A heat detecting conductor embodied in a flat tape wherein conductive strips in an open circuit are separated, at acceptable temperatures, by thermoplastic insulating material which is adapted to melt at predetermined elevated temperatures and to permit the conductive strips to come into contact with each other, thereby closing the electric circuit and actuating an audible and/or visual alarm. The heat detecting conductor may be associated with a cable carrying one or more service lines or with ...

A vehicle collision detecting apparatus employs a detecting element constituted in a fragile material such as glass, with a coating of a conductive film for providing the detecting element with conductivity, or the fragile material contains a conductive material such as metal for providing the detecting element with conductivity. A circuit for continuously monitoring the conduction state of the detecting element is also provided wherein the detecting element is fixed in the periphery of the vehi...

A focus detecting system includes a lens device for forming an image of an object on a predetermined plane through an optical path. A light responsive device is positioned at the predetermined plane to respond to the light from the lens device for producing electrical signals representative of the instaneous intensity of the image formed thereon. A movable and a stationary apertured masks are arranged in the optical path between the lends device and the light responsive device to cyclically vary...

An apparatus for detecting faulty needles on an operating loom, particularly an operating hosiery loom. The apparatus comprises at least one magnetic detector, for example a Hall effect probe, mounted so that the needles of the loom pass successively in front of it during operation of the loom, and an associated electronic circuit for receiving signals from the or each detector, identifying those signals indicative of a defective needle, and providing a control signal for stopping the loom when ...

A system for detecting the position of a pattern, wherein a specific partial pattern in a pattern of an object is previously stored as a standard pattern, two-dimensional partial patterns are sequentially set out from the pattern of the object picked up by an image pickup device, the partial patterns set out are successively compared with the standard pattern to thus detect degrees of coincidence, and coordinates of a position to be found on the pattern of the object are calculated from the coor...

A distance detecting device utilizable in an optical device such as a camera and the like requiring focusing operation of the optical system thereof. The detecting device enables the adjustment of the relative optical length between the group of light receiving elements arranged adjacent to the image forming plane of the object to be measured by the distance measuring optical system and the distance measuring optical system. The detecting device is characterized in that the output of each of the...

A focus detecting system includes a lens device for forming an image of an object on a predetermined plane through an optical path. A semi-circular opaque masking device is arranged to rotate in the optical path to cyclically mask a portion of the optical path. A light responsive device is positioned at the predetermined plane to respond to the light from the lens device for producing electrical signals representative of the instaneous intensity distribution of the image formed at the predetermi...

An intrusion detecting system including a transmitting unit for radiating microwave energy along a preselected path which is amplitude modulated at a preselected frequency, and a receiving unit positioned on the path and separated from the transmitting unit for receiving a portion of the radiated microwave energy which includes a signal processing circuit which distinguishes between radiated signals which are amplitude modulated at said preselected frequency and other radiated signals and which ...

Bilirubin, particularly as contained in body fluids, is determined with test strips comprising an absorbent ##SPC1## Wherein X.sup.- is a stabilizing anion; R.sub.1 and R.sub.2, which may be the same or different, are halogen or lower alkyl or alkoxy and R.sub.3 and R.sub.4, which may be the same or different, are hydrogen, halogen, nitro, or lower alkyl or alkoxy; The aromatic ring in formula (I) containing either (a) 1 to 3 halogen atoms or (b) one nitro group, but not both together; and an am...

A leak detecting apparatus for detecting flow of gas through a gas pipe system in house trailers and the like includes a tilting clear bowl partially filled with liquid and containing a submersible flow tube which is free of the liquid during normal flow and which is immersed during leak detecting conditions whereupon a leak creates visible bubbles. The leak detecting apparatus may include a cooperative arrangement associated with a door to produce a testing sequence before the door is opened. T...