US843746A - Selective transmitting system. - Google Patents

Description

J L. HALL.

PATENTED FEB. 12, 1907.

-l SHEETS-SHEET 1.

wilj'nesses.

lm/enBor i John LHaH.

'No. 843,746. PATENTED FEB. 12, 1907.

J. L. HALL.

SELECTIVE TRANSMITTING SYSTEM.

APPLICATION FILED 13110.9,1901- 4 SHEETS-SHEET 2.

Fig.5.

, Fig.5.

' John LH a 1. M

J. L. HALL. SELECTIVE TRANSMITTING SYSTEM.

APPLICATION FILED l)EO.9, 1901.

PATENTED FEB. 12, 1907.

4'SHBETS-8HEBT a.

a Li T (DiCnesses:

M z b..

N0. 843,746. I PATENTED FEB. 12, 1907. J. L. HALLi SELECTIVE TRA-NSMLTTING SYSTEM.-

' APPLIOATION FILED DEO.9,1901.

4 SHEETS-SHEET 4.

i 3 26 I ll i i ----------------jg F----- T Q:6nesses so i Inventor:

John L. Hall.

UNITED STATES- PATENT oFEro JOHN-L. HALL, OF SOHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.-

SELECTIVE TRANSMITTING. SYSTEM.

To all whom it may concern: Be it known that I, JOHN L. HALL, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Selective Transmitting Systems, of which the following is a specication.

A This invention. relates to selective transmitting systems, the object being to provide an organization by which a considerable 20, Such a system number of separate signals may, be trans mitted over a small group of wires selectively so as to operate particular signaling instruments at a receiving point or station.

The organization herein described is particularly adapted for use in a system where a single transmitting instrument to send the several signals and a single receiving'appa .llatus at a distant station are employed. may be used aboard ship, as m an engine-room telegraph, by which difi'er ent signals may be transmitted from an officer on deck to the engine-room or in transmitting orders from the conning-tower of a war vessel to the several gun-stations.

Parts of the invention are of use for other purposes than transmittingsignals, as in operating selective apparatus of any kind through a small number of transmissionwires.

I car out the invention by providin a group 0 wires in the form of a cable which connects the transmitting-station to the reto employ a signaling device of the ceiving-station,

other the return having itshoperating-eoil connected across Specification of Letters Patent. Application filed December 9, 1901. Serial No. 85,133.

a transmitting device being employed by which these wiresniay be con nected in groups takentwo atfla time, so as to' form of one wire the outgoing and of the' side of an electric circuit in which is includedat the receiving-statidh an.

inations possible witha certain num- Patented Feb. 12, 19Q7.

a different 'pair of cable-wires. Each receiving-magnet is provided with an armature, which plays between two contacts controlling a local circuit in which are included signaling-lamps arranged behind glazed openings in the receiving-indicator, upon which numbers or other signals may be printed.

'Thus when a definite signal is delivered by turning the handle of the transmitter to a definite position a particular lamp will be illumined and the the indicator, and the receivingoperator may examine a code, and thereby learn the character of the signal, or the signaled information may itself be printed upon the illumined panel.

The several receiving instruments being connected across the wires ofthe cable in parallel relation afford a network of circuits which permits several receiving instruments .to draw current at the same time. strument directly across the active wires,

number flashed out from The inhowever, carries a larger current than any of the others, and in order to prevent more than one instrument res onding I give the armatures 'a sufiicient blas by means of a spring to prevent movement except undei'a definite current strength. For'exampl of the kind above referred to Where four signaling wires are employed taken in grou s of two the springs may be adjusted to resistforty per cent. of the maximum pull of the receiving-magne't, and in such a case only the one connected directly across the signalingcircuit will be operated.

I'provide' also-means for signaling back to I the transmitting-station notice that the-sig-' 'nal has-been transmitted. For this urpose I employ an extra -wire inclosed the same sheath as the si aling group and in which at the transmitt1ng-station is inserted a lampor other signaling device, which indicates when the lamp at the receiving-station has been lighted, and since the lighting is determined by the-movement of the controlling magnet or relay the transmitting ofiicer is advised immediately as to the; proper transmission of the signal.

-My invention embodies various features,

the novelty of which will be hereinafter more fully described in the specification and definitely indicated in the claims, as well in thesystem as in the type ceiving instruments.

