US1547420A - Combined signaling and alarm system - Google Patents

Description

July 28, 1925.

. 1,547,420. A. s. KEATING COMBINED SIGNALING. AND ALARM SYSTEM Filed Deo. 19. 1919 5 Sheets-Sheet 2 @214% www I lNvENToR ZID/70H30 3. Heading ATTORNEY Patented July 28, 1925.

ALPHoNso s; VKEATING,l oF conny', PENNSYLVANIA. A

COMBINED SIGNALNG AND ALARM SYSTEM.

Applicationl filed December 19,l 1919. Serial No. 346,038.

To all whom t may concern.'

Beit known that I, ALPHoNso S. KEAT- ING, a citizen ofthe United States, residing at Corry, in the county of Erie and St-ate of Pennsylvania, have invented certain new and useful improvements in a Combined Signaling andAlarm System, of which the following is a specification.

This invention has relation to telegraphic and telephonie dispatching systems andA apf paratus, aswell ask signaling and electric alarm systems, andI has for an object to pro# vide asystem including apparatus and wiring connection therefor designed for military use. f i c Another object of the Vinvention is to-pro'- vide av 'system and apparatus of the character above set forth embodyingmeans.` for silently transmitting and receiving amesin the Morse or other code. v

Another object of theinvention. is topprovidea combinedapparatus for the silent transmission and reception of messagesin telegraphic code, .and for thetransinission and reception of oral messages byfmeans o f the same apparatus. n Y

Another object of theinvention is to providea system of the character above set forth embodying a combination of said devices whereby messages maygbe transmitted and received in telegraphic code, either audibly or silently, and where messages may be transmitted and received audibly through the medium of telephonie apparatus.

A still further object of the invention is to provide improved transmitting and receiving devices designed particularlyk for use in connection with other apparatus of my system and designed particularly to meet'the conditions to be imposed thereupon in practice.

A still further object of the invention vis to proie/ide in a dispatching and alarm sys.- tem, devices to be located lat each end of the line whereby to actuate a signal when the lines are tampered with or severed.

A still further Vobject of the invention is to provide a time controlled mechanism in a combined dispatching and alarm system whereby the operation of the alarm mechanism mentioned above is placed in circuit during certain periods of the day, and the apparatus thrown out of circuit during the remainder ofthe period Avstill further object ofthe invention is to provide anaudible signal andlocal'circuit therefor, in a combined dispatching and ralarm system having the characteristics above set forth, for insuring the constant operation of the signal when actuation thereof is initiated. y

A still further object of the invention is to provide means: in'fa combined dispatching and alarm system whereby the use of eitherclosed-circuit battery, such as gravity cell, a' storage battery, or a dynamo source of energy, maybe employed, orin place thereof, an openfcircuit element such as a dry cell may be employed without :detriment to the dry cell from polarization" in the use thereof. f

A still further object` of the 'inventionis toy provide a by-,pass circuit in a combined dispatching and alarmV system, whereby should the mainlines-'become crossed accidently, or otherwise crossed, the'by-pass cir,- cuit would serve to complete a main line circuit, in which case, both the mainl lines, though crossed would form'but one side of the main line circuit, the earth, in combination with the station wiring of the invention, theother side of the circuit.

' ln addition tothe foregoing my invention comprehends improvements in the details of construction and arrangementv of the parts to be hereinafter more fully described and particularly set forth in the appended claims. l

The drawings illustrate a preferred em.- bodiment of the invention. However, it is to be understood that in adapting the same to meet different conditions, various changes in the form, proportion, and minor details of construction may be resorted to without departing from the nature of the invention as claimed hereinafter.

In the accompanyingdrawings in which similar and corresponding parts are designated by the same characters of reference throughout the several views in which they appear Figure l is a `diagrammatic view illus,- trating the wiringV connection between; the various elements ofmy apparatus and setting forth the relation between two stations.

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`Figure 2 is a detail view inside elevation illustrating the telegraphic receiving apparatus closely associated with the Y switch -mechanism for controlling the operation thereof.- Y Y ,r

Figure 3 is a View in front elevation of the apparatus shown in thef immediately preceding figure.

Figure Lis a view inA plan of my improved telegraph key for use in connection with my apparatus. j

Figure 5 is a side view of the telegraph key bar with contact points and adjustment screws.

Figure 6 is a view in side elevation on an enlarged scale of the circuit closing apparatus designed to be actuated when the lines are tampered with or severed, and

Figure 7 is a view in front elevation of the time controlled circuit closing mechanism.

