US839873A - Fire-alarm and watch-service system. - Google Patents

Description

.INm 839.873; PATBNTED JAN. 1, 1907.

J. MoFELL.

FIRE ALARM AND WATGH SERVICE SYSTEM. APPLICATION FILED DEO,12, 1905 4 W v 4 I 9 4 (J wqrceruice :1

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UNITED STATES PAT NT "OFFICE.

JUD'SON MoFELL, OF CHICAGO, ILLINOIS.

FlR E-ALARM AND WATCH-SERVICE SYSTEM,

Specification of Letters Patent.

Patented Jan. 1, 1907.

T anti whom it may concern:

Be it known that I, J UDSON MGFELL, a citirelates to improvements in that t e fire'-alarm signals are received and recorded by a paratus not affected by the transm1ss1on o watchmens signals;

A further object of my invention is to provide such a system wherein the line-circuits are under constant test.

, annunciators, or t ably 1 driven by sa'id motor, a motor-control-ling device 13,'a'nd an automatic switch 14,'asso 'ciated with the motor-controlling device for Another object of my invention is to provide in a signal-system non-interfering transmitters'; and yet another object ofmy invention'is to pr0vide,in conjunction withsuch non-interfering boxes or transmitters, signaling devices for indicating, at any suitable point or points, b the energization-of lights,

box or group of boxes in transmitting a fire-. signal.

. With aview'to attaining these and other objects, which will become ap arent to'those shilledin the art from the/fol owing description, taken in conjunction with the accompanying drawings, my invention consists in the combinations of devices, features of construction, and arrangementsof parts hereinafter moreparticularly pointed out, and specified in the claims.

. In the drawings, Figure an alarmfbo'x with 1 an elevation of be associated parts of. a fire-alarm and watch-service system. Figs.- 2, 3, and 4 are I Throughout the figures like'numerals of reference refer qalways to like parts. f'Inth'e drawings, indicates in general a transmitter-box comprising a motor 11, suitdrive'n, a circuit-interrupting device 12,

actuation thereby.

watch-service systems, and

elike, the operation of any its cover removed, showing diagrammatically the circuit connections I and vdetails of parts of the transmitter mechan- 1 ism.

The transmitting mechanism proper and motor which I have herein shown may be of the ordinary district-box type, the motor being spring-driven and comprising a suitranged to be set for operation by a suitable handle 15, associated with an arbor 1-6 of the train, the trainbeing arranged when properly conditioned and freed for operation to actuate a signal-wheel 17 of the signaling device 12, withwhich-is associated for control thereby a spring-pen 18' and an anvil 19, the signaling devices herein shown being of the open-circuit type. Preferably the pen 18 is formedof a metal strip bent to form two leaves, the point of the pen being at the angle of the joined leaves. v

I preferably connect with the arbor 16 a switch-arm 20, bearing the movable member of a switch 21, shown as acontact-plate 21', arranged to coact with the separated springs 22- 22, of a line breakin and cut-out switch to establish an electrica connection therebetween when the box is in normal'or run-down condition,- I also provide, preferably upon the same shaft 16, an arm 23 which may conveniently be made integral with the arm and which constitutes part of the motorcoiitrolling connection with the non-intervided with a beveled or inclined end portion 23, constituting part of the motor-controlled, switch-releasing means 'to be described, as may best beseen in Fig. 2.

.24,'ndicates a pin carried by the lever-arm 23 and arranged m a slot 26, made in the head 25 of a vertically-disposed bar 25, the lower end of which is provided with an antifriction- .roller 27, bearing upon a lever 28, in the hub of which is provided a keyaperture 28- for the reception of a watchmans key. A limitation-stop 29 is provided for limiting the throw of thelever 28, so thatit will bea arent that the watchmanv by turning t e ever 28 with his key may raise thebar 25,

a'short are only, sufficient tocondition the transmitter-train to cause the signaling devices 12 to transmit-ashort signal-#say one round of the wheel 17. It will be understood,furthermore, that the handle 15 when pulled down" to contact with its limitationstop, .(indi ca ted--at 30) conditions the transmitting mec of rounds of the wheel 17-say five or six rounds. 1

hanism to transmit a plurality able gear-train (not shown in detail) are f'crencernechanism, said arm,. 23;being proand thereby rockthe lever-arm 23 throu h Associated with the reciprocablc bar I provide the motor-controlled two-pole switch 14. inch 1 will now describe.

