHARLES A.' DAVIS, a citizen of the United States, residing at Pasadena, in the countyy of Los Angeles and State of California, have invented certain new and useful Improvements in Dental Vulcanizers; and I de declare the following to be Va full, clear, and exact description of the invention, such as will enable others skilled inf the art to which it appertains to make and usethe same, reference being had to theaccompanying drawings, and to the letters ofreference marked thereon, which form a part of this specification.

This invention relates to new and useful*v improvements in dental or other vulcanizers; and it consists in the provision of means whereby the pressure of the cover bearing against the vuicanizing-boiler will be equalized upon all parts of its open edge, it being the purpose of this invention to improve upon and simplify this class of inventions by hinging the cover directto the receptacle inwhich the boiler is placed and securely clamping` Iwith-Va-Jlange E atits upperend, said ilange being adaptedto rest upon the raised pivotal the cover tothe boiler. l

More particularly the inventionwconsistsin the provision of a dental vulcanizer in which the boiler is supported in such al manneras to tilt slightly, if necessary, when the cover is swung against thetop of the same, whereby the pressure brought to bear upon the cover is equally distributed over the upperv edge of the boiler, causing a steam-tight ljoint as the parts are clamped together.

The invention consists, further, in` various details of construction and in combinations and arrangements offparts, as will behereinzv to better illustrate theinvention and to show the slight tilting movement of the boiler in order to secure an equalization of pressure between the cover and the upper end of the Y l boiler. Fig. 2 is a perspective View of the upper end of the collar of the casing, showing the shape of the upper edge of said collar, whereby the collar of the boiler is supported at two locations substantially diametrically opposite to allow for a'pslight tilting movement of the boiler. Fig.- 3 isaperspective view of the upper end ofthe boiler, and Fig. 4 is a side elevation of the Iupper portion of the boiler-supporting casing, showing the shape of its upper edge. l i

Reference now being had to the details of Vthe drawings by letter, A designates the vcasing of the vulcanizer, in which heat isintroduced by any suitable means, and B desigpartof the casing, the upper en d of which 'collar or casting has two raised pivotal portions B, which are diametrically opposite, and the portion of theupper edgeof said collar intermediate said raised portionsinclines downward, as at C C..

V Ddesignates a vulcanizing-boiler which is `preferably of cylindrical shape and provided portion B'.a t .pointsfdiametrically opposite leach other formed on the upper yedgeot' said Yfilange. When the boiler is mounted as de- ;scribed,it willbe observed by an examina tiou of Fig. l; oflthedrawings that said boiler Qwill be allowed tortiltuslightly in opposite di- ;'rections In order tov get this tilting effect, if preferred, the upper marginal edge of the ,jcollar of the casing'mayV be flat and the un- @formed with pivotal bearings, intermediate which bearings the undersurface of the iflange may be iuclir.ied,fthe essential feature ofv the inven tion being to produce means whereby a boilerfisadaptedto,tilt when the cover is forced against the same to produce asteam-tight joint.`V Immediately above the flange of the vulcanizing-boiler is a shoulder E', and F designates a cover vto theiboiler, which has an annularrecess'll", (shown clearly in Fig. 2 of the'drawings) in whicha gasket is placed, which recess is'adapted to receive the upper contracted annu-lar portion e of the boiler. On the upper surface of the cover is a ribbed extension H integral therewith, one end of which is mounted on a piv- 'ider ledge of the ilangaefthe boiler may be Inates a metallic collar or `@casting forming a IOO otal pin K', carried by an integral projection K, forming part of the casing. Said ribbed portion of the collar is recessed, as at L, Fig. 2 of the drawings, and is provided with an integral handle M, whereby the cover may be easily raised and lowered. At a location diametrically opposite the integral projection K, forming a part of the casing, is a recess N, through the walls of which the pin N' passes, forming a pivot on which the lower end of the threaded screw O is mounted. Said screw carries an adjusting-nut O on its threaded portion, whereby as the cover is closed over the top of the vulcanizing-boiler l said screw may be swung into a vertical position into the recess L in the ribbed portion of the cover, and by screwing down the nut O by means of ahand-wheel Q said nut will bear against the upper ribbed portion of the cover, and it will be observed that the pressure exerted upon the gasket interposed between the boiler and cover will be equalized, thereby causing a steam-tight joint. The cover of the vulcanizer is provided with the usual thermometer R and with the safetyvalve S and blow-off pipe T of the usual construction, and suitable apertures are formed in the circumference of the collar of the casing, whereby exit means is provided for the heat to escape from the interior thereof.

