Abstract: Apparatus 11 and 13 for interfacing two AC sources with two AC loads 17a 17b in the form of solenoid operated valves over a single conductor 25, with a return conductor 19 in an irrigation system is disclosed. The apparatus has an encoder circuit 11 with two inputs 21a 21b for connection to the two AC sources, and an output 23 for connection to the single conductor 25, and a decoder circuit 13 having an input 27 for connection to the conductor 25, and two outputs 29a 29b for connection to loads 17a 17b respectively. When the first input 21 a is powered, the first load 17a will be switched on, and when the second input 21b is powered, the second load 17b will be switched on. The decoder portion 13 incorporates switching circuits 43a 43b, interfaced with turn on delay timers 45a 45b respectively, to delay operating the loads at switch on, and turn-off delay timers 47a 47b to hold the loads on after switch off.
Type:
Grant
Filed:
August 6, 2015
Date of Patent:
October 10, 2017
Assignee:
Bookleaf Pty Ltd.
Inventors:
Walter John Edwards, Michael Barrington Wood
Abstract: A controller (11) in a tap timer, having a battery (19) for connected via a charge circuit (23) to selectively charge a storage capacitor C2. The storage capacitor C2 is connected to an actuator circuit (25) to selectively provide power from the storage capacitor C2 to actuate a device M1. A processor (13) controls the actuator circuit (25) according to a pre-programmed schedule or on user demand. The processor monitors various parameters including charge rate of the capacitor C2 in order to determine battery condition, to determine if the processor (13) should next actuate the device (13).
Type:
Application
Filed:
April 2, 2015
Publication date:
April 20, 2017
Applicant:
Bookleaf Pty Ltd
Inventors:
Walter John Edwards, Michael Barrington Wood
Abstract: Apparatus 11 and 13 for interfacing two AC sources with two AC loads 17a 17b in the form of solenoid operated valves over a single conductor 25, with a return conductor 19 in an irrigation system is disclosed. The apparatus has an encoder circuit 11 with two inputs 21a 21b for connection to the two AC sources, and an output 23 for connection to the single conductor 25, and a decoder circuit 13 having an input 27 for connection to the conductor 25, and two outputs 29a 29b for connection to loads 17a 17b respectively. When the first input 21a is powered, the first load 17a will be switched on, and when the second input 21b is powered, the second load 17b will be switched on. The decoder portion 13 incorporates switching circuits 43a 43b, interfaced with turn on delay timers 45a 45b respectively, to delay operating the loads at switch on, and turn-off delay timers 47a 47b to hold the loads on after switch off.
Type:
Grant
Filed:
November 28, 2011
Date of Patent:
October 13, 2015
Assignee:
Bookleaf Pty Ltd
Inventors:
Walter John Edwards, Michael Barrington Wood
Abstract: A duplex encoder/decoder pair 11 and 13 for interfacing two AC sources with two AC loads 17a 17b over a single conductor 25, with a return conductor 19 is disclosed. The pair has an encoder portion 11 with two inputs 21a 21b for connection to the two AC sources, and an output 23 for connection to the single conductor 25, and a decoder portion 13 having an input 27 for connection to the conductor 25, and two outputs 29a 29b for connection to loads 17a 17b respectively. When the first input 21a is powered, the first load 17a will be switched on, and when the second input 21b is powered, the second load 17b will be switched on. The decoder portion 13 incorporates switching circuits 43a 43b, interfaced with turn on delay timers 45a 45b respectively, to delay operating the loads at switch on.
Type:
Application
Filed:
November 28, 2011
Publication date:
November 29, 2012
Applicant:
BOOKLEAF PTY. LTD.
Inventors:
Walter John EDWARDS, Michael Barrington WOOD