US2230105A - Telegraph key - Google Patents

Description

Jan. 28, 1941. M, CROSBY 2,230,105

TELEGRAPH KEY Filed Sept. 30, 1938 Fly. 2

ATTORNEY Patented Jan. 28, 1941 UNITED STATES PATENT OFFICE TELEGRAPH KEY Murray G. Crosby, Riverhead, N. Y., assignor to Radio Corporation of America, a corporation of Delaware Application September 30, 1938, Serial No. 232,498

lClaim. (Cl. 178-401) This invention relates to a new and novel 6 and connected by means of a flexible lead a pneumatic telegraph key or other type of control to a terminal stud 10 which is provided with a key which may be inserted in the mouth of a binding nut l2 and is supported out from the end human being and operated by pressure from the of bowl 4 by means of stud It and suitable insu- 5 lungs and mouth cavities. lating washers 20 and 2!. A metallic contact or An object of this invention is to simplify and arm 9 has a contact member mounted on its unimprove a telegraph key of the pneumatic type. derside facing contact 8. The end of member 9 Another object of this invention is to provide substantially near its point of support is proa new and novel control key which gives ireevided with terminal lugs H which provide elec- 10 dom of movement of the hands for other operatrical connection to an external circuit which 10 tions, and also allows control of circuits by perthe device of this invention is to control. Memso-ns who have lost the use of one or more limbs. her 9 is insulated from stud H) by insulating A feature of this invention is the novel ar- Washers 2t and 2|. rangement of a fluid chamber having a mem- Figs. 3 and 4 show another embodiment which brane enclosing a portion thereof with contact uses a stem and chamber made for the same 15 means adjacent the membrane whereby the depurpose but not following the shape of the device vice is actuated by pressure within the chamber shown by Fig. l and comprises a mouth piece from the lungs and mouth cavities of a human till, a stem m2 having a. passage I03 connecting being and has the general appearance of that to an air chamber I05 in bowl I04. Contact of an ordinary smokers pipe. I03 is cemented to member I06 and is connected 20 I have found out through my close contact to a metallic support arm III] by means of a and experience with communication telegraph flexible lead Hill. A metallic strip I09 has the operators that a control key of my invention other contact mounted upon it and is secured to makes possible asmoother operation of telegraph bowl I94 by means of a mounting which comsending than is possible by the ordinary type of prises an insulating bushing H4, washers H5, 25

hand key. Also, the speed of control of a key of nut H6 and terminal stud Hi. my invention is greater than that of the ordinary The other embodiment shown by Fig. 5 is gentelegraph key. This smoothness and quickness erally similar to that of Figs. 1 and 2, except of control is made possible by the fact that the for the alternative arrangement wherein conswitching is controlled by the movement of the tact 9 is secured to a cover or a metallic cross 30 human tongue which may be actuated at a rapid member 6. A piston 20 has contact 8 mounted ate, on it which is connected to binding post 25 This invention will best be understood by rethrough spring 22. Gasket 28 makes the piston ferring to the accompanying drawing, in which: air-tight and stops 29 provide a resting position Fig. 1 is an elevation of my improved key; when the key is ofi. Connection is made to 35 Fig. 2 is an end view of Fig. 1; cross member 6 and contact 9 by means of bind- Fig. 3 is an elevation of another embodiment ing post assembly 26. of this invention; While only a few embodiments of this im- Fig. 4 is an end view of Fig. 3; and proved control key are shown, it is to be dis- 4 Fig. 5 is a section similar to Figs. 1 and 2, tinctly understood that this invention should showing another modification for actuating the not be limited to the precise devices indicated. diaphragm. by means of a piston. What is claimed .is:

Referring now in detail to the drawing, Figs. 1 A contact making device comprising a fluid and 2 show a key of this invention which is chamber, a membrane enclosing aportion of said similar to an ordinary smoking pipe and comchamber and responsive to pressure within said 45 prises a mouth piece I and stem 2 having an air chamber, a stem having fluid communication passage 3, which is in fluid communication with with said chamber, the diameter of said chamber a bowl 4 having an air chamber 5 over which is being considerably greater than that of said stretched a thin flexible membrane or diaphragm stem, and contact means adjacent said mem- B, and preferably consists of any suitable matebrane and adapted to be engaged thereby when 50 rial, such a balloon rubber, leather or the like. pressure is applied to said stem.

Membrane 6 is secured in place by a thin clamp ring 6a. Contact 8 is cemented to membrane MURRAY G. CROSBY.

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