US894820A - Telegraphy. - Google Patents

Description

No. 894,820. PATENTED AUG. 4, 1908.

- P. B. DELANY.

TELEGRAPHY.

APPLICATION FILED MAY 23, 1907.

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,4 i 53 l 5 Fa "Att t: I a E J. I M by PATENTED 'AUG. 4, 1908.

. P. B. DELA NY.

TELEGRAPHY. APPLICATION FILED MAY 23, 1 907.

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P. B. DELANY.

TELEGRAPHY. APPLICATION FILED nu 2a, 1907.

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PATRICK B. DELANY, OF SOUTH ORANGE, NEW JERSEY.

TE LE GR APHY Specification of Letters Patent.

Patented Aug. 4, 1908.

Application filed May 23, 1907. Serial No. 375,199.

To all whom it may concern:

Be it known that I, PATRICK B. DELANY, a citizen of the United States, residing in South Orange, county of Essex, State of New Jersey, have invented certain new and useful Improvements in Telegraphy, of which the following is a specification.

This invention relates to a system of telegraphy in which a plurality of dots is transmitted as a single impulse of a length corresponding to the number of dots it represents, and which at the receiver is disintegrated into the component dot signals. Such a system is disclosed in applications heretofore filed by me. In those applications areshown local electro-magnets interactingly controlled to effect disintegration of a received solid im pulse of current into the dot signals it represents. Such local magnets, one controlling the circuit of another, effectively carry out the system referred to, which may of course be practiced in other ways.

The present invention deals with special apparatus and arrangements thereof to disintegrate solid impulses into their component short signals, that experience has shown to be particularly simple and effective.

In place of the interacting electro-magnetic apparatus referred to, an electro-magnetic mechanical dot maker is employed, its function at the sending end being to guide the operator by converting into dots or short signa s, the long impulses representing a plurality of dots, and at the receiving end to perform the same functions under control of the relay for the delivery or transcription of the signal represented compositively by a long transmitted impulse.

In the accompanying drawings: Figure 1; shows the electro-magnetic mechanical dot maker as applied to the system of secret'telegraphy over a single wire at the sending and receiving station and controlled by polarized relays; Fig. 2, shows its application to secret telegraphy over two wires and controlled by neutral relays; Fig. 3, shows it as applied to secret working according to the system used on cables.

Referring to Fig. 1, when key K at station A is pressed against contact 0, one pole of the split battery I) is connected to line L through wire w, polarized relay P, wire w, polarized relay P, main line L to polarized relays P, P and wire 10 to earth at station B. The effect of this impulse on polar relays P, P is to hold their armature' levers against stops 8, s and at the same time the armature levers of relays P, P are moved to their stops 8, 8 When these latter armature levers leave stops 6, f, the normally closed local circuits of vibrators V, V are opened. These vibrators each consist of an electro-magnet c, an armature 0 carried by an arm if, supported by a spring blade '0 rigidly mounted in a fixed block 1). Above the armature the arm 12 is provided with an adjustable sliding weight a by means of which the rate of vibration of the part 12 41 may be regulated. Normally the magnet 12 attracts the armature lever, utting the spring supporting-blade o unc er tension and holding the armature lever against its front sto o. is releasec by the opening of the circuit of the magnet, the armature lever will make at each vibration contact with spring contact d, thereby closing and opening the circuits of the sounders S,-S making dots so long as the key K is held in closed position. When the lever K is pressed against contact 0 for a dash, the relays P, P are energized by current from the other pole of battery I) through wires h, 'L, w, the armature levers of relays P P being held firmly against their stops 6, f.. When the armatures of P P reach their stops 3', k, the sounders S, S are closed and remain so until lever K has been released and the relay armatures are returned to their stops 8, s by their springs p, q, similar to the action of the armatures of the relays P, P after'withdrawal of the current. In this way it will be seen that while the single impulsesre resenting dots and of a length correspon ing to the number of dots to be sounded or recorded are passing through the circuit, these impulses are being disintegrated or divided up into actual dots at both stations. This occurs with a degree of perfection unattainable by transmission of individual dots over the line. Furthermore, as the number of impulses sent over the line is reduced about thirty percent. and as those transmitted in most cases are of comparatively long duration, much longer circuits maybe worked and at much higher speeds.

