US1078985A - Signaling system. - Google Patents

Description

U. E. BEACH.

SIGNALING SYSTEM. APPLICATION FILED HAYS, 1912. RENEWED JULY 21 1,078,985.

Patented Nov. 18, 1913.

. ing alarmsignals to a local fire bri nals can sans rarer CLARENCE E. BEACH, 0F BINGHAMTON, NEW YORK, ASSIGNOB, TO GEORGE O. KZNAPP, OF NEW YORK, N. Y.

SIGNALING SYSTEM.

To all whom it may concern:

Be it known that I, CLARENCE E. BEACH, of Binghamton, in the county of Broome and State of New York, have invented certain new and useful Improvements in Signaling vSystems, ofwhich the following is a specification.

My invention relates to signaling systems and particularly to alarm systems for protecting localized territory and for protecting buildings,-such, for example, as factory buildings and factory premises, Systems of this kind are designed, primarily, for sendade and for warning the occupants of a building or premises to escape. Such systems are, however, modified so that testing or drill sigbe sent thereover to selectively control the various alarm devices. Usually, signal controlling mechanism is provided at each of a number of stations, together with a local alarm device and at some central point general alarm mechanism is installed,

the local alarm devices serving to warn the occupants at various parts of the-building orpremises and the general alarm devices "serving to notify the fire brigade and to even though some other station is at the same direct them to the calling station. At each station switch mechanisms are also provided whereby the circuit conditions may be ad justed for selection of desired alarm devices. In the particular system which my invention covers, adjustment can be made to cause sounding of all the alarm mechanisms both localand general; to cause any one or all of the local alarm devices to be responsive and the general alarm mechanism to be silenced; or to cause response of only the general'alarm mechanism and silencing of all the local alarm devices. It is, however, very important that actual fire alarms should at all times take precedence over testing or drilling alarms, so that the fire brigade will immediately be notified as soon as an alarm of fire is sent from any station,

time using the system for testing or drill purposes.

Among the important objects of my invention are,'th erefore, to provide a simplified system for an alarm of tire to cause sounding of all the local alarm devices and the general ,or fire brigade alarm devices; to provide. a system which can be adjusted for. control ontesting purposes to select Serial No. 780,368.

either one or all of the local alarm devices and to exclude the general 'alarm.mechanism; to provide a system which can be adjusted for testing or drill purposes to cause response only of the general alarm devices and to silence all of the local. alarm devices; to provide such controlling mechanism and arrangement in the system that whenever afire alarm is sent in from any station while drill signals are being sent from any other station, the fire alarm signals will not be interfered with and the fire brigade will be accurately directed to the station from which the fire alarm signals are being sent; to provide such arrangement that whenever an alarm of fire is being sent from any station even though a selective drill signal is being sent from any other station, all the local alarm devices will give warning to the occupants of the building or premises; and in general to provide a system simple in mechanism and simple in cir- 'cuit arrangement and control, which is especially adapted curately and etiiciently call and direct the fire brigade and at the same time give ample warning to theoccupants throughout the building or premises to be protected.

Signaling systems for carrying out the general features of the system forming the subject of my present application, namely, to assure response at all times of the general alarm mechanism and toinsure sounding atall times of all the local alarm devices, have been heretofore proposed. In such systems, however, the signaling mechanism at each station was in the formof a non-interfercnce successive fire alarm box in which two sets of springs, one for controlling the general alarm mechanism circuit and the other for controlling the local alarm circuits, both form part of the noninterference mechanism of the box, from which it results that the succession feature of each box comes into play when such box is pulled for a fire alarm at a time when another box is set for selectively drilling the general or brigade alarm mechanism. The improvement of my present application is, however, particularly designed for utilizing non-successive signaling boxes at the various stations, as, for example, those known in the art as sector boxes, which are wound during the operation of pulling and which are capable of running for a limited number Specification of Letters Patent. p t t 1 ,19 3, Application filed May, 6, 1912, Serial No. 695,345. Renewed July 21, 1913.

for local protection to acof rounds only after such pulling. As in the previous systems referred to, two sets of circuit controlling cont-act mechanism are provided, one for controlling the general alarm mechanism circuit and the other for controlling the local alarm device circuit, but only the general alarm mechanism circuit controlling contacts have non-interfer enc'e control so that when one station has been pulled for selective drill of .the general alarm mechanism and another station is pulled for 'fire alarm, the response "'of the general alarm mechanism to the drilling station will not be interfered with, but the 5 fire alarm signals will be accurately sent from the fire alarm calling station to all the local alarm devices, so that the fire bri ade can be directed accurately and so that a l of the occupants will be warned.

