US2493576A - Burglar alarm - Google Patents

Description

Jan. 3,1950 F. A. Foss 2,493,576

BURGLAR- ALARM Filed May 4, 1948 2 Sheets-Sheet 1 CLOCK C/Rcu/T ALARM ON ON ON Jan. 3, 1950 oss 2,493,576

BURGLAR ALARM Filed May 4, 1948 2 Sheets-Sheet 2 IN V EN TOR.

' FRANK ALL E/V F055 i atented Jan. 3, 1950 BURGLAR ALARM Frank A. Foss, Keyport, N. J., assignor of onehalf to Howard T. Jeandron, Keyport, N. .1.

Application May 4, 1948, Serial No. 25,032

This invention relates to an automatically operated burglar alarm system and more particularly to a completely packaged automatic unit.

Burglar alarm units are old in the art. They comprise an activated circuit in which a plurality of switches are incorporated and are generally provided with an alarm bell that becomes energized when the alarm circuit is broken. Most of the alarm circuits utilized are manually turned on at the time of closing or looking the premises, whereas this invention provides a time clock operated unit in which the same parallel circuit connected to a plurality of switches becomes energized at a predetermined time by the operation of the time clock and becomes de-energized at a predetermined time by the same time clock. In addition, this invention includes a holding circuit so that in the event any switch protecting an opening is opened, the alarm circuit becomes energized and due to a holding circuit it cannot be de-energized by the closing of the same switch but is 7 provided with a reset switch to return the circuit to its normal condition. Also, in addition, this invention provides two time clock circuits connected in parallel relationship. The one time clock provides normal operation over a 24-hour period, whereas the other time clock operates on a weekly period, that is, in the operationof these time clocks a dial is utilized on which an on and off switch is provided. The 24-hour dial turns the alarm circuit on with its on switch and turns the circuit off with its off switch and, likewise, the weekly time clock causing the weekly dial to make one revolution in one week and thus being provided with an on switch which when operated cuts out the 24-hour dial taking over the energizing of the circuit until its off switch releases or de-energizes the circuit when the 24-hour dial again takes over control.

An object of this invention is to provide a completely packaged unit that can be readily plugged into a 110 volt circuit to supply the necessary potential for operation and in addition provides a 24 volt circuit that may likewise be plugged into the unit to provide the low potential rotecting circuit.

A further feature of this invention is the automatic time clock operation of the unit providing means to automatically energize the alarm circuit and de-energize the circuit according to predetermined time settings.

A still further object of this invention is the provision of two time clock units within the circuit providing means to automatically turn the circuit on and off for the usual 24-hour daily period, as well as means to turn the alarm circuit on for a weekend period or a holiday and subsequently turn the circuit oil.

A further feature Of this invention is the provision of a holding circuit within the unit so that Claims. (own-314) mounted thereunder. side of dial [8, showing shaft 2!] which supports diaclosure or boxlike structure 'I I. The front face of the box ll comprises a panel l2, and. the other side-0f the unit is provided with a back panel M. The panel I2 is'provided with a plurality of apertures for mounting Various components. A plurality of signal lights I5, 16 and I! are mounted on the panel l2 through these apertures. Also a pair of rotatable dials l8 and I9 are mounted on shafts 20 and 2|, the shafts in turn projecting through apertures on the panel ii to retain the dials l8 and- 19 in juxtaposition to the panel l2.

A reset button I3 is also mounted in the panel 12. A pair of switches 22 and 23 are mounted between the under side of the dials l8-I9 and the face of the panel I2. Referring to Fig. 2, we may see the general scheme of the switches 22-23 and the manner in which the dial face with its on and off switch buttons affects the operation of the switch Fig. 2 illustrates the under and drives the dial 18 in its single revolution in 25 hours. -A pair of switch buttons 25-26 are provided, and the under side of same are shown in Fig. 2. The buttons are afiixed to the periphcry of the dial IS in any suitable manner to retain them in the position as illustrated. In this particular instance, the button has a U-shaped end, fitting over both sides of the dialand a'set screw 2'! is provided in the upper faceso that by turning the set screw 2! the member 25 can be secured at any particular point on the dial 1 8. The buttons 25-46 are also provided with circular extending pins 35 which are utilized as the means of operating the switch 22. Since the face of the dial I8 is provided with hourly and minute markings, it is readily apparent that a definite time may be selected and the buttons 25-26 may be mounted at predetermined time positions. In Fig, 2, the under side of the face of dial l8 also illustrates the pivotal arm-30 0f the switch 22. The arm 30 is pivoted at 3| which is mounted-to the panel 12. The arm 30 is provided witha cam 32 at its center-thereof, and the arm 30 is so positioned that as the dial I 8 rotates, the pin 35 of the off switch 26 will abut against the cam 32 to'move the pivotal arm 30 to its stop position as illustrated in full lines in Fig. 2. Likewise, when the switch button 25 reaches the position illustrated in Fig. 2 with its extending pin 25 adjacent to the arm 30 as the dial I8 continues to rotate, the pin plurality of signal lamps 15, I6 and at] are also connected to this Wiring diagram. There is also provided a transformer .41 that be connected on the primary side to a 110 volt circuit and on the secondary side is connected to the 24 volt circuit. There are three relays 48, 49

and 50. Also connected in the circuit a si nal bell and the reset switch 13. The relay 48 is provided with a single normally closed contact switch 52. The relay 49 is provided with four contact switches53, 54, 55 and 56, in which switches .53, 5,5 and ,56 are normally closed and 54 remains open until the relay is energized,

yvhen switches 53, 55 and 56 will he opened and ,54 closed. Relay 50 is provided with three contact switches 51, 58 and 59, all normally open until the relay becomes energized. Also included in the circuit are the two time clock operated switches 22 and '23,