31 indicates a switch -arm pivoted as at 32 and provided with a laterally-projecting pin 33, arranged within a yoke 34, carried by the bar 25. The yoke 34 is so arranged that when the .arm 31 is in its lowermost position and the bar 25 in normal position the lower extremity of the yoke is out of contact with the pin 33, said lost-motion connection being such that the bar 25 may be lifted to the full extent to which it may be elevated by the watchmans lever 28 without moving the switch-arm 31. The yoke 34 is furthermore of such longitudinal extent that when the switch-arm 31 is in its uppermost position the bar 25 may descend to its lowest position without being stopped by the pin The switch 14 comprises a metallic plate 35, of arcuate form, mounted upon suitable insulating blocks 36 and bearing in insulated relation thereto two metallic springs 37 37,

either of which may be electrically connected with the switch-blade by the interposition of the end of switch-arm 31 between the plate and spring.

38 i dicates a weight for normally main.- taining the switch-arm 31 in position to efleet contact between the spring 37 and plate 35.

39 indicates in general a mechanical latch for maintainingthe switch-arm 31 in raised position when elevated by the motor parts into engagement with said latch. Specifically, as best shown in Fig. 2, 40 indicates a latch-lever provided with a nose 40, beveled on one side, carried by a rock-shaft42, mounted in suitable bearings 43, the latch 40* )assing beneath the metallic plates 35 and rave ing its nose arranged to take through an aperture 35 therein. 44 indicates a spring arran ed 'to tend constantly to maintain the late in position with its nose projecting above the surface of the plate 35. 45 indi cates a releasing-arm carried by the upper extremity of shaft 42 and arranged for cooperation with the beveled or inclined end 23 of the lever 23. Thus when the lever 23 is in normal position, assumed at the completion of each signaling operation of the box, the trip-arm 45 is moved to rock the shaft 42 and depress the lat-ch 40, so that its nose 40 is below the level of plate '35 but when the lever-arm 23 is moved upwardly, removing its inclined extremity 23 from beneath the tri i-arm 45, the tension of spring 42 throws the latch to latching position. It will be apparent now that when the handle 15 of the transmitter is moved to send a true-fire signal the latch 39 is thrown to latching position, and the parts are so proportioned that by the I movement of the rod .25, occasioned by the full movement of the handle 15, the switcharm 31 is lifted to the position shown in: dotted lines 111 F 1g. 1, where it is engagedby 1 the nose 40 of the latch and locked against' the return to normal position until the latch is released by the'return of lever 23 to its normal position at the end of the signaling operation.

While. a mechanism like that heretofore described is susceptible of connection in many specific circuits to accomplish the re sults hereinafter set forth, I have for illustration only shown the box as connected in acircuit such as that described in my prior patent, No. 797,907, dated August 22, 1.905.

Specifically, 46 indicates a central source of energy, such as an electric battery, from one side whereof ext-ends a line-wire 17, including a watchmans recorder 48, and thence extending in series through the pens 18 of the successive boxes on thecircuit, the wire 47 from the last box being. brought back to the central station to a high-resistance magnet 49, the armature 4Q where-of, normally held in attracted position by the magnet, constitutes'an annunciatorwdrop or part of a telltale system, as describcdin my prior patent.

