USRE6872E - Improvement in printing-telegraph instruments - Google Patents

Description

a Shets-Sheet 1'.

E. GRAY. PRINTING-TELEGRAPH INSTRUMENT.

Reissued. Jan 25, 1876.

3 Sheets-Sheet 2.

GRAY. PRINTING-TELEGRAPH INSTRUMENT.

NO. 6.872. Reissued. Jan. 25,1876.

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i -$447M, .Jziya.

s She-ets-Sheet a.

E. GRAY. PRINTING-TELEGRAPH INSTRUMENT.

Reissued J'a'n. 25,1876.

- polarized relay, detached.

UNITED STATES ELISHA GRAY, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN PRINTING-TELEGRAPH INSTRUMENTS.

Specification forming part of Letters Patent No. 132,907,1iatedNovembcr 12, 1872; reissue No. 6.872. dated January 25, 1876; application filed December 2, 1875.

To all whom it may concern:

Be it known that I, ELISHA GRAY, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Printing-Telegraph Instruments, which are fully described in the following specification, reference being had to the accompanying drawing, in which- Figure 1, Sheet 1, represents a front elevation of a printing-telegraph instrume'nt'providefd with my improvements, the upper part of the polarized relay and cylindricafcase being broken away for the purpose of exhibiting the parts within the case. Fig. 2, Sheet 1, is a rear elevation of the same. Fig. 3, Sheet 1, is a front elevation of the upper part of the Fig. 4, Sheet 2, -is a bottom view of my improvedinstrument. Fig. 5, Sheet 2, is an enlarged view of the uni: son-stop detached. Figs. 6 and 7, Sheet 3, represent a plan viewor chart, more fully showing the connection between the difl'erent parts of the instrument, the relation of the instrument to the batteries, and of the primary to the secondary instruments along the line.

The object of my invention is to providea line of printing-telegraph instruments, cousistiug of one primary and one or more secondary instruments, charged alternately with positive and negative currents by a single main battery and a pole-changer, thus dispen sing with the use of a switch, and also of a main battery and a pole-changer, except at the stations where the primary instrument is located, the said pole-changer being under the control of the operator at any-station onthe line, and the instruments being automatic in action, with the exception of the ordinary manipulation of keys at the transmitting-station.

The invention herein claimed relates to a unison-stop and the combination therewith of several other devices, in connection with which it operates; also, to the peculiar combination of the unisonstop in the primary instrument with the unison-st0ps in the secondaryiustruments; and, also, to the construction of the unison-stop in the primary instrument.

The case of the instruments consists of two of the metallic pieces 'of the said magnet,and

DIVISION 0.

parts, a base, A, and an upright portion, B,

the latter being surmounted by a suitable faced with platinum foil, and united by the cross-piece E, against which strips-the mover b le ends of the springs D D rest.

F F are small insulated copper Wires, each of which communicates with one of the keys 0 O, and all of which, excepting F, unite and 'form the cable G, and then, separating, each wire of the cable communicates with one B, all of which pieces are attached to a disk, but are insulated from each other and from the disk to which they are-attached,- and constitute what is known as a"sun flower, while the sunflower, springdrag, wires F F, and corresponding keys constitute what'I call a sunflower system.

I is an electromngnet, wound with insulated copper wire, preferably N0. 23.

J is a lever, and K is a bracket, to which it is pivoted, as shown at l, Fig. 1.

M is asoft-iron armature, rigidly attached to an arm or lever projecting from the shouldeer or pivot of the lever J; and N is a coilspring, by which the lever J is drawn back when the circuit through the magnet I is open. When the circuit through the magnet I is closed the armature M is drawn to the poles the lever J vibrated as this circuit is opened and closed.

O is a frame, and P isthe press-lever, pivoted thereto, to which lever the printing-pad or roller and the feeding mechanism are attached.

The lever P is jointed to the lever J, in such a manner that the vibration of the latter operates the feeding mechanism, and throws the pad against the type-wheel.

Q is the type-wheel, rigidly attached to a shaft having hearings in the frame 0.-

R is a German-silver'spring, rigidly attached 1 projecting slightly above the periphery of the disk S.