With reference to Fig. 1 of the drawings, A and B indicate connected stations. The

v parts of each are duplicated, hence like a base board supported by an arm 11 pivot j ed at 12 to a standard 13 of aV desk set. Mounted upon the outer face.. of the 'base board is a base plate 14 designed to carry the apparatus. At the upper end of the base plate is-an anvil bracket 15 of the type usually provided in connection with tele* graphic receiving' apparatus. A second bracket 16 is located a distance below the anvil bracket 15 and is provided with oppositely disposed adjustment screws 17 for pivotally supporting a vibrating bar 18 which has one end mounted between said screws 17 and the opposite end extended toward the anvil bracket 15 and provided with an adjustment screw a designed lto coact with an `adjustment screw 'b of the anvil bracket 15 to limit movement of said vibrating bar 18 in the usualmanner. Mounted upon the base plate 14- between the brackets 15 and 16 is a pair of electro-magnets 19. An armature 20 carried by the bar 18 is adapted to'be attracted by the electro-inagnets 19. The armature 2O is preferably in the form of a fiat ring of a suflicient diam eter to be brought into proximity to' the poles of both magnets 19 simultaneously.'

To the end of the vibrating bar 18, adjacent its point of pivotal mounting. is connected an extending' hook 21 to the end of which is connected one endof a coil spring 22, the opposite end ofl said coil spring` 22 extending toward the anvil bracket 415 and bcing connected to a threaded rod 23 which `is loosely mounted in said bracket and which has an adjustment nut at each end to en-f gage the bracket, whereby the tension of the spring 22 `may be varied.` j

Connected to the lower bracket 16 is a strip of metal whichrhas its lower end bent towards the base to form an arm 24 and its upper end bent outward to form an arm 25. The intermediate portion of said strip attached to the bracket 16 is electrically insulated therefrom. A casing 26 is carried by the arm 25 and `preferably forms a part thereof. rllhe casing 26 is a part of the telephonic transmitter and is preferably of metal, being threaded externally to receive a cap 27. Located within the casing 26 is a second circular casing, or cup'28, formed of which vis placed a carbon block 29 secured thereto by means of ascrew 30 which '85 serves to prevent contact of the diaphragm 38 and carbon spheres 32 With the casing 28.

To the rear end of the'screw 3() there is se-` cured a conducting strip 84. The lower end of the stripf is secured betweeny the bracket 16 and the strip attached thereto forming the `arms 2a- `and 25 and is insulated therefrom. The strip 34 connects electrically with the outer end of a flat spring contact of material of said casing 26 and of which Y casing the cup'forms a part, in the bottom j finger 35 whichlikewise is held or clamped between 'said bracket 16 `and part 24-25,

contact finger 35 being insulated from bracket 16. The contact finger 35 extends towards the base 10, its Vrear end tending-to spring downward. Pivotally mounted upon the lower end of the arm 24 is a telephone receiver hook 36, which is formed with an upper projection 87 and a downward projection 38. These projections 37 and 38 are disposed above and below the pivot support of the receiver hook. A projectionV 39 eX- tends forwardly from the pivot end of the receiver hook `and is normally engaged by a'spring finger 40. rigidly secured to theintermediate portion ofthe strip `forming the arms 24 and 25. The spring ,L10 acts to nor- `mally urge the outer end of the `receiver hook in an upward direction. The outer end of the receiver hook is depressed against the tension of the spring 40 `by the weight of the receiver 11 suspended therefrom. The projection 37 of thereceiver hook bears against the under side of the fiat spring ufinger 35 to normally retain the same in engagement with contact member `42 mounted upon the plate 14 but electrically insulated LAS transmitter in station B, through rod 87', Contact 89 and wire 65'. The said main line 66 may be considered as extending `from its contact with the transmitter casing 26 through the same, the diaphragm 88, carbon spheres 32, carbon block 29, contact strip 84, Hat spring contact finger 85, terminating in the free end of said contact finger. It may also be considered as extending from its contact with said casing 26 through the said casing, the arms and 24 and the receiver hook 36 in which it terminates. The main line 66, thus diverges into two branches, alike in both the stations A and B. When the metal branch path, including the trans mitter casing 26, the arms 25 and 24 and the receiver hook 86, is brought with its terminal 37 in contact with the free end of the contact finger by means of suspending the telephone receiver 41 on the receiver hook 36 or by means of the contact finger 35 in its downward tendency, mentioned above, making contact with its free end with said contact point 37 of hook, the two branches are united and form dual paths of the main line circuit, one of which forms the telephone transmitter carbon element path. The other forms the metallic shunt path to said carbon element path. The circuit thus ends in corresponding points at both stations A and B. Such points may be considered as the equivalent of movable switch arms to direct the main line circuit through the telegraphic part of the circuit, or througha telephone receiver circuit. These circuits will be described in detail hereinafter after the parts with which they associate have been described.