From the opposite side of the battery a wire 50 extends through the fire-signal-receiving devices, illustrated as a bell 51 and a register 52, and thence extends to binding-post 55 of the first box, to which is connected the contact-spring 2 heretofore described. The opposite contact-spring 22 is connected to the binding-post 56, whence the wire 50 extends to the next box and inlike manner through the entire series, said wire 50 being run back to the central station and being connected to the opposite extremity of the coil of'electromagnet 50. whenever the box is operated the line-circuit is broken between the binding- posts 55 and 56 of the then operating box by the removal of the plate 21 oi switch 21 from contact with the springs 22 22 and that the watchsignal recorder and the fire-signal gong are respectively connected in the line or opposite sides of said 'break'that isto say, one between the breakin the line and one side of the battery and the other between the break in.

the line and the opposite side of the-battery. For watch service I provide a connection paralleling the wire 50 from a point beyond the box most remote from central to a point between the battery and the fire-signal-receiving devices, such connection being illustrated at 53 and preferably including a switch 54, which may, ifdesired, be an automatic time-switch arranged to close during tact-plate 35 is connected by wire 58, through a magnet-coil to be described, withwire 59,

which extends to the anvil 19 of the circuitmtermpting devices. It will be apparent It will nowbe apparent that 37, thencei'by wire SS -to the bind is set by the operation of the handle -15 to sees-7s now that as the transmitter stands in normal condition with the pen 18 and anvil 19 in separated relation and the lever 20 in the position shown a closed circuit is established from the battery through the'fire-signal-receiving devices, the series of cut-out switches 21 in the signal-boxes, the high-resistance magnet 50, and back through the wire 49 and the watch-signal-receiving device 48 to the op osite side of battery 46. f

t will be seen that the circuit. just described includes the magnet 49, which is of such high resistance that the current-flow through the circuit is insufficient to actuate the registers or other signal-receivinginstruments, The parts are so constructed, however, that if the magnet 49 be short-cirouited by the establishment of a bridge of lower resistance between wires 47 and 50 the signalreceiving devices are caused to commence operation. When now a watchman actuates the box by the control-lever 28, as heretofore describ d, the signal-wheel 17 iscaused to make one-revolution or round, and the line-circuit is automatically broken by the switch 21.

Assuming the, switch 54 to be closed, it will be seen'thatwhenever' the pen 18 drops into a notch in the signal-whee and makes contact with its anviljlQ a circuit is established, as follows: from battery .46 by wire 47 through the recorder 48 120 the pen'18, thence throu h anvil 19 and wires 59 58 to the .con-

tactate 35 and the switch-arm 31 to spring re and back over the line-wire 50, to s unt-wire 53, and throng seen thatin this circuit the fire-signaling apparatus is not included and the hi h-resistance magnet is also'cut out, so that t e record of the watchmans report is received only the instrument 48. By this arrangement amfenabled to place fire-alarm apparatus at any desired points throughout the areato be protected for the purposeof alarming occupants and notifying those in authority of the existence of fire, ,with "the, assurance that such instruments will not be actuated by theuse of the transmitters for watch-service pur-. poses, and at the same time I am able to receive the watch-signals at any desired point or station. When, however, the transmitter send its full or-,fire signal, the lost-motion switchcontrolling mechanism automatically throws the switch-arm 31 to uppermost or dotted-line position,

where, as heretofore described, it is. automatically latched and held until the return of the motor parts to normal or run-down position. In the interval before th'e restoration of the switch;the

signal-wheel- 17 'niakes its predetermined number of revolutions or rounds, and each time the pen 18 dr a circuit is establis transmitter and wit h the last said connection to the opposite sideof, the battery. Itwill be both directions. s intoa notchof awheel. ed, as follows: from the,

battery 46, by wire 47 through the receiving 7 apparatus 48 to the pen 18, thence to the anvil 19 and through wires 59 and 58 to the switch-plate 35., throu h the swi ch-arm 31 to the spring 37, and t ence b e and binding-post 55 to the side 0 wire 50, extending back through the signaling instruments 52 and 51 to the opposite side. of the battery. It willthus be seen that a fire-signal is invariably received "by the fire-signal registers and gong and the specific embodiment shown the watch-signal recorder 48 as well.