In t e accompanying drawings, whichilluse, in asystem of transmitting and re- Figs. 5 and 6 trate the invention, Figures 1 and 2 are a top plan and horizontal section of a signal-trans- 5 transmitting instrument.v Fig. 4 is a detail of the main circuit-controller. Fig. 5 is a development of the contact devices for controlling the connections with the transmittingcable. Fig. 6fis a diagram of the signaling system. I 1 igsa7 and 8 are a front elevation and vertical section of receiving a paratus, and Fig. 9 is a view of one of the pollirized receiving-magnets.

Referring first to the transmitter, as depicted in Figs. 1 to 5, 1 represents a metal box in which the parts are inclosed Within this boxis rigidly mounted a group of insulated contact plates or segments 2 2 2 2 2: 3 3 3 3 3*. These are arc-shaped segments of metal se arated by insulating strips and all insulate froma sup orting-bolt 4, secured to therycase. Each 0 these segments is provided at different parts of its arc with recesses or notches, the urpose of which will be hereinafter more fu ly described. The segments are arranged in two groups, ametallic contact 5 6, carried by arotary hub 7,. being adapted,

to bridge any lpgir of contacts of the respec tive groups. will be seen, the contact 5is long enough to bridge any pair of the group 2 of segments and the contact 6 pair of the group 3. These contacts are spring-mounted, as indicated, on the rotary hub, and the latter is controlled by an arm 8 on the outside of the box, in which is pivoted an operating-handle 9. The operating-handle carries a finger 10, which prevents its depression except when it is in alinement with some one of a group of notches 10 1.0 10 around the outer edge of the top of the box, as indicated in Fig. 1. a i

The inner end of the handle is threaded by a rod 11, normally pressed down by a spring 12, maintaining out of contact a metallic.

ring 13 and pair of contact-brushes 14 14 The metallic ring is secured to an insulated collar mounted on the rod 11, as indicated in Fig. 4. When the handle 9 is depressed, the 'rod 11 is lifted against the tension of the spring 12 and brings into engagement the contact-ring and the brushes, therebybridging a circuit between the binding-posts 15 15, connected in the main circuit. By means of this construction it is impossible to close the main circuit except when the handle is in alineii'ient with one of thenotches 10= 10*, &c., since in no other position can the main circuit-closer be lifted. Eachcontact-segment, as aboveindicated, is provided with a group of notches, as will be seen in'Fig. 2 at 16 16, &c. "Each of. these notches is sufliciently wide to clear one of the contact bridges or brushes 5 6' when the latter passes overit.

to bridge any.

it s ef tli l controller-segments, an examination of which will render clear the relation of the parts. The vertical dotted lines in Fig. 6 illustrate the different signaling positions of the bridging contacts which occur when the handle is opposite some one of the notches 10 10*, &c. When in such a position, it may be depressed, closing the main circuit at the circuit-closer 14 14 hereinbefore de' scribed. This puts the potential of the supply-circuit, (indicated by the signs plus and minus,) which may be the lighting-circuit of the vessel when the system is employed .in such a place, upon the segment 2, and the movable bridging contact cross-connects this with some other segment of the group 2. For example, if the handle is turned so that the bridging contacts 5 6 are in the osition indicated by the extreme left-hand 'lvertical line they will cross-connect segmean t' lfl with segm ent 2*, all the other segments 24'. 2 of the upper group being dead, since, as *Will be evident from the figure, the bridging contact 5 rests over the notches of these bars, and therefore forms no contact with them. Onthe other hand, if the lever 9 had been shifted to a position to bring the'bridging contacts to the position of the second dotted line in Fig. 6 then the segment 2 would be out of contact with'the brush, but segment 2 would be rendered alive by cross connection through the brush with segn'ient 2. Thus by different positions of the handle the plus wire may be successively thrown upon any of the four segments 2 2* 2 2 and the minus wire upon any one of the four segments 3 3 3 3, and since there are four signal-wires any one of six combinations may be made..- for example, 1 2,1 3, 1 4, 2 3, 2 4, 3 4., By

means of the polarized instruments this range ofcombinatio'ns may be multiplied by two,

rod

in the cable since obviously there may be six combina-v tions by which'the armature may be shifted toward the right and six by which it may be shifted toward the left. There are therefore twelve positions for the bridging contacts 5 6, which are indicated by the vertical dotted'lines' in the upper part of Fig. 6. Assum ing, tor example, that the operating-handle of the transmitter is shifted to the first position and is pressed,segnrents 2 2 are connected and 3 3 thereby throwing potential,