Fig. 2, represents the electro-magnetic mechanical auto-dot maker as applied to se- When the armature lever line L and w to earth,

cret telegraphy employing two wires, one for l ber of dots the dots and the other for the dashes, neutral relays being employed. When key K is pushed to contact 0, the main battery I) is sent to the distant station via wire e0 relay R line L and relay R to earth or battery. This impulse actuates relays R R and when their armatures leave their back stops 6 and f the circuits of the magnets of the electro-magnetic mechanical vibrators VV are broken and the sounders S S operated as already described in connection with Fig. 1. When lever K is pressed to contact post 0 for a dash, the current from battery 6 goes to the distant station via wire to, relay R line L, relay R to earth or battery. The armatures of relays R R close the sounders circuits as already described.

Fig. 3, shows diagrammatically the electromagnetic mechanical automatic dot maker applied to cables or lines operated on the cable plan, using dot signals for dashes as well as dots, the polarity of the impulses determining their character. When key K is pressed down for a dot, one pole of battery is connected to earth through wire 20 key K lower contact bar it and wire w, leaving the other pole of the battery to line through wire of, upper contact bar and key K Simultaneously with the transmission of this impulse, the circuit of the automatic dot maker V is broken at the insulated contacts Z, Z, where it is normally closed via wire 10 local battery m, magnet of vibrator V and wire'w So long as key K is held down, the vibrator V will operate its sounder S so that if, for instance, four dots are to be transmitted, the operator holds the'key down until the sounder has sounded that number. Similarly when key K is pressed down, the circuit of automatic dot maker V is broken from its normally closed condition through insulated contacts a, n, wire to, circuit of magnet of vibrator V wire w, battery m, wires w and w. As in the case of auto matic dot maker V the vibrator of V is re leased and its sounder S actuated so long as key K is held down,thus notifying the operator when the requisite number of dots has been sent. The long impulses sent into the line may be received on relay P controlling vibrator V 4 and its sounder S. When the key K is pressed down for a time, representing one or more impulses, the polarized relay P will respond breaking the circuit of its vibrator V and producing dots on its sounder S. IVhen the dash key K is pressed down, polarized relay P is actuated, breaking the circuit of its vibrator V causing dots representing dashes to be made on its sounder S. In this way, the long impulses representing a plurality of dots or dashes, are converted into their component parts or signals corresponding with the num made at the transmitting station by the vibrators V V The sounders S, S may if desired, repeat into another circuit. The sounders S", S should have different tones, if the operator is receiving by sound, so that he may readily distinguish between the short signals that represent dots and the short signals that represent dashes.

Of course usual switches for connecting the apparatus for transmission or reception are to be provided. Such a switch is shown at X in Fig. 2.

I claim:

1. In telegraphy a transmitter having an elastic vibrator, a magnet normally maint'aining the vibrator at rest under tension, a normally closed local circuit for said magnet, a signal manifesting instrument, its local circuit and contacts by which its circuit is controlled regularly by the vibrator when the latter is in operation, a key and transmitting source of electric energy and circuit connections and contacts whereby when the key is closed the vibrator magnet is decnergized and the vibrator released to vibrate at its regular normal rate and a continuous current sent to line, combined with a distant receiver having a like vibrator, normally energized magnet maintaining it under tension, a signal manifesting instrument controlled by the vibrator and a relay energized by said transmitted impulse and acting to open the normally closed circuit of the vibrator.

2. In telegraphy a transmitter comprising a key and transmitting source of electric en ergy an elastic vibrator normally maintained under tension and means whereby when the key is closed to the source of electric energy said vibrator is released to vibrate at its normal rate and a continuous signal impulse is transmitted, combined with a receiver having a relay actuated by said impulse and a like vibrator normally maintained under tension and released when the relay is actuated.

3. In telegraphy a transmitting key or member, a polarized relay and its source of energy controlled by said member, an automatic dot maker, its controlling electro magnet; and circuit connections whereby the circuit of the dot maker magnet is established while the armature lever of the polarized relay is in open position and broken when said. lever starts to its closed position.

4. In telegraphy, a transmitter having a dot contact and a dash contact, electro-magnetic means controlled by said transmitter and its dot contact for holding inoperative against its normal retractile tension a circuit controlling vibrator, a main line, an electromagnet in said main line at the receiving end, a source of electric energy controlled by said transmitter for actuating said electro magnet, means controlled by said electro-magnet for holding inoperative against its normal retractile tension a circuit controlling vibrator, means controlled by said transmitter and said electro magnet for simultaneously putting into vibration the said two vibrators and means controlled by the vibrators to automatically produce corresponding short or dot signals at the sending and receiving ends of the main line.

In testimony whereof, I have hereunto Witnesses:

JOHN M. LEE, L. F. BROWNING.

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