Boots – shoes – and leggings
Patent
1988-07-14
1990-06-12
Teska, Kevin J.
Boots, shoes, and leggings
364500, 204406, G06G 757
Patent
active
049338706
ABSTRACT:
Apparatus for controlling the concentration of silver ions during the precipitating of a silver halide emulsion in a precipitation vessel. The introduction of a silver salt and a halide salt is controlled in accordance with a preselected program, which in turn is responsive to the silver ion concentration measured in the vessel by a silver ion sensor. Linerization of the output signal from the sensor is accomplished by converting the sensor's output voltage into a concentration voltage through the use of a Nernst equation and by transforming the concentration voltage into a variable value denoted Y representing a constant coefficient differential equation that is linear. The linear equation is then used to control the addition of the silver salt and the halide salt to the precipitation vessel.
REFERENCES:
patent: 3624638 (1971-12-01), Riseman
patent: 3730685 (1973-05-01), Prohaska
patent: 3999048 (1976-12-01), Parthemore
patent: 4045721 (1977-08-01), Swain
patent: 4055478 (1977-10-01), Wilson
patent: 4065313 (1977-12-01), Shippey
patent: 4071427 (1978-01-01), Cheng et al.
patent: 4157283 (1979-06-01), Zetter
patent: 4499552 (1985-02-01), Kanazawa
patent: 4838999 (1989-06-01), Haar et al.
Dugas Edward
Eastman Kodak Company
Ramirez Ellis B.
Teska Kevin J.
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