The lower contact member 43 is connected by means of a conductor 67 to one terminal of the coil 49 of the telephone receiver. The other terminal of the coil 49 is connected by means of a conductor 81 to a two-way switch 73. The contact points 71 and 72 are provided to co-operate with switch 7 3, to either of which said switch may be brought into engagement. The contact points 71 and 72 are connected by means of a. conductor 74, having a battery 75 interposed therein. The cont-act linger 44 is connected by means of a conductor 68 to the conductor 81. The contact member 42, designed to be normally engaged by Contact linger 35 and contact point 37 of the receiver hook 86, is connected by means of a conductor 70 to one terminal of the electro-magnet 19 of the telegraphic receiver. The binding post 56 is connected by means of a conductor 76 through a. switch 101 and contact point 102 to the main line 77. The binding post 57, of the key is connected by means of conductor 78 to the conductor 74, adjacent the contact 72, and to the contact clip c through the conductor 45'. The electro-magnet 19, of the telegraphic receiving apparatus, has a terminal of its helix or winding connectedby means of a conductor 79 tothe conductor 74. Thenpost 58 or' the key is connected by means of a conductor 80 to the conductor 79. It will be noted that the main leads 66 and 77 connect at each end with the elements described above through the medium of circuit closers, the detail construction of which will be described later. These connections completely associated the parts of each station for op# eration in a manner which will now be described.

To transmit a message telegraphically through the medium of the conventional telegraph key and receiving apparatus from station A to station B with the main line circuit arranged for closed-circuit battery use, that is, with the stop pin 60 removed, the switch 62 is closed on the contact clip c, the conductor 80 opened, and `the switch 78 is placed on contact point 71. The circuit thus formed is alike in both stations A and The switch 62 in the sending station A is now opened, and operation of the key bar 54 to send a message results in the formation of a circuit which may be traced as follows: from the (now closed circuit) battery 75 through conductor 78, post 57, wire 45'; contact 55, key 54, key frame 51, conductor 76, switch 101, contact point 102, rod 86, main lead 77, through said conductor 77 to station B, entering station B through rod 86' to contact 102 from which4 point the circuit takes its course through switch101', conductor 76', the post 56' on the telegraph key vin station B, base 51', switch 62', clip c', conductor 45', post 57', conductor 78', closed circuit battery75", conductors 74' and 79', electro-magnet 19', conductor 70', point 42', dual paths mentioned above, to conductor 65', through rod 87', returning through the main line 66 to station A; entering the station A through rod 87 to the conductor 65 thereof, thence through dualpaths, contact point 42, conductor 70 to the electro-magnets 19, thence through the conductors 79 `and 74, through battery 7 5 to conductor 78,

the point from which the circuit started. The electro-magnets 19 and 19'` of both stations A and B will thus be energized to render audible the telegraph signal formed by the telegraph key or" station A.

To transmit a message telegraphically through the medium of conventional telegraph key and receiving apparatus :trom station A to station B, with the main line arranged for use of open-circuit battery, with the stop pin 60 in place on the key, the switch 62 closed on the contact clip a2- on post 58, the conductor 80 connecting the post 58 with the conductor 79, the switch 7 8 on contact point 72, an open-circuit dry cell being substituted for the closed-circuit gravity cell and dead-ending at both clip c and contact point 55, and through switch 7 3 .cuit may and points 43 and 44 normally alike in both stations A. and B, the switch 62 in the sending station A being open, operation of the key bar 54 to transmit the message, the cirbe traced as 'follows .From :the dry cell, y7 5, through conductor 78, .post 57, conductor 45, contact point 55, key bar 54, key base 51, post 56, conductor 76, switch 101, contact point-102, rod 86, main lead 77 to station B, entering station B through rod 86' to contact 102", switch 101', conductor 76', post 56', key base 51', switch 62", clip -c2'-, on post- 58', conductors v80' and 79', electro-magnet 19', conductor contact point 42'. dual paths, conductor 65', rod 87', returning through the mainline 66 to station A entering station A through rod 87 to conductor 65, thence through the dual paths,-contact point 42, conductor `70, electro-magnets 19 and conductor 79. 'As the path' through theconductor 80 is now open owing to ythe switch 62 beingopen -in vthe sending station A, the

- circuit flows through conductor 7 4,y dry battery yto conductor 7 8, the point from which he circuit started. The electro-magnets r9 and 19 of both stations A and B will thus be energized to render audible vthe `telegraph signal formed by the telegraph key instation A. When usingan open-circuit dry cell, the circuit formed to transmit `the message telegraphically,differs trom that of the closed-'circuit cell, lin that. the "circuit 'does not pass through the open circuit dry battery 75' in station B, but through the conductor the dry battery of the sending station A operating the main line circuit and the instruments therein. However, should the operator at the receiving stat-ion B open his switch 62 and hold key 'lever 54 depressed on contact point 55`the battery ot said station kB will be introduced into the circuit 'with its accompanying benefit. lt is optional with the operator of the receiving station to do so or not.` The keys 62 are closed normally and the main line circuit is metallic including no battery, the dry cells, in both stations, standing open at their respective contact points.

