Other

Accusonic Technologies Inc.

William E Calder

William L Robertson

Francis Lowell

Alan J Winkelman

Allen Griswold

A pulse generator (48) in a flowmeter system (10) transmits an excitation pulse to a transducer assembly (12) by way of a signal-conduction medium (20) located in a region subject to an explosion hazard. The amplitude of the excitation pulse is great enough that it would ordinarily trigger an explosion in the hazardous region if one of its cables (22, 23) were to break. But a saturable-core transformer (T1) so limits the excitation pulse's duration as to prevent the explosion.

Flowmeter for explosion-hazard environments

A spectral color generator is used in an optical sight for use as a gun sight, surveying instrument, or the like, with means for projecting light from the generator in the form of an illuminated reticle into the line of sight. The illumination from the generator is variable in color and intensity for maximum visibility against a variety of backgrounds, and means are provided for precise alignment, adjustment for elevation and windage and for levelling. In its basic form, the sight has long eye relief but is readily adaptable for use with telescopic attachments. The spectral color generator is also illustrated in an operational monitoring system responsive to sensing devices for monitoring a plurality of parameters including opacity and pressure.

Spectral color generator

An optical sight for use as a gun sight, surveying instrument, or the like, with means for projecting an illuminated reticle into the line of sight. The illumination is variable in color and intensity for maximum visibility against a variety of backgrounds, and means are provided for precise alignment, adjustment for elevation and windage and for levelling. In its basic form the sight has long eye relief, but is readily adaptable for use with telescopic attachments.

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Imperial Beach, CA, United States of America

William E Calder