GB518148A - Improvements in or relating to mounts for graduated circle plates - Google Patents

Improvements in or relating to mounts for graduated circle plates

Info

Publication number
GB518148A
GB518148A GB2755138A GB2755138A GB518148A GB 518148 A GB518148 A GB 518148A GB 2755138 A GB2755138 A GB 2755138A GB 2755138 A GB2755138 A GB 2755138A GB 518148 A GB518148 A GB 518148A
Authority
GB
United Kingdom
Prior art keywords
plate
mount
circle plate
grooves
hemispheres
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2755138A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EDWARD WILFRED TAYLOR
Cooke Troughton and Simms Ltd
Original Assignee
EDWARD WILFRED TAYLOR
Cooke Troughton and Simms Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EDWARD WILFRED TAYLOR, Cooke Troughton and Simms Ltd filed Critical EDWARD WILFRED TAYLOR
Priority to GB2755138A priority Critical patent/GB518148A/en
Publication of GB518148A publication Critical patent/GB518148A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C1/00—Measuring angles
    • G01C1/02—Theodolites
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C1/00—Measuring angles
    • G01C1/02—Theodolites
    • G01C1/06—Arrangements for reading scales

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

518,148. Indicating - apparatus. COOKE,'TROUGHTON, & SIMMS, Ltd., TAYLOR, E. W., and HARRISON, J. W. Sept, 21, 1938, No. 27551. [Class 106 (iv)] [Also in Group XX] , In order to maintain the concentricity of a graduated glass &c. circle plate in a theodolite &c. during changing temperature the circle plate 1 is carried by the mount 2 . through intermediate members such as balls 8 or the like to permit relative radial movement, between the plate and the mount. The mount comprises an annular ring secured to a spigot 3 and is provided with three radial grooves 7, in each of which a ball 8, positioned by a cage 9, is located, the glass plate being, if desired, furnished with similar grooves 6 or with recesses. The grooves may take various forms in cross-section and rollers, semi-cylinders, or hemispheres may replace the balls 8, the hemispheres or semi-cylinders being preferably cemented to the underside of the circle plate. A spring 10 is provided bearing upon the circle plate. Specification 430,275 is referred to.
GB2755138A 1938-09-21 1938-09-21 Improvements in or relating to mounts for graduated circle plates Expired GB518148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2755138A GB518148A (en) 1938-09-21 1938-09-21 Improvements in or relating to mounts for graduated circle plates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2755138A GB518148A (en) 1938-09-21 1938-09-21 Improvements in or relating to mounts for graduated circle plates

Publications (1)

Publication Number Publication Date
GB518148A true GB518148A (en) 1940-02-19

Family

ID=10261432

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2755138A Expired GB518148A (en) 1938-09-21 1938-09-21 Improvements in or relating to mounts for graduated circle plates

Country Status (1)

Country Link
GB (1) GB518148A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640267A (en) * 1949-06-30 1953-06-02 Keuffel & Esser Co Theodolite
US2667693A (en) * 1949-03-05 1954-02-02 Keuffel & Esser Co Surveying instrument
DE1021174B (en) * 1954-10-14 1957-12-19 Filotecnica Salmoiraghi S P A Fixing device for the pitch circles of theodolites
US2915826A (en) * 1959-12-08 Bruscaglioni
US3931947A (en) * 1974-04-11 1976-01-13 Essilor International (Compagnie Generale D'optique) Adjustable base, notably for topometry apparatus
US4290574A (en) * 1980-06-02 1981-09-22 Archibald John H Kinematic restraint

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2915826A (en) * 1959-12-08 Bruscaglioni
US2667693A (en) * 1949-03-05 1954-02-02 Keuffel & Esser Co Surveying instrument
US2640267A (en) * 1949-06-30 1953-06-02 Keuffel & Esser Co Theodolite
DE1021174B (en) * 1954-10-14 1957-12-19 Filotecnica Salmoiraghi S P A Fixing device for the pitch circles of theodolites
US3931947A (en) * 1974-04-11 1976-01-13 Essilor International (Compagnie Generale D'optique) Adjustable base, notably for topometry apparatus
US4290574A (en) * 1980-06-02 1981-09-22 Archibald John H Kinematic restraint

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