PERFECTIONNEMENTS DANS LES TELEPHONIE

IMPROVEMENTS IN TELEPHONY

Revendications

Claim lst A resistance medium B of such material and construction that it will offer high resistance to the galvanic current and comparatively little resistance to the secondary or induced current. 2nd A self-acting shunting switch formed by the mouth piece K, hinged to the telephone A and connected to the galvanic circuit, in such a manner that,immediately the operator ceases to use the telephone, the galvanic circuit is automatically closed. 3rd In combination with the high resistance medium, a shunting switch 11 pivoted between two contact points S T and arranged in con¬nection with a telephone, for the purpose of enabling the operator to ground the telephone at pleasure, without interfering with the action of the galvanic current used in the same line. 4th In telephony, a glass tube a filled with glycerine and water, or other suitable liquid, and provided with air tight fitting caps b b connected with platinum points d d, forming a high resistance medium, capable of offering high resistance to the galvanic current, and comparatively little resistance to the induced current applied as specified. 5th In telephony, a graphite pencil having a section g of the wood or graphite cut away, as described, and provided with wires b2 b2 suitably connected to the terminal ends of the graphite applied as specified. 6th.In telephony, a resistance medium of German silver, or other insulated wires, constructed and applied as specified. 7th In telephony, a resistance medium B located on the ground wire 11 of a branch line of any closed galvanic current, for the purpose of forming a secondary current circuit, without interfering with the action of the galvanic current. 8th In telephony, a resistance medium B connecting the wires of two independent closed gal¬vanic circuits, without interrupting the action of the galvanic currents.