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US 4,071,773 AGranted
Patch cord timer
AssigneeP. R. Mallory & Co. Inc.
InventorCharles E. Scott
Life of this patent
Estimating the term…
Abstract
A timer wherein the timing means of said timer includes an improved patch cord control which consists of the electrical coupling of at least two patch cords and two terminal means to individual power switching means and the grouping of timing resistors into at least two groups each of which consist of timing resistors of equal value for preselecting a maximum number of time intervals utilizing a minimum number of resistors.
Claims11
A timer comprising:
- a. power switching means for switching power on and off to the timer,
- b. power supply means for regulating power to the timer responsive to said power switching means,
- c. timing means for preselecting a maximum number of various time intervals responsive to said power supply means including a bank of individual switching means, at least two banks of individual impedance means, a plurality of patch cords and terminal means coupling at least one of said individual switching means to at least one impedance means from each of said banks of individual impedance means whereby at least one of said individual switching means has a preselected timing interval, and capacitance means connected in series to said banks of individual impedance means, and
- d. power turn-off means responsive to said timing means to de-energize said power switching means.
1 more element
Dependencies are inferred from the claim text.