48, it may obviously be included in the wire 53 insteadof wire 47 to be out of the firealarm signaling-circuit;

I prefer that in the system described the "transmitter be non-interfering, and to this end I provide, in conjunction with the motorcontrolling devices of the box, a disabling mechanism for automatically preventing the.

box from operating whenever some other transmitter nearer the central station is transmitting its si a1 or for stopping any olding the untransmitted portion of its signal whenever any transmitter nearer the central station is started in operation'while the more remote transmitter is sending its signal. To this end I provide 'inthe signalin -circuit of each box an electroresponsive ev ice and arrange 'a motor stopping. or disabling device to be controlled thereby, said motor-disabling device being timed in its niotor-sto ping operation, so that -when conditio'ne by the electroresponsivedevice tostop the motor it delays its function during a predetermined period. Specifically, 61 indicates an electromagnet included between the wires 59 and '58 of the signaling-circuit of the transmitter, said magnet being provided with an armature 62, carried-b a lever 63, *arranged to moye towardan from the bar 25 at right angles to said bar. Pivotally mounted upon the lever 63 for movement therewith into or out of-operative relation to the bar 25 and for limited movement thereon in a lane parallel to bar 25 is a pawl 64, provide with a nose 65, and prefera 1y having arms 66 straddling the extremity of lever 63, said pawl being maintained, as by a weight 67, out of contact with the lever-arr'n-63. 68 indicates a rack carried by the under side of the bar 25', with which the pawl is adapted to cooperate, as shown in Fi 4, to. prevent downward movement of the bar be- {end thepoint wherethe pivoted pawl is rought into close contact with its supporting-arm 63. Adjusting-screws 69 and 70 are provided in the pawl 6'4 and weight 67', re

spectively, to .vary the throw oft e pawl in It will be understood that the parts are so arranged that when the armature 62 is attractedbythe magnetfil the llf itbe desired to receive nothing but watch-reports on the recorder ICC nose 65 of the pawl is thrown entirely out of the path of the rack 68, so that the bar 25 arm 63, thereby stopping the movement of the pawl and through its inimovability stopping theoperation of the motor through the *instrumentality of the controlling-rod 25 and lever 23. It will be understood, furthermore, that the time that it takes to move the pawl 64 to motor-stopping position from the position it occupies when it first engages the rack is greater than the interval during which the transmitting instrumentalities open the signaling-circuit in transmitting any -signalthat is to say, the'interval is longer than that which the signaling-wheel occupies in making the longest space required between characters in its signaling operation. If desired, the lever 63 may also be provided'with a bell-clapper 71,, cooperating with any suitable gong 72', supported in operative relation thereto, so that the gong may be struck every time'the lever-arm 63 rises.

"In conjunction with the parts described I provide means for short-cireuiting the pen and anvil 18.19 each time the motor is stopped by the operation-of the pawl 64, and tothis'e nd I provide springs 74 and 75, connected, respectively, by wires 76 and 77 to the wires 59 and 47, respectively, and ar-- ranged upon theweight-arm 67 a metallic spring 78, adapted to be elevated by the pawl 64to make contact with and connection betweensprmgs 74 and 75.

its signal.

