Improved crutch / [Harry Jones].

  • Jones, Harry (Dancer)
Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: Improved crutch / [Harry Jones]. Source: Wellcome Collection.

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    Jones’ Improved Crutch. The air valve (G) is fastened to the air tube (C) by means of a button at the end of the valve within and a nut outside the tube and is of simple construction, being perforated at the end for the through passage of air and threaded interna^ v to receive an externally threaded tubular plug of brass or other similar matena with a lateral perforation near the inserted end and a solid head which seals t e •> perforation in the air-valve when screwed home, a leather washer being placer •between such head and the valve the better to prevent an escape of t e contained air. . . The air tube (C) is inflated through the threaded tubular plug and air valve by the aid of an air pump attached to the outer end of the plug and used in the usual way. The sockets (F, F,) receive the stock heads of the crutch. The stock inay be made of metal tubing and is fitted with an adjustable handle (I) of india rubber or other suitable material fastened to the stock by means of a metal clip band which is held by a screw at any desired height. . The foot of the stock is made of two metal tubes, one of which slides within the other. At the top, within the outer tube, I place an iudia-rubber block (J) which acts as a cushion and at its lower end 1 employ a screw cap or adjustable screw cone (M) to keep in position the inner tube which I provide at its external end with a bulbed plug or foot pad (N) composed of india rubber and vegetable or 20 other fibre and fastened in the tube by rubber solution or cement. The top of the inner tube is covered with a leather washer held to it by a flange-headed screw and provides a compressed air chamber (K) between it and the india rubber block (J) which is self acting and gives additional elasticity to the crutch. The stock of my crutch may be either single or bifurcated as shewn in my 25 drawings. Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed I wrould have it to be understood that I do not claim as of my invention or the exclusive use of air chambers or air valves, wrappers pouches curved steel frames or plates, stocks, 30 adjustable handles, india rubber cushions and composite foot pads except when the same are constructed and employed according to my invention nor do 1 claim the use of tubes, sockets, screw caps or cones, flange headed screws or washers or of any of the separate mechanical parts of the apparatus employed by me but I declare that what 1 claim is 35 1. The manufacture and use of a detachable pneumatic crutch head constructed and employed substantially in the manner and for the purposes hereinbefore described and shewn in the drawings hereunto annexed. 2. The manufacture and use in pneumatic crutch heads of an air valve constructed and employed substantially in the manner and for the purposes herein- 40 before described and shewn in the drawings hereunto annexed. 3. The manufacture and use of an adjustable crutch handle constructed and employed substantially in the manner and for the purposes hereinbefore described and shewn in the drawings hereunto annexed. 4. The manufacture and use in crutches of a self acting compressed-air foot 45 apparatus constructed and employed substantially in the manner and for the purposes hereinbefore described and shewn in the drawings hereunto annexed, and 5. The combination and arrangement of parts constituting my improved crutch constructed fitted and employed substantially in the manner and for the purposes hereinbefore described and illustrated by the drawings on the sheet hereunto 50 annexed. Dated this 27th day of July 1894. HUGH HYNDMAN, 6, Chichester Street, Belfast, Agent for Applicant. London : Printed for Her Majesty’s Stationery Office, by Darling & Son, Ltd.—1894