US240335A - Edwin pope - Google Patents

Description

(Model.)

n E. POPE. Telephonie Signaling Apparatus. No. 240,335.` y PatentedApril 19,1881.

n4 PETERS, FHOTGUTRQGRAPHER. WASHINGTON. D C.

UNITED STATES PATENT OEEICE.

EDI/NIN POPE, OF QUEBEC, CANADA.

TELEPHONE SIGNALING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 240,335, dated April 19, 1881.

Application led April 19, 1880. (Model.)

To all whom 'it may concern Beit known that I, EDWIN POPE, of the city of Quebec, in the county and Province of Quebec, Canada, have invented certain new and useful improved mechanism for calling and telegraphing to and from individual stations on any telephonie or telegraphic circuit; and I do hereby declare that the following is afull, clear, and exact description ofthe same.

The special object of my invention is to do away with the inconvenience at present existing on telephonie circuits in which, when one station is to be notified, the bells or nlls of all the others on that circuit are sounee. but it may also be used with great advantage on any telegraphic line, the particular bene'tit being that by using my mechanism any communication between two stations is strictly private, and not capable of being intercepted at any other station on the line. It may be briefly described as consisting of a compound wheel released by the operator and revolving in unison with the wheels at other stations, so as (at a different point in its circumference for each station in the circuit) to operate the striker, and immediately afterward, through a special lever operated by the armature, to cut in 7 the telephone or other instrument, which remains in circuit until a current is sent over the line. The wheel in its revol ntion announces automatically at the controlling-cnice the number or other distinguishing-mark ot' its station.

The above arrangement is slightly modified where a long length of line is to be telegraphed over; but for full comprehension of the invention reference must be had to the annexed drawings, in which- Figure 1 isa plan of way-station apparatus with the parts in their norma-l position. Fig. 2 is a plan showing position of parts when the telephone is placed in circuit. Fiv. 3 is a detail ofthe wheel Fig. 4t, a plan of controllingoice apparatus, and Fig. 5, a plan of appara tus for a Morse circuit over long lines.

Similarl letters ofreference indicate like parts.

M M are electro-magnets, of any usual conf struction, and A the arma-ture, to which is atto :"lied, near its pivot-point a, a spring-rod, B, carrying the striker or hammer B, B2 being the bell, and B3 the knob and pin by which hammer is operated.

K is a key, arranged as shown with relation to the wheel W, presently to be described, pivoted at 7c to the case inclosing appara-tus, and having one end weighted, as shown at K', and the other provided with a pin, K2, against which 'presses the spring S, constructed preferably as shown, and connected to the line. The arm K3 presses against the rabbeted end of the hammer-B, and holds the key in the position shown in Fig. 1. This wheel IV and the wheel X are mounted on the same spindle, the former being made, as shown, ot' somewhat greater diameter than the latter, so as to leave a space between X and the raised rim or periphery ot' WV, in which are cut obliquely two openings,

(marked, respectively, I and O.) O is a stop inthe space between the wheels, and X a deep indentin the perilihery ofthe wheel X, the side ot' this, the stop O', and the edge or' the opening O being in one continuous line. The periphery of X is, as shown,formed with ratchet.- teeth between the openings O and I. The position of the opening I is varied on the wheel of each station.

W and WW are pins or projections on the outside of the periphery of W, against one ot' which, according as a current is on or not, presses the pin A on the armature to hold the wheel still.

Y and Y are projections from the periphery of IV, which, as the wheel revolves, come in contact with a projection, S', on the spring S, breaking the contact between the spring and key K, and thus interrupting the circuit. rPhe position of the pin Y is altered in each wheel to correspond with the opening I. Z Z are similar projections acting in the same way, but differing in number and arrangement at each station, so as to form a distinguishing letter or s'ignal.

A2 is an arm or projection from the armature A, which engages with and moves positively in either direction a cut-oft' lever, O, this being thereby alternately brought in contact with and removed from an adjustable screw, T, connected with the line and the telephone or other instrument, (shown at E, Fig. l.) Electrical connection is made through the IOO to interfere with the working ot' the magnet, and at the same time strengthen the stroke of the bell and make the working of the lever C more certain and operative.

The above are the devices comprised in the apparatus for any way-station in the circuit. The corresponding arrangement of the apparatus at the controlling-ottico will now be described. In this case (see Fig. 4) V is the disk or flat wheel, perforated, as shown, at c o, U being the pin to be inserted into either of these, and U' a iixed pin, which always puts the line to the ground. V' and V2 are pins corresponding exactly to the pins WT' and W2 on the wheel IV, and the several apertures o c are at the same distances from these pins as the openings I in the wheels at the several stations from the pins WV and W2, so as to make the interruption to the currentsynchronous. These interruptions are made by placing the pin U in the aperture corresponding to the opening in the wheel ot' the station to bc called.

