US1022848A - Electric protective circuit. - Google Patents

Description

O. JAGOBSON.

ELECTRIC PROTECTIVE CIRCUIT.

APPLICATION FILED SEPT.1,1908.

1,022,848. Patented Apr. 9, 1912.

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ELECTRIC PROTECTIVE CIRCUIT.

APPLICATION FILED SEPT. 1, 190B.

Patented Apr. 9, 1912.

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' OLE JACOBSON, OF HAMILTON, OHIO, ASSIGNOR TO HERRIN'G-HALL-MARVIN SAFE. COMPANY, OF HAMILTON, OHIO.

ELECTRIC PROTECTIVE CIRCUIT.

Specification of Letters latent.

Patented Apr. 9, 1912.

Application filed September 1, 1908. Serial No. 451,206.

To all 207mm. 2'15 may concern Be it known that I, Olin JACOBSON, of Hamilton, in the county of Butler and in the State of Ohio, have invented a certain new and useful Improvement in Electric Protective Circuits, and do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to an improvement in protective circuits for safes and vaults. It is also, as a matter of fact, equally applicable to the protection of any inclosure containing a door upon which it would be considered desirable to locate a lock It relates especially to a system of electric protection for safes or vaults which comprises the location of a circuit closing arm upon the shaft of a combination lock, 10- ca ted in the door of the safe or vault, which when set so that the combination of the lock points at a definite figure thereon, will preserve the protective circuit in such a condition that the alarm connected therewith will not ring, but which when moved to any appreciable extent will cause the circuit to be changed in such a way as to ring the alarm.

My intention comprises the application to a circuit of the above character of a switch located in proximity to the combination lock. which may be set when the door of the safe or vault has been closed and secured in place, in such a way that the safe or vault will be protected by the circuit; but which when moved to another position, known only to the owner or other authorized person, will so change the connections of the protective circuit that the combination of the main lock can be moved to any degree desired, for the purpose of opening the door of the safe or vault without ringing the alarm. In other words, it will be seen th at when an arrangement of this character, when it is desired to open the safe door, the switch which is operable from the ex terior of the door, is first moved to a certain position determined by a number previously known. In this position the connections of the protective circuitwill be changed in such a way that the portion of the combination lock which has previously, because of its position, protected the safe from being opened, no longer controls the main circuit, but the combination lock itself may be moved to any desired extent so as to operate the tumblers in the usual Way to unlock the fastening devices located on the front of the safe or vault. After the safe door has been opened in the above manner, in order to throw the protective circuit into operation, the door is closed and the tumblers of the combination lock operated in the usual manner so as to close the fastening means engaging the interior of the safe; then the combination of the combination lock is set at a, certain figure so as to cause the protective circuit to pass through the combination lock. After this has been accomplished, the switching means which is also located on the front of the safe, is moved in such a way that the portion of the circuit which has been temporarily caused to pass through the switch, is now broken, thus compelling the entire main protective circuit to pass through the combination look.

It Will be seen that an invention of the above character is applicable as well to a protective circuit which is of the nature of a normally closed main protective circuit, as to a protective circuit which is normally open.

In the accompanying drawings Figure 1 is a front elevation of a safe equipped with my invention; Fig. 2 is an interior elevation of a safe door and the switching means; Fig. 3 is a horizontal section of the same; and Fig. 4 is a diagrammatic view of the entire protective system.