Under normal conditions it will be v,observed the looking or disabling device stands in position for engagement with the rack of'the bar 25, and as soon as the box is'set inmotion for an ordinary signaling operation :the depression of the pawl 64 commences. The period of time necessary to depress the'pawl into contact with its carryingarm 63 being longer than the longest interval between the notches of the signaliiigwheel, however, the motor is not stopped when the first notch in the wheel comes opposite pen 18. Instantly, therefore, when the pen 18 drops into the notch the electromagnet 61 in the signaling-circuit is energized, attracting its armature and throwing the disablingpawl out of engagement with therack 68. As soon .as the circuit is again broken the pawl reengages the rack, and this operation continues as longas the box is transmitting It Willfbe apparent, however, that if some box'nearer the central station on the line the box under consideration (which to avoid confusion I may term box. 1 be transmitting a signal, either a service or a fire-alarm signal, the he broken between said box No. 1 and the central station, so that no current passes through transmitting-box (which I may call box has completed its signaling operation and the continuity of the line betweenthe box 1. and the central station is restored, the said box 1 received current through its coil 61, through the short circuit around the pens last described, even though the wheel 17 has stopped in position to separate contacts 18 and 19, so that the magnet attracts its ftlillik" ture and instantly releases the motor mechanism for furth'eroperation. It will thus be apparent that at whatevercondition of its signaling operation a box maybe it will be stopped or disabled before it'has completed round, when'any box nearer the central star tion commences to'transmit its signal, while any box remote from the central station, pulled after a-nearerboxhas commenced its signal, is not permitted to start its signal until after the box nearer central station has completed its signaling operations. In this way it is assured that in whatever order the boxes may be pulled or actuated asubstantially complete signal is certainto be received from each box, although the signal from any box remote from central station may be temporarily interrupted ,to permit the transmission of a complete signal from a box closer to central station.

I also prefer to provide, in conjunction with a system such as that described ,means for indicating visually, as by lamps or annunciators, at suitable supervisory stations the. box. or section of boxes whence a fire-sign al .is-transmitted. This is particularly desirable in conjunction with the watch system, as by placing a battery of lamps corresponding to the various sections of the building or other district to be protected, adjacent the station of each Watchman. the section whence an alarm is turned infor the particular box, if desired, maybe instantly shown to the watchman by the action of the corresponding light or annun'ciator withoutthe delay incident to the transmission of a complete signal and without'the installation of a recorder at each watch-station. To this end I provide, preferably, a separate battery 80, connected on the one side, as by a wire 81, with the wire 41, and on the other sideconnected by-wire 82, including a high-resistance coil 83' with e binding-post 84 of thebox to be supervised, whence extends a wire 85 to a spring 86, constituting one of a pair arranged to be electrically connected by a plate 88, carried by the switch-arm 31, the remaining spring 87 being connected by Wire 89 with the wire 77, which, it will be remembered, is connected to the wire 47, so that a complete circuit is established through the wires in the order described, as long as the switch-arm 31 is depressed. a

The high-resistance magnet has associated therewith an armature 90, adapted, when released by the magnet, to close contact between two contact- points 91 ,91, included in one line-wire 92 ot'an incandescentlight-circuit, whereof 93 is the opposite line- ,wire, 94 the source of power, and 95 95 the bridged lights.

Obviously the li hts 9 5 may be located at the different watc ans stations or at other suitable points to indicate at "any number of places the operation of the.

box whenever theswitch-arm 31 is moved.

I If more than one box be arranged in a section and it'be desired to indicate only the section and not the'particular' box whence the signal emanates, it obvious that the springs 87 88 of the remaining boxes-will be looped in the wire 82 in series.

While I have herein-described in some de tail specific devices and arrangements of parts adapted for the practice of my invention, I do not desire to be understood as limiting my invention in its broader aspect to theparticular construction shown and described will be apparent that numerous -modifications might be made in the specific construction and arrangement of. parts without dep'arture from the spirit and scope of myinvention, and it will be apparent that the specific character and arrangement of the cir cuits might readily be changed without departure from the spirit of my invention.

ent of the United'States, is-

1. In a fire-alarm watch-service system,'a

mitting a watch signal, and .with. another" signal-receiving instrument when transmitting a fire-signal.

