A device indicates the level of concrete within the hopper of a concrete pump and prevent accidental overflow and spills. The concrete level indicator device includes an elongate post with an enlarge float fixed to the bottom end and a guide sleeve for allowing vertical telescoping movement of the post as the concrete level in this hopper changes. A retaining collar attaches to a screen in the hopper of the pump and surrounds the guide sleeve for limiting swinging movement of the post and guide ...

A permeameter having a hollow tube with a second tube slidably disposed within an internal chamber of the hollow tube, used in combination with one or more tables each of which correlates a specific rate of reading fall rate of water within the hollow tube with a unique soil hydraulic capacity of the soil being tested. The second tube has an air hole and a slot which are used in causing water contained in the hollow tube to seep into an auger hole. A reducing connector is secured to the bottom o...

The gas sensor may be an apparatus for sensing a proportion of a gas in a gas mixture. A gas sensor may have a sampling element slidably engaged with a sensor element. The sensor element may have a sensing chamber therein with an inlet passage and an outlet passage formed in the sensor element wherein the inlet passage and the outlet passage may be in communication with the sensing chamber and externally to the sensor element. A first detector may be positioned in the sensing chamber with a firs...

A liquid level detecting device to be disposed in a liquid tank includes a body, a float arm having a float to be disposed in liquid, a resinous arm holder fixed to the body to hold the float arm so that the float arm moves as a level of the liquid changes, a circuit board fixed to the body, an elastic metal plate member having a sliding contact which slides on a sliding surface of the circuit board under a biasing force and a fixing member for fixing the elastic metal plate member to the arm ho...

A device for evaluating the surface condition of a material and a method derived from it, based on the use of an element which vibrates under the influence of relative movement with respect to the surface to be assessed. This method allows the analysis of any surface, with or without surface periodicity, regardless of its constitution or its composition, and regardless of any surface treatment(s) it may have undergone. The evaluation device (1) comprises a support (2) to which is attached at lea...

A fixture for holding a gas turbine engine blade having an airfoil extending outward from a shank and a dovetail extending inward from the shank for attaching the blade to a disk of the engine. The dovetail includes at least one pair of protrusions extending fore and aft along opposite sides of the blade. Each of the protrusions including a pressure face generally facing the airfoil of the blade for engaging the disk to retain the blade in the disk during operation of the engine. The fixture inc...

A significant number of rescue workers are killed or injured each year as they conduct searches within damaged or burning structures, unaware that the structure is in imminent danger of collapse. The present invention provides a system and method for detecting and monitoring structural damages which are irreversible and which lead to inevitable collapse of a building or structure. The system includes at least one accelerometer that is housed in a device that is mounted on an exterior surface out...

A traction motor speed sensor support arrangement (30). A proximity sensor (34) is mounted within a housing (32) having a sensor support portion (44) cantilevered from a base portion (40). Dowel pins (60) extending from the base portion (40) position the sensor (34) at a predetermined locative relative to a rotating wheel (56) within the motor (10). A wire (50) leading from sensor (34) is formed in a rolling U (68) to accommodate movement of the motor (10) relative to the locomotive (52). The wi...

A flow generator having use in the provision of CPAP or assisted ventilation treatment is disclosed The flow generator has a turbine for the supply of breathable gas which is driven by an electric motor and an associated motor power supply. The power supply in turn is controlled by a controller. A pressure sensing port measures delivery pressure that is passed to a pressure transducer, the output signal of which is passed to the motor controller. The zero offset of the pressure transducer is aut...

A blade tip clearance probe including a rub probe support removably attachable to a probe boss attachable to a fan case; a rub probe removably attachable to the rub probe support, the rub probe is composed of soft composite material, the rub probe support is able to receive the rub probe such that the rub probe can be adjusted to contact a blade tip; and an anti rotational lock being able to lock the rub probe into place in the rub probe support and being able to prevent rub prove movement. A me...