To send call by means/of the receiver hook 36, it does not matter whether the main line circuit is arranged for use of closed-circuit battery, or for the use of the open circuit dry cell, the manner is, simply, to remove the telephone receiver from the receiver hook 36. In the upward movement of the receiver hook 'the contact point 38 of said hook is causedtoV wipe over the contact finger44 establishing the main line circuit through the battery 75. The momentary contact ot point 38 with the point 44 of .the contactiinger causes an electrical ini-pulse to be sent over the main line through the apparatus in the distant station causing the said instrument to respond audibly to such impulse. .In the riemoval of the receiver from the receiver hook, the contact point 37 of said hook, in conjunction with the contact linger 3 5, opens the main line circuit, and the path through the electro-magnets 19, at point 42, in. its upwardv movement. It, however, rcestablishes the main circuit during the wiping process ot the point 38 over the part 44, as above described In the openingot the main line circuit, at point 42, byreinoving the receiver 'from the hook 36, free end of contact finger 35 retains contact with point 37 of the receiver hook, in its passage over and during the wiping contact of point 38 with point .44, Vdue to the downward spring tendency of flat spring Contact finger 35. Thus the metallic path and shunt is preserved across the carbon element, contact finger path, not only during the wiping process but during the normal contact of hook and contact linger at point 42. Owing to this feature, the dual paths ot the main line circuit may be considered as non-resistant fto kthe passage or' thecurrent in the main line circuit. y

vI-nsending vthe call by means of the receiver hook, the main line circuit beingvarranged 'for the `@se of closed-circuit` battery, that is,rwith the conductor 80.0pen

at post 58, or said conductor removed entirely, the stop pin-160 is removed to allow the switch arm 62 to make contactwith the contact clip c. Though. the hook-formation part y64 of said switch 462 makes contact with clip -azit is not in effect, as the path is opened by the removal of the conductor 80. With the switch 73 on contact point 71, the path ci the circuit may be traced asiellows: 4' l f li'rom the point of wiping contact 44, through conductor 68, conductor 81, switch 7 3 on contact point 71, conductor 74, the

route through the magnet 19 being open atV contact member 42, ythe circuit takes its course through the battery 75, conductor 78, post 57, conductor 45, clip c, .switch arm 62, key base 51, post 56, conductor 76, switch 101 to contact point 102. From point 102 of .station A, the circuit `flows through the rod 86, mainline 77 to station B, entering station B, through. rod 86' to contact point 102 from which Apoint the circuit takes its way through switch 101' conductor 76' to Vpost 56', on telegraph key,

thence through the key base 51', switch arm 62', clip 0', conductor 45',z,post 57', conductor 78', battery 75', (as the route through switch 72', on point 71', is open at the contact points 43'` and 44', and, as thetelephone receiver is on the receiver hook, in this station .and the main line, thereby closed at point 42'), the circuit takes its course through the conductor 74', conductor79' electro-magnets 19", conductor 70',

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contact member 42' dual paths` to conductor through rod 87 to, main line 66 returning through the main lineV conductor 66 to station A, entering station A through the rod 87 to the conductor 65 thence through the dual paths Contact point 38 of hook in wiping contact with contact finger 44 the point trom which the circuit started. The electromagnet 19' of station B'will thus be energized to render audible the call .signal formed by the receiver hook in station A. /Vhile the calling signal is automatic-ally sent in removing the receiver from the hook, itmay be repeated manually in the passing and re-passing of the contact point 38 of vreceiver-hook over contact lmember It is to be noted, that in the calling circuit both'the closedcircuit battery of Station A and the station B are included in the main line circuit; also, that the Vmagnets 19' only, of station B Vare included in the said circuit, the terminal of the magnets 191ot station A being'dead-ended in contact member 42;

In sending the call by means of the receiver" hook, the main line circuit being arranged for the use of open circuit bat# tery, that is, with the `conductor80 connecting post 58 with conductor 79:,the` stop pin 60 in place allowing the hooked end 74 of switch 62 to `make contact with Vcontact clip -a2- butpreventing Contact of the arm `of said switch 62 with the contact clip c andthereby Idead-ending the open-circuit battery 75 at said clip c, and the contact point 55 being in contact with said clip and with the switch`73 nOw on contact point 72, the circuit maybe traced as follows: Y

From the point of wiping contact 44,.

through conductor 68, conductor 81, Switch 73, contact point 72, conductor 74, to battery 75, (as conductor A78 tapping the conductor 74 adjacent the contact point 72, is dead-ended at its other end in contact clip c and contact point 55,) the circuit takes its course through battery 75, conductor 74, to the intersection of conductor 74 with the conductors 80 and 7 9. As the path through the conductor 79, electromagnet 19V and conductor is ope-n in the contact member 42), the circuit takes its course through the conductor 80, post 58, clip -c-,lthe hook portion 64 "of switch 62, the base 51 of the telegraph key, post 56, conductorV 76, switch 101, contact point 102, thence through the rod 86, main line conductor 77, from station A to the station B, entering the station B through rod 86 to 'contact point 102 from which point the circuit takesV its course through switch 101', conductor 76', post 56, key base 51',switch 62', and hooked 4portion 64' thereof, through the clip -a2"- conductor 80', (as conductor 74' through battery 7 5 is open at point o' and`55), the

