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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    Provisional Specification. 2 A.D. 1864.—N° 1017. Harringtons Impts. in Apparatus for Drilling, Cutting, and Polishing Teeth. being contained within a tube or sheath fixed to the outside of the box or holder case of the clockwork, whilst its outer end, or that which protrudes beyond the sheath carries the required tool (the tools being made removable), so as to be changed to suit the operation to be performed. A small collar bearing is fitted inside the outer end of the tube or sheath to steady the 5 spindle in its revolution. When the spring is wound up the clockwork immediately commences to revolve, and thus imparts a rapid rotatory motion to the tool. In using this apparatus the clockwork case or holder is held in the hand of the operator, and the end of the spindle which carries the tool is introduced into the mouth, and the tool brought in contact with the tooth or 10 teeth to be operated upon. The essential feature of this Invention is the substitution of any suitable arrangement of spring clockwork for an archi- medean screw or bow for giving a rotatory motion to the tools intended to operate upon teeth whilst in the mouth. The revolutions of the tool are either arrested or controlled by pressing the thumb or finger against a break 15 wheel which is fitted on to the arbour or spindle of one of the train of wheels forming the clockwork, whereby more or less friction or resistance will be obtained, thereby regulating the speed of revolution of the tool. A catch may also be employed, fitted to jhe box, case, or holder, to temporarily arrest the motion of the clockwork when the apparatus is not in the hand of the 20 operator. SPECIFICATION in pursuance of the conditions of the Letters Patent, filed by the said George Fellows Harrington in the Great Seal Patent Office on the 22nd October 1864. TO ALL TO WHOM THESE PRESENTS SHALL COME, I, George 25 Fellows Harrington, of Sedgeley House, Ryde, in the Isle of Wight, Surgeon Dentist, send greeting. WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters Patent, bearing date the Twenty-second day of April, in the year of our Lord One thousand eight hundred and sixty-four, in the twenty-seventh year of Her 30 reign, did, for Herself, Her heirs and successors, give and grant unto me, the said George Fellows Harrington, Her special license that I, the said George Fellows Harrington, my executors, administrators, and assigns, or such others as I, the said George Fellows Harrington, my executors, adminis¬ trators, or assigns, should at any time agree with, and no others, from time 35 to time and at all times thereafter during the term therein expressed, should