Vibrating reed frequency responsive device

• US 3,336,529 A
• Filed: 12/03/1962
• Issued: 08/15/1967
• Est. Priority Date: 12/03/1962
• Status: Expired due to Term

• Current Assignee: William H. Tygart
• Original Assignee: William H. Tygart
• Inventors: Tygart, William H.
• Application Number:
  US04/241,979
• Time in Patent Office: 1,716 Days
• US Class Current: 324/173
• CPC Class Codes: G01P 3/14 by exciting one or more mechanical resonance systems
• CPC Class Codes: G01P 3/4802 by using electronic circuits in general
• CPC Class Codes: G01R 23/02 Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
• CPC Class Codes: H10N 30/302 Sensors

Claims

2. A FREQUENCY RESPONSIVE DEVICE COMPRISING:

A TACHOMETER FREQUENCY GENERATOR FOR SENSING THE SPEED OF A ROTATING SHAFT INITIATING A VARIABLE FREQUENCY SIGNAL WHICH VARIES FROM A BASE FREQUENCY AS A FUNCTION OF THE CHANGE IN SPEED OF THE SHAFT FROM A PREDETERMINED SPEED;

A FREQUENCY DISCRIMINATOR INCLUDING TWO CANTILEVER MOUNTED REED ASSEMBLIES EACH MECHANICALLY RESONANT TO FREQUENCIES EQUALLY DISPOSED ON EACH SIDE OF SAID BASE FREQUENCY AND HAVING OVER-LAPPING FREQUENCY RANGES TO WHICH THEY ARE VIBRATIONALLY RESPONSIVE;

MEANS FOR VIBRAT-