on wires 0 and (Z. As will be evident from the lower part of Fig. 6, the bobbins, of the different receiving-magnets are connected across the wires of the cable, so as to couple them in the order above recited, Thereisv therefore only one instrument which directly cross-connects wires 0 and dnamely, themstrunientat the extreme rightand this in strument g'etting allarger flow of current than any of the others shiftsi ts armature and closeethecircuit on a signalingdamp 17, or 17 &'c. Thearrnature of each receiving magnet ispreferably polarized by an excitnected through the contact to the nega-' 'ceiving-magnet, a coil ing-coil, as indicated in Fig. 6, and the sev-' of this circuit governed bythe several armatures'of the receiving-magnets, as will be evident from the diagram. Y a

en any lamp-circuit is closed by its re- 19, included insaid circuit, operates a contact 20 and closes a path to a return-wire 21,"inclosed within the cable and returning to the transmitting-station, in series with which is an indicator, as a lamp 22, in the transmitter. The returnwire 21 at the transmitting end is connected through the signal-lamp 22 and contacts 14 and 14 to the positive terminal of the source of current and at the receiving end iscontive terminal of the source of current. The contact 20- also controls an. alarm bell or in dicator 23 at the receiving-station. The polarized magnets of the receiving instrument are indicated in Figs. 7 8, and 9; Each of these consists ,of a magnetic circuit fOIIP-Bd of soft iron, in the air gap of which is adapted to rock a pivoted armature'24 between two contact-points 25 25 Thefixed cores are polarized by spools 26 26, connected in series relation between thecable-wires at c d in the order hereinbefore referred 'to-that is to say, between 1 and 2,1 and '3, 1 and 4, 2

and 3, 2 and '4, 3 and-4, respectively and the armature is polarized by a coil 27, 'having an opening sufficiently large to permit the armature to play between the contact-points 25 25*. To return the armatures to the normal position whenthe magnets are denergized and to hold them inthis position, I mount strips of spring metal 30, Fig. 9, ii idly on the armatures near their lower en s and at right angles thereto. The. ends of these strips 30 protrude into slots formed in the fixed cores of themagnets 2626*. These relays or polarized magnets are mounted in a box or casing 28, containing the receivinglamps, which are controlled by the relays.

The front of the casing is provided with glazed o enings, as indicated in Fi 8 at 29, upon w ich may be painted or ot erwise marked any desired information to be conveyed to the receiving-operator. ting the signal before the circuit can be closed and any part of the system rendered alive the handle 9 must be depressed, which can only take place When it stands in proper position 'send a signal. The particular signal set depends on the arcover which it is shifted and the pair of wires in the cable which are connected in circuit.

What I claim as new, and desire to secure byLetters Patent of the United States, is-

1. A selective transmission system comprising a plurality of wires between the'trans mitting and receiving apparatus, polarized Thus in transmitreceiving apparatus comprising'a-plurality of magnets respectively connected across different pairs of. wires, a source of electric energy, and transmitting apparatus .for throwing said source with either polarity across different pairs of wires a pair at a time. 2. A selective transmission system comprising a plurality of wires between the transmitting and receiving apparatus, transmitting apparatus for coup ing the wires in dif- 'ferent pairs and connecting apair at atime to the terminals of a source of voltage with either polarity, ;a plurality of polarized re+ ceivers connected respectively across -the diiierent pairs of wires, and' indicators controlled by the several polarized receivers.

3'. A selective transmission system comprising a plurality of transmission-wires eX-' tending from the ing' apparatus, a source of electric energy, transmitting apparatus for selecting said Wires a pair at a time and connecting them to larity, electromagnetically-actuated receivers connected respectively across the different pairs of wires, indicators controlled by the armatures of the receivers in opposite directions of movement, and meansfor biasing. the armatures against movement either direction. a 4. A selective transmission system-committing and receiving apparatus, a source of electric energy, transmitting, apparatus for imposing sai source on different pairs of wires takena pair at a time,-the several wires occurring in more than one pair respectively, a plurality of receiving-electromagnets reand electric lamps selectively controlled by said receiving-magnet Q. T

5. A selective signahtransmission system" comprising a plurality of wires between the transmitting and receiving apparatus, a source of electric energy, transmitting apparatus for imposing saidsourceondifierent era]. wires occurring in more than one pair, a plurality of receiving-magnets"connected respectively tothe different. pairs of wires, a return signal-circuit actuated by each receiver, and an indicator in said circuit at the transmitting-station.

transmitter, a receiver, aplurality of wires between them, a source of difference of potential, means in the transmitter for selecting the wires a pair at aftime andconnecting them to said source with'either polari and I a plurality of polarized magnets in t e re: celver connected respectively across the different pairs of wires.