The arrangement and operation of my improved system herein can be clearly understood by reference to the accompanying sheet of drawings on which is illustrated a system adapted to carry out the various features referred to.

At each of the various stations A B C, etc, of the building or premises to be covered, a local alarm device 9 is installed and at some central point general alarm or brigade calling mechanism G andcurrent sources S and S are installed. At each of the stations signal box mechanism is installed having referably sector 'drivin mechanism, the riving trainfor the signs wheel being-wound each time the tax pulled and when released being adapted to run to give the signal wheel a certain number of rounds and then to sto As indi cated, a pull lever a is connec with a sector gear 6 and a spring 0 is provided to be lwound when the sector is swung downwardly and to restore the sector when the pull lever is released. A suitable driving train with interposed ratchet mechanism connects between the sector gear and the signal wheel d, and transmits movement to the signal wheel only during return movement of the sector cam, this arrangement being so well known in the art that it is decided not to show it. Associated with the signal wheel rl are-two signaling levers e and f bo th pivoted at h and having the points z and 7', respectively, for engaging the signal wheel (Z to cooperate with the teeth and notches thereof. 8| Lever e has the stud k cooperating with contact springs Z and m and lever f has a stud n for cooperating with contact springs 0 and p.

A non-interferenceelectro-magnet E has an armature structure q pivoted at r and having -its'lower end s extending into the path of the pin ton the sector gear I) so that when this sector gear is in normal condition, the armature will be held in attracted .ition and when the sector gear is starte downwardly .upon winding of the springvthe ar- -first time. The spun at the various stations control the circuits 'the local alarm device 9 at the last'station,

mature will be released to be free to retract, a spring u tending to move the armature to retracted position. The armature lever car-- ries below its pivot point a pin U for coii'perating with the extended end of the signal ing lever e to move into position below this lever when this lever is raised and the ar mature structure retracted, or to be in front of the pin 1; when the. lever is down. In other words, the pin '21 and lever a cooperate during the running of the box so that the ar-- mature structure is free to retract (luring closures of springs Z and m by the lever 6, but is locked in attracted position by the lever e when the lever engages in notches of the signal wheel and the contact springs l and m are open, this being a well known noninterference arrangement in signaling boxes to prevent the signaling operation of one box from bein interfered with by any box on the same line. The lever f has, however, no non-interference association with the armature structure and is at all times free to cause opening and closure of the springs 0 and 1) during operation of the signal wheel. As shown, each box mustalso undergo a test period after being pulled and must run for a time longer than the longest closure in any signal before the circuits controlled by the springs l, m and o, p can be broken for the Z and m at the various stations control t e circuits for the gen-- eral alarm devices G and the Springs 0 and 7) for the local alarm devices 9. 6

At each of the stations suitable switch mechanism is provided for adjusting the circuit conditions for selecting the various alarm devices for response. As shown, at each station two switch arms 5 and 6 are provided and connected together for simultaneous operation by a bar 7. Switch arm 5 is adapted for connection with contacts 1, 2, 3, and 4 and switch arm 6 is ada mad for con nection with contacts 1, 2', 3 and 4. A conductor 8 connects the switch arm 5 at station A with one terminal of battery 5 and the conductor 9 connects the other terminal of this batterywith one terminal of in this case, station C. At each station the switch arm 5 connects through conductor 10 with the signaling spring I, the associated spring we connecting with one terminal of the associated electro-magnet E, the other termi= nal of each electro-magnet connecting through conductor 11 with the switch arm 5 of the next station, until the last station is reached where the conductor'lQ connects the. electro-magnet with one terminal of the battcrv S',-the other terminal of this 7 connecting through conductor, 8 and the general alarm mechanisms G 171 h-thooonductor 8. At station A the switch Inns 5 and 6 are connected together eon tion and 72 ductor l4 and are connected by conductor 15 with signaling spring 0, the associated spring 7) connecting through conductor 16 with the conductor 17 which connects one terminal of the local alarm device 9 with contact at at station A. The other terminal of each local alarm device connects through a conductor clearly understood. When the switch arms at the various stations are in engagement with thecontacts 1 and 1, respectively, the system is'in normal condition for fire alarm purposes-and the pulling of any box will resuit in response of all the local alarm devices and also the general alarm devices, so that the the brigade is called to the signaling station and all the occupants of the building or premises areduly warned by the sounding of all the local alarm devices. During such normal condition, we have the following closed circuit through the general alarm devices :from battery .5" through the general alarm devices G, conductors 8 and 10, signaling springs Z and m, and the electro-magnet E station E, thence through conductor 10,

