Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1989-09-20
1991-03-19
Miller, Stanley D.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
324160, 324166, 32420712, 32420725, 328151, H03K 5159, G01P 342, G01P 348, G01B 714
Patent
active
050013637
ABSTRACT:
Disclosed herein is a circuit for measuring off-sets of a rotary shaft. In the circuit, a difference in time is produced, by a given sampling time, between an off-set output signal to be inputted to a low-level output selector and another off-set output signal to be inputted thereto. Owing to the above time difference, even though each off-set output signal undergoes a stepwise variation due to each DC off-set, the variation occur in each off-set output signal at the time difference. It is therefore possible to select either one of the off-set output signals, namely, the low-level off-set output signal, whereby the off-set output signal can be produced as an output free of a voltage level indicative of a rise in the off-sets due to an external disturbance corresponding to the variation.
REFERENCES:
patent: 4282515 (1981-08-01), Patterson, III
patent: 4625322 (1986-11-01), Tokazaki et al.
patent: 4634895 (1987-01-01), Luong
Miller Stanley D.
Mitsubishi Denki & Kabushiki Kaisha
Nguyen N. T.
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