USRE12364E - Reissued june - Google Patents

Description

'REISSUED JUNE 20, 1905;

. WJH. KIRNAN. AUTOMATIC NON-INTERPERING REPBATER' FOB. FIRE ALARM menus.

Attorneys.

No. 12364.. REISSUED JUNE '20, 1905.

W. H. KIRNAN.

AUTOMATICNON-INTERFERING REPEATER PQR FIR KPYLIOATION TILED MAY 4. 1904.

E ALARM GIRGUITS.

. mmi-sum z.

"Witnessfesv I y 1 Attorneys.

REISS'UED JUNE 20, 1905.

' W. H. KIRNAN. AUTOMATIG- NON-INTERFERING REPEATBR FOR FIRE ALARM CIRCUITS.

APPLIOATION nun MAY 4. 1904.

5 SHEETS-SHEET 3k 38 Witnesses Attorneys;

No 12,364. REISSUED JUNE 20, 1905.

. W. H. KIRNAN. AUTOMATIC NON-INTERPERING RBPEATER FOB. FIRE ALARM CIRCUITS. 7

APPLICATION nun In 4. 1904.

' 5 snnn'xvsnnn'r 4 A ltor neys.

'REISSUED JUNE 20, 1905.

I 1 w. H. KIRNAN. AUTOMATIG NON-INTBRFBRING REPEATER FOR. FIRE ALARM CIRCUITS.

'APPLIOATION FILED MAY 4, 1904.

5 sums-sum 5 Witnesses UNITED STATES Reissued June 20, 1905.

PATENT OFFICE.

-WILLIAM H. KIRNAN, OF BAYONNE, NEW JERSEY, ASSIGNOR TO THE GAMEWELL FIRE ALARM TELEGRAPH COMPANY, on NEW YORK,

N.v Y., A CORPORATION OF NEW YORK.

AUTOMATIC NON-lNTERFERING Barnum FOR FIRE-ALARMIICIRCUITS.

SPECIFICATION forming part of Beissued Letters PatentNo. 12,364, dated -Iune 20,1905. I

' Original No. 249,327, dated January 12, 1904.. Application for reissue filed May 4, 1904. Serial No. 206,417.

To all whom it may concern:

Be it known that I, WILLIAM H. KIRNAN, a

' citizen of the United States, residing at Bayonne, in the county of Hudson and State of New Jersey, have invented a certain new and useful Improvement in Automatic Non-Interfering Repeaters for Fire-AlarmGircuits, of

' whichthe following is a description.

My invention relates to repeaters 'for firea-larm circuits; and my objects are to provide improvements therein by which interference-- in thetransmission of signals from different street-circuits is prevented and also to provide for improvements by which the disabling of one or more street-circuits will not prevent the effective operation of. the repeater from other street-circuits.

At the present time in the installation of firealarm apparatus the several street-oi rcu'its lead to a-so-called repeater, by means of which the signals are relayed or distributed over one ,or more'joker-circuits leading to the several engine-houses and also ordinarily to the main whistle or hell. The employment of non-interfering streetboxes prevents confusion on any particular street-circu it by the concurrent operation of more than one street-box in that circuit even if a number of street-boxes are pulled simultaneously and results in the successive transmission of signals to the repeater from the several boxes which have thus been operated. With repeaters as so far developed, however, no adequate provision has been made for 'theprevention of confusion in the trans mission of signalsover the joker-circuits when signals on a plurality of street-circuits interfere. My principal object, therefore, is to so. improve the construction and operation of repeaters that they shall possess all the attributes boxes may be received at the repeater at the same instant of time.

Ordinarily the street-c rcuits are normally closed on the repeater and the transmission of signals is veffected by successively breaking the street-circuits in the desired sequence. Since the non-interference mechanism which I prefer to employ is operated concurrently with the breaking of any one or more of the street-circuits, it will be obvious that a permanentdisabling of a street-circuit,-as by a.

a ground or break therein, would result in confusion in the operation of the other circuits.

A secondary object of the invention, therefore,

is to provide improvements by reason of which the disabling of any street-circuit will not affect the proper and non-interfering operation of the repeater from the other street-circuits.