springs Z and m and electro-magnet E at station '13, thence through conductor 10, spring/5'1 and m and electro-magnet at stathen through conductor 12 back to battery 8'. This general alarm circuitis therefore controlled by the opening and closure of the springs Z and m at any station at which the box mechanism is ing also pulled. Dursuch normal conditions of the system we have the following closed circuit through the local alarm devices g:from

battery S through conductors 8, 14 and 15 and springs 0 and 79 at station A and through conductor 16 and local alarm deviceg at said station; thence through con 'ductors 18 and 19 to station B and throughsprings o and p and the local alarm'device at said station, thence through the springs 0 and local alarm device at station C and then through conductor 9 back to battery S. This local alarm device circuit will therefore-be controlled by the springs 0 and p at any station at which the box mechanism is pulled.

To illustrate the operation of the system under normal conditions, suppose that at any of thestations, for example, station A,

the box mechanism is pulled for an alarm of fire, and that no other stations are operating at this time. The signal'wheelat station A --will open and closethe springs 1,410 and at station A, conductor 11 to given by 0, p, in accordance with the box signal, and the .box signal will be sounded on the general alarm device through the circuit before traced and will be sounded by all the local alarm devices through the circuit before traced. The 'fire brigade will therefore be called to station A and the local alarm devices at all the stations will give warning to all the occupants of the building or premises. If, after the box at station A has been pulled, the box at another station as, for example, station B, is pulled, station A will still retain full control 'of the general alarm mechanism, and such control cannot be interfered with by the operation of the box atstation B for the reason that when the box at station B is pulled, the testperiod must first be gone through and during this test period the general alarm mechanism circuit will be opened and the retracting armature at station B will lock the contact lever e at said station in raised position to keep contacts Z and m closed. At station A, however, the armaturewill be held in attracted position by the lever 6 when this lever is in its lower position to open the circuit at its springs Z and m. The armature at station B upon retracting will be out of attractive range of its electro-magnet so that the signaling lever 6 will be locked in its upper position and springs Z and m will be held closed until the sector gear 11 returns to its normal position and the pint on said gear engages end 8 of the armature structure to restore it to attracted position to thereby release the signaling lever e, and this will only be after the box at station A has fully concluded its operation and transmitted its full signal to the general alarm mechanism. However, as the signaling levers f are not under non-interference control, the springs 0 and p at station B will be opened and closed so that the local alarm circuit will be opened and closed by the springs as well as-by these corresponding springs at station A. All the local alarms will therefore respond but may not give station A signal. However, as the main pur pose of these local alarin devices is to warn the occupants,- such interference of signals on these local devices will not be of any consequence. The main purpose has been accomplished, namely to call the fire brigade to station A and to sound all the local alarm devices. Of course, as soon as the general alarm devices stop sounding the signal of stationA, the box at station B can again be pulled, if desired, and its alarm will then be the general'alarm devices and will be given accurately by'all of the local alarm devices. Thus when the system is in normal condition and one box ispulled before another, the box first pulled will control the a and, as soon as the box "he local devices the box last box signal on if, when the sys to together break the circuits time, the ho-i: rrst breaking closing the F all the contact and m at the ot er box will then in closed p on by their to re, but the springs l togeth-er control the local alarm devices and alarm devices will sound, almay not. give the signal oi 'tlhis non-interference arrangesiinultaneous starting of boxes, til rnderstood in the art.

