Self actuating wallet alarm

• US 3,930,249 A
• Filed: 06/21/1974
• Issued: 12/30/1975
• Est. Priority Date: 06/21/1974
• Status: Expired due to Term

• Current Assignee: Howard A. Steck, Ronald J. Divito
• Original Assignee: Howard A. Steck, Ronald J. Divito
• Inventors: Steck, Howard A., DiVito, Ronald J.
• Primary Examiner(s): Yusko, Donald J.
• Assistant Examiner(s): Wannisky, William M.
• Application Number:
  US05/481,531
• Time in Patent Office: 557 Days
• Field of Search: 340/280,283 150/.5,34 250/215
• US Class Current: 340/571
• CPC Class Codes: G08B 13/1481 with optical detection

Abstract

A wallet or the like having incorporated therewith an electronic circuit capable of emitting an audible alarm when the same is removed from an owner'"'"''"'"'s purse or pocket.

Claims

1. A wallet alarm device comprising:

an alarm system including alarm means operative to produce an alarm signal;

a case having a portion thereof for retaining said alarm means; and

said alarm system including receiving means responsive to sense pre-selected variations of electromagnetic radiation and effective to actuate said alarm means to product said alarm signal upon sensing said pre-selected variation of electromagnetic radiation; and

said alarm system comprising an electronic circuit having a pair of quasi-complementary coupled transistors coupled between said receiving means and said alarm means to provide a high out put to said alarm means notwithstanding substantial impedance mismatching between said circuit and said alarm means.

2. The invention as recited in claim 1 wherein said receiving means comprising a photo-electric cell coupled to said circuit and having electrical properties which vary in response to sensing pre-selected ranges of electromagnetic radiation.

3. The invention as recited in claim 2 wherein said electronic circuit comprises an oscillator actuated by said photo-electric cell;

said alarm means comprises a speaker coupled to said oscillator, said oscillator driving said speaker to produce an audible signal upon said photo-electric cell sensing.

4. A wallet alarm device capable of being carried by a person in an enclosure, comprising:

an alarm circuit operative to produce an alarm signal;

a wallet having a pouch for releasably retaining said alarm circuit;

said alarm circuit comprising a photo-electric cell responsive to pre-selected variations in electromagnetic radiation and operative to actuate said circuit to produce said signal upon sensing said variations in electromagnetic radiation upon removal from said enclosure; and

said alarm circuit including alarm means and a pair of quasi-complimentary coupled transistors coupled between said photo-electric cell and said alarm means to provide a high out put to said alarm means notwithstanding substantial impedance mismatching between said circuit and said alarm means.

5. The invention as recited in claim 4 wherein said alarm circuit comprises an oscillator circuit and a speaker coupled to said oscillator;

said photo-electric cell coupled to said oscillator circuit and effective to actuate said oscillator circuit upon sensing said pre-selected variations in electromagnetic radiation, and said oscillator circuit operative to drive said speaker to produce an audible alarm signal.

6. The invention as recited in claim 5 wherein said photo-electRic cell has electric properties which vary in response to sensing changes in magnitudes of electromagnetic radiation within the visible light range, wherein said oscillator circuit is actuated in response to variation in said electrical properties of said photo-electric cell.

7. The invention as recited in claim 6 wherein said oscillator circuit comprises a charging circuit and a transistor operatively coupled to produce an oscillating electrical output within the audible frequency range.

8. The invention as recited in claim 7 wherein said charging circuit comprises at least one resistor and capacitor, said resistor and capacitor operatively coupled to said transistor and having parameters to effect said output within the audible frequency range.

9. The invention as recited in claim 7 where said pouch includes an aperature disposed to register with said photo-electric cell and said speaker to expose the same to the exterior thereof.

10. The invention as recited in claim 7 wherein said alarm circuit comprise a replacable battery operative to energize said circuit.