US1114565A - Electric burglar-alarm system. - Google Patents

Description

J. P. WILLIAMS. ELECTRIC BURGLAR- ALARM SYSTEM.

APPLIGATION FILED JUEE 1, 1910.

Patented 001;. 20 1914.

a ATTORNEY.

ltl

UNITED STATES PfILFENT OFFICE.

JOHN PRITCHARD WILLIAMS, OF NEW YbRK, N. Y., ASSIGNOR TO ELECTRIC BANK PROTECTION COMPANY, A CORPORATION OF DELAWARE.

ELECTRIC BURGLAR-ALABM SYSTEM.

Specification of Letters Patent.

Patented Oct. 20, 191 4.

To all whom 1' 6 may concern Be it known that I. Jon) I. humans, a citizen of the United States, and resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Electric Burglar- Alarm Systems, of which the following is a specification.

This invention relates to electric burglaralarm systems, and it has particular relation to improved means whereby access to the guarded structure will be permitted to authorized persons without sounding the alarm, and to other protective features comprised in the operative status of such systems, substantially as hereinafter described.

A time mechanism of the eha 'acter above set forth is shown in the patent to M. F. Juruiek, Serial No. 944,733, granted December 28, 1909.

Considerable disadvantage and risk attend the employment of controlling time mechanisms inclosed within the guarded structure and in connection with the electrical protective alarm system thereof, for governing! the operative and inoperative status of the system, as under such conditions the protective operative status and convenient employment of the system has a dependency upon the perfect and regular operation of a clerk work mecha ism or automatically-operatlug time device which in its nature is liable to disall'angement or operative disorder.

A leading object of my present invention and improvements is to overcome the conditions above mentioned and obviate the employment of controlling time mechanism for throwing off the alarm to permit access to the guarded structure or for governing the operative and inope ative status of the alarm system, and to provide simple and improved means of certain and positive operative characteristics by which the operative status of the alarm circuits can be definitely and conveniently governed to permit authorized access at any time to the guarded structure.

A further object of my present invention and llTlplOYCIDQIltS is to provide a general burglar-alarm system which will possess advantages in point of simplicity, effectiveness. positive operation, convenience, and general e ficiency, substantially as hereinafter set forth andparticularly pointed out in the claims.

Reference is had to the accompanying drawings, which show in diagrammatic representation the main parts of a 'burglaralarm system embodying my improvements.

The type of burglar-alarm systems to which my improvements particularly relate involve primarily a guarded structure or main structure protected by the burglaralarm system. The guarded structure, as herein referred to, may be the vault, safe, or other structure which it is desired to protect in a bank or other building or apartment, or the building or apartment itself or a part thereof. The guarded structure is provided with a door or other means of access thereto, and electrically protected by the system in such manner that an attempt to gain entrance thereto will cause the actuation of an alarm. In connection with such burglawalarm systems, the subject-matter of my present invention has particular relation to the means for permitting authorized access to the main guarded structure at any desired time and withoutactuating the alarm or disturbing the general operative protective status of the alarm system.

To this end, the main subject-matter of my present invention comprises eleetro-mechanical interlocking combination devices, which in their relative arrangement and construction and circuit connections enable the governing of the s stem so as to permit authorized access to tie guarded structure without actuating the alarm or disarranging the operative conditions of the system.

Referring to the drawings, 1 designates a combination lock device, which in its general features of construction and operation of parts may be of the usual well-known types which are employed upon the doors of vaults, safes and other structures. Such combination lock devices employ a lurality of tumblers, which are herein in icated at 2, the diagrammatic illustration of said tumblers .2 being an end or edge view thereof. These tumblers 2 are the loose tumblers 0f the combination construction, as will be readily understood. In my present invention, the combination device 1 is not employed as a lock, in the usual sense of having bolts and fences and other locking parts, but is employed as a controlling means in association with a combination lock device which is operative for locking purposes. The combination device 1 is preferably arranged at a convenient point upon the door or means of access to the vault, safe, or main guarded structure which is protected by the electric burglaralarm system, but it may be otherwise suitably arranged as desired.