In carrying the invention into effect Iemploy a repeaterhavin'g, preferablyythe ordinary joker transmitting apparatus and operate themechanism thereof bya mainoperating-magnet, which in the preferred instance is in a normally open local circuit. Eachstreetcircuit leads to'a street-magnet and'is preferv ably normally .closed. The release of the armature of any street-magnet by the breaking r of one of the street-circuitsoperates a circuitbreaker, which closes the local circuit on the main operating-magnet and results in the operation of the joker-transmitter, whichtherefore repeatsthe signal over the engine-house circuit of circuits. A number of non-interference magnets are employed corresponding with the street-magnets, and these non-interference magnets are preferably also located. in a normally open local circuit, wh ch, however, is mechanically closed at the commencement of the operation of the repeating apparams. The circuit'closing devices for closlillg the circuit to the main operating-magnet w n in their normal position close 8. corresponding series of breaks in the non-interference circuit, and these circuit-closing devices cooperate with the a'rmatu res of the non-interference magnets, whereby when such armatures 'are retracted the circuit-closing devices corj responding to the same will be locked against operation, while, on the other hand, when any oneof the circuit-closing devices is operated to close the circuit to the main operating-magnet the corresponding armature of the-non interferencemagnet will be held from moving to a retracted position.

chanical restoring devices for restoring the I make use of mearmatures of the street-magnets and non-interference magnets at the end of the operation of the repeating mechanism and for releasing such armatures at the commencement of that operation. With an apparatushaving these characteristics, the details of which will be more fully hereinafter described, interference in the operation of the repeater is absolutely prevented, while at the same time successive operation of relatively concurrent sigis automatically effected. v

In order that the invention may be better understood, attention is directed to the ac- V specification, 2O 1 companying drawings, forming part of this and in which a Figure 1 is a plan view of a well-known form of repeater with my present improvements applied thereto; Fig.2, a side elevation; Fig. 3, an end view; Fig. 4, a section on the line 4 4 of Fig. 1; Figs. 5 and 6, enlarged detail views illustrating one of theswitches and the parts immediately cooperating therewith in the normal and retracted positions 01" the armatu re of the corresponding street-magnet; Fig. 7, detail 'views illustrating one of 1 parts are represented by the same numerals rotation.

' mg a repeating-train.

the pins on the several street-magnet armature-levers and the hook with which it cooperates and showing 'the different positions of these parts in the operation of the device, and

Fig.8 a cuits.

In all of the above diagram illustrating the several-cirviews corresponding of reference.

The general constructionof repeaters of the typeshown inthe drawings is so well known that a detailed description and-illustration of the same are not necessary. The repeatercomprises an insulated cylinder 1, having contact-plates thereon engage with contact-springs2 in circuits 3 leading to the several engine-houses. All of these circuits will thereforebe simultaneously broken when the cylinder 1 makes acomplete able gearing from a weight 4, thus constitut- I ofthe cylinder 1 is an arm 5, provided on its lowerend with {a pin, which normally engages a stud 6 on an operating-lever 7. When this operating-lever is elevated, thearm 5 is released and rotates until the pin on its end engages a stud 8 on-the lever 7, again closing the circuits The return of the lever 7 to its normal position results in the rei 'sngageme nt of the pin on the lower end of the arm 5 with the stud 6, so that the parts once again occupy their normal positions. The lever 7 is carried on a shaft 9, tewhich an armature 10 is connected. 'lhis armature is attracted by the main operating-magnet 11. Obviously plurality of street-circuits nets are retracted by an which normally,

The cylinder 1 is driven bya suit- Carried on the shaft when the circuit to the magnetli is closed and broken the cylinder 1 of the repeating mechanism will make a complete rotation. The shaft of the cylinder 1 is provided with the usual cam 12 for operating a trip-lever 13, the latter being frictionally connected with a winding-drum 14, operated by a weight 15. When the trip-lever 13 is moved upwardly by the cam 12, it trips a drum 16, operated by a weight 17 and by means of an escapement (not shown) permits the said drum to make a half-rotation, thus constituting a .timing device. The trip-lever 13 is slowly returned toward-its normal position by the operation of the .weight 15, andwhen its normal position is reached the escapement mechanism for the drum 16 again operates and allows the latter to return to its normal position. Thedrum 16 is connected by' asuitable gearing with the shaft 18, which effects the release and restoration of the several armatures, to be presently described. The construction and operation of the repeater which I have so far briefly outlined are well known to those skilled in the art. Repeaters of this type are described and illustrated in patents to Rogers and'Crane, No.

