US363152A - Press for dental flasks - Google Patents

Description

(No Modem 7 PRESS FOR DENTAL PLASKS, 6:0. I No. 363,152. Patented May 17, 1887.

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UNITED STATES ATENT rrrca,

MYRON M. MAINE, OF SOUTH MANCHESTER, CONNECTICUT.

PRESS FOR DENTAL FLASKS, 80G.

SPECIFICATION forming part of Letters Patent NO. 363,152, dated May 1'7, 1887.

Application filed July 17, 1884.

To aZZ whom it may concern.-

Be it known that I, MYRON M. MAINE, of South Manchester, in the county of Hartford and State of Connecticut, have invented cer tain new and useful Improvements in Presses for Dental Flasksand the Like; and Ido hereby declare that the following is a full, clear,

, and ex act description, whereby a person skilled p: ess and the flaskwhen the material forming the plate has been softened and spread and the flask closed.

The object of my improvement is to provide I a collapsible press for holding a dental flask with a yielding pressure, and so constructed to enable the operator to apply the pressure to any particular part and to any degree that may be desired, and while accomplishing these results it shall be a press that is cheaper in construction and more readily dismounted after use than prior devices of this class; and my improvement consists of a press in which the base and the platen are both made of thin spring metal, and are curved toward each other, so that a greater degree of adjustment is obtained than can be obtained by any prior device, the base and platen being connected to each other at each end by standards having one end threaded and bearing nuts fitting the threads, whereby the distance between the base and platen is determined, as more particularly hereinafter described, and pointed out in the claim.

In the accompanying drawings, the letter a denotes a dental flask of ordinary material and construction; I), the lower section; 0, the ringsection, and d the cover, the sections and the cover being when put together held against lateral displacement by means of the projecting lugs c d, which fit into dovetailed sockets in the adjacent parts of the flask. e

denotes my improved press as a whole, f the base, and g the platen, which are each formed of strips or plates of comparatively thin metal, preferably steel, curving toward each other in the center, and united at their outer ends by means of the screw-threaded standards h. Each of these standards has a broadened head, It, oranysimilar means for preventing it from slipping through a hole in the basc-platef, and bears a threaded nut, preferably of the butterfly pattern, with wings that enable it to be readily turned on the threaded stem of the stand, so as to apply the pressure to the side of the platen g opposite to the basc-plate. The platen and base-plate are preferably of the simple form, as above described; but, if itis desirable, they may be made each with a series ofarms extending'fron'i a common center.

When the press is not in use, the 'nuts can be unscrewed from the standards and the platen and baseremoved, so as to be packed in a very small space, and this isaceomplishcd without the aid of any tools.

In using my improved press the flask containing the roughly formed tooth -plate' is placed between the base-plate and platen and pressure applied until the base and platen are nearly flat, as illustrated in Fig. 2. If, on. account of any peculiarity of the jaw to be fitted, owing to a particularly thin alveolar ridge or other weak point as one or more remaining and projecting teeth, it is desirable to apply the pressure upon the flask at one side of their center, the nut on one of the standards is run down to a lower point than on the other, as indicated by the dotted outa by the press, and the vulcanization of theplate then goes on in the usual manner.

The standards are so supported in the base plate as to prevent their turning with the nuts when the latter are used to clam p the flask in the press. This may be done by making the standards angular in section and making the ,opening in the base to fit that angular outline.

The main advantages of my improvement are the avoidance of the danger of breaking delicate portions of the cast, spreading or breaking the blocks of teeth, and breaking down the arch of the plate, which are common results in the use of devices prior to myinvention.

I am aware that it is not new to provide a dental-flask press with screw-threaded standards, having nuts fitting such standards, whereby the parts are secured together, as such adeviceisshown in patent to J. D. Heigcs, No. 170,731, of December 7, 1875; and I am also aware that it is not new to provide a dental flask with a press having a platen of spring metal, as such is shown in patent to 6.

In combination With a partible dental flask,

a press consisting of a thin spring-metal base that curves upward, and is perforated at its ends to receive the standards,and athin springmetal platen curving toward the base, and

also perforated at its ends, so as to slide upon I the standards, the standards joining the platen and the base, and provided at one end with a broadened head and at the other with a thread, on which are fitted the adjustingnuts, all substantially as described, and for the purpose set forth.

MYRON M. MAINE. YVitnesscs:

CHAS. L. BURDETT, E. F. DIMOOK.

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