3 designates an ordinary combination lock, such as is usually employed upon the doors of vaults, safes, and other structures, and is employed for lockin purposes. This combination lock 3 may e, in its main features of construction and operation of parts, of any usual or adapted type, and the diagramll ltltlC illustration shows the usual fence, 4, and bolt, 5, for locking the door, and the drawbolt, (i, these'being of the usual constructions well known in the art, and operat-' ing in the usual manner. Such combination locks, as generally employed in the art, sometimes have their bolts thrown by a mechanical arrangement,'such as a mechanical timelock, in lieu of, the arrangement for manually throwing the bolts by means of a draw be t, and in such case the mechanical arrangement is cmployedto serve the purpose of the drawbolt. \Vhile I have herein illustrated the combination lock 3 in its relation to a drawbolt, it will be understood that the means for throwing the bolts of such loclr, in its employment in association with my present invention and improvements, are not necessarily restricted to the use of a manually-operatable drawbolt, but that the bolts of the combination lock 3 may be thrown by a mechanical arrangement such as a mechanical time-lock, or in any other suitable manner, when employed in association with my invention. The combination lock 3 is suitably and conveniently mounted upon the door of the vault, safe, or other structure to be protected by the electric burglanalarm system, and l have herein shown it, in the diagrammatic illustration, in association with the usual fixed drawbolt frame, 7, the movable drawbolt bar, 8, and the (loggingblock, 9, the operation of which parts is as usual and will be readily understood.

The combination controlling device 1 is in an operative sense an electrical lock, and in its particular structural features as adapted. to my present invention and improvements it comprises a driver tumbler (shown in the diagrammatic illustration at 10) having a peripheral recess, 11, adapted to receive a roller, 12, normally bearing upon the periphcry of said tumbler and carried by an arm, 14, connected to a bar, 15, suitably spring mounted, as at 16, and carrying a contact point, 17, operating with relation to a contact point or plate, 18. The construction further comprises insulated sections or blocks, 19, upon the periphery of the loose tumblers 2, and spring contacts, 20, bearing with relation to the periphery of said tumblers.

The combination lock 3 is in an operative sense a mechanical lock for locki ng purposes and IS in electrical connection with the electrical combination lock 1. The lock 3, in its recess, 22, adapted to receive either one of two rollers, 23 and 24, respectively, bearing with relation to the periphery of said tumbler. The roller 23 is carried upon a rod, 25, con' ected to a bar, 26. suitably springmounted, as at 27, and carrying a contact point, 28, operating with relation to a contact plate or point, 29. The roller 24 is correspondingly carried by a rod, 30, connected to a bar, 31, spring-mounted, as at 32, and carrying a contact point, 33, operating with relation to a contact plate or point, 34. The mounting of the respective rollers 23 and 24 and their main carrying bars 26 and 31 is preferably reversely-arranged, as shown.

At 35 and 36, respectively, are shown contact plates or blocks, which are carried upon the movable drawbolt bar 8, the mounting of said plates upon the drawbolt bar being preferably by means of an insulated plate, 37, secured to said bar. The contact 35 is of shorter extent than the contact 36, and by the movement of the bar 8 these contacts are operative with relation to spring contacts, 38 and 39, respectively, which are suitably mounted, preferably upon a portion. of the door frame, 40' In the general burglaralarm system to which my improvements especially relate, the contacts just described constitute d-rawbolt contact means, the operation of which will be hereinafter set forth.

in the improved electrical burglar-alarm system there is also comprised a trip (shown in the diagrammatic illustration at 41) which is suitably mounted at any desired point upon the frame, 42, of the door of the vault, safe, or other structure to be protected. This trip is preferably constituted by a plate, pivotally mounted, as at 43, to operate within the door frame and through a slot or opening, 44, therein, in such manner that said plate will be raised to the position shown in the drawings by action of the door, 45, when the latter is in normal closed position, and will drop when the door is opened or withdrawn from within the door frame. Said plate 41 carries a contact point 46, adapted to contact with a contact plate or contact point, 47, when the trip plate 41 is released and drops from the position in which it is normally held by the closed door.

