Title:
VIBRATION-SENSITIVE POWER CUT-OFF DEVICE FOR OIL-FEEDING APPARATUS
Document Type and Number:
Japanese Patent JP3671989
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To keep the state of power cut-off regardless of breakage at relays constituting a power cut-off device.
SOLUTION: A first relay 30 equipped with one constantly-closed contact 31 and two constantly-opened first and second contacts 32 and 33, a second relay 40 equipped with constantly-opened first, second and third contacts 41, 42 and 43, and a vibration-sensitive switch 50 for opening the contacts, being responsive to vibrations, are provided. The second relay 40 is energized through the constantly-closed contact 31 and the vibration-sensitive switch 50, and electric power is supplied to a control device 8 through the constantly-opened second contact 33 of the first relay 30 and the constantly-opened third contact 43 of the second relay, and thereby an oil-feeding apparatus can be kept in the inoperative state until electric power is supplied again even through the relays 30 and 40 are broken.
More Like This:
| JP2009031254 | SEISMIC SENSOR |
| JP5036128 | How to determine machine impact events that correlate with machine conditions |
| JP2000193518 | SMALL VIBRATION DETECTION METHOD |
Inventors:
Kengo Yamazaki
Hiroyuki Okaba
Hiroyuki Okaba
Application Number:
JP3560296A
Publication Date:
July 13, 2005
Filing Date:
January 30, 1996
Export Citation:
Assignee:
Tatsuno Mechatronics Co., Ltd.
International Classes:
G01H1/00; B67D7/32; H02H5/00; (IPC1-7): B67D5/32; G01H1/00; H02H5/00
Domestic Patent References:
| JP60193897A | ||||
| JP56074495A |
Attorney, Agent or Firm:
Katsuhiko Kimura
Keiji Nishikawa
Keiji Nishikawa