Improvements in artificial teeth / [Friedrich Ernst].

  • Ernst, Friedrich.
Date:
1898
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in artificial teeth / [Friedrich Ernst]. Source: Wellcome Collection.

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    N° 12,065 A.D. 1898 Date of Application, 27th May, 1898—Accepted, 24th Sept., 1898 COMPLETE SPECIFICATION. Improvements in Artificial Teeth. I, Friedrich Ernst, Dentist, resident at Hamburg, 21, Spaldingstrasse, Empire of Germany, do hereby declare the nature of tliis invention and in what manner d ' * ' * tlie same is to be performed, to be particularly described and ascertained in and by the following statement: — 5 The present invention relates to a new construction and arrangement of artificial teeth for the purpose of enabling a quick and easy exchange of the teeth made of minerals, or cast of suitable metal, in the plate which holds them, the teeth per¬ mitting of being fixed singly, or as a number of teeth connected in one piece, in fact in any form, as cutters, comer-, or cheek-teeth to caoutchouc plates, or to 10 the so-called bridge-work metal plates. For this purpose the tooth is so formed at the back and beneath its crown, that a bridge or wedge-shaped piece is obtained which may be divided into two cheeks connected with each cither and provided with a groove, in order to be pushed, in longitudinal direction, into a corresponding guide-groove of a metal casing containing a spring of suitable metal, which springs 15 into the said groove when the tooth has reached its proper position. The metal casing is provided either with a metal tongue, as known, or, in the case of several teeth connected firmly with each other, also in the of block-teeth, with a metal plate which can be vulcanized to the caoutchouc, or soldered to the metal plate, or, in the latter case leaving out the tongue, the metal casing can, be soldered immedi- 20 ately to the tooth plate. Through this peculiar formation of the sliding-teeth which are firmly secured in the metal casing, from which they can only be removed by force, the great industrial advantage is obtained over the known pinned teeth and other artificial teeth firmly connected with the plate, that, when one or several teeth should break, the same can immediately and easily be replaced without the wearer 2d having, for any length of time, to dispense with all the teeth, or with the lower or upper plate; besides the work of replacing is much easier than formerly, as it can be carried out without the aid of special tools, very quickly, and requires no skill. By the accompanying drawing a few forms of execution are given as example. 30 Figs. 1 and 2 are side- and back-views respectively of a single front tooth. Fig. 3 is a section from x to x of the same tooth. Figs. 4, 5 and 6 are a central section, a top- and front-view respectively of the metal casing. Figs. 7 and 8 are side- and back-views of a low cheek-tooth which does not give 35 much room for fastening. Fig. 9 is a section from y to y in Figs. 7 and 8. Figs. 10 and 11 are a central section and a top-view of the metal casing. Figs. 12 and 13 are a somewhat altered form of a cheek-tooth in side- and back- view. 49 Fig. 14 is a section from z to z in Figs. 12 and 13. Figs. 15 and 16 are a central section and top-view of the metal casing. Fig. 17 is the top-view of an upper-teeth caoutchouc plate with single and block-teeth, according to the present invention. [Price 8d.]