Two or more sheets of liquid crystal thermal film assembled side by side, one surface of which assembly is covered by a flat piece of temperature equalizing material made of high thermal conductivity material, such as tin-foil, which film sheets change color in response to changes in the skin temperature of a person on whom my device is attached. At opposite sides of the sheets are two retaining strips of material to wrap around a finger, that can be fastened together or unfastened as desired.

A Schmitt trigger circuit is caused to oscillate by a time-constant circuit including a reference inductor. The changing inductance of a variable inductor, for example, an inductive transducer for measuring mechanical movements, is switched into the same circuit, and the length of pulses resulting is measured in comparison with the stored value of the pulse length produced by the comparison inductor, which needs to be put in circuit only at longer intervals. With two Schmitt trigger circuits, on...

An arrangement for compensating against changes in parameters of an optical emitter and an optical receiver in an optical scanner that detects different luminosities. The optical receiver is exposed to light from the optical emitter and provides an output voltage that is compared with a reference voltage. The output voltage is clamped to the reference voltage when the light received by the optical receiver has energy of an extreme value. The receiver detects light of varying brightness between m...

Foam formation is reduced in a glass furnace during changeover from a first to a second glass melt of different oxidation state and colour comprising adjusting, in a series of steps, the oxidation state of the first melt towards that of the second melt prior to introducing or removing colourants.

The present invention provides a device for recording successive changes in indicia including a support structure, a front wall portion supported by the support structure, a display opening in the front wall portion, a fulcrum horizontally disposed above the opening on the rear side of the wall portion, an annular member on the rear side of the wall portion and through which the fulcrum extends eccentrically such that the annulus, when resting under its own weight on the fulcrum, presents a port...

A monitor for biological volume changes such as fluid content changes includes a source of constant current oscillations for application to the biological volume, and a receiver adapted to be coupled to the biological volume for producing a direct voltage having an amplitude corresponding to the impedance of the biological volume. A display device provides a display responsive to the D.C. voltage. A filter is provided for filtering the voltage, the filter having a time constant up to 15 seconds.

A configuration space is used for path planning and for controlling the motion of an object. The configuration space includes states which contain cost to goal and direction arrow values. These values indicate a path or absence of a path from the states to at least one goal state. The configuration space is differentially updated after a cost to goal or direction arrow value is changed.

A circuit for detecting leading or lagging phase relationship between first and second two-level input signals at each level transition of both of said input signals and comprising first and second voltage comparators each having first and second input terminals and a single output terminal and each responsive to signals of equal and non-equal logic levels supplied to the first and second input terminals thereof to produce an output signal having high and low logic levels, respectively. First an...

A device for measuring pressure changes, and preferably for testing the tightness of a fuel tank, wherein a high-pass filter, the time constant of which is greater than the time constant of the pressure changes to be measured and less than the time constant of the pressure changes of the surrounding air, is arranged behind an absolute-pressure sensor pressure in the fuel tank.

A motion sensor has a carrier which rotatably supports a shaft. One or more eccentric weights are mounted on the shaft for rotation therewith. The carrier is supported by pins which are normal to the shaft and rotatable on bearings. One of the pins carries a disk with marks in the form of lines, and a sensing device for the marks is disposed adjacent the disk. This pin further carries a transmission component which cooperates with a transmission component on the shaft. When an object on which th...