Abstract

Disclosed is an adaptive light sensitive switch (114) comprising a sensor (102) for detecting an ambient light level value, a processor (205), and a memory (209) for storing a program (233) configured to direct the processor to switch a light (110) on and off daring a current night, the program comprising code for receiving a first parameter value specifying a first proportion and a second value specifying a second proportion, storing information based on the output of the sensor; determining a duration of at least one calibration night, estimating (414), based upon the duration of the calibration night a duration of the current night, switching (419) the light on at sunset for a first proportion of the current night, the light being switched on at a first predetermined illumination level, subsequently modifying the illumination level of the light to a second predetermined illumination level (824) for a second proportion of the current night, and subsequently further modifying the illumination level of the light to a third predetermined illumination level (829) for a remainder of the current night until at or near a sunrise time immediately following the current night.

IPC Classes  ?

• H05B 37/02 - Controlling
• F21V 23/04 - Arrangement of electric circuit elements in or on lighting devices the elements being switches
• G06F 9/00 - Arrangements for program control, e.g. control units
• H01H 35/00 - Switches operated by change of a physical condition

Abstract

Disclosed is a switch module (123) for connecting a load (120) to an ac supply (131), comprising an electromechanical switch (107) for (a) connecting, in response to a mechanical ON signal (108) the ac supply to a load, (b) disconnecting, in response to an electrical OFF signal (132) the ac supply from the load; wherein electrical power is not required to maintain the latched open state or the latched closed state, the switch module further comprising a solid state switch (117) in series with the electromechanical switch, a control module (112) for periodically driving the solid state switch from an on state to an off state during part of an ac cycle, and a storage device (115) to receive power from a voltage (118) developed across the solid state switch, for driving the solid state switch, and to provide the electrical OFF signal to the electromechanical switch.

IPC Classes  ?

• H03K 17/68 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being bipolar transistors specially adapted for switching AC currents or voltages
• H05B 39/04 - Controlling
• H05B 39/06 - Switching arrangements, e.g. from series operation to parallel operation

Abstract

A shuttle valve assembly (200) for an hydraulically actuated tool has a primary chamber (201) with a primary inlet port (202) located at an upstream end thereof for communicating with an hydraulic fluid supply (81). The primary inlet port (202) defines an inlet valve seat (203) with an inlet stop (204) located downstream. An inlet valve member (210) is displaceable along an inlet valve path between a closed position sealingly engaging the inlet valve seat (203) to at least substantially prevent flow of hydraulic fluid through the primary inlet port (202) and an open position engaging the inlet stop (204) and allowing flow. A primary outlet port (212) is located at a downstream end of the primary chamber (201) for communicating the primary chamber with an actuable member (52) of the tool. The primary outlet port (212) defines an outlet valve seat (213) with an outlet stop (224) located downstream. An outlet valve member (230) is displaceable along an outlet valve path between a closed position sealingly engaging the outlet valve seat (213) to at least substantially prevent flow of hydraulic fluid through the primary outlet port (212) and an open position engaging the outlet stop (224) and allowing flow. A charging port (214) is located between the primary inlet port (202) and the primary outlet port (212) for communicating the primary chamber (201) with an hydraulic pump (300). An hydraulic tool incorporating the shuttle valve assembly (200) is also disclosed.

IPC Classes  ?

• F16K 11/10 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with two or more closure members not moving as a unit
• F16K 17/02 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side
• F16K 15/02 - Check valves with guided rigid valve members
• H01R 43/042 - Hand tools for crimping
• B25B 27/00 - Hand tools or bench devices, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
• F16K 31/44 - Mechanical actuating means

Abstract

An hydraulically actuated tool has a body (120), an hydraulic fluid supply (81), a head chamber (54) and an actuable member (52) adapted to be actuated by pressure within the head chamber (54). An hydraulic drive arrangement (300) is configured to draw hydraulic fluid from the hydraulic fluid supply (81) and drive the hydraulic fluid under increasing pressure into the head chamber (54). An indicator assembly (700) is mounted in the body (1,20) and has an indicator member (701) displaceable between a retracted position and an extended position protruding from the body (120). A pressure relief valve assembly (500) is adapted to open upon pressure within the head chamber (54) reaching a predetermined threshold pressure. Opening of the pressure relief valve assembly (500) communicates the head chamber (54) with the indicator assembly (700) to drive the indicator member (701) to the extended position and communicates the head chamber (54) with the hydraulic fluid supply (81).

IPC Classes  ?

• F16K 17/04 - Safety valvesEqualising valves opening on surplus pressure on one sideSafety valvesEqualising valves closing on insufficient pressure on one side spring-loaded
• B25B 27/00 - Hand tools or bench devices, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
• F16K 37/00 - Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given