A drive shaft is interposed between the speedometer and odometer and the speedometer cable of an automotive vehicle and coupled to and rotatable therewith in a manner whereby the drive shaft rotates at the same speed as the cable. A cam shaft is rotatably mounted in operative proximity with the drive shaft and is coupled thereto by gears. A cam wheel is affixed to and rotatable with the cam shaft. The cam wheel has a cylindrical rim and a cam mounted on the rim and extending therefrom. The cam s...

A pair of horizontally radiating vertically spaced antennas, A and B, radiate frequencies f and f+.delta.f, respectively, from a first vehicle. On a second vehicle there is provided a receiver which is coupled to a pair of similarly mounted antennas, A.sup.1 and B.sup.1. Each antenna, A.sup.1 and B.sup.1, receives f and f+.delta.f. Said receiver determines the phase difference between the best frequencies corresponding to f and f+.delta.f at each antenna, A.sup.1 and B.sup.1, and determines ther...

Apparatus for measuring and indicating the settlement of the floor of a large liquid containing vessel such as an oil storage tank. The apparatus comprises sonic echo sounding means positioned at or movable between each of a multiplicity of spaced points disposed within the vessel and above its floor in known relationship one with another, and ranging means for furnishing for each point, and upon the basis of the echo sounding means output, a measure of the distance from the point to the vessel ...

An electronic distance meter is interfacable to a controller and measures distance to a moving target by comparing the phase of a signal propagated to the target with the phase of the reflected signal. A time mark indicating when the measurement was made is corrected by an offset to compensate for an apparent distance error related to the doppler effect. The corrected time mark indicates when the target was actually at the apparent distance. An asynchronously resettable timer provides measuremen...

A distance detector has an optical system, a distance sensor, and a distance calculating circuit. The optical system forms an image of a subject. The distance sensor has at least three line sensors that are disposed substantially on the imaging plane of the optical system and are arranged at partially uneven intervals. The distance calculating circuit calculates the distance to the subject in accordance with the output from the distance sensor.

The invention is concerned with establishing the datum level of a lance or cartridge relative to the surface of a bath of molten metal in a metallurgical vessel. A voltage is applied to the movable lance or cartridge in such manner that contact of the lance or cartridge with the bath surface causes an earth leakage current to be established. Electrical circuitry is incorporated to open a circuit breaker upon flow of a predetermined earth leakage current and actuate an indication on a distance me...

A distance extender (100, 200) for increasing a distance between a first device (145) and a second device (150) in electrical communication with the first device includes an electrical cable (130, 230) electrically coupled between the first device and the second device, a first subsystem (110, 210) electrically coupled to the first end of the electrical cable, and a second subsystem (120, 220) electrically coupled to the second end of the electrical cable. The electrical cable includes a first e...

A distance safety stick for a bicycle and the like is provided and consists of a guard arm and mounting device for supporting the guard arm in a horizontally disposed position at one side of the bicycle from which position the guard arm may be swung upwardly into a vertically retracted position. The guard arm has an arrow shaped reflector portion to indicate the bicycle presence to vehicles approaching from the front and rear. In a modified form the guard arm is adjustable.

Distance piece for mounting an object at a distance from a wall, the piece being formed by a block-shaped body with a flat rear side, and a front side extending substantially parallel to the rear side. The front side is provided with a protruding part and with at least one pair of bore holes extending perpendicularly to the rear side and through the body.

An instrument for measuring the distance of a body in relative motion away from a datum point measures the optical attenuation of an optical fibre that has an end secured to that datum and extends to the body where the remainder of the fibre is coiled. As the body moves away, so progressively more fibre is uncoiled, and the contribution of bending losses to the total loss is reduced and hence the resulting reduction in attenuation provides a measure of distance travelled.