223,248, of January 6, 1880; to Shelton, No. 596,250, of December 28,1897, and to Kirnan,

No. 650,358, of May 22, 1900, and differ from my repeater as so far described only in the single respect that with-the previous devices trip-lever 7 has been operated by a rock-shaft, (see, for example, the rock-shaft 10 and link 11 of the Kirnan patent last referred to,) whereas with my repeater the trip-lever is 0perated by the magnet 11.

Mounted on the base of the apparatus are street-magnets 19, one for each street-circuit, the latter being normally closed, as shown in Fig. 8. The armatures 20 of the street-magadjustable spring 21 \vhenany one of the street-magnets is deenergized, and their rearward movement is limited by a screw-stop 22. At the upper end of each armature-lever is a screw 23, which cooper- 1,10 ates with one-arm of a bell-crank 24, mounted on an insulating-block 25, carried on a rod 26,

extending across the street-magnets. The other arm of each bell-crank is provided'with a finger 27, which cooperates with a notch in the armature-lever of the corresponding noninterference magnet, as will be presently explained. Pivoted on the other side of each of the insulating-blocks 25 is a switch 28, nora mally engaging a contact 29, but adapted to 2 engage a contact 30 when the switch is moved downwardly to the position shown in Fig. 6 and in dotted lines, Fig. 4. 1n the embodiment of my invention illustratedthe armature, belt-crank, and switch, all actuated by 5 the street-magnet, constitute what I may call for lack of a better term a moving device, and this moving device is that which actually controls the re peating" mechanism. The characterof themovingdevicewilldepend upon the 3b type and d etails of -.theentire apparatus and I The moving device has an attracted and which in the embodiment and abnormal position, respectively, the normal positiombeing that which the moving devices assume when they are not receiving or repeatingasignal.

. This switch is provided with a slotted head, with which an insulated stud 31 l on the corresponding bell-crank 24 engages.

, 32,- which operates a lever 33 on a rock-shaft 34. Secured to this rock-shaft-are a number The restoring-shaft 18 carries the usual arm of arms 35, corresponding to the street-magnets and provided. with adjusting-screws 36,

- Fig. 4, which engage thearmature-leversofsaid magnets torestore the same when the restoring-shaft makes the second half of its rotation. As will be presently explained, this mechanicalrestoration of the armatures of the street-magnets, is. necessary in case one or more of the street-circuits become disabled.

A number of non-interference magnets 37, corresponding with the street-magnets, are

employed, one being located over each streetmagnet.. The armature-levers 38 of the noninterference -magnets are adapted to be re- -tracted by springs 39. Cooperatingwith each armature-lever 38 is an arm'4O on a rock= shaft '41, [arranged inthe normal position of the parts to hold the armaturesof" the noninterference magnets in contact with or closely adjacent to-zthe poles thereof. An arm 42 is secured 'to the rock-shaft 41 and is connected by a link, as shown, with an arm 43, loosely pivoted on thd rock-shaft 34 and operated by *a cam 44 on the restoring-shaft 18.- normally separated springs 45 46 are carried Apair of by an insulating-block, and the spring 46 is provided with an inclined or cam portion 47 with whichan insulating-pin 48 on the rockshaft 41 engages. The armature-lever 38 of each non-interference magnet is provided with a notch 49 in line with the finger 27 of the corresponding bell-crank 24. The parts are r so proportioned that when any armature-lever of a non-interference magnet is moved to a retracted position (see, dotted lines, Fig. 3)

.5 will' be projected through the notch to lock the finger 27 of thecorresponding bell-crank the particular-'bell-crank in question from movement by its spring 50. WVhen, however, any one of the bell-cranks is moved, (see Fig. 6 and dotted lines, Fig. 4,)the finger'27 thereof will act ass-stop for the armature-lever of the corresponding non-interference magnet and prevent the armature thereof'from being moved out'of the field of the particular noninterference magnet in question when the circuit thereto" is closed.

