Improvements in coin-actuated medical batteries / [Nelson Marshall Watson].

  • Watson, Nelson Marshall.
Date:
1902
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in coin-actuated medical batteries / [Nelson Marshall Watson]. Source: Wellcome Collection.

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    Watson’s Improvements in Coin-actuated Medical Batteries. abe— mm l- aaegi —. - _ COMPLETE SPECIFICATION. Improvements in Coin-actuated Medical Batteries. I, Nelson Marshall Watson, of No. 72 Brush Street, Detroit, Wayne County, Michigan, United States of America, Manufacturer, do hereby declare the nature of this invention and in what manner the same is to be performed to be particularly described and ascertained in and by the following statement :— 5 This invention rebates to coin actuated medical batteries, and consists in the con¬ struction and arrangement of parts hereinafter fully set forth and pointed out particu¬ larly in the claims. The object of the invention is to provide simple and efficient means, whereby, upon the insertion of a coin and the operation of a movable handle of the device, an electric 10 current may be closed through the hands of the operator, the arrangement being such as to enable the volume of current to be regulated and a further arrangment provided for cushioning the return of the movable handle when released. The above object is attained by the mechanism illustrated in the accompanying drawing, in which :— Fig. 1 is a front elevation of the machine. 15 . Fig. 2 is a rear elevation of the operative mechanism, the electric circuit showing in diagram and the base of the machine appearing in transverse section. Fig. 3 is a horizontal section, as on line 3—3 of Fig. 2. Tig. 4 is an enlarged detail, in section, of a portion of the operative mechanism. Fig. 5 is also an enlarged detail, in section, hereinafter explained. 20 Referring to the characters of reference, l designates a suitable base upon which the machine is mounted, said mechanism being enclosed in a suitable case 2, having a glass front whereby the operative parts and indicating scale are rendered visible. Fixed to one side of the base is a handle 3, adapted to be grasped by the hand of the operator. At the opposite side of the machine is a rotary handle, or crank, 4, 25 attached to the shaft 5 suitably journaled in the machine. Connected with the fixed handle 3 is one side of an electric conductor, or circuit, 6, which lead& to a battery, or source of electricity 7 and includes the coil of the electro-magnet 8, the opposite side of said line leads from the battery and terminates in a spring terminal, or con¬ tact point 10, insulated from the metal base 11 of the machine by the non-conducting 30 block 12, upon which the spring terminal is mounted. Pivoted upon the metallic base 11 is a bell crank lever 13, one arm of which stands normally adjacent to the spring terminal 10 and is adapted to be moved into contact therewith, said arm carrying a bevelled face 14, see Fig. 3, describing the segment of a circle and adapted to embrace and temporarily confine the edge of a coin. A 35 vertical coin shute 15 is pivoted upon a shaft 16 and is adapted to receive and direct the coin into contact with the beveled face 14 of the bell crank lever 13. Upon the shaft 5 carrying the crank, or handle, 4 is an eccentric 17, see Fig. 4, adapted to engage the inner end of a horizontrally movable pin 18, whose opposite end passes through the side of the metal base 11 and bears against the coin shute 15. As the 40 coin is directed into the shute 15, it passes downward and lodges against the beveled face 14 of the bell crank lever 13, at the same time the upper arc of the coin is engaged by the confining channels of said shute. A rotation of the crank or handle 4 will then carry the eccentric 17 against the pin 18 and cause said pin to tilt the coin shute 15 upon its shaft or pivot 16, thereby crowding the edge of the coin against the 45 beveled face 14 of the bell crank lever and forcing the end of said lever into contact with the spring terminal 10, thereby closing the circuit through said terminal and through the metal base and shaft 5 to the handle or crank 4, placing said handle, together with the handle 3, in circuit with the battery and completing the circuit through the body of the operator when said handles are held by the operator’s hands. 50 As the coin shute 15 is tilted further, through the operation of the movable handle 4*