The alarm 'of the burglar-alarm system is indicated at 48, and may consist of a gong device which is usually located in the protected alarm housing or structure hereinbefore referred to. The battery of the electrical alarm system is shown at 49, and the sys tem further comprises an automatic drop, shown at 50, and a test bell, shown at 51, these supplementary parts and other parts which may be comprised in the general features of the alarm circuits being preferably arranged within the main guarded structure, which is the vault, safe, or other structure to be protected, as hereinbefore referred to.

The general circuits connecting the various parts of the electrical burglar-alarm system comprised in thesubject-matter of my present invention, may be arranged in any suitable or desired manner, and I have herein shown one preferred arrangement of circuits which I will now proceed to describe. From one side of the battery 49, a wire, 52, extends to electrical connection with the tumblers of the combination electrical lock device 1, this electrical connection being in practice preferably through the metallic parts of said device 1, with which the tumblers are of course in metallic electrical circuit association. A wire, 53. extends from the wire 52 to the contact point 17 of the roller device 12. From the other side of the battery 49, a wire, 54, extends. through the frame of the automatic drop and through the test bell 51, to the short drawbolt bar contact 35. A wire, 55, extends from the wire to the spring contact 38 which operates with relation to the short drawbolt bar contact A wire, 56, extends, from the spring contact 39 which operates with relation to the long drawbolt bar contact 36, to the spring contacts 20 which operate with relation to the tumblers O and their insulated sections 19 of the electrical lock device 1. A wire, 57, extends from the long d-rawbolt bar contact: 36 to the contact 47 which operates with relation to the contact point 46 on the door trip plate 4. A Wire, 58, extends from the wire 57 to the coil of the automatic drop 50, and from the contact point 59, of the automatic drop 50, a wire. 60, extends, through the main alarm 48, to the wire From the contact. point 18 which operates with relation to the contact point 17 of the roller device 12 of the electrical lock dciicc 1, a wire, 61, extends to the contact 29 which opcratcs with relation to the contact point 28 ot' the roller device 23 of the combination lock dcvice 3, and from said contact point 28 a wire, 62, extends to the Wire 57. From the contact point 33 of the roller device 21 of the combination lock device which operates with. relation to the contact 3st. a wire. extends to the wire't'fi. and from said contact a Wire, 64. extends to the wire A wire. b5. extends from the wire 56 to the contact point 46 of the door trip plate 41, by electrical connection with said plate in any suitable manner.

The operation and advantages of my invcntion and improvements, in relation to general electrical burglar-alarm for the protection of vaults, safes, or other struc turrs, will be rcadily understood by thoscv skilled in the art. The d agrammatic illus tration of the drawings shows the position of the contacts and the relativelyoperating parts and the circuit conditions when the door of the vault or protected structure is closed or in normal position and locked, and in the positions shown th-c alarm system con trolled by the operation of the contacts is set in operative condition and ready tor actuation in case of an attack upon the protected structure. Under the circumstances just indicated, if an unauthorixci'l person tampers with the combination electrical lock 'controlling device 1, before trying to ellcct access through action upon the combination loch device 3 by removing the electrical protcc tire status of the device 3, the turning of the driver tumbler of the cl ctrical controlling device 1 will causc the roller device 12 to drop into the recess 11 of the tumbler and thus close the contact 17 and 18 which is normally open.

Vt'ith relation to the various contacts, it w ill be understood that the contact 28 and 20 is normally closed, the contact 33 and 3-1- is ncrinally open, the contacts 35 and 9- and 36 and 39 are normally open, the contact -16 and 47 is normally open the contact 17 and 18 is normally open. and the contact of the automatic drop 50 is normally open.