. The armature-lever of each street-magnet is provided near its upper end with a pin 51, which cooperates with a hook 52, carried at the end of an arm 53, pivoted toa stationary .vice is not in operation. 1

bracket 54. v A leaf-spring 55 engages the top of the arm 53 and holds it in itsnormal position. As shown in Fig. 7, the hook 52 overhangs the shank thereof,'so that the pin' 51 on theaorresfionding armature lever will when the armature-lever is retracted pass beneath the hook'Isee b, Fig. 7 to slightly elevate the pivoted arm 53, while upon the restoration of said armature-lever the pin rides up on the top of the hook (see 0, Fig. 7) to depress said arm. The parts are so adjusted that the restoring-shaft 18 moves the armature-levers only to a sufficient extent to engage the several pins 51 with the hooks 52 (see 61, Fig. 7 and does not move the armature-levers to their complete attracted position, (see a, Fig. 7,)in which the pins are brought'completely to the rear of said books. This latter movement of the armature-levers is eflected by the attraction of'the street-magnets themselves, and in the event of a break in the street-circuit the corresponding armature-lever will remain booked in an almost completely retracted position, as will be ob-. vious. In this positionnamely,with the pin 51 in engagement with the hook 52, as shown at d, Fig. 7 the switch 28 will be maintained in engagement with the upper contact-plate 29 therefor, so that notwithstanding the disabling of any street-circuit the street-magnet will not affect the non-interference circuit.

The preferable electrical connections are shown in..Fig. 8, in which for'the purpose of diagrammatic illustration the switches28 and bell-cranks 24 are shown as a single element.

cuits 56, each containing one or more streetboxes57. The main operating-magnet 11 is in a normally open local circuit 58, including a local battery 59, which local circuit is adapted to be closed at any one of the contacts by the operation of the corresponding switch 28. The severalnon-interference magnets 37 are connected in series in a, local circuit 60, which includes the contact-springs and 46 and the contacts 29, with which the switches 28 are normally in circuit. The local circuit for the non-interference magnets is normally broken at the springs 45 and 46. When, however, the repeating mechanism starts to operate, the circuit to the non -interference magnets will be closed, and the subsequent operation of the non-interference mechanism will therefore be the same as if a normally closed local circuit were used. By adopting this expedient I am therefore. enabled to operate the non-interference mechanism on a The street-magnets 19 are in closed street-cirpractically closed local circuit without, how,-

ever, draining the local battery when the de- Assuming a signal to be sent in over one of the street-circuits and without any interference from other street-circuits, the operation of the apparatus is as follows: When one of the street-circuits is broken, its armature-le ver is retracted by the spring 21 to the position shown in dotted lines, Fig. 4. This movement permits the spring 50 to operate the corre sponding bell-crank 24, which moves theswitch 28 into engagement with the contact-plate 30.

The local circuit 58 is thereforeclosed on they main operating-magnet 1 1 th rough the several levers 28 and contacts 29 attracting the armature 10, elevating the lever 7, releasing the arm 5, and permitting the circuitbreaking cylinder 1 to make almost aeomplete rotation,

. its normal position. Itach break in-the streetcireuit will result in a repetition of these op' erations to successively break and rei'sstablish the circuits 3 to the several engine-houses. The movement of the shaft of tie cylinder 1 operates the cam 12 to elevate .the trip-lever 13 to thereby trip the shaft 1.8 and permit it to make a l'lfllf-lOttllilOlL In this movement of the restoring-shatt 18 the cam 44 will be retracted from the arm 43 to release the rockshaft 41. As soon as this rock-shaft is released all of --the armature-levers of the noninterference magnets except that correspondmg to the street-magnet in operation will be retracted by thesprings 39 and moved to the n that the armature-lever of the non-interferen ce] position shown in dotted lines, Fig. 3, to engage the notches 49 over the fingers 27 and prevent the operation of the corresponding switches 28. In this position the armature-levers of the non-interference magnets are out of the influence of th ose magnets, so that a closing of the non-interference circuit will not affect the retracted armatures. It will be obvious magnet corresponding to the street-magnet in operation will not be retracted like the armature-levers of the other non-interference magnets, since the finger 27 of the street-magnet in operation will occupy the position shown in dotted lines, Fig. 4, to block the armaturelever of the non-interference magnet and prevent it from being retracted. The movement of the rock-shaft 41 referred to engages the insulating-linger 48 with thespring46to close the non-interference circuit at this point; but the non-interference circuit will be broken at the contact 29 of the street-magnet in operation, so that the armature-lever thereof is held from moving to a retracted position entirely.

by mechanical moans-namely, the engageincnt of the linger 27 therewith. When the street-circuit is again restored to attract the armature 20, moving the bell-crank 24 to its normal position again in line with the notch 49'of the non-interference magnet, the arma-- ture-levero'f the non-interference magnet in questionwill be still held in' an attracted position, sincethenon-interference circuit will be closed by the rengagement of the switch 28 with the -contaet-plate;29. I

