Specification of George Fellows Harrington : artificial teeth.

  • Harrington, George Fellows.
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: Specification of George Fellows Harrington : artificial teeth. Source: Wellcome Collection.

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    Harringtons Improvements in the Manufacture of Artificial Teeth, $c. at one time will, by shutting the mouth and pressing the wax (or plastic matter used) cause it to take the form of the two surfaces of the mouth, and the feeling and countenance of the patient will indicate whether the height and diameter of the teeth, palates, and beds, are agreeable and proper for the patient’s case, by which means an exact measure for the set 5 of artificial teeth will be ascertained by the dentist, and at the same time casts for obtaining models will be obtained; by such means the dentist, if he record the dimensions, which he will be facilitated in doing by means of the measuring apparatus hereafter explained, will be able to complete a set of artificial teeth without in most cases requiring to see the patient more 10 than once. . Description of Measuring Apparatus. Figure 1 is a plan of the apparatus, and Figure 2 a front view of the same, showing the mode of using the apparatus. Figure 3 is a plan and side view of the measuring instrument separately, a is a plate carried by the lower 15 ends of the three uprights 5, which are marked or graduated with divisions, as shown, c is the measuring instrument (the three bars of which are also graduated), which fits exactly on to the uprights b, so that when model pans such as above described, or a model set, or a set of artificial teeth, are placed upon the mould plate a1, the dimensions may be very correctly ascertained; and 20 recorded, My improvement in the manufacture of palates and beds for teeth consists in the use of tortoiseshell in their manufacture, and the process for doing which, together with the machine or apparatus employed, I will now proceed to describe. 25 Description of the Shaping or Moulding Apparatus. Figure 4 shews a plan of the apparatus for compressing and moulding the shell into the desired form for palates or beds; Figure 5, a longitudinal section; Figure 6, a transverse section through the dotted lines 1, 1. Figure 7 shews the instruments or levers when open before operating by side 30 pressure; and Figures 8, 9, 10, 11, 12, 13, and 14 show the other parts of the apparatus separately, a is a plate upon which the dovetail plate b slides. bl are holes in the slide b to receive the studs on the under side of the plate c, to which are attached the moulds, models, or forms (in type metal) for the beds and palates. The arms or levers d, d, are connected to the plate a by &5 the pin d1 passing through them, and thereby forming joints or axes upon which they move, d2, e£2, are links which connect the levers d to the pressing