Refrigeration – With indicator or tester – Operatively correlated with automatic control
Patent
1991-04-26
1992-11-10
Wayner, William E.
Refrigeration
With indicator or tester
Operatively correlated with automatic control
236 94, 361166, G05D 2300, F25B 4900
Patent
active
051613875
ABSTRACT:
A method of determining and controlling a load by a controller. The method comprises the steps of transmitting a signal for a first predetermined time period on an electrical line having a load in parallel with a capacitor; monitoring the electrical line for electrical activity within a second predetermined time period following the first time period; and controlling the load in response to the presence or absence of the electrical activity.
REFERENCES:
patent: 4538419 (1985-09-01), Lord
patent: 4701695 (1987-10-01), Chan et al.
patent: 4901004 (1990-02-01), King
patent: 5065813 (1991-11-01), Berkeley
Foye David M.
Johnson Tedd P.
Metcalfe Alan G.
American Standard Inc.
Beres William J.
Ferguson Peter D.
O'Driscoll William
Wayner William E.
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