. From what has been said it will be seen with respect to the armature-lever, of any one of the non-interference, magnets that said armature-lever" is during the operation of its particularstreet-magnet maintained in an at-' treated position, first mechanically and then i magnetically-i. e. when the street-magnet is deenergized to close the'local circuit'58, the armature-lever will be .mechanically held in an attracted position. by the engagement of the finger 27 therewith, and when the streetcircuit is closed to break the local circuit 58 by the movement ofthe switch 28 {from engagement with the contact 30 to the contact 29 the circuit 60 will be. closed through the switch 28 and contacts 29 to"energize all of the non-interference magnets to magnetically attract the armature-lever lnquestlon. Thus the armature-lever of the non-interference magnet corresponding to thestreet-mag'net in operation is prevented from interfering in any way with the operationofithe switch corresponding thereto to close the circuit 58 on the main operating magnet 11. In thecase of the other non-interferencemagnet however, their armatures being in the, position shown in dotted lines, Fig. 3, lock the bell-cranks 24 of all the other streetmmgnets, so that if asignal is transmitted over any Otherstreetcircuit except that'which cornmencedto first operate it results, onlyin the movement of the armature-levers without efl'ectingamovement of the corresponding switches to actuate the magnet 11, controlling the operation of the repeater. in this way by arranging the parts so that the operation of any one of the armatures of .the street magnets will 'lbe'imm'evdiately followedbya retractiod-of the arma-' ture-levers of :the non-interference magnets for all the other street-magnetstof' thereby lock the switches controlled hy'such other street-magnets to prevent the latter from controlling the repeating? mechanism If efl'ectively preventinterference, aswill be evident,

it being understood, of course, that the armature-lever of the non-interferenoemagnet for the street-magnet inoperation'isheld mechanically and electrically in anattracted position, so as'not to interfere with the operation'ot' the switch 28 for the particular magnet in question, as explained. nal has been sent in the trip-lever 13 will regain its normal position to trip the shaft IS and allow the latter to make a half-rotation to regain its normal position. In' this movement the arm 32 engages with the' lever 33 and moves itin the directiomof the magnets to move the armatures almost to their com- After the sigplete attracted position'or, in other words, to

move thearmatures to the position where thepin 51 engages over the book 52. (See 02, Fig. 7 The shaft 18 completes its half movement, which will cause the arm 32 to swing past the end of the lever 33, permitting it to shaft 41, returning the, retracted armature-le- Vers of the non-interference magnets to their attracted position and holding them in that position (see Fig. 3) ready for a new operation. also draws the finger 48 from the spring 46 to break the non-interference circuit at that point. l

My improved non-interference mechanism is so perfect in its operation: that it prevents interference between signals received on different street-circuits, even when'the first signal is'recelved simultaneously on a number of circuits. This Wlll be understood from a consideration ofthe diagram shown in Fig. 8, in

which'the signal transmitted over thefstreetcircuit at the right is i two-three and that over the street circuit at the left is "threetwo)? The wheels of the boxes of both of these circuits having the same number of makes and breaks in each revolution will turn at the same speed. Assuming that these two boxes are pulled simultaneously, the corresponding street-magnets will be'simultaneously deenergized, releasing both a!- mature-levers and closing the circuit 58 at each magnet. The fingers 27 for both of these magnets will engage in front of the armaturelevers of two corresponding non-interference magnets, and said non-interference Imagnets will therefore be prevented from disabling the two street-magnets in operation. The movement of the switches 2-8 will break the non-interference circuit 60, and the armatures lever of the central non-interference magnet will therefore move to its retracted position to lock the street-magnet, as shown in dotted lines in the middle of Fig. 8, to disable the same. In sending the second signal over the two outside street-circuits both of the magnets will operate simultaneously and neither will be disabled by its non-interference magnet. The third signal is received only on the lefthand street-circuit and results in demagnetizing the corresponding street-mag net 19, so as to'break the non-interference circuit 60 between the contact 29 and the switch28 therefor. Owing to the prolonged interval between the second and third breaks .of the right-handv street-circuit, that circuit will remain open while the circuit on the left-hand side is being broken to send the third break of the'three signal on that side. The street-magnet on the left-hand side will therefore be energized before the street- This movement of the rock-shaft 41 magnet on the right-hand side is and the leftband armature will be the first attracted. This will cause the switch 28 to resume the position shown on the left of Fig. 8; but the non-interference circuit 60 being broken the ward to the position shown in broken linesto non-interference armature 38 will drop downthe leftof that figure, thus causing the'finger attracted, thus completing the circuit 58 and repeating this signal. The switch 28 will be moved from the position shown in dotted The circuit 58 be- 27 to engage below thenotch in the non-in--- that side will be energized, and its armature.