' now to the abnormal condition l tent, as, when the system is to be 1 it ctive testing or drilling, sup; pose time at, one of the boxes say at tion. A--the switch. arms are moved into the second position into engagement with contacts 2 and 5/, respectively.v For such setting of the switch mechanisms, pulling of the box will result in silencing of the gencral alarm devices and I'QSPOIlSt: of all the l local alarm devicesto the signal of the box at station A. The silencing of the general alarm devices is controlled by a circuit closed therethrough when the switch nit-chic nisms are moved to second position. such setting of the switch mechanism causing the closure of a short circuit path about contact springs Z and m at station A by the conductor 20, the holding circuit being then, as fll0ws:-from battery S through the general alarm devices G, conductor 8, switch arm and contact :2 at station A, through short-circuiting conductor 20, through thei electro-magnet E at station A, then through i conductor ll to station B and through the springs Z and m and electro-magnet E at l l l l said station, thence through the springs Z and m and electromagnet at station C, and

then through conductor 12 back to battery C The springs Z and m at station A, al-

though opening and closing during opcra I tion of the signal wheel, are-ineffective and 3 the general alarm devices are silenced. but i the springs 0 and 7) will control thelocal l alarm circuitand all the local alarm devices 9 will sound the signal ofthe box at station A, the local alarm devices being all in cluded serially in circuit with the battery S. If, while the box at station A is operating to aelectively sound the local alarm devices, the box at station B, for example, is pulled for ,an alarm of fire, this box at station B willimmediately assume control of the nnlaliulann device mechanism circuit. his

l .ition two boxes are iiobvinuu for the reason that the springs ow/ones Z and m at station A, which normally by opening the general alarm circuit would prevent the box at station E from taking control of this circuit, are shorbcircuited and thus unable to open the circuit so that the clectro-magnet at station B will remain energized and its associated contacts I and m will remain operative to control the general alarm circuit, and the signal of box B will he sounded bv the general alarm mechanism and the fire brigade will be directed to station 13. The springs 0 and p at both boxes A and B will, however, be operating at the same time for a period, but the local alarm devices. although perhaps not correctly sounding the signal of either of the pulled 1', will, nevertheless, sound and warn the occupants. The fire alarm signal from station 15 thus takes precedence and the general alarm devices will sound the station ll signals and the signals cannot; in any wise be interfered with by the box running at station A. I

If the switch mechanism at any station as, for exam ne, station A, moved to third i by the short-circuiliing by conductor 20 at station, A of the signaling springsland m, and the silencing of the localalarm devices outside of station A is caused by the closure of a holding circuit, as follo\vs:from battery 5 through conductor conductor 14,- and switch arm (5 and contact 3. at'station the resistance a; .at station A, conduc tor 1!) to station ll, conductor 15 and springs o and p and the local alarm device at said station, then through conductors 18 and 15' to' station C and through the springs 0 and 7) and localalarm device at said station and then back through conductor 9 to battery At station A the resistance a: bridged by a circuit includin switch arm 6, conductor 15, springs 0 an p, and the local alarm devices g. Now, as the box at station A runs, the general alarm mechanism circuit remains closed, as the springs l and m are short-circuited,'and the circuit including the local alarm devices at stations.

B, C, etc., will remain closed and these local alarm devices will remain silent. At station A, however, the current shunted from this closed circuit about resistance 1' will be interrupted as the 5 rings 0 and 7) are opened and the local 3 arm device at station A will thereu on sound the signal of the station box. I ,now, while the box at station A is operating in the third position, the box at another station, saystatlon B, is pulled to sound an alarm of fire, this box will take immediate control of the general alarm mechanism circuit and such control cannot be interfered with by the operating has been mechanism at station A, and the general alarm mechanism will sound the signal of the box at station E and will dlrect the fire brigade to this station. The springs 0 and p at both stations A and B will, however,

together control the local alarm device circuit' alarm devices may of the box A'or B signals. they will, nevertheless, all sound to warn the occupants. If, while any box at any station has the switch mechanism set to the second tion, but the box is not pulled, and then the box atanother station is pulled, the box at this other station will of course control both the general and local alarm device circuits and the box signals will be given accurately on all the devices.