In the drawings, the current proceeds from the battery 1 located in the main circuit through a wire 9. to a safe 3. The wire 2 after reaching the safe is led to binding post 4, carried. upon a block 5 "for supporting the switching mechanism. At the binding post 4 the said wire 2 branches, one branch 6 leading to a binding post 7 and the other branch 8 leading to a binding post 9. Attached to the binding post 9 there is an insulated elevated spring-finger 10, the end of which is adapted to overlie a portion of an insulated disk 11, carried upon the innor end ofa shaft 12 connected to a handle 13 and a graduated indicator 147-, located upon the exterior of the safe. The disk .11 carries upon its inner face a radial conducting projection 15, which, when moved by means of the handle 13 to a certain position in its rotation, is caused to underlie and contact with the free end of the springfinger 10. The binding post 7 is located upon. an insulated plate 16 which carries at its center the journal bearings 17 for the pintle of a lever 18, one end of which extends inwardly over the plate 5 and is pressed by means of a spring 19 upwardly into contact with an insulated. stationary stop arm 20 located upon the plate 5. The other end of the lever 18 is beveled at 21, this end extending out over the safe door 22. The latter is equipped in the usual manner with a combination lock having a handle 23 and graduated indicator 2* lo cated upon the outside of the door. On the inner end of the shaft- 25, which is attached to the handle 23, is firmly secured an arm 26 by means of a screw 27. The outer end of the arm 26 is beveled at 28 in a manner similar to the beveled portion 21 of the lever 18. The current thus is adapted to be led at times from the wire 2 through the wire 6, the lever 18, the arm 26 and the shaft 25 of the combination lock. The current from this point passes through the body of the safe itself, inasmuch as the wire connected to the other terminal of the battery is attached directly to. the safe at any desired point. The wire 29 leading from the body of the safe passes to the magnets of a relay 29?, which consists of two pairs of opposed solenoids 30 having located between them an armature 31 pivoted at the point 32, and spring-pressed by means of a spring 33 into contact with a terminal 34 located in proximity to the free end of the armature 31. The current passes from the righthand pair of solenoids 30 through a wire 35 to the other pair of solenoids 30 located at theleft of the relay. A. wire 36 conducts the current of the main circuit from the latter pair of solenoids back to the other terminal of the battery 1.

I provide a means located in the main circuit for shunting out the left pair of solenoids altogether for the purpose of resetting the armature 31, as will be more fully hereinafter described. This consists of a switch 37, one post of which is connected by means of a wire 38 to the wire 36, and the other post of which is connected by means of a wire 39 to the wire 35. When the armature 31 is released from the influence of the current of the main circuit, that is to say, when the main circuit has been broken, the spring 33, as described above, moves the outer end thereof into contact with the contact device e0. This results in the closing of a local alarm circuit. The current proceeds in the local alarm circuit from the batteries 4:1 through a Wire 1E2 to the contact device 40. In the closed position of this circuit the current then proceeds through the armature 31 and the pivot 32 to a wire 43. The wire 43 branches, inasmuch as I use two alarm devices', one branch 44 leading to a bell 4-5, and the other branch 46 leading to a relay 4'? for operating the other alarm device. The current after passing through the bell at?) is led by means of a wire 48 to an annunciator l5) and finally to a post 50 upon a switch board 51. The other branch 46 of the circuit leads to the solenoids 52 of the relay s17. which are adapted. when the local circuit has been closed. to actuate an armature which is normally pressed by means of springs it away from the cores of the solenoids. The armature 53 carries at its free end and upon its rear face a knob-like projection 55, against the under face of which when the armature is retracted by means of the springs, an arm 56 of a bell-crank lever 57 rests, inasmuch as the arm 56 is normally moved upwardly by means of the weighted arm 56 constituting a portion of the bellcranl lever. The current of the local alarm circuit leads from the solenoids 52 through a wire to another post 60 upon the switch block 51. The switch block carries also a switching arm 61 adapted to contact with either one of the posts 50 or 60. The latter posts 50 and 60 ai'e also sufficiently close together to permit the switching arm 61 to contact with both of the posts simultaneously if so desired. A wire 62 leads from the pivot of the switching arm 61 back to the other terminal of the batteries 41 of the local alarm circuit. When the armature 53 has been actuated by the solenoids 52. the arm 56 of the weighted lever is adapted to be released so as to cause the closing of a subsidiary alarm circuit. One terminal of the battery 63 located in this circuit is connected by means of a Wire 64 to the weighted lever and consequently the movable arm 56. lVhen the latter has been moved because of its release by the armature the end of the arm 56 contacts with a stationary arm (35 attached to the block 47. The current. then passes in the subsidiary alarm circuit through the arm 65 and a wire 66 to an electrically operated born 67. from which the current leads back again through a wire 68 to the battery 63 of the subsidiary alarm circuit.

