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Patent No. 5571247

Self Containing Enclosure for Protection from Killer Bees

A self contained protective enclosure with an opening for entry and egress and a screen for ventilation and viewing.

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Class 33/786 - Liquid column indicator


Subclass of Class 33 - Geometrical instruments
Definition: Subject matter wherein a column of liquid is subjected to
No. of patents: 5
Last issue date: 06/19/1990


NumberTitleIssue Date
4934198Displacement and torque sensor using resistance element that is progressively shorted
Measurement sensor for length or distance changes, particularly for non-contacting measurement of torques of rotating shafts. In known measurement sensors, the length or distance change (Ɗx) is amplified by a mechanical lever system and is then converted...
06/19/1990
4793071Arrangement for measuring the relative distance of closely adjacent objects
The invention relates to an arrangement for measuring the relative distance of closely adjacent objects, in particular for measuring and adjusting the distance between a printing head and a roller in needle printers, in which the chamber of a distance mea...
12/27/1988
4706387Device for measuring hole elongation in a bolted joint
A device to determine the operable failure mode of mechanically fastened lightweight composite joints by measuring the hole elongation of a bolted joint is disclosed. The double-lap joint test apparatus 10 comprises a stud 20, a test specimen 30 having a ...
11/17/1987
4691445Horizontal evaluation datum scope
An instrument for establishing a horizontal plane for leveling ceilings, tables, floors and the like, consisting of a reference head having a translucent liquid reservoir, an adjustable field head, and a hose for interconnecting the two heads. With the le...
09/08/1987
4307514Bore diameter measurement gage
An apparatus for measuring the bore diameter of a hollow member whose bore diameter can change in the axial direction. The bore diameter measuring apparatus includes a probe portion, means for inserting the probe portion in the bore, and means for convert...
12/29/1981
 
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