US1719085A - Burglar-alarm switch - Google Patents

Description

July 2, 1929. G. E. SAMSEL BURGLAR ALARM SWITCH Filed Aug. 22, 1927 2 Sheets-Sheet 1 Patented July 2, 1929.

UNITED STATES GEORGE E. SAMSEL, OF MELVERN, KANSAS.

BURGLAR-ALARM SWITCH.

Application filed August 22, 1927. Serial No. 214,670.

This invention aims to provide a burglar alarm, adapted to be used in many different ways, and soconstructed that when an ob ject of any desired kind is moved, an audible signal will be given.

It is within the'province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

lVith the above and otherobjects in view which'will appear as the description proceeds, the invention. resides in the combina-' tion and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings Figure 1 shows in front elevation, a p0rtion of asafe wherein the device forming the subject matter of this application has been mounted, parts appearing in section;

Figure 2 is a section on the line 22 of Figure 1;

Figure 3 is a section on the line 3 Figure 1;

Figure 4 is a section on the line 44 of Figure 3;

Figure 5 is a circuit diagram.

The device forming the subject matter of this application may be used in many different ways, and as to the practical application of the invention, much is left to the desires and necessities of the user. In the present instance, and by way of illustration, but not of necessity, the device is embodied in a safe 1. The safe need not be described in great detail, but, so far as material, the safe 1 includes a bottom 2 and a front wall 3. A vertical partition 4 extends upwardly from the bottom 2, and a platform. 5 extends hori- Zontally from the intermediateportion of the partition 4 to one side wall of the safe. A hingedly mounted door 6, located on the opposite side of the partition 4 from the platform 5, but in the same plane with the platform, rests upon a shoulder 7 formed on the front wall 3, as shown in Figure 4. The parts above specified form a battery chamber 8, and a compartment 9 for the switch mechanism (hereinafter described), the compartment 9 being located at one side of the battery chamber 8, as shown in Figure 1, there being a storage space 10in the safe, above the compartment 9.

A base plate 11 is mounted on the bottom 2 and is located. in the compartment 9. A ball bearing 12 is secured to the base plate 11. A vertically swinging lever 14, in the form of a plate, is provided, and thelever 14 is supplied with a depending inverted U-shaped bracket 15 carrying a shaft 16 mounted in the ball bearing 12, the construction being such that the lever 14 is fulcrumed intermediate its ends for vertical swinging movement. An insulated switch terminal 17, in the form of a pedestal, is mounted on one end of the base plate 11, and is adapted to cooperate with an insulating switch terminal 18 on one end of the lever14. The lever 14 carries an off-set calibrated rack 19 on which a weight 20 is adjustable, longitudinally of the lever, the weight 20 being held in place bya set screw 21, threaded into the weight, and adapted to bear upon the rack 19. The weight 20 serves to tilt the lever 14,- so that the terminal 18 may come into contact with the terminal 17 thereby to close the signal circuit hereinafter described.

A plunger or operating member 22 is slidable in the platform 5 and is provided at its upper end with an enlarged head 24, the lower end of the plunger 22 being adapted to cooperate with a buffer 23 on one end of the lever 14. Downward movement of the said end of the lever 14 is limited by a stop 27 mounted on the base plate 11 and adapted to engage the said end of the lever. In the compartment 9, at one side of the switch mechanism above described, is located. an audible signal 28, which may be a horn, A battery 29 is disposed in the battery chamber 8, below the hinged door 6. From one side of the battery 29, a conductor 30 leads to a switch 31 mounted in the partition 4 and located below the door 6. A conductor 32 extends between the switch 31 and the switch terminal 18 on the lever 14. From the switch terminal 17 on the base plate 11, a conductor 33 leads to the signal 28, and the signal 28 is connected to the battery 29 by a conductor 34.

In practical operation, the manually operable switch 31 is closed, and a tray or other object, shown at 26, is placed on cleats 25 in the storage space 10. The object 26 depresses the operating member or plunger 22, and the lever-14 is tilted until one end of the lever engages the stop 27, the switch terminals 17 and 18 being spaced apart, and the signal circuit being open at the terminals 17 and 18. If a person removes the object shown at 26, then the lever 14 tilts under.

the actuation of the weight 20, and the terminal 18 is carried down upon the terminal 17, the simple signal circuit being closed, and the signal 28 being caused to sound. In this way, watchmen or others who happen to be about, will be admonished that the object shown at 26 is being removed, and will govern themselves accordingly. I

A person familiar with the operation of the device can raise the hinged door 6 and operate the switch 81;, to open the signal circuit, thereby to prevent the horn 28 from sounding, even though there be no object in contact with the plunger 22, and even though the lever 14 may have tilted to bring the terminals 18 and 17 togetl'ier. The switch 31 is located below the door 6 and is concealed, s0 that a person unfamiliar with the operation of the device, and desiring to steal the object shown at 26, will not be likely to open the circuit by the manipulation of the switch 31, before removing the object indicated at 26. Owing to the presence of the adjustable weight 20, a quick closing together of the terminals 18l7 is assured, and a proper adjustment may be efiected so that the right-hand end of the lever 14: in Figure 1 may not swing downwardly and close the signal circuit, if the objectengaging the upper end of the plunger 22 happens to be light.

WVhat is claimed is:

In a device of the class described, a lever, a rack extended longitudinally of the lever and secured thereto, a weight slidable for adjustment along the rack, the rack being offset laterally from the lever thereby to offset the weight laterally from the rack and to render the weight accessible for adjustment along the rack, a stop underneath one end of the lever, cooperating switch terminals underneath the opposite end of the lever, one switch terminal being fixed, and the other switch terminal being mounted on the lever, a bearing supported underneath the lever, a depending U-shaped bracket secured to the intermediate portion of the lever and elevating the lever to afford room beneath it for the stop, the switch terminals, and, the bearing, the bracket straddling the bearing and having its lower ends engaged with opposite sides of. the bearing thereby to afford a steady fulcrum-support for the lever notwithstanding the aforesaid offsetting of the rack and the weight.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature.

GEORGE E. SAMSEL.

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