In the operation of the device, we will assume that the various portions of the protective circuit have been set so as to protect the safe or vault from entry by an unauthorized person. In this position of the device the projection 15 upon the disk 11 has been moved out of contact with the springfinger 10, so as. to break this portion of the circuit. The current in the main protective circuit will then pass from the battery 1 through the wire -2 and the wire 6 to the lever 18 located on the interior of the safe or vault. The lever 18, which is spring pressed into contact with the arm 26 carried by the shaft of the combination lock, then conducts the current through the said arm 26 to the shaft 25 of the combination lockand the body of the safe itself. The current from this point leads through a wire to the solenoids 30 of the relay .29. The switch 37 being moved normally into the position shown in Fig. 4, the current will pass also through the left pair of solenoids of the relay 29 and finally, by means of the wire 36, to the other terminal of the battery 1. The main protective circuit is thus a norimilly-closed circuit. The local alarm circuit. however, is a normally open circuit, inasmuch the armature 31 having been set. in a manner to be hereinafter described. is moved toward and retained by the right pair oil, solenoids 30 of the relay 29. lu'nvcvcr. the. main protective circuit be broken for any reason, such, for example. as tampering with the con'ibination lock and the consequent movement of the arm 26 out of contact with the lever 18. then the arma turc 31 would be moved by means of the spring 33 into contact with the contact device it), thus completing the local alarm circuit. In this condition. of the latter circuit, the current proceeds from the batteries 41 through the wire 42 the contact 40, the armature 31. the pivot 32, and the wire 43, to the alarm devices. The current will then proceed in the local alarm circuit according to the position of the switch arm 61. If the switch arm has been moved into contact with the post 50, the current will then pass alone through the hell 45, ringing the same. through the am'iunciator 49 so as to actuate it also. and then through the switch 51 and back to the batteries 41. In the case where the v witch arm 61 is moved so as to contact with the other post (it), the current passes from the wire 4-3 through the wire 48 to the solenoids 52 of the relay 4", thence through iho wire 5%) and switch 51, back to the batteries it. In this case itwill be seen that the armature 53 will be attracted by the solenoids 52 so as to release the arm 56 from the projection \Vhen this takes place the arm 56 is moved upwardly through the agency of the weighted arm 58 so as to contact with the stationary arm (55 located in the subsidiary alarm circuit. After this has taken place the current then proceeds tron] the battery 63 located in the subsidiary alarm circuit through the wire 64, the arm it the stationary 21111105, and the wire 66, to the electrically operated horn 67, sounding; the same. and back through the wire ()8 to the battery (33. Because of the close proximity ot' the posts 50 and 60. it is also possible to move the switching arm 61 so that it contacts with both posts simultaneously. In such a position oi the switch arm all of the alarm devices would be simultaneously operated, cacli operating in the above described manner. lYhon the above changes in the circuit have taken place, that is to say, when for some reason the main protective circuit Y taets with the end of the lever 18.