The closing of the contact l7 and l3 as above indicated will complete a circuit and cause an alarm to be -scunijlcd. as follows: from one side of the battery 4 through the wires 52 and 53, through the contact 17 and 19, through the wire 61, through the closed contact 2'3 and 29. through the wires (32 and 57, through the wire 58, through the automatic drop 50, and through the wire 54, to the opposite side of the battery 49. The circuit thus conpleted through the autoi'uatic drop will cause the continuous actuation of the alarm 48 through its circuit conncctions by the wire 60. he continuous alarm circuit thus established is as follows: from one side of the battery 49 through the wire 54, through the frame and closed contact '59 of the automatic drop. through the wire and across the magneto bell-devicc 18, and through the wire to the other side of the battery 49.

If, instead of first tampering with the combinati n electrical loch controlling device 1. the burglar or other unauthorized person tampers with the combination lock device I), the actuation otthe tumbler :51 will cause the roller 24 to drop into the recess 22 of said tumbler and close the normallyopen contact 33 and 34, thus completing a circuit and causing the alarm to he sounded. as follows: from one side of the battery 4.) through the wire 52, through the tumblers 2 of the electrical lock device 1, through the spring contacts 20, through the wire 56, through the wire 64, through the contact 33 and 3 through the wires 63 and 57, through the wire 58, through the automatic drop 50, and through the wire 54, to the opposite side of the battery 49.

Should an attack be made upon the door of the vault or protected structure. by blowing down the door or otherwise impairing its relation to the door frame at points hav ing the door trip 41, said trip would be re leased and thus close the normally open contact 46 and 47, which would complete a circuit and cause the actuation of the alarm, as follows: from one side of the battery 49 through the wire 52, through the tumblers 2 and spring contacts 20, through the wire 56, through the wire 65, through the trip plate 11 and contact 46 and 47, through the wire 57, through the wire 58, through the automatic drop 50, and through the wire 54 to the opposite side of the battery 49.

Should an attempt in any manner he made to spring the drawbolts, which would bring the spring contact 39 in connection with the contact 36 on the drawbolt bar, a circuit would be completed and an alarm sounded thereby, as follows: from one side of the battery 45) through the wire 52, through the tumblers 2 and spring contacts 20, through the wire 56, through the contacts 39 and 36, through the wire 57, through the wire 58, through the automatic drop 50, and through the wire 54-, to the opposite side of the battery 49.

The insulated sections or blocks 19 of the tumblers 2 of the combination electrical lock controlling device 1 are for the purpose of permitting the insulation of the spring contacts 20 from said tumblers 2, after the combination lock device 3 has been properly set to break the normally-closed contact 28 and 29, the relative positional arrangement of said insulated sections 10 being adapted to this purpose and with respect to the secret combination and the conditions of operation hereinafter described. Inthe operative arrangen'ient as herein shown, the contact 28 and 29 is normally in closed position, by reason of the fact that the roller 23 is operating upon the periphery of the tumbler 21 in a direction away from the recess 22 of said t'un'iblrr. and it will be understood that the rollcr 2t would drop into said recess and thllw close the normallyopencontact 33 and Lil before the roller 23 could enter said reccss, in the operative actuation of the combination loch device 3. These conditions are related to the features of my invention and improvements by which the locking means may be at any time operated to enable the opening of the door of the protected struc ture without causing an alarm to be sound I ed,'but this provision of operation can only be accomplished by an authorized person having cognizance of the secret coinbination whereby authorized access to the protected structure can be gained. For instance, the adjustment of the combination lock device 3 is such that a secret combination will enable the operation of the lock to permit the roller 23 to drop into the reccss 22 when the tumbler 21 is turned to the left from the position shown in the diagrammatic illustration of the drawings, and the conditions are such that it would be neccssary to turn said tumbler to the left and to stop at a definite secret combination whereby the recess 22 will be directly under the roller 23. It will be understood that if the tumbler was first turned to the right, in tampering with the combination lock, a eir cuit would be completed and the alarm actuated by reason of the closing of the normally- open contact 33 and 34. But the op eration under the secret combination, by an authorized person having cognizance thereof, to bring the recess 22 directly under the roller 23, would cause the opening of the normally-closed contact 28 and 29 and thus disconnect the combination lock device 3 from the alarm circuits. Then, under these conditions, the authorized person, in the further operation of the locking means, can manipulate the combination electrical lock controlling device 1 to arrive at a definite secret combination, of which he has cognizance. which will set the spring contacts 20 on the insulated sections or blocks 19 of the tumblers of said device 1. This latter action of course takes the electrical current connections completclv from the combination lock device 3 and the drawbolt bar con-- tacts 39 and 36 and the door trip device 41, and the authorized person can thereafter manipulate the combination lock def-rice 3 upon its regular locking combination and unlock and open the door in the usual manner without sounding the alarm and without disturbing the general conditions of the burglar-alarm system which are not related to the locking means and the opening and closing of the access door. The secret com bination herein set forth, for disconnecting the locking means and door protective contacts from the electrical curren connections, is of course entirely different from the regular combination by which the locking means is operated to enable the un locking and opening of the door. In pram tical usage, it is of course not necessary that. the same person have cogmizancc of the secret combination whereby the r king means is disconnected from the eleotr; ll currentconnecticns and the regular combinatiim for enabling the unlocking and opening of the do r. but these different combinations can be respectively known. to two persons the presence of both of which would be required to enable the unlocking and opening of the door and access to the protected structure without actuating the alarm,