From the foregoing it will be observed that by the provision of a dental vulcanizer embodying the principle of myinvention apparatus of this kind is greatly simplied, and the cover to the vulcaniZing-boiler is hinged direct to the collar of the casing, thus dispensing with the usual separate cross-bar connection above the cover of the vulcanizer.

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

l. A dental vulcanizer in which the vulcanizing-boiler is adapted to tilt slightly as pressure is applied to a coverbearing against the boiler, whereby the pressure of the cover against the boiler is equalized, thereby making a steam-tight joint, as set forth.

2. A dental vulcanizer comprising a casing, a boiler mounted therein, a cover hinged to the casing and adapted to bear against said boiler, said boiler being adapted to tilt slightly as the cover is forced against the boiler,whereby the pressure of the cover against the rim of the boiler is equalized, as set forth.

3. A dental vulcanizer comprising a casing, a cover hinged thereto, a boiler contained within said casing and supported thereby, and means for applying pressure to the cover at a point opposite its pivotal portion, whereby as the cover is forced against the boiler, the latter is adapted to tilt slightly, thus causing an equalization of pressure upon the upper end of the boiler, as set forth.

4. A dental vulcanizer comprising a casing,

a cover hinged thereto, a locking-screw pivoted to the casing, a tightening-nut mounted on said screw and adapted to bear against the cover, whereby the latter may be forced down against the top of the boiler, which is adapted to tilt slightly, thus enabling the pressure to be equalized upon the upper end of the boiler, and thereby making a steam-tight joint, as set forth.

5. Adental vulcanizer comprising a casing, a boiler contained therein and supported thereon, a cover pivotally connected to said casing, a screw pivoted at a location diametrically opposite the pivotal part of the cover andadapted to swingintoarecessin the cover, and a tightening-nut mounted on said screw and adapted to bear against the cover, the contact-surfaces between the casing and the boiler being so constructed that the boiler is adapted to tilt slightly as the cover is forced against the boiler, thereby equalizing the pressure upon the same, as set forth.

6. A dental vulcanizer comprising a casing, a boiler contained within said casing and adapted to rest at two locations diametrically opposite on the upper edge of said casing, a cover pivoted to the casing and means for forcing the cover against the boiler, which is so constructed as to tilt slightly, whereby the pressure upon the same is equalized so as to make a steam-tight joint, as set forth.

7. A dental vulcanizer comprising a casing, a boiler contained therein and adapted to rest upon portions of the edge of the casing forming pivotal points at locations diametrically opposite, a cover hinged to the casing, and a tightening-screw for forcing the cover against the boiler, whereby the boiler is allowed to tilt slightly to equalize the pressure of the cover against the end thereof, as set forth.

8. A dental vnlcanizer comprising a casing, the upper end of which is provided with two pivotal points at locations diametrically opposite, a boiler contained within the casing and having a flange or collar adapted to rest upon said pivotal points, a cover pivoted to the casing, a screw also pivoted to the casing, and a tightening-11111: carried on said screw and adapted to bear against the cover to force the same against the boiler, whereby the pressure on the upper end of the latter is equalized, as set forth.

9. A dental vulcanizer having a casing, a boiler-supporting surface, upon the upper marginal edge of which are formed pivotal points at locations diametrically opposite, as set forth.

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

CHARLES A. DAVIS.

I/Vitnesses:

A. L. HOUGH, N. A. MAYHEW.

ICC

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