Long time period astable multivibrator circuit with independentl

Details Long time period astable multivibrator circuit with independentl Long time period astable multivibrator circuit with independentl

1975-03-07

1977-03-15

Miller, Jr., Stanley D.

Lubrication

Lubricators

Force feed

307246, 307294, 328129, 222 70, 361197, B61D 1500, H03K 513

Patent

active

040119270

ABSTRACT:
A solid state electronic dual timer which, in one preferred embodiment, is utilized for dispensing a measured quantity of lubricant at predetermined time intervals. A continuously operating pump is selectively connected to the devices requiring lubricant by a control valve means. A capacitor is charged through a first circuit path from one predetermined level until it reaches a second predetermined level during which time the control valve means for dispensing the lubricant is energized. As soon as a second predetermined level is achieved, the pump means is deenergized, at which time the capacitor is caused to discharge towards said first predetermined level at a slow rate. The charging rate is typically adjustable over a range between 2-90 seconds in charging from said first to said second predetermined level and is further adjustable over a range which is typically of the order of a few minutes to several hours when discharging from said second to said first predetermined level so as to dispense lubricant during a period of from 2-90 seconds every two hours, for example, said interval being repeated on a cyclic basis.

REFERENCES:
patent: 3388346 (1968-06-01), Roof et al.
patent: 3461322 (1969-08-01), Hirsch et al.
patent: 3486044 (1969-12-01), Hirsch
patent: 3589563 (1971-06-01), Carragan et al.
patent: 3694672 (1972-09-01), Buyak
patent: 3726437 (1973-04-01), Siegel
patent: 3739944 (1973-06-01), Rogerson
patent: 3837532 (1974-09-01), Sahatjian

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