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. 09, 1996
Filed:
Apr. 13, 1995
Oded E Sturman, Newberry Park, CA (US);
Benjamin Grill, Northridge, CA (US);
Lynn Harrison, Newhall, CA (US);
Edwin Hunter, Rancho Santa Fe, CA (US);
Other;
Abstract
A Chatterless AC Solenoid without pole shading is disclosed. The solenoid has a stationery member and a moveable member forming a magnetic circuit having a small but predetermined gap in the magnetic circuit when the moveable member is in the solenoid actuated position, and a much larger gap when the moving member is in the unactuated position. Both the stationery member and the moveable member are fabricated from a relatively soft magnetic material, with a coil associated with the stationery member providing a magnetizing force for the resulting magnetic circuit responsive to a current in the coil. A first diode in the energizing circuit provides halfwave rectification of the AC excitation voltage, with a second diode across the coil leads providing a conduction path for the portion of the excitation cycle during which the first diode is not conducting, thereby adequately sustaining the magnetizing current in the coil to maintain the solenoid latched until the coil is again reenergized by current flow through the first diode. Alternate embodiments and various features of the invention are disclosed.