Th various components are connected in the following manner-a The time clock motors -45.-..-:4.5 are connected to the female plug 43 by means of connecting wires i60.6 l so that when a 1-1-0 volt connecting plug is connected to the socket 43, potential is supplied to the motors 45-146 for continuous and 23 is connected by a lead 63 to :the connect;

ing leadfi ll, which @is the opposite side of the 110 volt circuit. Thus, when 110 volt potential is connected'to the plug 43 the trans-former 41 is energized and a 24 volt potential provided on the opposite side .of the transformer. Thus through leads -65 and 66 the alarm circuit may be eonnected. Lead 56 goes directly to the female plug 31 and the alarm circuit comprised of a p u a ty o w ch not shows) wil in tu he connected, and when all switches are closed the circuit may be completed from lead V 66 4 position to efieot energization of the transformer 41. Of course, it is understood that when the oif position of the time motor trips these switches to anopenpO ition, trahsf orlner 41 will be de-energized and the alarm circuit is without potential.

It is understood that if the user intends to proy-ide photo cell switches, they may be readily plugged into socket 38 to similarly affect the circuit already described, the photo cells acting on the principle of being energized and remaining .so .until their beam is interrupted, at which time the circuit already described would be interrupted. Assuming the alarm circuit has been interrupted by either a photo cell or a switch connected to said circuit, the -intermotion of the potential how will deenergize relay 49. Thus, switches 5-3., :55 and 55 are again closed and switch '54 will beopened." The {lamp 15 will be extinguished and the poten- 'tial flow from lead 56 through lead ill will pass through the contact 53'and a lead 13-t0ithe red alarm lamp l6 through the opposite lead 14 of this lamp to a lead 15, which is connected to the lead of the opposite side ;of .the ,transfQ mer secondary. Thus potential is supplied to the lamp -15 to illuminate same. With this circuit energized, potential will also be supplied V of the transformer 41.

through a lead ll through the closed switch 55, through a lead 16 to :the alarm hell 5d and to the one side of the relay 55,; "The opposite side of the alarm bell 5i and the opposite side of the relay 5B are in "turn connected -to the lead 66, which is in turn connected to the opposite side of the Transformer 4! to thus supply potential to the alarm bell and the relay ;to retain t e z d- The p ti l fr m th tran f m r 4 thr ugh lead will l o flow throu h lead lll to the closed contact 55, passing therethrough to a lead 1 9 which is in turn connected :to one side of the relay 48, the opposite side ,of relay 48 being in turn connected through a normally closed reset switch l3 by means of a lead to the lead 65, which is in turn connected to the opposite side of the secondary Thus relay 48 -is energized and itwill in turn open its associated contact switch 52. It is apparent that with switch .52 retained open that after alarm circuit switches or photo cells (not shown) .are restored to a closed position, this will not restore the ci ui o eir origina ond tion- Th ar 1 b. 1 w l co ti e t ne- Th s is due to h fe t t r u h t e s t h s i par lle rela on h back to a lead 51, the lead e1 inturn being eonnected to the normally closed contact 52 of relay 48, the circuit in turn passing through a lead 68 to one side of the relay 49, the opposite side of relay 4-9 being in turn connected to the lead 65, thus completing the 24 volt circuit to t s er Thus e ay 3 inaries .e ergized and the normally open contact 54 is is closed and the remaining contacts are opened.

that the normally closed or restored circuit connected to plugs 31 or 3-8 followin lead 5,? must p ss h u h ont t swit '52, which s now retained in an open position. Therefore, rela 49 ann b a n ene zed un l a thorized person o s the r s t switc at With the closing of contact 54, potential from lead 56 will pass through a lead 10, through the contact 54, through a lead {H to the -on.pilot lamp 5 he op os te si e of the pi o lamp bein connected by a lead 12 to the lead56-5 and back to the opposite side of the transformer 14.3, thus providing potential to the lamp 45. cir- Q it is energized by the atransfomner 4! 'only'when cit-her switch 2-; or switch 23 is in its closed which t ihe en r y i removed rom re y 4 restoring contact switch 52 to its closed posit n a d t u r enersi ins rel y 4? and res ing the contacts and the alarm circuit i0 its original condition 'for operation. With the en- ,ergization of relay 50, it is apparent that the associated switches 51, 58 and 55 will be closed. Thus whilethe alarm circuit to the bell 5| continues, there will be a closing of the auxiliary circuits connected to female plugs .39, 45 and M. This circuit may be followed by referring to the volt connecting lead 132 that is connected r to one side of the 110 volt source from plug .43.