A further condition of the operative status of the electrical burglar-alarm protective system comprised in my present invention and improvements is that. when the bolt of the combination lock 3 is thrown, by the usual operation of said lock, and the bolts which fasten the door to the walls of the door opening and which are held by the drawbolt bar-8 are released by means of the usual drawbolt handle, the movement of said drawbolt bar 8 either forward or backward causes the passage of the short drawbolt bar contact 35 under the spring contact 38 on the door frame. This completes a circuit during the period of time the contact 35 is passing beneath the contact 38 in the movement of the drawbolt bar. 8, and during this BI'lOd of time the test bell 51 will be soon ed. This sounding of the bell will serve as an indication that the batteries are in gbod condition, and will also serve as an automatic test of the strength of the batteries. It will be understood that the movement of the drawbolt bar 8 only maintains this completed circuit condition for a determined period of time, regulated by the length of the short drawbolt bar contact 35, as the spring contact 38 will pass off the ontact 35 and onto the insulated plate 37 in either direction, during the movement of the drawbolt bar 8. The completed circuit under the conditions just mentioned, is as follows: from one side of the battery 49 through the wire 52, through the wire 55, through the spring-contact 38, through the contact 35, and through the wire 54 and test bell 51 and automatic drop 50, to the opposite side of the battery 49. The operative status of the contacts 35 and 38 is also such that in closing andlocking the door the test bell will continue to ring until the door and drawbolt bar have been brought to proper position, as only the proper throwing of the drawbolts will bring the contacts 35 and 3iu the relative position in which they are out of contact, and thus the operative status of the mechanism just described will serve as a. test for assuring the proper clos ing and locking of the door.

In the preferred arrangement of the combination electrical lock controlling device 1 and the combination lock device 3, both of these devices may be suitably arranged to be carried by the same door of the protected structure, but withinthe compass and intent of my invention and improvements the conr bination lock device 3 could be mounted 0 of the u'oirctod structure and trically protected housing or structure, under which circumstances the electrical circuit connections between the devices 1 and 3 would be contained in a protected cable such as is usually emplhyed in burglar-alarm systems of this character where an exposed connection is made between two separated parts of the system. If the device 1 is located at a station away from the protected structure, its operative conditions would be controlled at that station, and thus the control of the combination lock device 3, to enable the opening of the door of the protected structure and access thereto without actnatin; the alarm, would be governed from the station at which the device 1 was located. It will be understood that, when the controlling device 1 is located at an alarm station away from the protected structure, a single device 1 could be adapted to protect a plurality of distant structures either located adjacent each other or at various individual points and each guarded by the combination lock device 3, by having the electrical connections from the single controlling device 1 extend to all the separate combination lock devices 3. Thus, the control of all of the electrically protected combination lock devices 3 could be governed by an operator at a distant central station, who would have to set the controlling device 1 so that the sprin contacts 20 contacted with the insulated blocks or sections 19 thereof before the combination 'locks 3 of the distant protected structures could be operated to enable access without actuating the alarm. Under the circumstances and conditions just stated, author: ized persons desiring access to the protected structures would first notify the central station to properly set the controlling device 1, to enable their access to the Protected structure without actuating the alarm, or the .central station could operate the controlling device 1 at a predetermined and mutually understood time when access was to be permitted to the protected structure or structures.