lines to that shown in full lines to the right of circuitGO at that point and energizing all of Fig. 8,'thus completing the non-interference the non-interference magnets '37, which-will prevent side from being retracted and will not lock the armature 38 on the right-hand" the switch 28 on that side, it being understood v f that the switch 28 will engage with the contact 29 before thefinger 27 reachesthe notch 49. All of the other non-interference arma tures will be in the retracted position shown in dotted lines and will be too far removed from their magnets to be affected thereby on the completion of thecircuit 60. The street I magnet '19 on the right-hand side will therefore continue to be energized and deenergized until the complete signal has been sent. Consequently the further signals will be trans,- mitted by the street-magnet at therlght and no interference from the otherswill be per-' mitted. whenevertwo signals are received at the same time on morethan oneof'v the street-magnets all of the street-magnets receiving the signal will operate in unison, all the others being dis abled. As soon, however, as oneof thestreet- In this wayit will beobvious that magnets receives thesignal in advanceof the others it will be disabled and the one last receiving the signal will continue to operate un-v it becomes possible to effectively operate the device without interference, even when a portion of the signals are received at the same instant by a plurality of the street-magnets.

ti-l its entire signal hasbeen received. Thus.

' 1n the event ofone of the street-circuits becoming disabled, as by a break orground therein, it will be seen that unless such a contingency were provided for the release of the corresponding street-magnet armature would send a single impulse over the circuits 3 and permit the switch 28 thereof to remain in engagement with the contact-plate 30 to thereby l keep the circuit 58 closed on the magnet 11.

' move the pin 51 from the position shown at .I as

street-magnets,

- pin into en Fig. .7) to I break'ingthecircuit5 -in the event of one coming disabled af operated the controlling magnet 11 its armawill then remain infthat the magnets of the othe -alarmcircuits', 3

' except that of the street-magnet first receiva signal .and prevent any other street-magnet from controlling the repeating mechanism,

and means actuated by the operation of the repeating mechanism for closing the non-interference circuit, substantially as and for the purposes set forth.

4. In a non-interference repeater for fire-' alarm circuits,the combination with repeating mechanism, of a plurality of street-magnets, a switch operated byeach street-'magnetcontrolling the repeating mechanism, a plurality of non-interference magnets, and armatul'elevers for the non-interference magnets cooperating with said switches, the said arma-' tare-levers having slotstherein, substantially as and for the purposes set forth.

' 5. Ina non-interference repeater for firealarm circuits, the combination with repeating mechanism, of a plurality of switches con trolling the same, corresponding street-magnets actuated by said switches, a normally opencircuit embracing non-interference magnets corresponding with thestreet-magnets, means controlledby the non-interference magnets for disabiing the switches of all the streetmagnets except the first street-magnet to op- This would obviously prevent the other street:

magnets from affecting that circuit. By providing the street-magnet'armatures with pins 51, cooperating with hooks 52, as explained, thisdifficulty is overcome,,sin,ce the operation of 'the-restoring-shaft 18 will carry the gagementwith the hook (see (i, hold the switch of the magnet in question in engagement with the contact 29, Satthe contact30f Thus of the street-circuits beter'its magnet 19 has once ture will be restored, until its pin 51 engages the corresponding hook 52, and the armature position, sees not to interfere in any way with the operation of r' street-circuits. As soon' as the disabled street-circuit has been, repaired and the circuit is once again closed its street-magnet w'ill attract its armature and a d, Fig. 7 to thenormal retracted position,'as. shown at a, Fig. 7. v

Having now described my invention, what i I claim as new, and desire to secure by Letters Patent,is as follows: i

1. In anon-interference repeater for fireth'e'combination with repeating mechanism and a plurality of-street-magnets 1 controlling the same, ofa normally open circuit embracing non-interference magnets corresponding with the street-magnets, means, controlled by the non-interference magnets for preventing the operation of the repeating mechanism by any one of the street-magnets while under the control of any other of the street-magnets, and means actuated by the operation of the repeating mechanism for 0105- ing the non-interference circuit, substantially as and for the purposes set forth. g 2. In a non-interference repeater for-flre.

alarm circuits, the combination with repeating mechanism forv closing the circuit including the non-interference magnets, substantially as and for the purposes set forth.

