Alliedsignal Inc.

Other

Samuel C Hsieh

Muthu K Murugan

Charles M Hansen, Jr

Leon M Kasdan

Yefim Novoselsky

Ratan Moy Guha

Paul A Verdi

George C Pusey, Iii

Tsuwei Chu

Clifford J Wiener

A directional locking caster convertible between a locked position and an unlocked position by application of a lateral force. Also disclosed are transport devices including the caster. Additionally, a transport device including a directional locking caster that is convertible from a locked position to an unlocked position via a cable release.

Directional lock with release for a pivoting caster

A bearing detection system for an electrical generator (10) includes auxiliary bearings (29) for supporting a rotating shaft (39) upon failure of main bearings (62). The auxiliary bearings (29) are mounted on the shaft and have a slight gap (64) between their outside diameters and bearing liners 33. The gap corresponds to the main bearing permissible wear. During normal functioning of the main bearing, the auxiliary bearing frame (34) rotates with the shaft and a magnet (35) with a small clearance between its face and auxiliary bearing outer ring (32) forces the synchronized rotation of inner (37) and outer (32) races. The auxiliary bearing outer ring or race (32) has a coaxial groove (31) on its outer diameter and a detection sensor (30), mounted on the bearing liner, gives a signal per rotation of the shaft to a control circuit (40). The control circuit (40) determines the rotational status of the auxiliary bearings outer ring (32) by counting the number of impulses generated by the circuit (40) when the groove crosses the sensor's magnetic fields. The circuit (40) detects the moment when any auxiliary bearing comes in contact with the bearing liner and results in no impulses being generated. The outer ring (32) stops rotating as the main bearing wear depth reaches the predetermined limit. In this case, the circuit (40) triggers the failure signal (71) to indicate that the main bearings need replacement.

Bearing wear detection system

A circuit for monitoring the DC content of an AC waveform includes a differential amplifier having one input connected to the AC waveform and the other input connected to a capacitive-coupled network that eliminates any DC component in the AC waveform at the frequency being monitored. Additional circuitry is required to cancel any phase shift and reactance of the coupling capacitor. The output of the differential amplifier is a signal which represents the amplitude and polarity of the DC content.

Apparatus for detecting DC content of an AC waveform

The phase voltages of a three phase alternating current input voltage are converted into currents. The negative half-cycles of the currents are added and the polarity of the added current is reversed. The current at the reversed (positive) polarity is converted into a positive output voltage which is a measurement of the input voltage.

Negative half-wave summing rectifier apparatus for a three phase AC

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Marlboro, NJ, United States of America

Samuel C Hsieh