USRE6871E - Improvement in printing-telegraph instruments - Google Patents

Description

SSheetsv-Sheet 1.'

E. GRAY. PRINTING-TELEGRAPH INSTRUMENT.

Reissued Jan. 25,'18'16."y

Jiness es:

No. 5,871. Re'ssued Jan. 25,1876..

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ELISBA GRAY, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN PRINTING-TELEGRAPH INSTRUMENTS.

Specification forming part of Letters Patent No. 132,907, dated November 12, 1872; reissue No. 46,871-, dated J annary 25, 1876; application lled December 2, 1875.

DIVISION B.

To all whom it may concern Be it known that I, ELISHAGRAY, of Ohicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvements in Printing-Telegraph Instruments, which are fully. described in the following specitication, reference being had to the accompanying drawings, in which- Figure 1, Sheet l, represents a front elevation ot' a printing-telegraph instrument provided with my improvements, the upper part of the polarized relay and cylindrical case being broken away for the purpose of exhibiting the parts within the case.

a rear elevation of the saine.

Fig. 2, Sheet 1, is Fig. 3, Sheet l, is a front elevation of the upper part of the polarizedrelay, detached. Fig. 4, Sheet 2, is a'bottom view ot' my improved instrument. Fig. 5, Sheet 2, is an enlarged view of the unison-stop, detached. Figs. 6 and'` 7, Sheet 3, represent a plan view orv chart, more fully showing the connection between the different parts of the instrument, the relation ot' the instrument to the batteries, and of the primaryV to thefseeondary instruinentsalong the line.

The object of my invention is to provide a Y line of printing-telegraph instruments consisting 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 dispensing with the 'use of a switch, and also of a main bat-` which it (io-operates, as will be hereinafter fully set forth.

The case of the. instruments consists of two parts, a base, A, and an upright portion, B, surmounted by a suitable brass cover. C C Aare keys, the former of -v ed copper wirepreterably ',tached.

which are designated by the letters 4t the alphabet and marks of punctuation. All are constructed ot' gutta-percha heads, having brass pins extending freely through the case. D D' are metallic platinum-pointed springs,

supporting the lower end ot' the pins projecting from the keys, and E E are metallic strips faced with platinum-foil, and united by; the

crosspiece E', against which strips the movable ends of the springs D D rest.

F F' are small insulated copper wires, caen of which communicates with one ol' the key's G C, and lall ot' which, excepting F', unite and form the cablev Gr, and then, separating, each wire ci' the cable communicates with `one of vthe metallic pieces H, all of which piecesare att-ached 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 sunflower]7 while the sunflower, spring drag, Wires F F', and corresponding keys constitute what I call a sunflower system.

I is an electronnagnet wound with insulat- No. 23. J is alever, and K is a bracket, to which it is pivoted, as shown at l, Fig. l. M is a soft-iron armature, rigidly attached to an arm or lever projecting from the shoulder or pivot ot' the lever J, and N isa coil-spring, by which the leverJ is drawn back whenth-e circuit through the magnet I is open.

When the circuit through the magnet l is closed the armature M 'is drawn to Ithe poles ot' the said magnet, and the lever J vibrated i as this circuit is opened and closed.

O 1s a frame, and I is the press-lever piv- Aoted thereto, to which lever .the printing pad or roller and theV feeding mechanism are atrIhe leverl I is jointed to the lever J in such a manner that the vibration of the lat ter operates the feeding mechanism, and throws the pad against the type-wheel. Q is the typewheel, rigidly attached to a shaft having bearings in the frame O. R is a German-silver spring, rigidly attached to one end ofthe typewheel shaft, and having its free end resting on one ot' the pieces H. For certainty of operation this spring is split, and bent in the manner shown. v

S, Fig. 5, is a disk7 rigidly attached to the .ed above the pin type-wheel shaft, but adjustable thereon. The outer face of this-disk is spirally grooved. T is a platinum pin, rigidly attached to, and projecting slightly above, the periphery of the disk S. U is an arm pivoted to the frame 0, and extending to the central part o f the disk S. The free end of this arm is perforated; and V is a headed steel pin, passing freely through the said perforation, and projecting into the spiral groove on the diskS.