The lead 82 is connected to plugs .39, :45 and .41 'Ihe opposite side of these plugs are each connected respectively to one side of the switches 51, 58 and 59 by leads 83, 84 and 85 respectively. The opposite sides of the switches 51, 58 and 59 are connected by means of leads 86, 81 and 88 to a common lead 89, which is in turn connected to the lead 60 which is the opposite side of the 110 volt circuit. Thus a plurality of fioodlights (not shown) may be connected to plug 39 and will be illuminated when the alarm circuit is energized. Likewise, a siren (not shown) may be connected to plug 40 to be energized, or an external bell (not shown) may be connected to plug 4| to be similarly energized. For convenience with the installation of this unit, the unit includes the internal alarm bell 5|, but an external bell operated on the same 24 volt circuit may be installed at some remote point. This bell may be connected to the plug 42 and by means of its connecting leads 9!] and 9|, the external bell will be therefore connected to the alarm circuit by connecting leads 90 and 9| to leads 16 and 66 through which the potential is obtained when the alarm circuit is energized.

An additional feature of this unit is the provision of lamp I! connected across the leads 60-6l. Thus whenever the unit is plugged into 110 volt circuit, lamp I! being illuminated will indicate the time motors 45 and 46 are operating and will likewise indicate whenever there is an interruption in the main potential feed to thus stop the operation and necessary potential to operate this device. Referring to the time motors 45-46 which are similar in construction except that dial I8 is rotated one revolution for every 24 hours while dial l9 will be rotated one revolution for every '7 days. Since the means of changing the speed of operation of the two dials is only a matter of the gear ratio drive to these dials, it is not a part of this invention and they have been shown schematically, omitting the driving means.

It is apparent that normally the circuit is controlled through switch 22, as it will be closed every part of the rotation of dial [8. Therefore, it will be open and closed depending upon r the position of the off and on switches 25 and '26 mounted on dial l8. Since the 7-day operated dial [9 is generally positioned to operate for a weekend period the only time that switch 23 will take over will be upon the closing of switch 23 at the beginning of a weekend period by the on switch on dial l9. Thus the opening and closing of switch 22 will have no efiect on the circuit already closed, but when switch 23 is again opened, dial l8 again takes over control to open and close switch 22 and control the circuit as already described.

What is claimed is:

1. In a burglar alarm device, a source of potential, a transformer connected on one side to said source of potential, an electric motor driven chronometer, a switch interposed between the opposite side of said transformer and the opposite side of said source of potential, means to open and close said switch with said chronometer, a secondary circuit connected to the secondary coil of said transformer, one side of said secondary coil being connected to a pair of connector plugs, the opposite side of said secondary coil being connected through a relay and the normally closed switch of a second relay to the opposite side of said pair of connector plugs, a connector link inserted in one of said connector plugs to complete said secondary circuit, said first relay being energized by said secondary circuit and retaining a plurality of normally closed switches associated therewith in an open position, a lamp connected across said secondary circuit to be illuminated when said secondary circuit is energized, means to momentarily de-energize said secondary circuit by removing said connector link, and in turn deenergizing said first relay, which restores said relay switches to their normally closed position, means to energize said second relay when the said first relay is de-energized and reestablish said secondary circuit, means to break the normally closed switch of said second relay, and means to establish said alarm circuit through a third relay, said third relay when energized closing three normally open switches, said normally open switches being connected on one side to the main source of potential and on their opposite sides to individual connector plugs, said connector plugs in turn being connected to the opposite side of the source of potential, a reset switch providing means to deenergize said second relay and re-establish energization of said first relay to in turn retain said secondary circuit energized through the connector link mounted in said connector plug.

2. A device according to claim 1 in which a lamp is connected across the motor circuit to indicate when the chronometer is operating.

3. A device according to claim 1 in which a lamp is connected across the alarm circuit to be illuminated when the first relay is momentarily de-energized and the alarm circuit completed.

4. In a device according to claim 1 a second electric motor driven chronometer and. a second switch operated by said chronometer, said first and second switches pivotally mounted in a predetermined position with relation to said disks, a cam connected to said switch at its pivotal point, said motor connected to said source of potential, said second switch connected in parallel with the first switch, one side of each switch connected to one side of the primary coil of said transformer and on their opposite sides to the opposite side of the source of potential, means to energize said secondary circuit with the closing of the first switch, and means to energize said secondary circuit with the closing of the second switch.

5. In a device according to claim 4 a pair of chronometer disks, each disk driven by its associated motor, said first disk rotated on revolution for 24 hours, and said second disk rotated one revolution for seven days, two pair of lugs attachable to the periphery of said disks, one of each pair of lugs provided with an on pin and the other lugs of each pair provided with an off pin, means to position said lugs at any pre-determined time position on the periphery of said disks, means to close said associated switch when said on pin contacts the cam of said switch during the rotation of said disks, means to open said switch when the oif pin contacts the cam of said switch during the rotation of said disks.

FRANK A. FOSS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,772,422 Hopkins et al Aug. 5, 1930 2,224,548 McFerron Dec. 10, 1940

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