Sound activated alarm system

• US 4,001,805 A
• Filed: 04/03/1975
• Issued: 01/04/1977
• Est. Priority Date: 04/03/1975
• Status: Expired due to Term

• Current Assignee: Alvin V. Golbe
• Original Assignee: Alvin V. Golbe
• Inventors: Golbe, Alvin V.
• Primary Examiner(s): Caldwell, John W.
• Assistant Examiner(s): Wannisky, William M.
• Application Number:
  US05/564,759
• Time in Patent Office: 642 Days
• Field of Search: 340/416, 340/276, 340/274, 340/261, 340/227 R, 340/148, 340/280, 116/67 R, 116/75
• US Class Current: 340/527
• CPC Class Codes: G08B 13/08 by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
• CPC Class Codes: G08B 13/14 by lifting or attempted removal of hand-portable articles

Abstract

The present invention is in an alarm system including a sound generator, a sound responsive switching circuit and an alarm. The sound generator includes an element capable of snapping rapidly from one position to another upon change in a monitored condition. The switching circuit includes a sound activated switch which is energized in response to a sound of predetermined frequency eminating from the sound generator. This creates an electrical signal that passes through the switching circuit to actuate the alarm. The alarm may be audible and/or visual and the sound activated switch after a predetermined time may deenergize the audible alarm. The sound generator is positioned at the location where the change in condition is to be sensed. All other parts of the system are adapted to be spaced remotely therefrom. The condition which is monitored may include the entry into a building, the removal of objects from their normal position or an increase in temperature within a premises, all of which result in actuation of the sound generation and subsequent energization of the switching circuit and alarm.

Claims

1. An alarm system for monitoring and responding to removal of an object from its proper place comprising:

a. a portable generator means for positioning between said object and an associated fixed support for the object, said generator means including;

1. a base,

2. a blade fixed at one end to the base with its other end free and normally disposed in a first position extending at an acute angle away from the base and movable to a second position engaging said base, said blade being armed upon restraining said free end in said second position by positioning between said object and support, said blade further being mechanically formed for generating an audible sound having a predetermined frequency upon movement of its free end from said second position to said first position upon removal of said object from said support;

b. circuit means including a source of electrical power;

c. signal means connected into said circuit means and responsive to said audible sound for providing an electrical output, said signal means being disposed remotely of said generator means; and

d. alarm means for signalling the removal of said object from said support, said alarm means included within said circuit means for actuation from a first state to an alarm state under control of said signal means.

2. The alarm system of claim 1 wherein:

a. said blade is of metal construction and dimpled intermediate its ends for generating said sound.

3. The alarm system of claim 2 wherein said alarm means includes:

a. an audible alarm horn.

4. The alarm system of claim 3 wherein said alarm means further includes:

a. a visual alarm light.

5. The alarm system of claim 4 wherein said circuit means includes:

a. a normally open switch connecting said light to said source of power; and

b. relay means operable to close said switch, said relay means being under control of said signal means.

6. The alarm system of claim 5 including:

a. a timer connected in said circuit means and operable after a predetermined period of time to deactivate said audible alarm to said first state.

7. The alarm system of claim 6 wherein:

a. the normally open switch is disposed within said circuit means between the timer and the source of power to supply power to said light independently of subsequent operation of said time.