Title:
PIEZOELECTRIC DRIVE DC RETAINING TYPE RELAY
Document Type and Number:
Japanese Patent JPS614129
Kind Code:
A
Abstract:
A direct current latching relay comprised of bender-type piezoelectric drive members each of which is a three terminal member formed of two piezoelectric plate elements separated by a conductive plane. Each piezoelectric plate element is separately electrically charged with an input pulsed d.c. switching signal of the same polarity as the pre-poling field previously induced in the piezoelectric plate element. By electrically charging one of the piezoelectric plate elements with a switching signal electric field of the same polarity as the pre-poling field, the bender-type drive members are member made to bend in one direction. Alternatively, by charging the opposite plate of the drive member again with a direct current electric charging field of the same polarity as the pre-poling field previously induced in the plate, the bender-type drive member can be caused to bend in the opposite direction. The bender-type peizoelectric drive member whe bent engages and drives a push rod which actuates a snap-action switching contact mechanism from either an open circuit state or to a closed circuit state or vice versa. Pulsed direct current charging fields are applied to the piezoelectric plate element of the bender-type drive member and a high resistance discharge resistor is connected across each of the piezoelectric plate members so asto automatically dischargethe plate members shortly after their excitation. As a result, no long term depolarization of the piezoelectric plate members occurs and because of the pulsed short term nature of the charging fields, no long term deformation (creep) develops in the plate elements over extended periods of usage of the relay.
More Like This:
| JPH03145028 | RELAY DRIVE CIRCUIT AND VOLTAGE CONTROL METHOD |
| JPS6012631 | DRIVE CIRCUIT OF LATCHING RELAY |
Inventors:
KAAMAN PIITAA JIYAAMEINO
Application Number:
JP12596685A
Publication Date:
January 10, 1986
Filing Date:
June 10, 1985
Export Citation:
Assignee:
GEN ELECTRIC
International Classes:
H01H47/22; H01H57/00; (IPC1-7): H01H47/22; H01H57/00
Domestic Patent References:
| JP44029812A | ||||
| JPS56170855U | 1981-12-17 |
Attorney, Agent or Firm:
Tadao Hirata
Next Patent: MULTI-MEDIUM MULTIPLEXING COMMUNICATION SYSTEM