Hall effect proximity transducer

• US 3,195,043 A
• Filed: 05/19/1961
• Issued: 07/13/1965
• Est. Priority Date: 05/19/1961
• Status: Expired due to Term

• Current Assignee: Edward A. Petrocelli, Robert G. Burig
• Original Assignee: Edward A. Petrocelli, Robert G. Burig
• Inventors: Burig, Robert G., Petrocelli, Edward A.
• Application Number:
  US04/111,311
• Time in Patent Office: 1,516 Days
• US Class Current: 324/235
• CPC Class Codes: G01D 5/147 influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other

Claims

1. A PROXIMITY TRASDUCER INCLUDING, A HALL GENERATOR DEVICE OPERATIVE TO PROVIDE AN OUTPUT SIGNAL PROPORTIONAL TO THE PRODUCT OF THE CURRENT AND MAGNETIC FIELD APPLIED THERETO, MEANS FOR APPLYING CURRENT TO SAID DEVICE, MAGNETIC MEANS OPERATIVE TO PROVIDE A MAGNETIC FIELD ACROSS SAID DEVICE, SAID MAGNETIC MEANS INCLUDING A PERMANENT MAGNET AND A TAPERED POLE PIECE COMPRISING A SOFT MAGNETIC MATERIAL HAVING LOW RESIDUAL MAGNETISM, MONOSTABLE SWITCHING MEANS NORMALLY PROVIDING NO OUTPUT AND BEING OPERATIVE TO CHANGES STATES WHEN ACTUATED TO PROVIDE AN OUTPUT, AND SENSING MEANS OPERATIVE TO ACTIVATE SAID SWITCHING MEANS TO ITS OUTPUT STATE WHEN THE MAGNETIC FIELD THROUGH SAID HALL GENERATOR DEVICE IS CONCENTRATED ABOVE A PREDETERMINED MAGNETIC FIELD STRENGTH BY THE PRESENCE OF AN OBJECT DESIRED TO BE DETECTED, SAID SENSING MEANS INCLUDING A ZENER DIODE BEING OPERATIVE TO BREAKDOWN WHEN THE OUTPUT SIGNALS OF SAID HALL GENERATOR DEVICE EXCEED A PREDETERMINED VALUE IN RESPONSE TO AN INCREASE IN MAGNETIC FIELD STRENGTH.