U is an arm, pivoted to the frame 0, and extending to the central part of the diskS. The free end of this arm is perforated, and V is a headed steel pin, passing freely through the said perforatiomand projecting into the spiral groove on the disk S.

A platinum pin, A, is supported by the'arm U,.but is'insulated therefrom, and so arranged with reference to the disk S that when the lat: ter is rotated the pin T will be brought into contact with the pin.

. A small insulated copper wire,(not shown) connects the pin A" with the inside wire of the magnet B, herea ter mentioned.

Aforked arm, 0, is attached to the horizontal arm of the lever P, and, extending upward, its forked portion embraces the arm U, so that the upward. movement of the arm of le'ver P will cause the pin A to be lifted above the pin '1, and thereby break its contact therewith. To accommodate this movement, the point of the pin V is slightly rounded, and the spiralgroove in which it travels is slightly wedge-shaped, so that the pin V will yield sufliciently for the purpose.

D, is a softiron armature, located between the magnets B B and E is a pivoted lever, to which the armature is attached.

\ From the lever E converging arms F F extend, and terminate in verges for wedgeshaped projections, which alternately rest in V- shaped notches sunken in into the periphery of a disk, (not shown,) rigidly attached to the type-wheel shaft, so that the type-wheel will be internnttently revolved by the vibrations of the lever E, and one letter at'a time presented to the paper on which the messages are printed.

. B B are ordinary electro-magnets, the poles of which are arranged opposite the sides of the armatures D".

The pole-changer is constructed as follows: G is an insulator-bloek-attached to the lower end of the lever E. H I J are metallic blocks attached to the block G, so as to be insulated from each other. K 'isalso an insulator-block, and L M are German-silver springs attached thereto, so as to be insulated .from each other.

The free end of spring L rests alternately on the blocks H and I, and the spring M alternately on the blocks 1 and J, as the lever E vibrates.

N is a common wire communicating with the blocks H g and with one of the mainbattery.

O is a wire attached to the block I, and communicating with the other pole ofthe main battery.

Thespring M communicates with the keyboard, polarized relay, and the ground, and the spring L with the main line.

P P", Fig. 3, represent the polarized relaymagnet, the lower part of whichis shown in Fig. l, which may he itsposition on the instrument.

Q are semicircular pieces of soft iron attached to the poles of the'relay-magnet, and arranged with reference to each other, as shown in Sheet 3, thus dividing the magnetism, and making a double or forked pole.

R'-is a hardened and permanently -magnetized steel tongue or armature, pivoted so as (tg'vibrate between the end of the pieces I II S S are platinum-pointed screws, and T is a post projecting from the armature R, and provided with platinum points so arrangedas to alternately come in' contact with the points of the screws S S as the, armature R is'vibrated.

Having thus described the mechanical construction and operation of my improved,devices, and the parts operating in connection therewith, -I will now trace the electrical "cur7 rents through the instrument, and describeits operation thereon, two or more instruments acting together; first, the direction of the main current when the machines are at rest. V

In Figs. 6 and 7, Sheet 3, the main circuits are represented by full lil1es,,the type-wheel locals by dotted lines, and the printing-locals by broken lines.

Beginning at the primary instrument or station No. 1, the plus pole of the main battery enters theinstrument at binding-post No. 7; from thence it proceeds through a wire-directly to the piece 1 of the automatic polechanger; thence through spring M and its wire to the type-wheel shaft; thence through the spring R to that one of the pieces H in contact therewith, and through its wire to a key corresponding to such piece H; thence to the strips E E, and through key G and the polarized relay; and from thence out at bindingpost No. 8 to the ground.