Various other modifications in the relative arrangement and operative status of the mechanisms comprised in my present invention and improvements may also be employed. If desired, a mechanical time lock could be employed with relation to either or both the combination electrical lock controlling device 1 and the combination lock device 3, to dog the same, as will be readily understood. i

I do not desire to be understood as limiting myself to the detail construction and arrangement of parts or circuits as herein shown and described, as it is manifest that variations and modifications therein may be whir "'1 n th adaptation of my invcnn5 i .l,

invention and improvements. I therefore reserve the right to all such variations and modifications as properly fall within the scope of my invention and the terms of the following claims.

Having thus described my invention, I claim and desire to secure by Letters Patent:

1. In an alarm system, an electric protecti ve aanm circuit, a structure protected thereby, access means to said structure, locking means governing said access means and in electrical connection with said circuit, said connection comprising ncans whereby unauthorized tampering with the locking means will cause the actuation of the alarm, and 1nanually-opcratable means in electrical connection with said circuit, said last named connection comprising means whereby unauthorized tampering'with said manuallyoperatable means will cause actuation of the alarm and means whereby authorized operation of said manually-operatable means will disconnect said locking means from its circuit connections to enable operation of the locking means without actuating the alarm.

2. In an alarm system, an electric protective alarm circuit, a structure protected therebyaccess means to said structure, locking means governing said access means and in electrical connection with said circuit, said connection comprising means whereby unauthorized tampering with the locking means will cause the actuation of the alarm, and supplementary means manually-operatable to cause actuation of the alarm and to control the circuit connections of said locking means so that authorized operation of the latter can be eftected without actuating the alarm.

3. In an alarm system, an electric protective alarm circuit, a structure protected thereby, access means to said structure,

locking means governing said access means and in electrical connection with said circuit, said connection comprising means whereby unauthorized tampering with the locking means will cause the actuation of the alarm, and supplementary meansin connection with said alarm circuit and in connection with the circuit connections of said locking means with said alarm circuit said supplementary means being manuallyoperatablc to cause actuation of the alarm and control the electrical connections of said locking means so that authorized operation of the latter can be effected without actuating the alarm.

4. In an alarm system, an electric protective alarm circuit, a structure protected thereby, access means to said structure, lock-v ing means governing said access means and in electrical connection with said circuit, said connection comprising means whereby unauthorized tampering with thelocking means will cause the actuation of the alarm, supplementary manually-operatable means 5. In an alarm'system, an electric protective alarm circuit, a structure protected thereby, access means to said structure, a combination-lock mechanism governing said access means and in connection with said circuit, said connection comprising means whereby unauthorized tamperin with said combination-lock mechanism Wlll cause the actuationof the alarm, a supplementary combination mechanism in connection with said alarm circuit, said last named connection comprising means whereby unauthorized tampering with said supplementary combination mechanism will cause the actuation of the alarm, and electrical connections between said supplementary combination mechanism and said combination-lock mechanism, said last named connections comprising means whereby authorized actuation thereof will enable operation of the combination-lock mechanism without actuating the alarm.

