Security system

Claim 2

Apparatus for operating a controlled device through the generation of a plurality of coded signals in a preselected sequence comprising means for sequentially generating a plurality of coded signals, control apparatus connected to be responsive to the coded signals and operative in response to the sequential generation of a preselected combination of the coded signals, said control apparatus including alarm means connected for providing an alarm in response to a preselected coded signal derived from said generating means, and means connected to said generating means for coupling the preselected coded signal to said alarm means for operating same and to the control apparatus to cause the operation of the control apparatus in response to the preselected combination of coded signals less one of the coded signals and including said preselected signal.

Claim 3

Apparatus for operating a controlled device as defined in claim 1 including triggerable time delay means connected to be responsive to signals from the generating means other than the signals comprising the preselected combination of signals for inhibiting the operation of the control apparatus for a preselected time period in response to at least one of said other signals or the generation of the preselected signals in other than the correct sequence.

Claim 4

Apparatus for operating a controlled device as defined in claim 2 including means for coupling the signals for operating the time delay means to said alarm means for operating same in response thereto.

Claim 5

Apparatus for operating a controlled device through the generation of a plurality of coded signals comprising means for sequentially generating a plurality of coded signals, a controllable device, control means coupled to said generating means for operating said device, said control means including circuit means for detecting the coded signals and operating the device only when a preselected combination of signals are generated in a preselected sequence and in a predetermined time interval, further circuit means for detecting the generation of a signal other than the signals of the preselected combination or the generation of the preselected signals in other than the preselected sequence to prevent the operation of said device, time delay means connected to be responsive to the generation of the first generated signal from the generating means and operative after a preselected interval to provide a signal to said further circuit means for preventing the operation of the controllable device in response to the first generated signal and the subsequently generated signals after a preselected time interval after the receipt of the first generated signal and further time delay means responsive to the generation of said preselected combination of signals in said preselected sequence for preventing the operation of the controllable device upon the generation of a wrong signal subsequent to the generation of said preselected combination of signals in said preselected sequence.

Claim 6

Apparatus for operating a controlled device through the generation of a plurality of coded signals comprising means for sequentially generating a plurality of coded signals, a controllable device, control means coupled to said generating means for operating said device, said control means including circuit means for detecting the coded signals and operating the device only when a preselected combination of signals are generated in a preselected sequence and in a predetermined time interval, further circuit means for detecting the generation of a signal other than the signals of the preselected combination or the generation of the preselected signals in other than the preselected sequence to prevent the operation of said device, time delay means connected to be responsive to the generation of the first generated signal from the generating means and operative after a preselected interval to provide a signal to said further circuit means for preventing the operation of the controllable device in response to the first generated signal and the subsequently generated signals after a preselected time interval after the receipt of the first generated signal and further time delay means responsive to the generation of said preselected combination of signals in said preselected sequence for preventing the operation of the controllable device upon the generation of a wrong signal subsequent to the generation of said preselected combination of signals in said preselected sequence.

Claim 7

Apparatus for operating a controllable device comprising means for sequentially generating a plurality of binary coded signals, a corresponding plurality of bistable elements connected to be responsive to the generation of one of the signals of a preselected combination of signals being switchable in response to the coupling of the individual signal thereto for providing an output indication thereof, error circuit switching means for detecting the sequence of operation of the bistable elements and switchably responsive thereto for providing an output indication upon the generation of the signals in other than a preselected sequence, time delay means connected to be responsive to the switching of the bistable element responsive to the first signal of the preselected combination and providing a switching signal to each of the elementS after a preselected time interval for resetting the states thereof to their initial states and to the error circuit means for resetting same, a controller, controller-actuating circuit means coupled to be responsive to the switching of the bistable elements in the correct preselected sequence and within the time interval of the time delay means for operating the controller, said actuating circuit means including a circuit connection to the error circuit means for preventing the actuation of the controller by the actuating circuit in response to a signal derived therefrom, said controller-actuating circuit means including further time delay means for preventing the operation of said controlled device after the generation of said preselected combination of signals in said preselected sequence upon the generation of a wrong signal during a preselected time interval after the correct combination of signals is generated, and wrong-signal-detecting means coupled to be responsive to the generated signals other than the signals of the preselected combination for providing an output indication in response thereto to said error-switching circuit means.

Claim 8

Apparatus for operating a controllable device comprising means for sequentially generating a plurality of binary coded signals, a corresponding plurality of bistable elements connected to be responsive to the generation of one of the signals of a preselected combination of signals being switchable in response to the coupling of the individual signal thereto for providing an output indication thereof, error circuit switching means for detecting the sequence of operation of the bistable elements and switchably responsive thereto for providing an output indication upon the generation of the signals in other than a preselected sequence, time delay means connected to be responsive to the switching of the bistable element responsive to the first signal of the preselected combination and providing a switching signal to each of the elementS after a preselected time interval for resetting the states thereof to their initial states and to the error circuit means for resetting same, a controller, controller-actuating circuit means coupled to be responsive to the switching of the bistable elements in the correct preselected sequence and within the time interval of the time delay means for operating the controller, said actuating circuit means including a circuit connection to the error circuit means for preventing the actuation of the controller by the actuating circuit in response to a signal derived therefrom, said controller-actuating circuit means including further time delay means for preventing the operation of said controlled device after the generation of said preselected combination of signals in said preselected sequence upon the generation of a wrong signal during a preselected time interval after the correct combination of signals is generated, and wrong-signal-detecting means coupled to be responsive to the generated signals other than the signals of the preselected combination for providing an output indication in response thereto to said error-switching circuit means.

Claim 9

Apparatus as defined in claim 5 wherein the signal-generating means comprises independently operable electrical switches for providing electrical signals in response to the operation thereof and includes a plug board connected to the switch and connected to the bistable elements in a predetermined fashion for defining the preselected operable combination of signals and the sequential order required for operating the controller.

Claim 10

Apparatus as defined in claim 6 including alarm means connected to be responsive to the output indication from the error circuit means.

Claim 11

Apparatus as defined in claim 7 including circuit means connected to be responsive to one of the generated signals other than the signals of the preselected combination for switching the state of one of the bistable elements in the correct sequence for operating the controller and connected for actuating said alarm means.

Claim 12

Apparatus as defined in claim 8 wherein the signal-generating means includes electrical key-operated means for generating the coded signals.

Claim 13

Apparatus as defined in claim 9 including mode-selection-switching means for selecting the mode of generating the coded signals either by means of the electrical switches alone, the key means alone or a combination of both the switches and the key means.