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 latter 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', hereafter mentioned. A forked arm, C", is attached to the horizontalarm of the lever P, and, extending upward, its forked portion embraces' the arm U, so that the upward movement of the arm of `lever P will cause the pin A' to be lift- T, and thereby break its contact therewith. To accommodatethis move ment the point of the pin V is slightly rounded, and the spiral groove in which it travels is slightly wedge-shaped, so that the pin V will yield sufficiently for the purpose.

D" is asoft-iron 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 wedge-shaped projections, which alternately rest in V- shaped notches sunken in into the periphery of a disk (not shown) rigidly attached to the ty pewheel shaft, so that the type-wheel will be intermittently revolved by the vibrations of the lever E", and one letter at a time presented to the paper on whichjthe messages areA printed.

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

The pole-changer is constructed as follows: G is an insulator-block attached to the lower end of the lever E". H I'J' are metallic blocks attached to the block G, so as to beinsul'ated from cach other. K is also an insulatorblock, and L' M' are German -sil'ver 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 I and J' as the lever E" ribrates.

N' is a common wire, communicating with the block H' J', and with one pole of the main battery. O' is a wire attached to the block I', and communicating with the other pole of the main battery. The spring M' communicates with the key-board, 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 which isvshow'n in Fig. 1, which may be its position on the instrument.

Q' Q" are semicircular pieces of soft iron attached to the poles of the relay-magnet, and

arranged ,with reference to each other vas shown in Sheet 3, ,thus dividing the' magnetism, and making a double or forked pole.

R'- is a hardened and permanently-1nagnet ized steel tongue or armature, pivoted so as to vibrate between the end of the pieces Q Q".

S'l S" are platinum pointed screws, andv T' is a post projecting from the armature R, and provided with platinum points so arranged as to alternately come in contact with the points of the screws S' S" as the armature R is vibrated. f

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 currents through the instrument, and describe its operation thereon, and the operation of two or moreinstruments acting together, auth first, the direction of the machines a're at rest.

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

Beginning at the primary instrument or station No. l the plus pole ol the main batteryenters the instrument at binding-post No. 7. From thence it proceeds through a wire directly to the piece I' of the automatic pole-changer; thence through spring M' and its wire to the ty1'1e-\vheel 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 sl'ich piece H; thence to the strips E E, and through key C'V and the polarized relay; and from thence out at binding-post No. 8 to the ground. f

At instrument or station No. 2 the plus current passes up the ground-wire to bindingpost N o. 11; thence to key C thence through strips E thence through oneof the keys C and its wire to a corresponding piece, H; thence through the spring lt, type-wheel shaft, and its wire to the polarized relay; thence to binding-post No. l0, and over the line to station No. 1, entering the instrument thereat binding-post- No 9; from thenceitpasses through a wire to spring L'fof the pole-changer; from thence through the block J', which is con-l nected 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 .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 N o. l, Fig. 6, is as follows: I-A f' Ehtering at binding-screw No. 1'2, 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-1 pointed `screws S' S". From one or the other of these screws the current passes to thearmature R', according to the screw in contact therewith; from thence .it passestobinding- 1, except that the former has no pole-changer ,I notches on the wheel U', with which it engages.

-strumentp No. 1. Y

' lallowed to open,

screw No. 13; from thence to the type-wheel local battery. i

The printing-circuit enters bindin g-post No. 15, and passes on'a wire directly to the armature-lever of the Morse rela-y. When this armature-lever is resting-on itsfback point it gonnectswith one end ot' the wire on the local printing-magnet I, so that when the Morse relay-circuit is open the printing-local circuit is through the sa-id magnet I; from thence it passes binding-screw No.14, and to the printing-local battery.

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

The secondary instrument at station No. 2, Fig. 7, is, in all respects, like instrument No.

nor Morse relay, and the printing -local `is brought into action in a di'erent manner'from that described.