6. In an alarm system. an electric protec tive alarm circuit, a structure protected thereby, access means to said structure, a combinationdock mechanism governing said access means and comprising tumblers. an automatic switch mechanism governed by the tumblers of said combination-lock mech' anism and in connection with said alarm circuit, whereby unauthorized tamperin with the combination-lock mechanism will eause'the actuation of the alarm, a supplementary combination mechanism comprising tumblers, an automatic switch mechanism governed by the tumblersof said supplementary combination mechanism and in connection with said alarm circuit whereby unauthorized tampering with said supplementary combination mechanism will cause the actuation of the alarm, and circuit connections between said supplementary combination mechanism and said combination-lock mechanism, said last named connections comprising means whereby authorized actuation thereof will enable operation of the combination-lock mechanism without actuating the alarm.

7. In an alarm system, an electric protec: tive alarm circuit, a structure protected thereby, access means to said structure, a combination-lock mechanism governing said access means, an automatic switch mechanism controlled by the moving parts of said combination-lock mechanism and in connection with said alarm circuit, whereby unauthorized tampering with said combinationlock mechanism will cause the actuation of the alarm, and means for so controlling the circuit connections ofv said combination-lock "access. means, circuit connections between.

said combination-lock mechanism and said protective alarmv circuit, and means operatable by said combination-lock mechanism for controlling its circuit connections, said means comprisingdevices for maintaining the circuit; connections open when the combination-lock mechanism is operated on the true combination and for closing the circuit connections when the combinationlock mechanism is tampered with.

9. In a burglar-alarm system, a structure tobe guarded, access means to said structure, an electric alarm circuit protecting said-structure, a lock mechanism controlling the means of access to said guarded structure, circuit connections between said lock mechanism and said protective alarm cir 'cuit,- said connections comprising means whereby unauthorized tampering with said lock mechanism will cause the actuation of the alarm, and means exterior ofsaid pro tected structure, and governing said lock mechanism to cause actuation of the alarm in one order of movement and in another order of movement to disconnect said lock mechanism fromsaid electrical connection to permit authorized operation thereof without actuatin the alar 10. ,In a urglar-alarm system, a structure to be guarded, access means to said structure, an electric' alarm circuit protecting said structure, a lock mechanism controlling the means of access to said guarded structure, circuit connections between said lock mechanism and said protective alarm' circuit, said connections comprising means whereby unauthorized tampering with said lock mechanism will cause the actuation of the alarm, and manual]y-operatable means exposed exteriorly upon said protected struc ture and operatable in one order of move ment to cause actuation of the alarm and in another predetermined order of movement to so control the electrical connection of the locking mechanism that authorized operation thereof can be effected without actuating the alarm.

11. In an alarm system, an electric protective alarm circuit, a combination switch mechanism in connection with said alarm circuit and operatable to cause the actuation of the alarm, a combination switch and locking mechanism in connection with said alarm'circuit and with said first combination switch mechanism and operatable' to cause the actuation of thealarm, and manu ally-operatable means governing said combination mechanisms to cause actuationof the alarm in one order of movement and in another predetermined order of movement to disconnect said combination mechanisms from the alarm circuit to permit authorized opening of the combination locking mechanism without-actuating the alarm.

12. In a burglar-alarm system, a structure to be guarded, an electric alarm circuit protecting said structure, a coml'iination' switch mechanism in connection with said alarm circuit and operatable tocause the actuation 35 of the alarm, a combination switch and locking mechanism inc'losed within guarded structure and in connection with said alarm 'circuit and with said first combination switch mechanism and operatable'to cause the actuation of the alarm, and manuallyoperatablc means exposed exteriorly of said protected structure and governing said combination mechanisms to cause actuation of the alarm in one order of movement and in another predetermined order of movement to disconnect said combination mechanisms from the alarm circuit to permit authorized opening of the combination locking mechanism without actuating'the alarm.

13. In an, alarm system, an electric protective alarm circuit, a combination switch mechanism in connection with said alarm circuit and operatable to cause the actuation of the alarm, a combination'switch and locking mechanism in connection with said alarm circuiband with said firstcombination switch mechanismand operatable to cause the actuation of the alarm, means governing said combination mechanisms to cause actuation of the alarm in one order of movement and in another predetermined order of movement to disconnect said combination mechanisms from the alarm circuit to permit authorized opening otthe combination locking mechanism without actuating the alarm, and means for'indicating whether the locking mechanism has been returned to normal locking action and is'thus set for its operative action to cause actuation of the alarm, said means operating when the locking mechanism is operated to return it to locking position.