circuit takes its course through the conductor 79', electromagnets`19, conductor 70',con tact member 42', dual paths to conductor 65', returning through main line, conductor 66 to lstation A, entering station A through rod 87, the conductor 65 from whence the circuit takes its course through said conductor 65 and the dual paths to their common junction at point 38 in wiping contact with the contact finger 44, the point from` which the circuit started. The electro-mag-` net 19'in the receiving station B will thus be energized to render audible Vthe call signall formed by the receiver hook in the station A. It is to be noted, in this case, in the use of the open4circuit battery, that vthe battery of the callingstation A, only operates the main line circuit and the magnets 19' therein ofV station B, thatvthe electromagnet 19 of the station A stands with its end open in the contact member 42, as in the case ot use with the closed circuit cell.

In sending the callby means of thereceiver hook 36,` as the contact point 38 of said hook leaves its wiping contact, the contact finger 44, the contact'point 43 engages the point ofcontact finger 35 preventing its further advancement downward, the contact point 38, however, continues onward to the extent of the upward movement of the receiver hook,`thereby the'main line circuit is formed through the carbon element contact ingerpath, the contact member 43, conductor 67, the magnet` coil 49-of the telen phone receiver, conductor 81 to the 'switch 73. The shunt formed across the carbon element contact finger path is automatically opened, when the contactV point 3710i? the receiver hook, (the terminal of the shunt path), severs contact with the contact finger in the further advancement upward of receiver hook, the shunt path standing deadended in the Contact point 37 of the receiver hook. This circuit, with the main line circuit arranged for use of closed-circuit `loat- `tery, and which circuit designates the telephonecircuit, may be considered as well, the telegraphic silent call and messagecircuit'. It may be traced as follows: Starting from point of contact of contact finger 35 with contact member 43, the circuit takes its course through the conductor 67, magnet Acoil 49, of receiver, conductor 81, switch 73,

the operator in station B receiving lthe call the winding of the magnet coil 49 ot the telephonereceiver is included in the circuit just described, the resistance thereof in the circuit would so reduce the strength of the current flowing in said circuit that it would not be strong suiiiciently to magnetize the magnets 19', in station B so as they would attract the armature 20 as to cause it to give forth anaudible signal.

However, should the operator be at `the station B, expecting to receive a call, he would have removed his receiver from the receiver hook .and placed it in position with its receiving end exposed to emit the signal, which in this case, would be given by the diaphragm 33', of the telephone receiver. Therefore, the path of the circuit from the battery 75' in station B would not be through the conductor 74', and magnets 19 to conductor 65', but through the switch 7 3' on contact point 71', conductor 81', magnet coil 49' of the receiver, conductor 67', contact point 43', Contact finger-carbon element path of the transmitter to the conductor 65'.

The circuit being thus established, the dia-i phragm 33 of the telephone receiver in the station B, likewisethe diaphragm of the receiverin station A, will cause to be set upA a low toned signal in answerto the signal formed by the telegraph key in the station A. Such' low tones of thecallsignal being heard bythe operator at his station. And, with the receivers to their ears,the operators will receive the message only transmitted by the keyot station A. y i

With the circuit arranged for the use lot the open circuit dry battery,in sending the call orrmessage by use of the telegraph key, telegraphically and in a manner silently, the telegraph keyvis first opened and the receiver then Aremoved from the receiver hook for reason explained above in relation to the use ot closed-circuit. j

W'hen the telegraph key in station A is used, the pathkof the circuit may be traced as follows: Jfrom the contact point ot the telegraph key, through the key bar 54, key

base `51, post` 56, conductor 76, switch 101, contact point 102, rod 86 to main line con# ductor 77 to station B, the circuit entering station B through rod 86 to contact point 102 to switch 101 through conductor 76', post 56', key base 51', the curved end 64', of switch 62', (the arm of switch 62' being out of contact at clip 0') the circuit takes the course through contact clip a2'-, post 58', conductor 80 to junction with conductor 7 '-79'. Should the operator in station B be not at his station, (as the path through conductor 74' and battery 75' will be open t at contact points clip c' and contact 55 of the key, also through switch 73 on contact point 72', at points 43' and 44',) the circuit takes its course through conductor 79 `magnet coil 19', conductor 70', contact member 42', dual paths to conductor 65', returning through conductor 66 to station A, entering station A through rod 87, conductorv 65,

casing 26, 'member 35, contact member 43,V through conductor 67, receiver coil 49 (as the conductor 68 is open in the contact point 44) the circuit takes its way through conductor 81, switch 7 3 on contact point 72 (as the circuit through the battery 75, conductor 74, through conductor 79,1nagnets19, conductor 70 to contact point`42, or through conductor to contact clip a2), switch 62 being open, the paths dead end in their respective contact point 42 and a2, the circuit takes its course through conductor 78, post 57, conductor 45 to contact point `55V the point trom whichthe circuit started.

