Alarm device for indicating lack of motion

• US 3,163,856 A
• Filed: 11/14/1961
• Issued: 12/29/1964
• Est. Priority Date: 11/14/1961
• Status: Expired due to Term

• Current Assignee: Frederick G. Kirby
• Original Assignee: Frederick G. Kirby
• Inventors: Kirby, Frederick G.
• Application Number:
  US04/152,309
• Time in Patent Office: 1,141 Days
• US Class Current: 340/526
• CPC Class Codes: G08B 21/0415 detecting absence of activity per se
• CPC Class Codes: H01H 35/00 Switches operated by change of a physical condition operated by change of magnetic or electric field H01H36/00; thermally-actuated switches H01H37/00
• CPC Class Codes: Y10S 128/903 Radio telemetry

Claims

1. ALARM DEVICE FOR INDICATING LACK OF MOTION OF AN EXTERNAL PORTION OF A PERSON'"'"''"'"'S BODY, COMPRISING, IN COMBINATION:

A CASING STRUCTURE ADAPTED TO BE ATTACHED TO AN EXTERNAL PORTION OF A PERSON'"'"''"'"'S BODY;

A RADIO FREQUENCY TRANSMITTER INCORPORATED WITHIN SAID CASING STRUCTURE;

A SOURCE OF ENERGY FOR TRIGGERING SAID TRANSMITTER DISPOSED IN SAID CASING STRUCTURE;

INERTIAL RESPONSIVE ELECTRICAL CONTACT MEANS IN SAID CASING STRUCTURE RESPONSIVE TO RANDOM MOVEMENT OF SAID CASING STRUCTURE RESULTING FROM RANDOM MOVEMENT OF SAID PORTION OF SAID PERSON'"'"''"'"'S BODY TO CONNECT SAID SOURCE TO SAID TRANSMITTER AND EFFECT TRIGGERING OF SAID TRANSMITTER TO EFFECT WIRELESS TRANSMITTING OF SIG-