摘要:
A presence detector unit (PDU) of the type relying on microwave radiation provides a signal indicating movement within a defined space when such movement occurs. A source of microwave radiation within a housing projects a beam of microwave radiation directed through a side of the housing to suffuse at least a portion of the defined space. A detector within the housing senses changes in microwave radiation reflected back toward the detector. An adjustable beam occlusion structure is supported by the housing and blocks a portion of the microwave radiation emanating from the source and through the side of the housing.
摘要:
An emergency power system for operation during loss of power on power mains comprises a spring-driven energy storage unit (ESU) and a generator. The ESU enters a generator mode responsive to a power outage state of a power sensor, during which mode unwinding of the spring drive powers the generator. After power is restored to the mains, a preferred embodiment automatically rewinds the spring using the generator as a motor.
摘要:
An emergency power system for operation during loss of power on power mains comprises a spring-driven energy storage unit (ESU) and a generator. The ESU enters a generator mode responsive to a power outage state of a power sensor, during which mode unwinding of the spring drive powers the generator. After power is restored to the mains, a preferred embodiment automatically rewinds the spring using the generator as a motor.
摘要:
A presence detector unit (PDU) of the type relying on microwave radiation provides a signal indicating movement within a defined space when such movement occurs. A source of microwave radiation within a housing projects a beam of microwave radiation directed through a side of the housing to suffuse at least a portion of the defined space. A detector within the housing senses changes in microwave radiation reflected back toward the detector. An adjustable beam occlusion structure is supported by the housing and blocks a portion of the microwave radiation emanating from the source and through the side of the housing.
摘要:
A bag for enclosing a handheld electronic device (HED) comprises a flexible sheet material such as a flexible or stretchy fabric. The material is formed into a bag having a main body and a mouth. The mouth has a periphery smaller than the periphery of the main body. The mouth can elastically stretch to allow passage of the HED. First and second loops are attached to and project from the bag adjacent to the mouth to allow a user to support the bag with thumb and forefinger while inserting the HED. In one embodiment, an elastic structure comprises the periphery of the mouth. The unstretched length of such an elastic structure may be adjusted to compensate for the size of the HED.
摘要:
A liquid-dispensing nozzle has a system for blowing air for a period of time through the nozzle's spout after the liquid valve closes. The flow of air purges and expels most of the liquid adhering to the interior surface of the spout, preventing this residual liquid from contaminating either the ground on which it may fall when the spout is withdrawn from a filler pipe or the air through evaporation. The invention applies particularly well to dispensing of liquid fuels such as gasoline.
摘要:
A structure for forming a barrier for an adjacent level of water comprises a plurality of “A” panels and a plurality of “X” panels. The A panels have at least two slots each extending from one of first and second long edges of the A panel to a slot terminus between the two edges. The X panels each have at least two slots each extending from an intersection with one of first and second edges of the X panel to a slot terminus between the two edges. Placing the X panels in a crossed and interlocked relationship with the A panels forms four sides of at least one cell. A container filled with water is within each of the cells. The container is formed of flexible material impervious to water and defining a closed volume having an unstressed shape approximating that of the cell's four sides.
摘要:
A bag for enclosing a handheld electronic device (HED) comprises a flexible sheet material such as a flexible or stretchy fabric. The material is formed into a bag having a main body and a mouth. The mouth has a periphery smaller than the periphery of the main body. The mouth can elastically stretch to allow passage of the HED. First and second loops are attached to and project from the bag adjacent to the mouth to allow a user to support the bag with thumb and forefinger while inserting the HED. In one embodiment, an elastic structure comprises the periphery of the mouth. The unstretched length of such an elastic structure may be adjusted to compensate for the size of the HED.
摘要:
A press for forming a workpiece with a tooling set includes an actuator assembly carrying a movable half or punch of the tooling set and having a two phase operation. In the first phase the actuator provides relatively low force in moving the punch to an intermediate position in close proximity to the workpiece. A sensor detects the position of the punch, and when the punch reaches the intermediate position provides a continue signal. The second phase of actuator operation is conditioned on occurrence of the continue signal, and uses normal high force to press the movable tooling half against the workpiece to complete the operation. The low force first phase allows obstructions of any kind to stop movement of the punch during the first phase before high force applied to the actuator may cause damage or injury to the obstruction. In a preferred embodiment the actuator assembly has hydraulic operation.