US717158A - Artificial tooth and anchor. - Google Patents

Description

Patentod Dec. 30,1902, s. 8. 81.00". ARTIFICIAL TOOTH AND ANCHOR.

(Application filed Nov. 9, 1901 (No Model.)

R /JTNEEEES:

UNlTE STATES PATENT OFFICE.

SAMUEL S. BLOOM, OF PHILADELPHIA, PENNSYLVANIA.

ARTIFICIAL TOOTH AND ANCHOR.

QPECIFICATION forming part of Letters Patent No. 717,158, dated December 30, 1902.

Application filed November 9, 1901. Serial No. 81.748. (No model.)

To to whom it may concern:

Be it known that I, SAMUEL S. BLooM, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Artificial Teeth and Anchors Therefor; and I do hereby declare the following to be a full, clear, and exact description of said invention, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

One of the means for connecting artificial teeth with the plate or support therefor involves the use ofpins the anchorage of which is inserted in the tooth before baking. As most metals fuse under the temperature required to bake the porcelain of which the teeth are made, platinu m is usually employed. Sometimes the pins are integral with the anchorage and are made entirely of platinum; but as this metal is expensive attempts have been made to make the anchors only of platinum and to secure pins of German silver and other metal cheaper than platinum to said anchors. Diificulty has been experienced in obtaining a firm and durable union between the silver pins and the platinum anchors, and difliculty has also been experienced in properly locating the anchors in the molds in which the teeth are baked.

The object of this invention is to provide an improved anchor which can be given its proper location by means of the old and wellknown form of mold in which holes are formed for the reception of pins, said anchor affording means for a perfect soldered connection with the pins of German silver or other suitable metal and for steadying and protecting said pins. This object is accomplished by causing the anchor-tube to project beyond the tooth-body to afford a more secure bearing for the pin that is to be soldered therein.

To these ends the invention consists in the anchors and in the connection therewith of pins, substantially as hereinafter described and claimed.

In the drawings, Figure 1 represents a section of a tooth greatly enlarged and showing one form of the platinum anchor embedded therein. Fig. 2 represents a similar view showing a pin in the position which it occupies when secured to the anchor and the tooth.

Fig. 3 represents adetail section of the anchor shown in Figs. 1 and 2. Figs. 4 and 5 represent, respectively, an enlarged section and a perspective view of modified forms of anchors.

Similar reference characters indicate the same parts throughout the several views.

One form of artificial tooth is represented at a, and what is commonly known as the pin-flange thereof is represented at b.

The platinum anchor is represented at c, and d representsa pin having a head d,which pin is secured in the anchor by solder, the head of said pin being adapted to be embedded in the plate to which the tooth is attached. The anchor consists of a flaring or tapering shell of metal, such as platinum, which is fusible only at a temperature higher than that required to bake the material of which the tooth is made. As shown in Figs. 1, 2, and 3, the anchor is formed of a hollow shell, which is flared or tapered slightly and uniformly from. end to end. As represented in Fig. 4:, the flaring or tapered shell may be shorter than represented in the other figures, and in this case it is formed with an extension 0, the walls of which are parallel. The anchor represented in Fig. 5 is similarin shape to that shown in Fig. 3; but it is cut away or formed with an open space along one side in order to save metal.

In using any one of the forms of anchor shown in the drawings the anchors are or may be placedin the molds with the smallends resting in the holes provided in such molds for the ordinary purpose of holding pins. The larger ends of the anchors project into the cavities of the molds which are filled with tooth material. The anchors are then preferably filled with wax or other suitable material which will prevent the tooth material from entering the anchors. The cavities of the molds are filled and the teeth are baked in the usual manner. During the baking operation the wax, if such is employed, will be burned out, leaving the space inside of the anchors ready toreceive the pins, as presently described. After the teeth are baked and are removed or delivered from the molds in the ordinary way a small amount of solder may be inserted in the anchors and the pins d pushed therein, as represented in Fig. 2. Owing to the flared or larger inner ends of the anchors, sufficient space is left around the inner ends of the pins to firmly hold said pins Without exuding from the anchors. The smaller ends of the anchors project from the pin-flange substantially as represented. This steadies and strengthens the pin, and when said anchors project far enough practically the entire stem of the pin will be covered with the platinum, and hence there is less liability of the silver of the pin or the silver solder which is employed causing the rubber plate to become spongy around the pin.

Having thus described my invention, What I claimas new is '1. An artificial tooth having an internally flaring or tapering shell of metal embedded SAMUEL S. BLOOM.

Witnesses:

JAMES G. ATTRIDGE, STEPHEN K. CLIFTON.

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