If it is desired to control only the tire brigade from any station, the switch mechanism at this station set to the fourth position into engagement with contacts 4 and 4. If this is done at station A for example, the contact springs Z and m at this station will be free to control the general alarm circuit and .to prevent interference with the general alarm other box. However. at station A, the switch arm' 6. together with conductors 13. 16 and 17 and contact 4:, will form a shortcircuit path aboutfthe springs 0 and 79 so that these springs lose control of the local alarm derice circult and this circuit remains closed during operation of the box at station A. If, while the box at station k'is operating under the fourth position setting, the box at another station, say station B, is pulled for an alarmof lire, this i box cannot take control of the general alarm mechanism circuit for the reason that this circuit is still controlled by. the springs Z and m. at station A, so that the non-interference mechanism is efiective and the signaling lever c at station B will be locked tohold its springs Z and m closed as soon as the circuit is broken'at station A While the 'lever e at station B is operating on the test tooth of thesignal wheel. However, the springs 0 and 7) at station A being shortcircuited and inoperative, the springs 0 and p at station B will assume control of the local alarm .device circuit. and the station B signalwill he sounded on all of these local alarm device's. Vvhen the box at station A was set in operation to send its signal through-thegeneral alarm mechanism circuit the fire brigade of course. responded and went to station A. The operator at station A knows, of course, that for a brigade drill the local alarm devices should not sound. and therefore immediately upon sounding, of the local alarm devices when the box at station B is pulled, the operator at station A will know that an alarm of fire for a period and though these local not clearly give either 5 or third posisignaling by any} and 2) sent in from station B and he will immediately direct the fire brigade to said sgiion. Thus the fire brigade will be accurately directed to the station sending in the fire alarm and all the local alarm devices will sound and will warn the occupants. and there is no interference in signals. If the box at station B had been pulled for fire alarm after the switch mechani m at station A had been set to the fourth position, but before the box at station A. had been pulled, then of course the box at \ltltlhll B would take control of the general alarm mechanism circuit. and the box B signal would be sounded on thegeneral alarm mechanisms and on all of the local alarm devices, and the box A would be entirely locked out if pulled after pulling of the box at station 13. Vhere the springs 0 at two boxes are operating at the same time to open and close the local alarm device circuit, the local alarm devices will re: spond to substantially all of the openings in the circuit by each set of springs if a, closed signal wheel is used, and the occppants will thus be thoroughly aroused.

I thus provide a very siniplesystem in which non-successive boxes can be effectively utilized and which system, though designed primarily for fire alarm purposes, can be adjusted for testing and drill purposes and in which system the arrange ment is such that an alarm of fire cannot be lost. nor can there be failure of all the local alarm devices to sound during a fire alarm, so that the fire brigade will, under all condit'ons, be accurately directed to the tire alarm sending station and all the occupants will be thoroughly alarmed; furthermore, such genera-l alarm signals can never be interfered with by other stations which are set for drilling or operating conditions or which are operating or set in operation after thus being set.

I do not, of course, desire to be limited to the precise construction and operation which I have shown and described, as changes and modifications are possible which would still come withinthe scope of the invention, and

I therefore claim the following:

1. In a signaling system, the combination of a general alarm circuit and a local alarm circuit, a plurality of stations, circuit controllers at each station in the general alarm and local alarm circuits respectively, a signal formulating mechanism at each station for operating both circuit controllers, and non-interference mechanism at each station for preventing interference between signals 'hen the signal formulating mechanisms at t a number of stations are operating at the same time, the general alarm circuit controls lers only being subject to the non-interference control of said mechanism, as set forth.

2. In a fire alarm system, the combination of a plurality of non-interference fire alarm signal boxes connected by two electric circuits with a central station,fthe signaling mechanism of each of said boxes including two circuit controllers, one in each circuit, means for operating the same to send a box number signal over each circuit, an alarm at the central station arranged in one of said circuits and subject to control of the non interference mechanism of each signal box, an alarm associated with each box arranged in the other of said circuits and independent of the control of said non-interference mech anism, and means at each local station for variably controlling the responsive action of the said alarm.