' 6. In a non-interference repeater for firemechanism, of a plurality of switches controlling the same, a street-magnet for each switch, a non -interference magnet for each street terference magnet having a cut-away portion thereincooperating with the respective switch therefor, and means controlled by the repeating. mechanism for permitting the armaturelevers of the non-interference magnets to move the purposes set forth.

mechanism, ofa plurality of switches control I ling the same, a corresponding. number of alarm circuits, the combinationwith repeating street-magnets for actuating said switches, a mechanism, of a plurality of switches control normally open circuit embracing non interling the same, a street-magnet for each switch,

ferencemagnetscorrespondingwiththestreeta non-interference magnet for each street-' magnets, means controlled by the non-intermagnet, an armature-lever for each non- 1nference magnets for. disabling the switches terl'erence magnet havlng a cut-away portion 1 therein cooperating with the respective switch therefor, means controlled by the repeating mechanism for permitting the armature-levers of the non-interference magnets to-move to a retracted position, and means operated by the, repeating mechanism for closing the, non-interference circuit, substantially as and for the purposes set, forth.

8. Ina non-interference repeater for firealarm circuits, the combination with repeating mechanism, of a plurality of street-magnets controlling the same, a normally open circuit embracing non-interference magnets corresponding with the street-magnets, means controlled by the repeating mechanism and coing a signal, and means actuated by the operation of the repeating mechanism for closing the non-interference circuit, substantially as and for the purposes set forth.

3. In a non-interference repeater for firealarm circuits, the combination with repeating mechanism, of a plurality of street-magnets, operating-switches for controlling said mechanism, anormally open circuit embracing n0n-, interference magnets corresponding with the means controlled by each of the street-magnets. for operating the non-interference magnets to disable the switches except that of the street-magnet first receiving ,erate, and-means controlled by the repeating alarm circuits, the combination with repeating magnet, an armature-lever for each non-into a retracted position, su bstantially as and for i In a non-interference repeater for fireoperating with the non-interference magnets for disabling all the street-magnets except that immediately controlling the repeating mechanism, and means actuated by the operation of the repeatingmechanism for closing the for the purposes set forth.

9. In a nominterference repeater for firealarm circuits, the combination with repeating mechanism, of a street-magnet, a switch controlling the repeating mechanism, connections between said switch and the armature of the streetmagn'et, a non interference magnet, and an armature therefor having a slot therein adapted to engage with said switch, substantially as and for the purposes set forth.

10. In a non-interference repeater for firealarm circuits, the combination with repeating mechanism, of a street-magnet, a switch controlling the repeating mechanism, connections between said switch and the armature of the street-magnet, a non-interference magnet, an armature therefor having a slot therein adapted to engage with said switch, and means controlled by the repeating mechanism for me-. chanically releasing said armature, substantially as and for the purposes set forth. a

11. In a non-interference repeater for finealarm circuits, the combination with repeating mechanism, of a street-magnet, a switch controlling the repeating mechanism, connections between said' switch and the armature of the street-magnet, a non-interference magnet, an armature therefor having a slot therein adapttrolled by the repeating mechanism for mechanlcall y releasing said armature, and means to the non-interference. magnet concurrently with the operation of'the repeating mechanism, substantially as and for the purposes set forth.

12. In a non-interference repeater for firealarm circuits, the combination with repeating mechanism, of a street-magnet, a switch controlling the repeating mechanism, con nections between said switch and the armature of the street-magnet, a non-interference magnet, an armature therefor having a slot therein ad apted to engage with said switch, means controlled by the repeating mechanism for mechanically releasing said armature, means operated by the switch for closing thecircuit to with the operation of the repeating mechanism, and a secondary circuit-closing device in the non-interference circuit controlled by the repeating mechanism, substantially as and for the purposes set forth.