At instrument or station No. 2, the plus current passes up the ground-wire to bindingpost No.11; thence to key 0; thence through strips E; thence through one of the keys 0, audits wire, to a corresponding piece, H; thence through the spring R, type-wheelshaft and its wire, to the polarized relay; thence to binding-post No.10, and over the line to station No. 1, entering the instrument there at hindingpost No. 9; from thence it passes through a wire to spring L of the pole-changer; from thence through the block J, which is connected by a wire to the block H, and through a wire to a Morse relay, which may be attached to the case A through the said and the operation ofing to the pins Morse relay and a wire to binding-post No. 6; and from thence to the negative or pole of the main battery;

The circuit of the type-wheel local battery of instrument No. 1, Fig. 6, is as follows: Entering at binding-post No. 12, it runs to the local magnets B B, where it branches and connects with the inner end of the coil of each of said magnets. The outer ends of said coils connect, respectively, with the platinum-pointed screws S S.

From one or the other of these screws the current passes to the armature R, according to the screw in contact therewith; from thence it passes to binding-screw No.13; from-thence to the type-wheel local battery.

The printing-circuit enters binding-post N o. 15, and passes on a wire directly to the armar ture-lever of the'Morse relay. When this armature-lever is resting on its back point, it connects with one end of the wire on-the local printin g-ma gnet I, so that when the Morse relay-(aircui t is open the printing-local circuit is through the said magnet I; from thence it passes.binding-screw N0. 14, and to the printing-local battery.

The local magnet BB is shunted when the pins T and A are in contact, as may be observed by tracing the broken lines on Sheet 3 relating to instrument No. 1.

The secondary instrumentat station No. 2, Fignfi, is in all respects like instrument No. 1, except that the former has no pole-changer norMorse relay, and the printing-local is brought into action in a difl'erent manner from that described.

The'disk corresponding to the disk Sis also difl'erently grooved, and the pins correspond- T and A have no electrical contact.

U, in instrument No. 2, Sheet 3, isa toothed wheel on the front end of the type-wheel sb'ai't. V is a rectangular lever, pivoted at its angle, and its upper end is provided with a wedge shaped point, corresponding to the' teeth or notches on the wheel U, withwhich it eugages.

W is a point in communication with the printingdocal battery, and the .lower' end of the lever V rests on the point W whenthe upper end rests in the said notches.

The revolutions of the wheel U vibrate the lever V, and break its contactwith the point W, and break the local printing-circuit, and

the vibration is so rapid that the point W is not in contact with the lever long enough to close the printing-local circuit until the ty.pe-- wheel stops for moment, .when the said circuitcloses and a letter is printed. line is not in operation the mannerdescri bed, with the exception of the local type-wheel circuit atinstrument No. l.

The purpose of thecon tact of the pinsT and A is to allow the circuit to pass around the magnet B. As the resistance of the circuit through the shunt is greatlyless than through.

ment would continue to the magnet, it follows that there is little or no magnetism developed in magnet B, and, as the main circuit is running through the polar-' ized relay-magnet in such a direction as to hold its tongue against the platinum point S, there is no magnetism in either B or B.

Suppose the operator at instrument No. .1 wishesto communicate witha distant station, he depresses the key 0', and thereby breaks the main circuit. By breakingthiscircuit the Morse relay-magnet, at instrument No. 1, is allowed to open, and it will, in turn, on its back stroke, close the printing-local and throw the printing roller or pad and the paper thereon against the type-wheel, so as to make an impression-of the letter then presented.

At the same time the arm U will be thrown up, and the pin 2: will rest on the periphery of the disk S. This operation will take the shunt from the magnet B, and the type-wheel local current acts on the said magnet, so that the armature-D is drawn to it.

This changes the relative position of the pole-changer blocks and the springs resting thereon, and as soon as the key 0 is released the current of the main battery through the polarized relays versed.

The armatu res ofthe polarized relays are now thrown against the opposite S, and the local circuits through the magnets B in all the instruments are thus closed, and the armatures D are This again reverses the main circuits, and the reverse action takes place.

It the arm U should remain up, the instruoperate so long as the batteries developed suflicient force. But the pin V follows the spiral groove in the disk S until the type-wheel instrument N0. 1 has made three revolutions, when the pins T and A are brought in contact.