Should,

has been broken so as to actuate the various alarms, it will be necessary, in order to move the devices into the position in which they protect the sate. to first close the safe door should the same have been opened,and after locking the same in the usual manner by the operation of the combination lock. to move the combination of the lock to the pre-detern'iincd position in which the awn 26 conlhis will not, however. result in re-setting the armature 31 to the position shown in Fig. 4t so as to break the local alarm circuit. inasmuch as the strength of the two pairs of magnets on either side of the armature are equal: but it will be necessary in order to move the armature into this position. to close the switch 37 which shunts the left pair of solenoids 30 and causes the remaining pair to attract the armature to the position shown in Fig. 4. \Vhen this has taken place the switch ,37 is again opened, as the armature 31 will be retained in the position in which it has been set because of the fact that it is there situated closer to the solenoids located at the right of the relay than to the remaining solenoids. It will also be INOQSSEHY to re-set the relay -17 by hand. moving the weighted arm 58 upwardly until the arm 56 has passed below the projection in which position it will be retained until the armature is again attracted by the solenoids W hen an authorized person desires to enter the sate without ringing the alarm. it is necessary for him merely to move the handle 13 until the graduated indicator connected therewith is positioned opposite a certain figure previously known, which will indicate that the projection 15 has been moved into contact with the springfingei; 10. lVhen this has taken place the current passes directly from the wire 2 through the wire 8, the spring-finger 10, the projection 15 and the disk 11, to the casing of the safe itself. thus avoiding the safe door and the combination lock with its attachments entirely. The combination lock on the door can then be operated so as to move the door into its open position without interfering with the condition of the main protective circuit. hen this has been done and it is desired to rc-connect the door in the main protective circuit so as to protect the safe, it. is necessary to move the arm .26 on the combination lock into contact with the lever 18 and then move the graduated indicator 1% attached to the handle 13, to any other than the known pre-determined point, at which theprojection will come in contact with the a ming-finger 10. The current will then in this position pass only through the combination lock and its attachn'ients, and will avoid the projection 15 and the springtingcr it) a together.

It will be seen that while .1 have described my invention above in detail, that my invention resides in the fundamental principles of the device described, and that the latter is capable of many changes and different applications without departing from the essence of my invention.

I claim 1. In a device of the character described, the combination with a door, of an electric circuit, an alarm operatively connected therewith, a combination lock for said door normally included in said circuit and hearing a circuit closer upon its shaft to complete said circuit, a shunt and a switch therein operable from the outside of said door for shunting the current around the lock.

2. In a device of the character described, the combination with a door, of an electric circuit, an alarm operatively connected therewith. a combination lock for said door normall included in said circuit and carrying a circuit closer upon its shaft to complete said circuit, a shunt and a switch therein located on the door casing and operable from the outside oi said door for shunting the current around the lock.

3. In a device of the character described, the combination with a door, of an electric circuit, an alarm operatively connected therewith. a combination lock for said door normally included in said circuit and carrying a circuit closer upon its shaft to complete said circuit, a shunt and a switch therein. located on the rear of the door casing and operable from the outside of said door for shunting the current around the lock.

i. In a device 01 the character described, the combination with a door, of an electric circuit. an alarm operativcly connected therewith, a combination lock for said door normally included in said circuit and carrying a circuit closer upon its shaft to com plete said circuit. a shunt and a switch therein, operable from the outside of said door for shunting the current around the lock, said switch being provided with a graduated indicator to indicate its position.

5. In a device of the character described, the combinationwith adoor, of an electric circuit, an alarm operativ'ely connected therewith, a cobmination lock for said door normally included in said circuit, and

carrying a circuit closc'r upon its shaft to complete said circuit, a shunt and a switch therein located on the door casing for shunting the current around the lock, said switch being provided with a graduated indicator on the outside of said door casing to indicate its position.

6. In a device of the character described, the combination with a door, of an electric circuit, an alarm opcratively connected therewith, a' combination lock for said door normally included in said circuit, and carry ing a circuit closer upon its shaft to complete said circuit, a shunt and a switch therein located on the run of the door casing for shunting the current around the lock, said switch being provided with a graduated indicator on the outside of said door casing to indicate its position.

7. In a device of the character described, the combination of an electric circuit. a protective structure therein including a door, a combination lock thereon carrying a circuit closer upon its shaft to complete said circuit, a shunt and a switch therein, located upon the rear of the door on the interior of the structure. for shunting the circuit around the lock. said switch being operable trcm the outside of said structure.

In testimony that I claim the foregoing I have hereunto set my hand.

OLE JACOBSON.

Vtitnesses: h

Romain J. h'nAXu, ()scau VVuiunnsox.

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