Valve cap transmitter

• US 3,111,644 A
• Filed: 06/05/1962
• Issued: 11/19/1963
• Est. Priority Date: 06/05/1962
• Status: Expired due to Term

• Current Assignee: Ronald W. Froelich, Walter F. Froelich
• Original Assignee: Ronald W. Froelich, Walter F. Froelich
• Inventors: Froelich, Ronald W., Froelich, Walter F.
• Application Number:
  US04/200,120
• Time in Patent Office: 532 Days
• US Class Current: 340/447
• CPC Class Codes: B60C 23/0433 Radio signals

Claims

4. A VALVE CAP TRANSMITTER ADAPTED TO BE RECEIVED IN AIR TIGHT MOUNTING ON A VALVE COMMUNICATING WITH THE INTERIOR OF A NON-METALLIC CONTAINER FOR A FLUID UNDER A PRESSURE SUBSTANTIALLY DIFFERENT FROM EXTERNAL AMBIENT PRESSURE, SAID VALVE CONTAINING A MOVABLE VALVE-OPENING BODY, WHICH VALVE CAP TRANSMITTER INCLUDES:

A VALVE CAP FOR AIR TIGHT MOUNTING ON SAID VALVE;

A PRESSURE CHAMBER MOUNTED ON SAID VALVE CAP, SAID PRESSURE CHAMBER HAVING RIGID METALLIC WALLS;

A RADIO TRANSMITTER MOUNTED ON SAID PRESSURE CHAMBER, EXTERIOR TO ITS METALLIC WALLS AND HAVING A FIRST TERMINAL CONNECTED TO SAID METALLIC WALLS;

A TUBULAR VALVE ACTUATOR MOUNTED IN SAID CAP AND ADAPTED TO ENGAGE SAID MOVABLE VALVE OPENING BODY TO OPEN SAID VALVE WHEN SAID CAP IS MOUNTED ON SAID VALVE, SAID TUBULAR VALVE ACTUATOR PROVIDING A PASSAGE FOR FLUID BETWEEN SAID OPEN VALVE WITHIN SAID CAP TO THE INTERIOR OF SAID PRESSURE CHAMBER;

AN ANTENNA MEANS COMPRISED OF AN ANTENNA EXTENDING INTO THE INTERIOR OF SAID NON-METALLIC CONTAINER, AND AN ANTENNA CONNECTION MEANS PASSING THROUGH SAID MOVABLE VALVE-OPENING BODY TO THE INTERIOR OF SAID VALVE CAP FOR CONTACT WITH SAID VALVE ACTUATOR;

INSULATING MEANS BETWEEN SAID VALVE ACTUATOR AND SAID METALLIC WALLS OF SAID PRESSURE CHAMBERS;

A PRESSURE SWITCH IN SAID VALVE CHAMBER FOR CLOSING AN ELECTRICAL CIRCUIT IN RESPONSE TO DIFFERENCE IN PRESSURE BETWEEN THE INTERIOR AND EXTERIOR OF SAID PRESSURE CHAMBER;

VALVE SWITCH MEANS IN SAID VALVE CAP FOR CONNECTING SAID PRESSURE SWITCH TO SAID PRESSURE CHAMBER WALLS WHEN SAID VALVE CAP IS MOUNTED ON SAID VALVE;

AND ELECTRIC CIRCUIT MEANS FOR PLACING SAID TRANSMITTER IN OPERATION BY CONNECTION OF SAID FIRST TRANSMITTER TERMINAL TO A SECOND TRANSMITTER TERMINAL THROUGH SAID PRESSURE CHAMBER WALLS, SAID VALVE SWITCH MEANS, AND SAID PRESSURE SWITCH.