An automatic speed control system is disclosed in which an error signal Ve, representing the speed error of the vehicle, is added to a ramp voltage, ramping between fixed values, to produce a control signal Vc. Two comparators compare Vc with upper and lower limits, respectively, so as to produce a pulse train on one of two lines depending on the sign of the error and having a mark-space ratio depending on the magnitude of the error. A circuit responds to the first pulse to occur in the pulse tr...

The dielectric spacer between the conductive electrodes of an electrical capacitor is a biaxially oriented film made from a mixture of less than 80 percent by weight of isotactic polypropylene and more than 20 percent by weight of isotactic polybutene-1.

A device for the production of a tachometry signal of infinite resolution and without ripple from an inductive position sensor. The sensor is fed by a sinusoidal reference signal and supplies two phase signals. A resistance-capacitance circuit tuned to the frequency of the reference signal is fed by the two phase signals of the sensor and supplies a sinusoidal signal whose phase angle is proportional to the rotation of the sensor. This signal is then digitized and processed by digital phase comp...

A telephone protector module is provided with indicating means actuated by the actuation of heat sensitive means within the module to provide a visual indication of such actuation externally of the module casing. The indicating means is in the form of an elongated member secured at one end thereof to a moving member of the heat sensitive means. The free end of the indicating member projects through an opening in the end of the casing element, and normally lies flush with the outer surface thereo...

A speed control means for a motor of the commutator type and is particularly intended for such motors as applied to sewing machines. The speed control means is arranged to rotate the brush axis while simultaneously cutting in or cutting out a diode from the motor circuit.

A method and apparatus is disclosed for continuously varying the pressure of brushes against a commutator of a direct current or universal electric motor in response to variations in motor load.

A locking mechanism for the trunk lid of a motor vehicle has a component which assumes a first position when the trunk lid is closed and locked. The component may or may not project outward from the trunk lid in its first position. The component is capable of assuming a second position when the trunk lid is released. In the second position, the component projects outward from the trunk lid to such an extent that a portion of the component which is recessed in the trunk lid in the first position ...

Reflective coating means are provided to replace the conventional reflector cavities surrounding each photoflash lamp of a multilamp photoflash array. A reflective adhesive coating for this purpose can be applied to each photoflash lamp around a portion of the lamp circumference to reflect the light outwardly in a desired direction. A reflective adhesive coating can also be applied to the circuit board member used with a photoflash lamp array to provide sequential firing of flash lamps as an alt...

A method and apparatus for measuring a motor speed in which a measurement pulse train is formed from a measurement signal generated in a frequency generator coupled to the rotation of a motor, and a reference pulse train is formed with a frequency greater than that of the measurement pulse train, and the number of both pulses are counted for a predetermined sampling time, and both count values are compared, thereby measuring the motor speed. Accordingly, the rotation speed can be measured by a s...

An idling system is disclosed for devices such as internal combustion engines having a speed controlling or governor. When no load is sensed by a load sensing means, a disable means generates a disable signal to deactivate the engine's speed controller after a predetermined time delay period. When a load is sensed, the disable means is itself disabled, allowing the device's speed control means to operate the device at the higher governed speed.