3. In a signaling system, the combination of a plurality of stations, each having signal formulating mechanism and local. alarm mechanism, general alarm mechanism, circuits for connecting said various mechanisms, switch mechanism at each station adapted to adjust the circuits to cause res onse of all the alarms or of the local a arms only upon actuation of the signal formulating mechanism, a non-interference electro-magnet' and mechanism associated therewith at each station for preventing interference between signals when the signal formulating mechanisms at a number of stations are operating at the same time, the said non-interference mechanism being connected with and adapted to exercise control over the circuit including the general alarm mechanism only.

4. In 'an alarm signaling system, the combination of a plurality of stations, a fire alarm signaling box of the anon-interfering non-successive type at each station, two sets of contacts and a signal wheel for actuating botli setsof contacts in each signal box, a main alarm circuit including in series the non-interference mechanism and one set of contacts controlled thereby at each station, a local alarm circuit including in series an alarm device and the other set of contacts at each station, said contacts bein independent of the control of the non-interference mechanism, as set forth.

5. In an alarm signaling system, the combination of a plurality of stations, a noninterfering non'successive fire alarm box at each station having two sets of circuit controlling contacts and one signal wheel for operating both, a general alarm circuit including in series the non-interference mechanisms and one set of circuit controlling contacts controlled thereby at each station, a local alarm device at each station, a local alarm circuit including in series said local alarm devices and a second set of circuit controlling contacts at each station, said contacts at each station acting independently of the non-interference mechanism at said station.

6. In a fire alarm signaling system, the combination of a plurality of stations, a general alarm circuit, a set of circuit controlling contacts at each station normally included in series in the general alarm circuit, a local alarm device at each station, a local alarm circuit including normally in series all the local alarm devices, a second set of circuit controllin contacts at each station normally include in the local alarm circuit, non-interference mechanism at each station including an electro-magnet, all of said magnets being connected in series with the, general alarm circuit, said non-interference mechanism being associated with the general alarm circuit controlling contacts, means at each station for preventing noninterference control of the general alarm circuit and means at each station for preventing control of the local alarm circuit from said station.

7. In an alarm signalin system, the combination of a plurality 0 stations, a signal box at each station. of the non-interfering non-successive type, a non-interference electro-magnet, two sets of circuit controlling contacts and a signal wheel for actuating the same in each box, a main alarm circuit including in series the non-interference magnets and one set of circuit controllin contacts of the several stations, the sai contacts being under the control of the noninterference magnet at each station, a local alarm device at each station, a local alarm circuit including said local alarm devices and the other set of contacts at each station normally in series, said local alarm circuit contacts being independent of the control of the non-interference magnets, as set forth.

8. In an alarm signaling system, the com bination of a plurality of stations, a fire alarm signaling box at each station of the noninterfering non-successive type, a noninterference electro-magnet, two sets of circuit controlling contacts and a signal wheel for actuating the contacts in each box, a main alarm circuit including in series the non-interference magnets and one set of circuit controlling contacts of the several stations, the said contacts being under the control of the non-interference magnets at each station, a local alarm device at each station,'a local alarm circuit including said local alarm devices and the other set of contacts at each station normally 111 series, said local alarm circuit contacts being independent of the control of the non-intcrfcrcnce magnets, and switch mechanism at each station for preventing the control of the main circuit contacts by the non-iuterference electro-magnets, as set forth.

9. In an alarm signaling system, the combination of a plurality of stations, a fire alarm signaling box of,the non-interfering magnet at each non-successive type at each station, a noninterference electro-magnet, two sets of circuit controlling contacts and a signal wheel for actuating the contacts in each box, a mainalarm circuit including in series the non-interference magnets and one set of circuit controlling contacts of the several stations, the said contacts being under the control of the non-interference station, a local alarm device at each station, a local alarm circuit including said local alarm devices and the other set of contacts ateach station normally in series, said local alarm circuit contacts being independent of the interference magnets,

and 'means at each station for shunting the main circuit contacts to thereby prevent the non-interference control by the electro-magnet at said station'of the main circuit.

