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:
Sep. 30, 1980
Filed:
Jan. 31, 1978
Terumi Nakazawa, Ibaraki, JP;
Hitoshi Minorikawa, Ibaraki, JP;
Kazutoshi Kobayashi, Ibaraki, JP;
Hiromitsu Nagae, Ibaraki, JP;
Tomoji Inui, Ibaraki, JP;
Hitachi, Ltd., , JP;
Abstract
This invention relates to an ignition device of the type wherein a pickup coil for making a signal synchronous with the engine revolution is disposed within a distributor, an amplifier circuit for amplifying the output of the pickup coil and a power transistor for controlling the primary coil current of an ignition coil are arranged in a circuit unit under hybrid IC and chip states respectively, and the circuit unit is mounted on a side surface of a housing of the distributor. A highly waterproof structure has been found necessary in order that the insulation between the housing and pickup terminals as well as connectors for coupling the pickup coil and the amplifier circuit and the insulation between the terminals may be prevented from degrading due to moisture. To this end, a protuberance which projects from the circuit unit into the housing is disposed in a manner to surround the pickup terminals.