7. A selective signal system comprising a transmitter, a receiver, a plurality of Wires between them, and. a manually-operated transmitting to the receiv-. A

the terminals of said source with either poprising a plurality of wires between the trans- IOC spectively connected across the several pairs, I

, pairs of wires taken apair at a time, the sev- 6. A selective signal system comprising a switch in the transmitter to which-the several wires and the mains from a source of electric supply are connected and which is arranged in its different positions for selecting any pair of the wires and connecting them a pair at a time to said mains with either polarity.

.8. A selective signal system comprising a transmitter, a receiver, aplurality of wires between them, mains from a source of electric supply, means in the transmitterfor se lecting any pair of the wires and connecting them a pair at a time to the mains with either polarity, polarized relays in the receiver connected respectively between the several pairs of wires, a circuit closed by a relay when. operated, and an indicating device in. said. circuit.

9. A selective signal system comprising a transmitter, a receiver, a plurality of wires between them, a source of difference .of potential, means in the transmitter for selecting any pair of the wires and connecting them with said source with either polarity, a switch break-points in the several segments distrib utedso that any pair of wires maybe selected and connected to the supply-mains with either polarity.

11. A selective signal system comprising a transmitter, a receiver, and a plurality of wires between them, said. transmitter having two sets of conducting-segments, the several wires of the system being connected we segment of each set, a contact for each set, leads from a source of electric supply connectedto said contacts, break-points in the several segments distributed to connect different Wires with. said leads in different angularpositions, and an operating-handle for shifting the contacts to cut different groups of Wires into circuit.

12. A selective signal system comprising a transmitter having a pivoted operating-arm, a receiver, a plurality of wires between them asource of difference of potential, means in the transmitter controlled by said operating arm for selecting any pair of the wires and connecting them with said source with either polarity, a switch in. the circuit of said source scams closed only when said operating-arm is in operative position, means in the receiver affect.- ed by said connections to give an indication and to close a circuit, and indicating means at the transmitter actuated when said circuit is closed.

13. A selective signal system comprising a transmitter, a receiver, and a plurality of wires between them, said transmitter having a plurality of conducting-segments, positive and negative mains from a source of electric energy, each wire of the system being connected to two of said segments and each of said mains being connected to a segment, a

contact device cooperating with the segments, an operating-handle therefor, breakpoints in the several segments distributed so that any pair of wires may be selected and connected to the supply-mains with either polarity, means in the receiver actuated I when such connection is made to give an in dication and to close a circuit, and indicating circuit is'closed. v v v 14. A selective signal system comprising a transmitter, a receiver, and a' plurality of wires between them, said transmitter having a plurality of conducting-segmcnts, positive means at the transmitter actuated when said.

and negative mains from a source of electric energy, each wire of the system being connected to two of said segments and eachof said mains being connected to 'a segment, a contact device cooperating with the segments, an operating-handle therefor, breakpoints in the several segments distributed so that any pair of wires may be selected and connected to the supply-mains with either polarity, a switch in the supply-circr it, and means preventing closure of said switch eX- cept when the operating-handle is in an operative position.

15. A selective signal system comprising a transmitter, a receiver, a plurality of wires between them, said transmitter having two sets of conducting segments, the several wires ofthe system being connected to ase ment of each-set, a contact for each set, lear s from'a source of electric supply connected to said contacts, break-points in the several segments distributed to connect different -wires with said leads in different angular positions, an operating-handle for shifting the contacts to out different groups of wires into circuit, a switch in the supply-circuit, and means preventing closure of said switch except when the operating handle is in an operative position.

In witness whereof I have hereunto set my hand this 6th day of December, 1901. Witnesses:

BENJAMIN B..HULL, MARGARET E. WOOLLEY.

Images