The last stroke of the armature D,which brought the pins T and A in contact, left the springs L and M resting on the blocks I and J, and the armature R is thrown against the point S, which creates the usual action on all the type-wheel locals, except that of instrument No. 1, Magnet B being shunted by the contact of 'the points T and A, the contact of the armature R, with the point S, produces no efl'ect on the said magnet; consequently the armatures, both local and main, cease to act.

,As all the machines in the circuit are controlled by instrument No. 1, they all stop at the same time and on the same letter. The points .T and A, on all the instruments, except No. 1, engage with each other at two revolutions of the type-wheel, instead of three, and make no electrical contact, but simply lock the type-wheel when the proper letter is presented, and until the type-wheel of instrument No. 1 makes another revolution and stops at. the same letter.

By this means-all the type-wheels, if the should be disarrauged, are brought into um.-

and over the whole line is reimmediately drawn to them.-

finds the key corresponding to the next letter :After he has released the last key operated 'upon, the type-wheel of instrument No. l

4 i (new claim as new, and desire to secure by Letters Patent, is-

1. In a line of telegraph-printing instruments, the-combination of unison-stops in the primary and secondary instruments, the stops being constructed substantially as described, so that the type-wheel in the primary will be rotated longer than that in any secondary instrument, for the purposes set forth.

2. In a line of telegraph-printing instruments, the combination, substantially as described, of a unison-stop in the primary instrument, operating through a shunt, and a unisonstop in the secondary instruments, operating through a mechanical device, as and for the purposes set forth.

3.. The combination, substantially asdescribed, of a unison stop or stops, a polechanger, and a key or circuit-breakin g device at one or more points in the line, for the purposes set forth.

son, so as to act together. If the operator at either instrument now depresses key C, the printing-local of instrument No. 1 will be closed, and the shunt taken from magnet B.

In order to print a word or sentence the operator, before releasing the key 0, depresses the "key designated by the first-letter of the word or sentence,'and at the S'rtll'lfihll 1e releases the key 0'. The armature will now vibrate rapidly and carry forward the type-wheels until they reach the letter corresponding to the key which is still depressed.

When the point of the spring R, which moves with the type-wheel, reaches the piece H corresponding to the depressed key, it finds the main circuit open at that key consequently the vibration of the armatures R ceases and the type-wheel stops. its movement depending upon the vibration of said armature.

A letter on the type-wheel is now over the printin g-pad. All the printing-locals are now brought into action-that of instrument No. 1, because the armature of the Morse relay (A", Sheet 3, instrument No. 1) falls on its back point on account of the main circuit being open that of instrument N0. 2, because the type-wheel has stopped and allowed the lever V to rest on the point W. He now .ments, the combination, substantially as described, ,of the unison-stop lever, the forked arm 0", operated by the soft-iron armature, and a key or circuit-breaking device, as and for the purposes set forth.

5. The combination, substantially as described, of a unison-stop on the type-wheel shaft, a polarized armature to control the type-wheel, and a soft-iron armature to actuate the printing mechanism, as and for the purposes set. forth. 4

6. An electromechanical unison-stop and shunting device, the points or pins T and A of which are brought into electrical contact, substantially as and for the purposes set forth. 7. The combinati'ori, substantially as described, of the unison-stop lever, carrying a pin, V, and the press-lever, operated by the soft-iron. armature M during a pause in the to be printed, depresses this key, and releases the key corresponding to the first letter, and so continues until the message is printed.

makes three revolutions, and the line is then at rest.

It may be here stated that, as it requires three uninterrupted revolutionsof the typewheel to bring the shunting-points T and A in contact, and as a letter is printed at least as often as once in each revolution, the said points cannot come in contact during the operation of printing.

I make no claim to many parts of the mechanism which I have shown and described in order to explain the construction and operation of the instruments; and the specific construction of several of the devices which I claim to have combined in a novel manner is not of my invention.

Having thus described my invention, what I set forth.

8. The combination of the grooved 'disk S on the type-wheel shaft and the arm U, carrying the pin V, substantially as and for the purposes specified.

' ELISHA GRAY.

In presence of- Hnrnarcu F. Buuus, L; A. Brmrmo.

- 4. In a line of telegraph-printing instruaction of the pole-changer,for the purposes

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