The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 1978
Filed:
Jun. 20, 1975
Applicant:
Inventor:
Tsuyoshi Satoh, Inazawa, JA;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
179 82 ; 325 28 ; 329200 ; 336220 ;
Abstract
A signal transmitter supplies a contact closure type signal having a DC level to an electromagnetic coil inductively disposed around a magnetic core. The coil produces a corresponding magnetic flux which is, in turn, detected by a flux detector such as a Hall effect semiconductor element. The detector applies a signal corresponding to the detected magnetic flux to a signal receiver.