Specification of George Fellows Harrington : apparatus for drilling, cutting and polishing teeth.

  • Harrington, George Fellows.
Date:
1864
Catalogue details

Licence: Public Domain Mark

Credit: Specification of George Fellows Harrington : apparatus for drilling, cutting and polishing teeth. Source: Wellcome Collection.

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    - --- —■■■■■' ■———■! ■ ■■-—- ■ Harringtons Impts. in Apparatus for Drilling, Cutting, and Polishing Teeth, in the hand the thumb or finger of the operator is placed over the protruding end of the break lever, as shown in Fig. 1, so that by depressing that lever the break will be partially or entirely removed from the break wheel, thereby controlling or regulating the revolution of the tool at pleasure. Although the apparatus herein-before described and illustrated by my 5 Drawings is specially intended to be used for operating upon teeth whilst in the mouth, it is obvious that by increasing the power of the spring B the same apparatus might be employed in operating upon “ pieces ” at the work bench. And I may observe that although I have described and illustrated a certain arrangement of wheelwork for driving the tools, I do not confine or restrict myself to such arrangement, so long as the essential feature of my Invention be retained, namely, the driving of such tools by means of a barrel or volute spring. Having now described and particularly ascertained the nature of my said Invention, and the manner in which the same is or may be used or carried 15 into effect, I would observe, in conclusion, that what I consider to be novel and original, and therefore claim as the Invention secured to me by the herein-before in part recited Letters Patent is,— First, the general construction, arrangement, and combination of apparatus for drilling, cutting, grinding, and polishing teeth whilst in the mouth, 20 substantially as herein-before described. Second, the application and use to and in the driving or actuating of drilling, cutting, grinding, and polishing tools intended for operating upon teeth whilst in the mouth, of a barrel spring in combination with any suitable train of toothed gearing, substantially as herein-before described. 25 In witness whereof, I, the said George Fellows Harrington, have to this my Specification hereunto set my hand and seal, the Seventeenth day of October, One thousand eight hundred and sixty-four. GEORGE FELLOWS HARRINGTON. (l.s.) LONDON: Printed by George Edward Eyre and William Spottiswoode, Printers to the Queen's most Excellent Majesty. 1864.