Boots – shoes – and leggings
Patent
1995-06-12
1998-06-23
Trammell, James P.
Boots, shoes, and leggings
364509, 364550, 3642283, 364229, 364230, 1374875, 137392, 137391, 137395, 73290R, 73302, 73316, 361215, 361217, 361170, 361178, 340612, 340618, 340603, 340649, 34082534, 34082554, G06F 1116, B67D 532, H03K 1914, H04B 1000
Patent
active
057711780
ABSTRACT:
A fail-safe fluid transfer control apparatus has full redundancy in the response to various inputs such as overfill probe signals, ground detection signals, and the like. Independent microprocessor controllers independently evaluate the inputs and each output control signals to close a respective relay when the inputs indicate that fluid transfer may commence. The relays are arranged in series such that both must be closed for a fluid transfer to commence. The control signals from each controller include a static signal and an alternating signal, both of which must be properly output to close its respective relay. Each controller monitors the state of each relay, and discontinues its control signals if either relay appears to be malfunctioning. Each controller runs an different, independently written firmware program to process the detected inputs to prevent a common firmware error. An optical bypass key replaces conventional mechanical keys and transmits an optically encoded signal to the controller for establishing a bypass condition. A preheating circuit is also provided for providing a dynamic voltage supply to standard thermistor probes which may be encountered.
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"System for the unmistakable temporary connection of tank compartments of a tanker truck with a stationary receiving tank", Arndt et al, PTO 97-2008 (DE 4431378 C1, Sep 14 1995), Mar. 1997.
"System for the unconfusible association of a safety system with a tank caompartment of a tank car", Herrmann Popken, PTO 97-2063 (DE 4322230 C1, 19 Jan. 1995), Mar. 1997.
Beaulieu Richard O.
Cadman Gary R.
Shea Arthur W.
Stemporzewski, Jr. Francis V.
Tougas Stephen F.
Dam Tuan Q.
Scully Signal Company
Trammell James P.
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