Should the operator in station B be eX- pecting a call and be at his instrument, he

member 42' in the removal ofthe receiver), c

the circuit would take its course from the point of junction of conductor 80', through conductor` 74', y, battery 75 (as the path through conductor` 78"-45 `is open and dead-ended at clip 0" and contact point 55', theoperatorin station B havingclosed his switch 62' on clip CW-4,) thecircuit conj tinues through switch 73', contact point72', conductor 81'.` As the conductor 68'` tappingconductor 81' is open and` dead-ended in contact linger 44', the circuit takes the course through 'the magnet coil 49',V the telephone receiver, "conductor 67', contact tngerfcarbon element path through transmitter casing 26' to conductor 65'. The main line circuitgthus, being established through this part of the circuit,1the diaphragm 46' of the telephone receiver in the station A,

will be' caused to set up a low-toned signal in answer to the signal formed ,by the telegraph key in the station A, such low signals` givenby the diaphragm being heard, only by the operator in the stations when near their respective instrument. With the telephone receiver to the ear, the operator only will receive the telegraphic message transmitted by the key in station A, Y To receive the silent message with the use of the open circuit battery, it becomes obligatory on the part of the operator at the receiving station that he close his switch 62'. To depress his key while the operator at the sending station is oscillating his key lever 54, would be, to be depriving the line circuit of battery current to operate line circuit. The receiving station supplies the current Jfor the line when its switch 62' is closed.

L contact point 102 is a second Obviously, these messages can be transmitted by means of a telegraph key from the station B to station A and received at the station A by means of the telephone receiver' by a repetition of the circuits traced above.

For ordinary telephone communications, where the messages are transmitted orally, the call to attract attention of the operator at the distant station may be transmitted by simply removing the telephone receiver from the receiver hook. Both the calling circuit and the talking ycircuit is formed automatically in the upper movement of the receiver liookas described above. No further change is made, as in the opening, or in the closing of switches whatever in the form of the circuit used.

The coil 50 on the saine bar 48 with the coil 49, the terminals of the coil 50 being simply twisted together is used as an auxiliary to the transmission teleplionically. I have described above the formation of an inductive circuit in relation to this coil 50.

Attention is next directed to a protective circuit which applies directly to the circuit formed for the transmission of either tele graphic or telephonie transmission. A twoway switch 101, the free end of which rests on a contact point 102 is provided. Attention to such switch and point in the conductor 76 has been called thereto in descriptions given in the circuits hereinbefore described and in which the conduct-or 7 6 and switch 101 formed a part. Adjacent the contact pointl 108. To the contact point`108 is connected one end of a conductor 129, the other terminal of said conductor connecting with a contact point on which rests the free end of a common switch 130, the pivoted end of the switch connecting with the earth through a conductor at point e. l

Thus it will be seen that the elements of the system are so associated electrically, one with the other, as to permit messages to be transmitted telegraphically in the ordinary way, that is with the userof a loud receiver, or silently by use of the telephone receiver, the audible signals of which are not sufficiently loud to be heard by anyone except the operator, and by the use of the telephonie transmitter and -receiver for transmitting voice currents in the usual way.

Attention is next directed to the circuit closers operable to initiate actuation of alarm mechanism when the line wires 66 and 77 are tampered with or severed. 1t will be noted with reference to Fig. 1, that a circuit closing apparatus is interposed betWeen the terminals of the line wires and the apparatus just described. Since the circuit closer at each end of the line is a duplicate in construction to the other, a description of one will suflice for both. Therefore, with reference to Fig. 1, 85 indicates a base board per lower brackets 88 and 89, respectively. The.

lower bracket 89 of rod 87, is connected to the conductor 65, while the bracket 89 of the rod 86 is connected to the `conductor 76, and

said conductors and 76 are thus estab-` lished in communication with the lines 66 and 7 7 through the medium of the said rods 86 and 87. f

Mounted in contiguous .relation to each of said rods 86 and 87 is a contact strip 90. The terminals of the strips are bent towards the respective rods, and each rod is provided with a pair of collars 91. Each collar has a projection extending towards the strip and each projection is provided with a' ,contact point, designed for engagement `with a contact point on the bent end terminals of the strip 90, but normally held out of engagement when the collars on the rods are in in-y termediate position. Each main line 66 and 77 passes at its terminal over a pulley 92 and each of said line wires is' connected at a point beyond the pulley withy a flexible brace 98 securely anchored at its ends. A

coil spring 94 is connected at one end to eachl end of the line wires 66 and 77 at the point of their connection to the braces 93 so as to retain said line under strain at all'times. Each rod 86 and 87 is furthermore provided with a collar 95 having opposed arms, and

acoil spring 96 is connected at one end to each of said arms and its opposite end to a' bracket f mounted upon the board whereby to urge the rods 86 and 87 downward and to retain the contact point of collars 91 normally out of engagement with the strips 90. A contact strip tiguous relation to the rod 87 with the terminals of said strip 97 bent towards the rod and provided with contact points designed for contact with contact points of either one of the collars 91 of the rod 87. In

the case of the rod 87 the collars 91 are designed for simultaneous engagement with the adjacent ends of Vthe parts and 97. The strips 97 are in electrical communication with the upper bracket 88 of the rod 86 by means of a conductor 98.` The strips 90 are electrically connected by means of the end of a conductor 99 which branches, ad`

jacent these strips for connection to both,

97 is mounted in conone of the branches being designated by the reference figure 98E, the other being continued as the end of conductor 99.