The operation of my invention is follows: When at any way-station in the circuit itis desired to communicate with the controllingoflice the knob B3 is pressed in, bringing` the hammer B in contact with the bell B2, thus releasing the arm K3, and allowing the weighted end K2 of the key to bring its upper part and with it the spring S in close proximity with the periphery of the wheel \V. By this means the pin Y' comes in contact with the projection S' on the spring S, disengaging this latter from the pin K2 on the key, and the current is thereby momentarily interrupted, thus allowing the whole train ofwheels, one at each station, to revolve in unison (by means ot clockwork or other suitable mechanism) until the pin A' on the armature ot' the calling-station comes opposite the opening I in its wheel, when, as the current is again interrupted by the projection Y coming in contact with the projection S', as before, the armature drops, so as tojallow the pin A' to drop through the opening I upon the ratchet-teeth ot' the wheel X, which, as the wheel revolves, give vibratory motion to the armature A and rod B' and sound the call, the projections Z Z causing momentary interrupt-ions to the current, and thus indicating to the central office by their number and grouping which oiiice is calling. The interruptions are received on a relay, bell, sounder, or register in the usual way. Al though, as before mentioned, all thewheels ot' a circuit revolve in unison, no effect is produced by such revolution unless the key K has been dropped and the spring S has been brought in contact With the wheel, which only happens at the calling-station. It will be easily seen that although the wheels revolve in unison at each station the alarm is sounded but by one, and that only that one will be put in circuit, as will be presently explained.

On the wheel IV may be placed an addition al escapement-pin, to prevent the sounding of false calls by interruptions to the current caused by accidents to the line or batteries.

Where a call is given the armature is dropped to release the escapelnent and immediately raised again, passing over such extra pin 5 but if dropped by an accidental interruption to the line the armature remains down and checks the wheel.

On arriving at the end of the ratchet-teeth the armature, either by the spring attached thereto or by its own gravity, falls lower, the pin A' thereon dropping into the indent X', the pin A2, as it does so, coming against the lower part of the lever G and separating it from contact with the turn-screw T, thus cutting in or placing in circuit the telephone or telegraphic instrument. The wheel still revolving carries the pin A' from the indent X', along the stop O', and out through the opening O till it comes in contact with and is stopped by the pin W', the armature in this position, however, not acting upon the lever C to bring it into contact with the screwl until a current is let in, when the armature is brought upto the position shown in Fig. l, the wheel then revolving till the pin 72, striking against that A', stops and holds it. The key K is also, by the same movement, restored to the position shown in Fig. l by a pin on the wheel XV, with the upper face ot' the key coming in contact. When the wheel is in the position shown the dropping of the key K has no effect, as it does not interrupt the current, contact being still made between the key and the spring S by reason ot' there being no pin at that point on the wheel W to raise the spring S and break the circuit.

To call any way-station from the connecting-office all that is needed is to place the pin U in that perforation u of the disk V which corresponds in situation to the opening I ot" IOC the station to be called, and then to release the wheel by a momentaryinterruption ot' the battery-current. The wheels then revolve, and the current is again interrupted by the movable pin U, and the action goes on as described.

It will, of course, be understood from the foregoing that as the perforations n o in the disk V at the central or connecting station correspond with the openings I in the periphcries of the wheels ot' the several way-stations, when the current is interrupted by the movable pin U, placed in any one of such perforations, the armature at the station in which the gap l corresponds with such pert'orations drops through the armatures ofthe other stations, then resting on the peripheries of the several wheels, and being' drawn up again by the magnets as the current is immediately reestablished.

Over lon g lines and for a Morse circuit, although the signaling apparatus is the same,

the arrangement of the other parts will require to be varied, preferably in some such way as that shown in Fig. 5, one current heilig used for signaling purposes and the other for transmitting messages, and a polarized relay, P It, arranged to work the magnets M with a local battery. When the line is not in use a IIO current-say positiveis put on, which causes the polarized relay to close its local circuit,

tS, as before described. The controlling oice receives this letter or number on an ordinary relay, and putting in the pin for that ofce reverses the current for a movement, which starts all the wheels, and then checks them again at the point W by putting on the negative current and keeping it on until the business is transacted. Where an interruption of the current is made by the controlling ofice in the direct-working plan a reversal of current is made in this.

An indicator may, if' desired, be used at each station to show that a call has been given, and lthe apparatus is in every case inclosed to prevent interference therewith.

What I claim is as follows:

l. In a telegraphic switch and alarm, an armature in its normal position held up by magnets, and when released at a certain point by the interruption of current to said magnets dropping through the periphery of a revolving Wheel or disk into a lower position, whence it is automatically restored to its normal position by the revolution of the disk or wheel, all substantially as herein set forth, and for the purposes described.

2. In a telephone signal-switch, the combination, for cutting an instrument in and out of circuit, of the pivoted lever U, brought in contact with and detached from stop 'I by magnet M and wheels W and X acting upon and through the armature A.

3. The combina-tion of the lever C, magnet M, armature A, and double wheel, with openings in outer rim and indent in inner disk, all as herein set forth, and for the purposes described.

4. The combined wheels W and X,with fixed opening O and varied opening I in periphery ot' former, and ratchet-teeth and indent on latter, all as and for the purposes set forth.

5. The combination ot' the wheel W, with projections on periphery of same, key K, and spring S, all constructed and operating substantially as set forth.

6. The combination f the Wheel W, key K, spring S, and hammer B, as and for the purposes herein described.

7 The disk V, with perforations corresponding to openings I in the wheels W of the several stations in any circuit, and movable pin for interrupting or changing the current, all as herein set forth.

EDWIN POPE.

Wi tncsses J AMES BARCLAY, Trios. SIMPSON.

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