GB624854A - Improvements relating to means for tracing or checking the contours of shaped profiles - Google Patents

Improvements relating to means for tracing or checking the contours of shaped profiles

Info

Publication number
GB624854A
GB624854A GB3383745A GB3383745A GB624854A GB 624854 A GB624854 A GB 624854A GB 3383745 A GB3383745 A GB 3383745A GB 3383745 A GB3383745 A GB 3383745A GB 624854 A GB624854 A GB 624854A
Authority
GB
United Kingdom
Prior art keywords
arms
repeater
follower
tracing
profile
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
GB3383745A
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.)
RAYMOND HENRY BIGGS
Power Jets Research and Development Ltd
Original Assignee
RAYMOND HENRY BIGGS
Power Jets Research and Development 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 RAYMOND HENRY BIGGS, Power Jets Research and Development Ltd filed Critical RAYMOND HENRY BIGGS
Priority to GB3383745A priority Critical patent/GB624854A/en
Publication of GB624854A publication Critical patent/GB624854A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/2425—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures of screw-threads

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

624,854. Surface and outline gauges. POWER JETS (RESEARCH & DEVELOPMENT), Ltd., and BIGGS, R. H. Dec. 13, 1945, No. 33837. [Class 106 (ii)] [Also in Group XX] Apparatus for indicating the profile of a work-piece comprises a pivoted follower arm adapted to traverse the profile and a pivoted repeater arm actuated by the follower arm, the follower and repeater arms having respectively exploring and tracing parts of finite size and effectively of circular cross-section so that the tracing part will sweep a path whose width is also finite and of which one side is always related in shape to the profile traversed by the exploring part and the tracing part being combined with an optical projector so that a shadow of the tracing part is projected upon a screen. The apparatus shown incorporates two pairs of follower and repeater arms so that both sides of a profile may be examined simultaneously. A turbine blade 1 under test is mounted on a support (not shown) adjustably secured to a base 3 having guides for a transversely movable support 5. Two rigid extensions of the support 5 carry respectively a pair of follower arms 9, 19 and a pair of repeater arms 12, 20. The arms are in the form of bellcrank levers and the follower arms, which may be spring-loaded to ensure contact with the test surface, are connected to their respective repeater arms by links 14, 21, one of which may be adjustable. The exploring and tracing ends of the follower and repeater arms respectively are preferably formed by rotatably mounted balls. An enlarged image of the tracing end of the repeater arm is projected on to a screen 17 by means of a light source (not shown), a collimator 15 and a lens 16. The base 3, which carries the lens 16, may be arranged to slide on rails in order to vary the degree of magnification or lenses of different focal lengths may be used. By traversing the support 5 and observing the position of the image on the screen at intervals, the profile may be checked against an enlarged true profile. Specification 616,970 is referred to.
GB3383745A 1945-12-13 1945-12-13 Improvements relating to means for tracing or checking the contours of shaped profiles Expired GB624854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3383745A GB624854A (en) 1945-12-13 1945-12-13 Improvements relating to means for tracing or checking the contours of shaped profiles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3383745A GB624854A (en) 1945-12-13 1945-12-13 Improvements relating to means for tracing or checking the contours of shaped profiles

Publications (1)

Publication Number Publication Date
GB624854A true GB624854A (en) 1949-06-17

Family

ID=10358085

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3383745A Expired GB624854A (en) 1945-12-13 1945-12-13 Improvements relating to means for tracing or checking the contours of shaped profiles

Country Status (1)

Country Link
GB (1) GB624854A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113485A (en) * 1961-06-21 1963-12-10 Dietrich Cornelius Frank Optical projection pantometers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113485A (en) * 1961-06-21 1963-12-10 Dietrich Cornelius Frank Optical projection pantometers

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