The disk corresponding to the disk S is also diti'erently grooved, and the pins corresponding to the pins T and A have noelectrical contact..4 l

U', in instrument No. 2, Sheet 3, is a toothed wheel on the front end of the type-wheel shaft. V is a rectangular lever, pivoted at its angle, and its upper end is provided with a. wedgeshaped point, corresponding to the teeth or W is a point in communication with the printing-local battery, and the lower end of the lever V rests on the point W', when the upper end rests in the said notches. The revolutions of the wheel U' vibrate the lever V', and break its contact with 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 type-wheel stops for a moment, when the said circuit closes -and a letter is printed.

Whenthe line is not in operation the circuits run inv the manner described, with the exception of the local type-wheel circuit at in- The purpose of the contact of the pins T and A' is to allow the circuit to pass around the magnet B.

I As the resistance of the circuit through the shunt is greatly' less than through the magnet, it follows that there is little or no magnetism developed in magnet B', and as'tlie main circnitis running through the polarizedrelaymagnet 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. l wishes to com municatewith a distant station, he depresses the key C', and thereby breaks the main circuit. By breaking this circuit the Morse relay-magnet at instrument No. l is and it will in turn, ou its should -be disarranged, are

back stroke, close the printing-local and throw the printing roller or pad and the paper thereon against the type-wheel, so as to malte, an

impression of the, letterrthen presented,y `1Alt the same time the arm U will be thrown up, and the pin V will rest on theyperipheryfof 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 C is released the current ot' the main battery through the polarized relays and over the Whole line is reversed.

The armatures of the 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.immediately drawn to them. This again reverses the main circuits, and the reverse action takes place.

It' the arm should remain Vup, the instrument would continue to operate so long as the batteries developed sufficient force. But the pin V follows the spiral groove in the disk S until the type-wheely instrument No. l 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 Tand A' in contact, left the springs L and M' resting on the blocks l and J',and the arma-ture R' is thrown against the point S', which creates the usual action on all the type-wheel locals, except that of instrument No. l. Magnet B' being shunted by thel contact of the points T and-A1', the contact of the armature lt with the points' produces no eii'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 alll st op 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 they brouclght into unison, so as to act together., It' the operator at either instrument now depresses key C', the printing-local ot' instrument.N0. -1 will be closed and the shunt taken from magnet B.

In order to print a word or sentence, the operator, before releasing the keyA U depresses the key designated by the first letter of the word or sentence, and, at the same time, releases the key U. The armature will now vibrate rapidly', and carry forward the typewheels until they reach the letter corresponding to the key which is still depressed.

When the point of the spring B, which moves with the type-wheel, reaches the piece H corresponding to thedepressed key it finds lythe vibration ot'the armatures R ceases, and the type-wheel stops, its movement depending upon the vibration of said arma-ture.

Y A letter on the type-wheel is now over the printing-pad. All the printing-locals are-now brought into action-that of instrumentNo. 1, because the armature ofthe Morse relay (A", Sheet 3, instrument No. I) falls on its back point, on account of the main circuitbebeing open; that ot instrument No. 2, because the type-wheel has stopped und allowed the lever V to rest on the point W.

He now finds the key corresponding tothe next letter to be'printed, depresses this key, and releases the key corresponding to the first letter, and so continues until the message is printed.

After he has released the lest key operated upon, the type-wheel of instrument No. 1`

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

It may be here statedv that, es it requires three uninterrupted revolutions ofthe typewheel to bring the shunting-points T and 4A' in contact, and as a letter is printed at least as often as once in each revolution, the said points cannot come in Contact duriuer the 4operation of printing;

1 make no claim to mamy parts of themechanism, which I have shown and described in order to explain the construction and opera,- tion of the instruments; and the specific con- .l' struction 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 claim, anddesire Ito ,secure by LettersPatent iS- 1: The combination, 'substantially as described, of e sunliower system and el polechanger, for the purposes set forth.

2. The combination, substantially as described, of a sunflower system and an automatic pole-changer, for the purposes set forth.

3; The combination, substantially as described, of a sunflower systeme1 type-wheel, and e polarized armature, for the purposes set forth.

, 4. The combination, substantially as described, of arsuniiower system, a type-wheel, e unison-stop, and a polarized armature, for the purposes set forth.

HEINRrcH F. BRUNS, L. A. BUNTING.

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