2. In a fire-alarm and watch-service-sys tem, a plurality of signal-receiving instruments, a transmitter adapted and arranged for actuation to transmit a watch-signal and to transmit a different signal'for fire-alarms, connections for establishing a circuit. including the transmitter and certain of the. signalreceiving instruments and excluding pther signal-receiving instruments for watch-sig naling purposes, and means for automatically varying the connections to include said excluded receiving instrument in a signalingcircuit with the transmitter when the transmitteris actuated to transmit a firealarm signal. 3

In a fire-alarm watch-service system, a plurality of signal-receiving instruments, 0. transmitter'adapted to be actuated to transmit a watch-signal, or a difIerent-fire-a larm signal, connection for. establishinga normal circuit including said transmitter and excluding certain signal 'receiving instruments,

and means controlled by the transmitter for automatically varying the circuit connections to include said excluded signal-receiving instrument in a signal-circuit with the transmitter.

4. Inc; fire-alarm and watch-service system, a transmitter, signal-receiying instruments, a switch, and connections normally established by said switch including receiving instruments in signaling relation to the V transmitter, open connections controlled by said switch, for connecting certain other signal-receiving instruments in signaling relation to the transmitter, means controlled by the transmitter for operating said switch.

5. In a fire-alarm and watch-service system, a signal-transmitter, a double-throw switch connected therewith for actuation thereby, a signal-receiving instrument ar-- ranged and adapted for connection in signaling-circuit relation with the transmitter when the switch is in normal position, and another signal-receiving instrument arranged and adapted for connection in signaling-circuit with the transmitter when the switch is thrown to opposite position by the actuation of the transmitter.

'6. In a fire-alarm and watch-service system, a transmitter involvin a motor, signal I ing devices, means for con itioning the mo Having thus described my invention, what I claim, and desire to secure by Letters Pattor for a certain amount of movement to transmit a short watch-signal, signaling de- I I vices gor conditioning the motor for a greater amount of movement to transmit a long firenormally having connection through the switch for Si naling relation with the transmitter, and t e other being arranged for signaling connectlon with the transmitter when the switchis actuated by the longer movement of the motor; I

7. In a fire-alarm and watch-service system, a transmitter involving a motor, a means for conditioning the transmitter to transmit'a watch-signal; another means for conditioning the transmitter to transmit a fire-alarmsignal,' two signal-receiving instr'u-' merits, a switch for normally establishing signaling-circuit connections between the transmitter and one signal-recciving device, erable to establish circuit connections inc uding the excluded signal-receiving device in signaling relation to the transmitter, and

switch-controlling means operably associated with the means for conditioning the transmitter to transmit a, fire-alarm signal, arranged to be functionally unaffected by the operation of the means for conditioning the transmitter to transmit a watch-signal.

8. In a fire-alarm and watch-service system, a signal-transmitter involving a motor,

normally open contacts of said switch, adapted to be closed by movement of said switch to establish a signaling-circuit including the lastsaid signal-receiving instrument and the transmitter, means for conditioning the transmitter to transmit one signal without moving the motor and switch connection beyond the limits of the lost motion permitted therein, and means for conditioning the box to'transmit another signal arranged to move the switch -lever to functionally operate the switch'to vary the circuit connections.

9. In a fire-alarm and watch-service system, a central source of current-supply, linewires extending from opposite sides thereof, a signal-transmitter providing means for automatically breaking 4 one side of the line when active, said transmitter.involving also a coacting pen and anvil, one connected with theunbroken side of the linefand the other adapted and arranged for connection through a suitable switch with the broken side of the line on either side of the break made in the transmitter, the switch, a signal-receiving instrument in the side of the line to be broken by the transmitter-switch, connections for shunting the break and said signaling-receiving instrument, whereby when the transmitter-switchis thrown to connect its signaling pen or anvil with the side of the broken line remote from the source of current-supply, a

circuit may be established through the unbroken line the transmitter pen and contact,

the switch and said shunt connection, to the exclusion of .the said signal-receiving instrument, and a second signal-responsive instrument included in the signahng-circuit last described.