10. In an alarm signaling system, the combination of a plurality of stations, a sig naling box of the non-interfering non-successive type at each station, two sets of circuit controlling contacts and a signal wheel for actuating both sets of contacts in each signal box, a main alarm circuit including in-series the non-interference magnet and one set of contacts controlled thereby at each station and also including general alarm mechanism and a source of current, a local alarm circuit including in series an alarm device and the other set of contacts at each station and also including a source of current, said last named contacts being independent of the control of the non-interference mechanism, means at each station for preventing non-interference control of the main alarm circuit and means at each station for preventing control of the local alarm circuit from said station.

1 In an alarm signaling system, the combination of a plurality of stations, a signaling box of the non-interfering non-successive type at each station, two sets of circuit controlling contacts and asignal wheel for actuating. both ,sets of contacts in each signal box, a main alarm circuit including in series the non-interference magnet and one set of contacts controlled thereby at each station and also including general alarm mechanism and a source of current, a local alarm circuit lncluding in series an alarm device and the other set of contacts at each station and also including a source of current, said last named contacts being independent of the control of the non-interference mechanism, and means at each station adapted to adjust the circuits to cause response of all the alarms or of the local alarms'only upon actuation of the signal wheel.

12. In an alarm signaling system, the combination of a plurality of stations, a signaling box of the non-interfering non-sue control of the non-' cessive type at each station, two sets of circuit controlling contacts and a signal Wheel for actuating both sets of contacts in each signal box, a main alarm circuit including in series the non-interference magnet and,

one set of contacts controlled thereby at each station and also including general alarm mechanism and a sourceof current,'a local alarm circuit including inseries an alarm device and the other set of contacts at each station and also including a source I of current, said last named contacts being independent of the control of the non-interference mechanism, and 'means at each station for variably controlling the responsive action of said alarms.

13. In an alarm signaling system, the combination of a plurality of stations, a signaling box of the non-interfering nonsuccessive type at each station, two sets of circuit controlling contacts and a signal wheel for actuating both sets of contacts in each signal box, a main alarm circuit including in series the non-interference magnet and one set of contacts controlled thereby at each station and also including general alarm mechanism and a source of current, and a local alarm circuit including in series an alarm device and the other set of contacts at each station and also including a source of current, said last named contacts being independent of the control of the non-interference mechanism.

14. In an alarm signaling system, the combination of a plurality of stations, two sets of circuit controllers at each station, signal formulating mechanism at each station for operating both of said sets, "a main alarm circuit including general'alarm mechanism and a source of current and serially including one set of circuit controllers and a non-interference electro-magnet at each station, said circuit controllers being under' the control of said electro-magnet, and a local alarm circuit including a source of current and serially including the other set of circuit controllers and local alarm mechanism at each station, said last named circuit controllers not being under the control of the electro-magnet.

15. In an alarm signalin system, the combination of a plurality0 s tations, two

sets of circuit controllers at each station,

at each station, "said last named circuit controllers not being under the control of the electro-ma et, and means at each station for variab y controlling the responsive action of said alarm mechanisms.

16. In an alarm signalin system, the combination of a plurality 0% stations, two sets of circuit controllers at each station, signal formulating mechanism at each station for operating both of said sets, a main alarm circuit including general alarm mechanism and a source of current and serially including one set of circuit controllers and a non-interference electro-magnet at each station, said circuit controllers" being under the control of said electro-magnet, a local alarm circuit including a source of current and seriall including the other set of circuit contro lers and local alarm mechanism at each station, said last named circuit controllers not being under the control of the electro'magnet, and means at each station adapted to adjust the circuits to cause res nse of all the alarm mechanisms or of e local alarm mechanism only upon actuation of the signal formulating mechanism.

17. In an alarm signaling system, the

when

tion for operating both of said sets, a main alarm circuit mcludlng general alarm mechanism and a source of current and serially lncluding one set of circuit controllers and a non-lnterference electro-magnet at each station, said circuit controllers being under the control of said electro magnet, a local alarm circuit including a source of current and serially including the other set of circuit, controllers and local alarm mechanism at each station, said last named circuit controllers not being under the control of the electro-magnet, means at each station for preventing non-interference control of the main alarm circuit and means at each station for preventing control of the local alarm circuit from said station. n

In Witness whereof, I hereunto sul scribe my name this 30th day of April A. I). 1912.

CLARENCE E. BEACH. \Vitnesses H. l. Homox, I). \V. Fos'rsn.

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