14. In an alarm system, an electric protec tive alarm circuit, a combination switch mechanism in connection with said alarm circuit and operatablc to cause the actuation of the alarm, a combination switch and locliing mechanism in connection with said alarm circuit and with said first combination vmechanism in connection with said test alarm circuit and operating to actuate the same to indicate whether the locking mechanism has been returned to normal locking action and is thus set for its operative action to cause actuation of the alarm, said supplementary switch mechanism being operative when the locking mechanism is operated to return it to locking position.

15. In an alarm system, an electric protective alarm circuit, a structure protected thereby, access means to said structure, a combination switch and locking mechanism governing said access means and in connection with said alarm circuit and operatable to cause the actuation of the alarm, means controlling said combination switch and locking mechanism to enable authorized operation thereof without actuating, the alarm, ,a'" movable part comprised in the locking mechanism and controlling the op-" erative locking action thereof, an auxiliary test alarm circuit, a circuit contact carried by said movable part and in connection with said test alarm c1 rciut, and a fixed contact operatable with relation to said mow able circuit-contact and in connection with the .test alarm circuit, whereby said contacts will operate to cause the actuation of the test alarm circuit to indicate whether the locking mechanism has been returned to normal locking action and is thus set for its operative action to cause the actuation of the alarm, said contacts operating when sai:l mo\'able part of said locking mechanism is operated to return the locking mechanism to locking position.

16. In an alarm system, an electric protective alarm circuit, a structure protected iherehy,access means to said structure, a combination switch mechanism in connection with said alarm circuit and operatable toc'anse the actuation of the alarm, a combination switch and locking mechanism governing said access means and in connection with said alarm circuit and with said first combination switch mechanism and operatable to cause the actuation of the alarm, means for disconnecting said combination mechanism: from the alarm circuit to permit authorized opening of the combination locking mechanism without actuating the alarm, a movable partas at 8-comprised in the locking mechanism and controlling the operative locking afction thereof, circuit contactsas at 35 and 36carried by said mow able part, and stationary circuit contacts as at 38 and 39 -adapted for contact with said movable circuit-contacts, said circuit contacts 36 and 2 9 being relatively arranged in electrical connection with said protective alarm circuit" and with said combination mechanisms, an auxiliary test alarm circuit, said circuit contacts 35 and 38 being relatively arranged in electrical connection with said test alarm circuit, substantially as set forth, whereby said movable part and the contacts 35 and 3S and circuit connections thereof constitute means to cause the actua- -tion of the test alarm circuit to indicate whether the locking mechanism has been returned to normal locking action and is thus set for itsoperative action to cause the actuation of the alarm, and said movable part and the contacts 36and 39 and circuit connections thereof constitute means to cause the actuation otthe main protective alarm circuit when said first combination switch mechanism hasnot been' set in its operative position to establish the normal electrical connectionv of the combination. locking mechanism with the main protective alarm circuit, said contacts operating when said movable part of the locking mechanism is operated to return the locking mechanism *to locking position.

17. In a burglar-alarm system, a structure to be guarded, access means to said structure, an electric alarm circuit protecting said structure, a locking mechanism governing said access means and in connection with said alarm circuit, said connections comprising means whereby unauthorized tam-g pering with the lockingmechanism will cause the actuation of the alarmya movable part in association with said locking mechanism .7

and controlling the operative locking action thcreoef, means controlling the circuit connections of said locking mechanism to enable authorized operation thereof and of said movable part without actuating the alarm, and a supplementary automatic switch Vmechanism in connection with said alarm circuit and controlled by said mov able part, said supplementary switch mecha uism and circuit connection constituting means to cause the actuation of the alarm by movement of said part independent of FREDERICK ARNOLD SMITH.

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