lt will be seen that if line conductor 66 vis tampered with, the rod 86 will move upward so as to engage collar 91 thereof against the terminal On the other hand contact point of strip 90.

be severed, the

should the main line 66 the contact point of the up- ILO springs will act to move the rod 86 downward so as to engage the contact pointV the main line conductor 77 be severed the spring 96 will `act to move the rod 87 downward so as to engage the contact points of the lower collar 91 thereof against the lower terminal contact points of both strips 90 and 97 simultaneously. VBy providing electrically operable alarm mechanism and associating the same with the contact `strip 90 of the respective rods 86 and 87 and the strip 97 and 87, it will be `seen that the alarm may i' be caused to sound, or be actuated when the line wires are either tampered with or totally severed.'

I have illustrated in connection with this type of circuit closer a specific arrangement of signaling apparatusshown more in detail in Fig. 7. The alarm-and signaling mechan-ism includes an e ectric bell, a battery, an annunciator and a time controlled circuit closer. The annunciator may be of the conventional type including an electro-magnet and a dropshutter which are included within the illustration shown in Fig. 1 and indicated at 100. The same elements are located at each endof the `main line, that is, they are located `iln `a conductor 105, one end of which tapsthemain line circuit at the point of junction of Vmain line 66 and 65wvith the main line .77-66, the said line having electric relation with what may be considered the ends lof these respective main line circuits "66 and 77. The other end of said conductor 105 ends in a contact point 118 adjacent the free end of" a two-way switch 131 which rests on an idle contact point in station A, the pivoted end of said switch 131 connecting with `the earth through a conductor at point g, `the switch 131 resting on the contact point 118 in the station B. Thus, it will be understood that the considered ends of the main line conductors 66 and 77 dead-end in the idle contact point in the station A, which station `may be considered the one to be protected and said considered ends of main line conductors 66 and 77, in the station B, connect with the earth' through the switch 131. The station B maybe considered the station to receive the alarm signal when the conductor 105 is automatically brought in contact with the i earth by means exterior to that of the switch 131 in the station A, and which means will be described later. The object of the switch` 131 in statirn A and switch 131 in station A is'simply to transpose the relation of stations A and B. ldlhile in the present illustration, Fig. 1, the free endof the switch 131 is shown resting onthe `idle contactA point in station A designating it to be the station protected and the free end of the switch 131 resting on )contact point 118 of the conductor 105. in station B designating itthe alarm receiving station. To transpose the said` switches as to their'contactl points in both the stations would cause the station A to now become the alarm receiving. station and the station B the one protected.

Such transposition becoming necessary at times when station B', which would Vbe the residence station, would become unoccupied,` and the station A, the store station to.` be protected, would become occupied'. It isV not to be taken that thestation `B is not protected from entry, means exterior to ,thel circuit of the main line is provided to 4protectthat station and will also be described ater. y

It will be `noted that when the alarm, cir.-l cuit is formed, the earth forms one side of said circuit andv the main line conductors 66 and 77, considered as oneconductor, form the other side of the said circuit.` It is j moreover pointed out that crosses accidentally, or otherwise placedacross these eX-4 terior conductors 66 and 77 would in no wise effect an alarm signal sent over the alarm circuit. The electric bell 106 includes an armature It which connects by means of aconductor 123,` with the `conductor 105 below the magnet coils ofthe bell 106. Associated with said armature is a 4contact point whichffconnects by means of a conductor 1211 with said conductor 105 ata point above the magnet coils of bell 106. Then a current is caused vto flow through the main line alarm circuit through the magnet windings of bell 106,"thecores of said magnetsbecome magnetized and` attract the `armature 71;, which` armature, in turn makes contact with the contact point of conductor 124, thereby establishing a shunt circuit across the magnet windings of said bell, through which the current nowV takes its way to the demagnetization ofthe said magnet cores. In consequence, `the armature returns to first position again open-` ing the shunt and in place to again-be attracted. So long as the current of themain line flows through the magnet windings, ythe armature will vibrate andcause the bell 106 to sound. A detent in insulated relation to the armature, but connected thereto engages the free end of a drop arm 126, the pivoted end of said arm connects by means of a conductor 128 with the conductor 105 above the magnet coils of bell 106, a conducico alarm circuit has been discontinued.

tor 127, provided with a contact point, connects below the battery 116a with saidv conductor 105, designated 116. `When a current ot electricity iscaused to flow through the main line alarm circuit throughthe magnets of bell-106 causing them to attract the armature z, the detent 125 thereof is raised thereby disengaging the tree end of arm 126 which falls and engages the contact point of cone ductor 127, thereby forming a local circuit which includes the bell 106 and the battery 116% The local circuit thus established, the bell 106 therein continues to sound, even though the main line alarm circuit through theJ magnet coils of said bell is opened and discontinued. To stop the ringing of bellv 106 it becomes necessary to restore the drop arm 126 to the upright normal position engaging the detent 125 after the main 'llipe ie restoring is performed manually.