10. In a system of the character described, a source of current-supply, line- wires 47, 50, acircuit-breaking switch, a signal-transmitter controlling said switch, said transmitter comprising a motor, make-and-break devices, connection between one side of the make-anthbreak devices and the wire 4.7. connection between the other part of the make devices and the poleof adouble-throw switch, said switch, operating connections between the arnroi said switch and the transmitter-motor, connection between the opposite contacts of the said switch and opposite terminals of the'line-breaking switch, a si 'naLreceiVing instrument in the side of the l ine adapted to be broken by the linebreaking switch, a shunt around-the linebreaking switch and the-signal-receiving instrument, and asecond signal-receiving 1nstrument, in a suitable part of the'circuit established through said shunt.

11. In a system of the character described,

a transmitter involving a motor, a doublethrow switch 14, and lost-motion connections between a suitable part of the motor mech-.

anism and the switch-lever, substantially as described, y

12. In a system of the character described,

atransinitter involving a motor, a double-- throw switch comprising a switch-arm arranged. to be moved by a motor part from normal to abnormal position, means for latching the switch-lever in said abnormal osition, and means, controlled by the motor, ibr releasing said latching means.

-].3. In a system of the character described, a transmitter com rising a motor, a lever 23 associated with t e motor part, doublethrow switch 14 comprising a switch-lever 31, lost motion connection between the switch-lever 31. and lever 23, a latch 39 for latching the switch-lever inv abnormal position, said latch being associated with one of the systems ofparts movable with the lever 23, to automatically release the switch-lever 31 when lever 23 stands in normal position.

14. In a signaling system, a transmitter comprising circuit-interrupting devices and a motor therefor, a signaling-circuit, an electroresponsive device in the signaling-circuit,

motor-stopping means for stopping and maintaining themotor against movement when otherwise conditioned for operation, said means being definitely timed in relation to the operation of the circuit-interrupting device, and movable to operative or inoper ative position, and said means being controlled by the electroresponsive device.

15. In a signaling system a transmitter comprising circui t-i nterruptin g devices, and a motor thereiona signaling-circuit, means for maintaining the motor against movement when otherwise conditioned for operation, timed in relation to the circuit-interrupting devicesto operate and stop the motor after a definite movement oi? the motor part, and an electroresponsive device in the signaling-circuit controlling said motor-stopping means.

16. In a signaling system, a transmitter having a make-and-break device and .a motor therefor, a signaling-circuit, electrorespon movement of the motor on y after the main tenance of certain conditions in theelectromagnet for a redetermined interval timed in relation to't e operation of the motor.

17. In a signal system, a transmitter comprising a motor and circuit-interrupting devices, a signaling-circuit, anelectromagnet in said circuit, a pawl carried by said electromagnet arranged when the armature is in one position for engagement with a part movable with the motor, said pawl being arranged for a limited degree of movement with the coaoting moving member before stopping the motor.

18. In a system of the character described, a transmitter comprising aunotor, circuit-interrupting devices, a signaling-circuit, an electromagnet in said circuit, a pawl associated with said armature for bodily movement thereby, arranged for limited movement in another plane, anda rack-rod arranged to be moved by the motor disposed for coaction with the pawl when the latter is bodily moved to one electromagnet.

ber-wheel driven thereby, make-and-break devices comprising an anvil, and a pen, said pen being composed of two leaves electrically continuous, and a normally charged circuit including the leaves of said. pen in series therewith. I

20. In a system of the character described, a primary circuit, signal-transmitters therein, a normally closed circuit including a highresistance magnet, a switch controlled the A transmittcr'for opening said normally closed circuit, and a normally open annunciator-cirresistance magnet.

In testimony whereof I hereunto set my hand in the presence of two witnesses.

J UDSON MGFELL. In presence of- MARY l ALLEN.

19'. In. a signal-transmitter a motor, a nu mcuit controlled by the armature of said highposition by the armature of the

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