US1031951A - Burglar-alarm. - Google Patents

Description

M. T. MORGAN.

BURGLAR ALARM.

APPLICATION FILED NOV. 7, 1911.

1,031,951 Patented July 9, 1912.

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MORGAN 'I. MORGAN, OF ANACONDA, MONTANA.

BURGLAR-ALARM.

Application filed November 7, 1911.

To all whom it may concern:

Be it known that I, MORGAN T. MoRGArI, a citizen of the United States, and a resident of Anaconda, in the county of Deerlodge and State of Montana, have invented certain new and useful Improvements 1n Burglar-Alarms, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements in portable burglar alarms.

One object of the invention is to provide a burglar alarm which may be readily packed in a valise, hand satchel or the like and conveniently carried from place to place by the traveling public.

Another object is to provide a burglar alarm having means whereby the same may be attached to the key of a door and the key thus prevented from being turned in the lock from the outside of the door, and whereby any attempt to turn the key will sound the alarm.

With these and other objects in view the present invention consists in the combination and arrangement of parts as will be hereinafter more fully described and finally pointed out in the appended claims, it being further understood that changes in the specific structure shown and described may be made within the scope of the claims, without departing from the spirit of the invention.

In the accompanying drawings forming a part of this specification and in which like numerals of reference indicate similar parts in the several views: Fig. 1, is a side view of a portion of a wall and the inner side of a door illustrating the application of my improved burglar alarm, and show ing the same in an operative position. Fig. 2, is a similar view showing the manner in which the device is operated to sound the alarm. Fig. 3, is a detail perspective view of a key showing the manner in which the key fastening and alarm supporting lever is engaged therewith.

In the embodiment of the invention, I provide a key fastening and alarm supporting bar or lever 1, having one end bent or offset to a slight extent, as shown at 2, to prevent the same from slipping out of the key when engaged therewith. At its op posite end the bar 1, is bent to form an eye 3. Attached to the eye 3 by a link 4 or in any suitable manner, is an alarm bell 5 Specification of Letters Patent.

Patented July 9, 1912.

Serial No. 658,969.

which may be of any suitable form, but which is preferably of the bicycle type of bell, haring a lever and ratchet operated clapper. To the clapper operating lever G of the bell is secured the upper end of a chain or other flexible connection 7, the opposite end of which is connected to a weight 8 which rests on the floor or other support. For the weight 8, any suitable and convenient object, such as a satchel or a valise, may be employed, as shown in the drawing. The end of the chain is provided with a hook 9, and in attaching the chain to the valise or weight, the end of the chain is looped through the handle or other opening in the valise or weight, and the hook 9 engaged with one of the links of the chain, thus forming an adjustable connection between the lever 1 and the weight to permit the application of the device to doors having their key holes at different heights.

In applying my improved burglar alarm, the offset end of the lever is engaged with the hole in the handle of the key after the latter has been turned to lock the door. The free end of the chain is then engaged with the weight, and the chain adjusted in the manner described, until taut or until all slack is taken up, as shown in Fig. 1 of the drawings. When the parts have been thus arranged, any attempt to turn the key from the outside of the door will result in lifting the outer end of the lever or bar 1, and the bell against the resistance of the weight and chain. This resistance will operate the lever 6 of the bell, thus sounding an alarm. When the lever 6 has been swung down in this manner to its greatest extent, as shown in Fig. 2 of the drawing, the resistance of the weight will prevent further movement of thelever which will securely hold the key against further turning in the lock. By this arrangement of the alarm it will be seen that even though the sounding of the bell does not arouse the occupant of the room, the door cannot be unlocked from the outside.

It will be noted that while my improved burglar alarm and key fastener is practical and reliable in operation, it is at the same time small and of extremely simple construction and may be folded together in compact form and readily placed in a hand satchel or valise, or carried in the pocket. It will also be noted that the device is always ready for immediate application to any key having an opening therein suitable for receiving the alarm supporting lever.

From the foregoing description taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood wit-hout requiring a more extended explanation.

Various change: in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advan tages of .he invention as claimed.

Having thus described my said invention, What I claim as new and desire to secure by United States Letters Patent is:

1. A burglar alarm for doors, comprising an alarm supporting lever adapted to be engaged with the key of the door, an alarm secured to and supported on the free end of the lever and means whereby the alarm is sounded by the movement of the key.

2. A burglar alarm comprising a key fastening and alarm supporting lever, a bell suspended from said lever, said bell having a clapper operating lever, a weight, and means to connect said weight with the lever whereby the resistance offered by the weight against the turning of the key actuates said clapper operating lever and sounds the alarm.

3. A burglar alarm comprising a key fastening and alarm supporting lever, a bell suspended from said lever, said bell having a clapper operating lever, a weight, and a flexible and adjustable connection between said weight and said clapper operating-lever whereby the resistance offered by the weight when the key is turned actuates said clapper operating lever and sounds the hell.

4. A burglar alarm and key fastening de vice comprising a key fastening and alarm supporting lever having an offset key engaging end adapted to be engaged with the opening in the handle of the key, an eye formed in the outer end of said lever, a lever operated bell suspended from said eye, and means attached to the operating lever of the bell whereby the latter is held against the movement of the key and the alarm supporting lever thereby actuating said bell operating lever and sounding the hell.

5. A burglar alarm and key fastening device, comprising a key fastening and alarm supporting lever having an offset key engaging end adapted to be engaged with the opening in the handle of the key, an eye formed in the outer end of said lever, a lever operated bell suspended from said eye, a weight, a chain secured to the clapper operating lever of the bell, and a hook secured to the free end of the chain, said hook and the end of the chain being loosely engaged with the weight and the hook then engaged with one of the links of the chain whereby the latter is adjusted to vary the length thereof.

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

MORGAN T. MORGAN.

-Witnesses Lnwrs J ONES, EVAN JONES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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