Ice detector

• US 3,341,835 A
• Filed: 11/05/1964
• Issued: 09/12/1967
• Est. Priority Date: 11/05/1964
• Status: Expired due to Term

• Current Assignee: Earl A. Grindheim, Frank D. Werner
• Original Assignee: Earl A. Grindheim, Frank D. Werner
• Inventors: Werner, Frank D., Grindheim, Earl A.
• Application Number:
  US04/409,115
• Time in Patent Office: 1,041 Days
• US Class Current: 340/582
• CPC Class Codes: B64D 15/20 Means for detecting icing or initiating de-icing
• CPC Class Codes: G01N 2291/0251 Solidification, icing, curing composites, polymerisation
• CPC Class Codes: G01W 1/14 Rainfall or precipitation gauges measuring volume in general G01F
• CPC Class Codes: G08B 19/02 Alarm responsive to formation or anticipated formation of ice

Claims

1. AN ICE DETECTOR COMPRISING A NODAL SUPPORT FORMING A DIVIDING SURFACE, A VIBRATING ELEMENT HAVING A NODE OF VIBRATION WHEN IT IS RESONATELY VIBRATED, THE NODAL SUPPORT BEING ATTACHED TO SAID VIBRATING ELEMENT SUBSTANTIALLY AT SAID NODE OF VIBRATION AND FORMING AT LEAST SUBSTANTIALLY THE ENTIRE SUPPORT OF SAID VIBRATING ELEMENT, SAID VIBRATING ELEMENT HAVING REAR AND FRONT PORTIONS, EACH PORTION EXTENDING AWAY FROM SAID NODAL SUPPORT, SAID ELEMENT BEING CAPABLE OF BEING LOCATED BY SAID SUPPORT WITH AT LEAST A PART OF THE FRONT PORTION POSITIONED IN A ZONE WHEREIN ICE MAY ACCUMMLATE THEREON, VIBRATING MEANS MOUNTED ADJACENT THE REAR PORTION FOR EXCITING THE VIBRATING ELEMENT INTO RESONANT VIBRATION, AND MEANS FOR SENSING A SHIFT OF THE RESONANT FREQUENCY OF VIBRATION OF SAID VIBRATING ELEMENT RESULTING FROM A CHANGE OF MASS OF SAID VIBRATING ELEMENT DUE TO ICE ACCUMMLATING THEREON.