Manufacturers Index - Hilger & Watts
Hilger & Watts
London, U.K.
Manufacturer Class:
Metal Working Machinery
This page contains information on patents issued to this manufacturer.
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USPTO's for finding information on machinery patents.
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2,480,237
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Aug. 30, 1949
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Optical Device for Accurate Reading of Annular Scales
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Charles John Godfrey |
, England |
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Optical Device for Accurate Reading of Annular Scales
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Victor William Henry Towns |
, England |
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2,483,897
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Oct. 04, 1949
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Optical Precision Gauge
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Charles John Godfrey |
, England |
Application in Great Britain, 01 Mar. 1945. |
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2,505,166
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Apr. 25, 1950
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Spirit Level
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Albert Wood |
, England |
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2,604,229
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Jul. 22, 1952
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Closure Seal for Vacuum Vessels
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Ernst Schwarz |
, England |
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2,636,855
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Apr. 28, 1953
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Method of Producing Photoconductive Coatings
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Ernst Schwarz |
, England |
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2,639,833
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May. 26, 1953
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Vacuum Seal
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Ernst Schwarz |
, England |
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2,717,401
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Sep. 13, 1955
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Device for Cutting Very Fine Screw Threads
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Alexander Charles George Menzies |
, England |
Claims priority, application in Great Britain, 18 Jul., 1950. |
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Device for Cutting Very Fine Screw Threads
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George Edwin Fensom |
, England |
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Device for Cutting Very Fine Screw Threads
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Walter Zehden |
, England |
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2,853,664
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Sep. 23, 1958
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Digital Servosystem for Postioning an Adjustable Member
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Victor William Henry Towns |
, England |
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Digital Servosystem for Postioning an Adjustable Member
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David Silvester Evans |
, England |
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Digital Servosystem for Postioning an Adjustable Member
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Patrick Ludlow Fleming Jones |
, England |
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2,981,141
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Apr. 25, 1961
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Optical Compensator and Tilt Detector
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John Argent Armstrong |
, England |
Claims priority, application Great Britain 16 Jan., 1957.
Claim:
Optical instruments used in surveying and engineering, often employ a telescope of which the line of sight is required to be level when observations are taken. Heretofore it has been customary for the telescope body to be set up truly horizontal in order to ensure that the optical axis of the instrument is also horizontal, and the operations necessary to do this are both tedious and time wasting. Furthermore, when, as is usually the case, a bubble is used to obtain the level inaccuracies occur due to the sensitivity of the bubble to changes of temperature, such as may occur from the effects of direct sunlight or cold draughts. |
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Optical Compensator and Tilt Detector
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Douglas William Berry |
, England |
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