USRE10989E - Telephone-exchange - Google Patents

Description

W. B. VANSIZE.

TELEPHONE EXCHANGE.

Reissued Mar. 5, 1889.

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' UNITED STATES PATENT OFFICE.

y WILLIAM VANSlZE, OF PLAINFIELD, NEW'JERS EY IELEPHONE-EXCHANG E.

SPECIFICATION forming part of ReissuodLetters Patent No. 10,989, dated March 5, 1889.

Original No, 393,529, dated November 27, 1888. Application for reissue filed January 22, 1889. Serial No. 297,221.

lb all whomit may conccl'ufln Be it known that l. \VILLTAH l YANSIZE, a citizen of the l 'uitod Slales, and a resident of Plainlield, in the'county of Union and State of New Jersey, have invented certainv new and useful. lm n'oi'ements in 'lelephonc-E-xchanges, of which thet'ollowiug a specification. Y

My inventiol'l is an improvement in telephone-exchanges.

The object of my invention is to simplify the apparatus required,to reduce the amount and the cost of apparatus, and to provide a simple, efficient, and expeditious means for determining whether a walled-for lincuis in use ornot.

I have chosen to describe and illustrate my improvements as applied to a multiple-beam arrangement of central-station apparatus.

In my arrangement at the-central station all the sub-station wires are normally open. 'lhere'is the usual arrangement of duplicate boards, upon each and every one of which each and every sub-station line has a springjack connection. *I call this the aggregate number of circuits, and I denominate the subdivision of this number of circuits assigned to an individual operator a group. It has been customary to place anannu nciator in each circuit of a groupand to drop this annunciator and wait for the operator to insert a telephone and respond whenever it was desired to communicate. A second arrangement has been used, known as the Law system, in which the annunciators were dispens'ed with and a call-wire-used, the callwire being common toa series of sub-stations. Both plans noted have some objectionable features, and require supplemental devices to determine the question whether or not 8. called for line is in use.

My improvement consists in placing a series of fixed insulated contact-points equal in number to the number of circuits in a group in close proximity to each board. These points I prefer to arrange in a clircle, and at the center I place arotating radial arm. This arm is upon a constantly rotating shaft, which also bears a wheel having a series of teeth, one for each contact-point. I connect .or catch taking into the toothed wheel.

thisarm to ground through a fragment of conductor containing an clect-ro-magnet and a head telephone. Each fixed contact point forms the normally-open terminal of .one circuit of a group, and the radial arm in its crotation completes thecireuits of each substation line in succession through the magnet and telephonc at the central station. This magnet has an armature-bar bearing a boil: 1, each sub-station is' a battery and a switch for including it in the-line. If this battery be included in circuit at a sub-station, the instant the radial arm at the central station in the course of its rotation makes contact with the contact forming the terminal of that particular line, the elcctro-magnc't will be operated, and its armaturebar will catch and hold the rotating arm in that position until released. the circuit will be announced at the sub-station by a click in the telephone, hearing which the sub-station instantly knows that he is in communication with the central connecting two circuits disconnects both. front their normal terminal contacts. Having determined the question of line in use or not,

the operator again returnsthe head telephone to its normal position in'connectiou with the radial arm. Assuming that the ca-ll'edfor line was found idle, the operatortakes up two jack-plugs united by a flexible cord, includinga ring-off annunciator, and inserts them in the jacks of the calling and called-for line, respectively. The insertion of the plug opens both lines in the jacks and cuts off connection with the rotating radial 'arms,when in every case, the arm of the calling line having been The operation of thus completing stopped, it immediately resumes its rotary movement and' thus continues until again stopped.

The accompanying d rawiug illustrates my invention.

C C are two duplicate switch-boards locatet'l at the central station and connecting withsubstations S S, &c., through the medium of a series of electrical conductors, 2 3, &c., the circuit of each of which may be completed by the earth or return-conductor. Each conductor has a spring-jaek, 7', on each board C,

&c. A subdivision of the aggregate number of circuits terminates in a series of fixed con tact-points, c 0, located in close proximity to each board. These points are preferably arranged in the circumference of a circular section of insulating material, M,- At the center of M is placed a radial arm of conducting material, A, having a flexible terminal or trailer, f, in posit-ion to make contact periodically and successivelywith the series of contact points 1'. Fixed to the same shaft or arbor with armA is a toothed wheel, or. The tect-hin the wheel and the contacts c in the circumferenceof the circle are equal in su her and correspond in radial position. The arm A and wheel w are motor-driven, the movement being equalized and regulated by power-driven intermediate wheels, w w", in a well-known manner.- A fragment of cone ductor-tO 41 connects thisradial arm A with the earth. Included in the fragment 4O 41- is a special spring-jack, J, and an elect-roe magnet, m. This magnet m has a hookedarmature-har, the said hoolc being in position toengage with any toothof wheel w when-; ever the magnet is energized by an electricalcurrent. A head telephone, H, and a suite ble transmitter, 7i,'have their terminals 0on nectedto a jack-plug, P, and may be includedin the fragment of conductor 4041 by inserting plug P in jack J; or plug P may he inserted in any of the series of jacks-j for the purpose'ot including head telephone H-in any circuit] to 6. Flexible cords (l d are connected to terminal spring-jack plugs p p through ring-off annunciators n. The cords are held in the position shown by a pulleyweight, or, called a gravity take-up.