13. In a non-interference repeater for firealarm circuits, the combination with repeating mechanism and a restoring shaft operated thereby, of a street-magnet, a switch operated by the street-magnet for efiecting the operation of the repeating mechanism, a non-internon-interference circuit, substantially as and I ed to engage with said-switch, means con operated by the switch for closing the circuit the non interference magnet concurrently vference magnet, an armature-lever therefor having a slot therein adaptedto engage withsaid switch, and connections between the restoring-shaft and the armature-lever of the non-interference magnet for mechanically releasing said armature-lever concurrentlywith the operation of the repeating mechanism, sub stantially as and for the purposes set fortln 14. In a non-interference repeater forfirealarm circuits, the combination with repeating mechanism and a restoring-shaft operated thereby, of a street-magnet, a switchoperated by the'street nagnet for effecting the operation of the repeating mechanism, a non-interference magnet, an armature-lever therefor having a slot therein adapted to engage with said switch, connections between the restor- I ing-shaft and the armature-lever'of the noninterference magnet for mechanically releaslngsald armature-lever concurrently with the operation of the repeatlng mechanism,a switch A in the non-interference circuit, and conneca;

tions between said switch and restoring-shaft for closing the non-interference circuit, substantially as and for the purposes set forth.

15., In a non-interference repeater for firealarm circuits, the combination with repeating mechanism, of a street-magnet, an armature therefor, a bell-crank actuated by said armature, a switch operated by the bell-crank for controlling the repeating mechanism, and a non-interference magnet and armature cooperating with the bell-crank, substantially as and for the purposes set forth. 16; In a non-interference repeater for firealarm circuits, the combination withrepeating mechanism, of a street-magnetcontrolling the same, an armature for said street-magnet, a

pin on said armature, a hook for receiving the pin when the armature-is partially attracted,

and means controlled by tln iepcating mech- I anism for mechanically engagl gsaid pin with said hook, substantially as andfor the purposes set forth. a

17. In a non-interference repeater for firealarm circuits, the combination with a series of street-circuits each embracing a magnet and a moving device which controlsmcans for repeating the signal, a lock for each moving device, the lock being controlled by that moving device which is in the retracted position after a plurality of the moving devices have been simultaneously operated and have ceased to move in unison, to lock out and row der inoperative all of the other moving 1h vices, whereby the signal of the circuitin con trol will be continued to be sent without mntilation, substantially as and for the purposes set forth.

18. In a non-interference repeater for lirealarm circuits, the combination with n. series of street-circuits, each embracing a magnet and a moving device whichcontrols m m-is for repeating the signal, a lock for each moving device, the lock being controlled by that moving device which is in the abnormal positionafter a plurality of the moving devices have been simultaneously operated and have ceased to move in unison, to lock out and render inoperative all of the other moving devices, whereby the signal of the circuit in control will be continued to be sent Without mutilation, substantially as and for the purposes set forth.

19. ha non-interference repeater for firealarm circuits, the combination with a repeating-train and a plurality of streetcircuits, each embracing a magnet and a moving device actuated thereby, means actuated by any one of the moving devices for Starting the repeating-train, means controlled by that moving device which is in retracted position after a plurality of the moving devices have been simultaneously operated and have ceased to move in unison, to prevent action of the other moving devices on the repeating-train, whereby the signal of the circuit in control will becontinued to be sent Without mutilation, substantially as and for the purposes set forth.

20. In a non-interference repeater for firealarm circuits, the combination with a repeating-train, and a plurality-of street-circuits, each embracing a magnet and a moving device actuated thereby, means controlled by anyone of the moving devices for starting the repeating-train, a lock for each moving device, the lock being controlled by one of the moving devices when a plurality of the moving devices have been simultaneously operated. and cease to move in unison, to lock out and render inoperative all of the moving devices except the one which first gets control,

ble of movement from an operative to an inoperative position and vice versa, and by such movement actuating therepeating mechanism and the timing device, a locking-out device for each moving device, means for bringing the locking-out devices into actionby the movement of a moving device from the inoperative to the operative position, when a plurality of such movingdevices have been simultaneously operated and cease to operate in unison. which moving device will control all of the other locking-out devices and lock out all of such moving devices as are in the inoperative position and prevent movement of these moving devices so long as the timing device is operating, substantially as and for the purposes set forth.

This specification executed the 30th day of April, 1904:. v

WILLIAM H. KIRNAN. ,VVitnesses:

CHAS, WV. CORNELL,

L. E. LOWRY.

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