constructed impedance coil which permits of connecting the telegraph instruments at station seven to the line through an additional impedance coil marked XO and a condenser marked C. At the central office we have the repeating coil specially constructed for this class of service, together with a condenser connected as shown on the diagram. This repeating coil is marked R. We further have an additional impedance coil marked I, another condenser marked C' and a tele graph relay and equipment marked 8. With all apparatus connected as shown and constructed in accordance with suggestions offered above, this service should prove a very satisfactory one. It is suggested that you communicate with one of our advertisers who will un doubtedly be able to furnish you with the required apparatus to equip your line as indicated should cost approximately thirty dollars exclusive of the telegraph apparatus. It may be mentioned that the telegraph relay which must be used should have a resistance of at least 150 ohms. RECENT TELEPHONE PATENTS 764,139. Telephone. John W. Mead, Harry A. Mackie and Martin Van Buren of Amsterdam, N. Y., assign One claim reads: In a telephone, the combination with a talking-circuit, a receiver, and a movable support for the receiver, of a subscriber's signaling-circuit containing a switch, one member of which is carried by the receiver-support whereby said circuit is controlled by the movements of said support, an induction-coil independent of the talking-circuit having its primary included in said signaling-circuit and its secondary connected with the main line, and an automatic make-and-break device independent of said switch arranged in the primary circuit of said coil substantially as set forth. (See cut.) 765.498. Change Speed Gear. Walter L. Marr of Detroit, Michigan. Application filed Aug. 3, 1903. The combination of a driving part having a gear-wheel with exterior teeth fixed thereon, a driven part having a gear-wheel with exterior teeth fixed thereon, said gearwheels being of different diameter, a member adapted to rotate around the axes of said gear-wheels, planetary gear-wheels pivoted upon an arbor in said member, and meshing with the gear-wheels upon the driving and driven parts, means for limiting the motion of said member, a second gear-wheel upon said driving part, a rack upon the driven part, a member The list of patents for our patent digest is obtained through the offices of Arthur F. Durand, patent lawyer and solicitor of patents, 1430 Monadnock Bldg., Chicago. combination with a front wall, of a dia- 765,488. Telephone Transmitter. William Kaisling of Chicago, assignor to Stromberg-Carlson Telephone Manu No. 765,461. bell and a serially-connected condenser connected between said line conductor and said return-path, a rheotome signal-bell in a circuit of high impedance connected between said line conductor and said returnpath, and means located at the central station adapted to connect the terminals of a source of alternating current or the terminals of a source of direct current between said line conductor and said returnpath. (See cut.) 764.055. Telephone Transmitter. Douglas C. Jackson of Madison, Wis. Application filed Sept. 26, 1902. One of the inventors claims is as follows: In a telephone-transmitter, the facturing Company of Rochester, N. Y. Application filed April 17, 1903. The inventor claims: In a telephonetransmitter, the combination with a circular front plate 15, of a flange 18 thereon, a bridge fitting concentrically within said flange, slots 22 in said flange, notches 21 leading to said slots, and flange-headed screws on said bridge registering with said notches to permit the assembly of the bridge and said front plate. In a telephone-transmitter, the combination with a circular front plate 15, of a flange 18 there on, a bridge fitting concentrically within said flange, slots 22 in said flange notches 21 leading to said slots, screws on said bridge and extensions pin from a normal to an alternative position, a second contact-arm with which the aforesaid contact-arm is brought into line when thus actuated, electromagnetic mechanism for effecting the actuation of said second contact-arm to make contact with the aforesaid arm, a signaling-circuit of which said contact-arms are terminals, and a signaling device and a source of current included in the said circuit at the same signaling-station with the ratchet-wheel, substantially as described. (See cut.) 765,064. Telephone Desk Set. Peter C. Burns of Chicago, Ill., assignor to the American Electric Telephone Company of Chicago. Application filed March 2, 1903. One claim reads: A telephone desk set comprising a suitable base, a tubular standard having its lower end removably engaging said base, a core or mounting-strip provided with a downwardly-extending portion having a bore through which the head of said screw is accessible. (See cut.) 763,971. Ringer System for Telephone Exchanges. Thomas C. Drake of Malta, Ohio. Application filed April 14, 1903. One claim follows: In a telephone system, the combination of a line, a relay bridged with the line and a high-resistance call-bell bridged with the line and in mul 2 ام No. 765,064. extending vertically within said standard, said core or mounting-strip being provided at its upper end with a shoulder resting on the upper end of the tubular standard, a screw extending upwardly through the base and engaging the lower end of the core or mounting-strip, so as to clamp the base and standard and core tightly together, and a pin inserted transversely through said screw to prevent it from dropping out when the core is removed from the standard, said base being No. 763,971. tiple with the relay, and a source of suitable current to actuate the relay in series with a source of suitable current to actuate the high-resistance call-bell, and means to connect the two sources of current in multiple with the call-bell and relay in the act of energizing the relay and call-bell simultaneously, substantially as described. (See cut.) 763,970. Party-Line Telephone System. Thomas C. Drake of Malta, Ohio. Application filed Feb. 13, 1903. In a party-line system the combination with a line-circuit of two oppositely-biased call-bells connected with the line in their operative condition, an alternating current connected with the line to selectively ring the bells, the alternating current having the positive alternation or half-wave of suitable strength to operate one of the bell's armatures against the biasing force exerted on said armature, and the negative alternation of half-wave of suitable strength to assist the biasing force in the return stroke of the bell's armature but not of sufficient strength to operate the oppositely-biased bell's armature, and means to reverse the polarity of the major and minor alternations of half-waves in the act of selectively ringing the other biased bell, substantially as described. 765,142. Telephony. Isidor Kitsee of Philadelphia, Pa. Application filed Aug. 27, 1903. The inventor claims: In a telephoneswitchboard, line-terminals, plugs for the terminals, movable contacts having portions adjacent each of said plugs and adapted to be connected with any one of said plugs, and means for preventing all but a single plug from engaging one of said contacts not in use. Whist by Telephone. "Did you ever try to play cards by telephone?" queried the telephone man, according to the Chicago Inter Ocean. "Never? Well, I have been experimenting with it, and, despite the fact that it has some drawbacks, it is highly interesting, and ought to become a fad. "My wife and I planned to go visiting a few nights ago, but an evening of rain spoiled our preparations. That was where I got busy, and after making a few preliminary plans I decided that we ought to be able to have a visit by telephone, even to including the playing of whist. "I have a desk telephone in our diningroom, and so I soon had a table arranged and brought out a deck of cards. Then I called up my friend by telephone, and he at once fell in with the plan. He got out a deck of cards and a table, and then I dealt our deck face upwards, calling out the cards that I dealt to each, having first provided imaginary seats for my friend and his wife. As I called out the cards to him he picked these cards out and dealt them to correspond on his own table. Of course, we were under the disadvantage of knowing what cards. every player held, but the novelty of making each move by telephone made this a minor matter. We would play our cards to turn, always announcing the card we played, and in this way the game went on as if we were sitting opposite each other on one table, instead of being about three miles apart and playing by wire. I don't think you could play poker in that way, however." The United States Telephone Company supplies the weather forecast to 119 exchanges located in 46 counties in Ohio. The forecasts are distributed to about 400,000 farmers daily. The St. Louis, St. Charles & Western Railroad is the first western road to adopt the use of telephones as a convenience to passengers on its trains. In each car will be installed a telephone connected by means of a patent trolley wheel with a wire above the car leading to the St. Louis exchange. |