At the sub-stations S S there is the usual arrangement of gravity-switch, G, receivinglclephone T, and transmittcrt in a telephone branch, and the call-bell B in the hell-branch. In place of a magneto-hell I use a constant current generator, as one or two cells of battery b, and a hand-switch, a, for including or exclliding it with respect to the mainline. \Vhen switch a is in its normal position, cireuit is via the conductor 20, (1,19, and 17. When lever u is depwssci'l, circuit is m 20, a 1-8, b, and.

The operation is as follows: \Ve will assume the entire apparatus to be in the position shown and that, 'arms A are constantly rotating in the direction shown-by the arrow. Station 8 desires to communicate with a dis-7.,

near board taut station, S. Station .5 depresses arm ii,

circuitpa'ssin 'l'ia elements 17,1), 18, a, 20, bell B G, line jacks j j on G ('7', and terminates in the open contact-point c on disk M,

Circuit is open, but immediately arm A in' its rotation strikes contact .0 of line-wire I, circuit is completed via f, A, 40, J, P, 4243, including Ii and h, magnet -m,and conductor i] to earth. The magnet m is energized and attracts its armature, bringing the hooked armature-bar e into engagement with wheel ur, which instantly stops, 1'' remaining in contact with line I. Sub-station Shears a stroke on bell B, which he understands to be the completion of his circuit, and he knows that he has the exclusive attention of the central-station operator. If the sub-station has removed his telephone, he hears the stroke or click in his telephone instead of on the bell. In either case'he immediately announces the number of his own station and that of the station with which communication is desired,

soundis heard, it is an indication that the called-for line isseverrd atsoine poin t outsi-de the terminal 0, which would be the case ita jack-plug had been inserted in anyjaek j in saidcircuit 6. Assuming that the circuit wasnot in use, the operator inserts plugs p p into the circuit of the calling andthe called-for s'tati'ons, respectively, thus joining said two circuits into one, cutting oif connection with the contact-pointsc 'c, and includ ing a-ri-ng-oiE- annunciator in the connected circuit. The subas'ta-t-ion releases the switch- .arm and thchattery' is withdrawn. The-arm A of the calling-station group has been released and the central-station operator returns the head telephone H to the line fragment i0 41, ready to receivethe next call.

\Vhat I claim, and desire to secure by Let.- ters Patent, is-

l. The combinal ion, in a telephone-cxchange, of a central station and a series of sub-stations, a series of electrical conductors uniting said central station and sub-stations, telephonic instruments at each station for the purpose of intercomniun ion! ion, switching apparatus at the central station for connecting said conductors in pairs, and an automatic switch at the central station making and breaking connection with each of said conductors periodically.

2. The combination of a ventral slut ion and a series of sub-stations, a series of electrical conductors uniting the substations with the central "station a switch-inward at the central station containing a series of spring-jacks, one for, eaiclrof said conductors, a series of flexible conducting cords and plugs for electrically uniting the spring-jacksjn pairs, a series of circumferentially-arranged fixed contactpoints, each forming the terminal of one of said conductors, and a rotating radial arm forming the terminal of a fragment of conductor containing a receiving-telephone, said arm forming contact with each of said fixed contacts successively.

The combination of a central station and a series of sub-stations, a series of electrical conductors uniting said sub-stations with said central station, a switch-boardat the central station containinga series of spring-jacks,

one for each of said conductors, a series of flexible conducting cords and plugs for electrically uniting the spring-jacks in pairs, a series of fixed contact-points, each forming the terminal of one of said conductors, a movable contact-point forming the terminal of a fragment'of conductor, a receiving-telephone located in said conductor fragment, and means for impartinga progressive movement to said contact-point, whereby the said movable contact point is carried into connection with each of said fixed contact-points periodically and successively.

4. The combination of a central stat-ion and a series of sub-stations, a series of electrical c'ondnetorsuniting said sub-stations with said central station, a switch-board at the central station containing. a series of spring-jacks, one for each of said conductors, a series of flexible conducting cords and plugs for electrically uniting the spring-jacks in pairs, a

series of circumferentially-arranged fixed contact-points, each forming the terminal of one of said conductors, a rotating radial arm located'upon a suitable bearing, a toothed wheel fixed to said arm and rotating therewith, a fragment of conductor connected to I said arm, an electro-magnet having its coils included in said fragment of conductor, a hooked armature-bar therefor to catch and hold the-arm and wheel, and a receiving-tele phone located in saidfragme'nt of conductor,

all arranged-andoperating substantially as described.

5. The combination of a central station and a seriesof sub-stations, a series of electrical conductors uniting said sub-stations with said central station, two or more duplicate switchboards at the central station, upon each 'of which each of said conductors has an electrical connection, suitable switching devices at each board, for uniting the conductors in pairs, and in close proximity to each board a separate subdivision or group of said con-p doctors connected to a series of fixed contactpoints, a movable contact forming the terminalof a fragment of conductor eontaining'a receiving-telephone, and meansfor imparting a progressive movement to said movable contact, whereby the said movable contact is carried into connection with each of said fixed contacts periodically and successively.

WILLIAM B. VANS-IZE.

Witn

V. C. SCI-IAUMBURG, F. D. L. WALKER.

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