A conductor 99, at the upper end of which a branch thereof connects with the strip 90 adjacent the rod 86, and which is tapped by the conductor 98, taps with its lower end, the conductor 105, designated 116 at a point below Athe battery 116th The conductor 99, together with that portion of the conductor 105 which includes battery 116a i and the electric bell 106, and connected thereto, the rod 86 and in association therewith, the rod 87, through means of the cont-act points 90 and 97, and the conductors 98 and 98a, `forms a local circuit which is adapted to be closed by means of the contact points of collars 91, of rods 86 and 87, when the main line 66 or 77 is tampered with or severed.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a combined telegraphic and telephonic system, the combination with the main line, of a telegraphic receiver, a telcgraphic transmitter, a circuit connecting said elements to the main line, and a second circuit including a` telephonic transmitter, a telephonic receiver, and a switch for connecting said circuit to the main line, and

for connecting the telegraphic transmitter into the telephonic circuit and cutting out the telegraphic receiver.

2. In a combined telegraphic and telephonic system, provided with a plurality of stations, each station including a circuit including a telegraphic transmitter and a telegraphic receiver in circuit with the main lines, a second circuit including` a telephonic transmitter and a telephonic receiver, a source of current for energizing said cire cuits, a receiver supporting switch to normally disconnect the telephonic circuit from the main line, said switch when opera-ted connesting said telephonic circuit to the main lines, and a third circuit including a contact under control or" the receiver supporting cuit including a telephonic transmitter and receiver, a source ot current for energizing said circuits, a pair of spaced contacts, one contact being in the telegraphic circuit and the other in the telephonic circuit, a linger movable therebetween, a telephonic receiver C supporting switch arm engaging, when supporting the receiver the finger to retain the same in engagement with the contact of the telegraphic circuit, the receiver hook when raised permitting the ingerto engage the other contact to throw the telephonic circuit into communication with the transmitter of the telegraphicV circuit, and a. third circuit including a contact tinger engageable by they receiver hook during upward movement thereof to intermittently energize the transmitter of the telegraphic cir cuit to actuate the telegraphic receiver at the next station.

1. In a combined telegraph and telephone instrument, a base plate, electro-magnets mounted thereon, a bracket at one side of said magnet, an anvil bracket on the other side, a vibrating arm pivoted at one end upon the first bracket, and having its other end movable in the anvil bracket, an annular armature carried by said arm attractable by the magnets, spring means for normally retaining t-he arm away from the magnet, a strip secured at its intermediate portion to the first bracket and having its terminals extended in opposite directions, a telephonic transmitter mounted upon one terminal, a switch lever pivotally mounted on the other terminal, atelephonic receiver, carried by the outer end of said switch lever, projections on said switch arm, a pair of spaced contacts mounted on the base plate, a spring iinger mounted in insulated relation upon the rst bracket having its terminal movable between the contacts, a projection on the switch arm to engage the finger to normally retain the finger in engagement with one contact, the second contact being intermittently engaged by the remaining projection on the switch lever and electrical connections between the telephonic transmitter and telephonic receiver forming circuits controlled by the movement ot the switch arm.

5. A combined telegraph and telephone instrument including a base plate, a telegraphic receiver mounted thereon including a bracket tor supporting the vibrating arm,

a strip secured at its intermediate portion to4 said bracket, a pair of blocks. of insulation interposed between sai-d strip and said bracket, said strip having its terminals eX- tended in opposite directions, a telephonic transmitter mounted on onel terminal of said strip in electrical communication therewith, a conducting strip having one terminal secured to `one of the terminals of the telephonie transmitter and its other endl;` intel` posed between the blocks of insulation, a

s rino' iinoer havino one termi-nal secured' b b b 2U of .spaced contacts, ,one `at each side of the first ment-imied spring finger, a projection on the switch arm towengage said` first men-` tioned finge-r to retain the same invengage ment with one of the contacts, a thimd con.u tact finger moimtedf yon fthe ibase .plate andi in insulated relation thereto, and. a second projection on the switch. arm to: momentanily` engagewthe thind spring finger Ydairifng .up-

ward movement of the switch arm and elec-` trical connections between the telegraphic recoivent-151e telephonie transmitter and the telephonie receiver and iormingcireuifts con-- trol-led by the` movements Lof said switch arm.

In testimony whereof I affix my signature in. presence of two witnesses.. i

ALPHONSO S. KEATING. llitnesses: l i Y JQP. DROWIN, H. A. FRANK.

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