Control circuit with plural individual selectable controls
AssigneeGreater Union Theatre Supplies Pty. Limited
InventorPhillip J. Storey
Life of this patent
Estimating the term…
Abstract
An electrical circuit for the control of a parameter of sound, lighting, etc. within an auditorium by a selected one of a plurality of interconnected controlling devices, wherein each of the devices comprises a manual control (R4) for said parameter which is effective upon operation of a latched trigger (G3, G4), the trigger being activated whenever a signal is received from a selection circuit (STROBE) common to all of the devices while a manual switch (SW1) at a selected device is operated, and the trigger becoming unlatched when a subsequent signal is received and the manual switch is not operated.
Claims7
A system for electrical control of a function within a defined area, comprising:
- an electrical bus traversing at least part of said area;
- a control circuit connected with said electrical bus and operable to provide electrical control of said function;
- a plurality of controlling devices connectable to said electrical bus for individual operation of said control circuit;
- each one of said controlling devices having a semi-conductor device, a manual control means for deriving a voltage to operate said control circuit and being connectable to said control bus with activation of said semi-conductor device, an electronic latch, a switch manually operable for effecting, by means of a first signal provided from said control circuit, closure of said latch for activation of said semi-conductor device;
- and
- means for opening of said latch upon receipt of a second signal provided from said control circuit at the time when said manually operable switch is not operated.
Dependencies are inferred from the claim text.