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:
May. 20, 1986
Filed:
May. 07, 1984
Jack Washbourn, Chippenham, GB;
Westinghouse Brake and Signal, Wiltshire, GB;
Abstract
A force-applying system is provided which combines a first direct electric actuator and a second, electrically controlled spring-applied actuator. The output force-applying member of the second actuator is operable through a force-transfer device one member of which is operatively loaded by the force-applying spring of the second actuator and another member of which is controlled by a solenoid. The operation is such that when the solenoid is energized, the members are out of engagement and when the solenoid is de-energized, the two members are engaged so as to operatively connect the spring to the output member. The solenoid and the electric motor of the direct actuator are controlled through an electrical circuit which ensures that the electric motor of the direct actuator is de-energized when the solenoid is de-energized.