G - Physics – 07 – F
Patent
G - Physics
07
F
342/11.3
G07F 13/00 (2006.01) G07F 5/18 (2006.01)
Patent
CA 1217840
ABSTRACT OF THE DISCLOSURE A central control panel to be used in association with a source of electric power, defining at least two power terminals, and a plurality of electrical units, each such unit including a unit controller device operable to control the functioning of the unit upon delivery of a start signal to the unit controller device, the start signal being a signal from a pre-determined terminal of the power source, wherein the control panel comprises, a power input connectable to a first power terminal of the power source, a plurality of electrical switches, each such switch defining two normally closed switches and a normally open switch,each switch defining two terminals, the three switches being ganged together for simultaneous operation, one of the normally closed switches of each switch being connected in a first series to each other and to the power input, another of the normally closed switches of each switch being connected in a second series with each other, a first terminal of each normally open switch being connected to an electrical unit controller device, a second terminal of each normally open switch being connected with a terminal of the said other normally closed switch within the same switch, and a control relay, including an energizing circuit and a normally open relay switch, the energizing circuit being connected in series to the normally closed switch of the last switch in the first series, the energizing circuit being connectable to the second power terminal of the power source, whereby a voltage difference may be defined across the energizing circuit, the relay switch being connectable between the pre-determined terminal of the power source and the normally closed switch in the second series. The invention may be used to control the operation of, for instance, washing machines, drying machines or gasoline dispensers.
466936
Melek Bernard
Szereszewski Juliusz M.sc.
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