GB309347A - Process for ascertaining the distance between perforations in a material, such as a cinematograph film - Google Patents

Process for ascertaining the distance between perforations in a material, such as a cinematograph film

Info

Publication number
GB309347A
GB309347A GB1881728A GB1881728A GB309347A GB 309347 A GB309347 A GB 309347A GB 1881728 A GB1881728 A GB 1881728A GB 1881728 A GB1881728 A GB 1881728A GB 309347 A GB309347 A GB 309347A
Authority
GB
United Kingdom
Prior art keywords
holes
film
width
pitch
strip
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
GB1881728A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB1881728A priority Critical patent/GB309347A/en
Publication of GB309347A publication Critical patent/GB309347A/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
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
    • G01B5/16—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures between a succession of regularly spaced objects or regularly spaced apertures

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

309,347. Imray, O. Y., (I. G. Farhenindustrie Akt.-Ges.). June 28, 1928. Perforations in kinematograph film, gauging. - Comprises a. strip 1 of wood, metal or other rigid material having a central longitudinal recess 2 of width about equal to the width of the usual film strip and having near one end two pins 3 in size and. shape corresponding to the holes in the films, from each of which pins extends a row 4 of marks in size, shape, and pitch corresponding to the holes in a standard film. The marks are black upon a white background, and the film to be tested is laid in the recess with the pins engaging two holes on opposite sides of the strip. Interference will occur when a. length of the series of holes differs from a similar length of graduations by the width of a hole or graduation and from this fact, the known length of a series of holes in a standard film, the width of the hole, and the standard pitch, the pitch of the holes under test can be calculated. The board is marked with the calculated pitch in the margins adjoining graduations where interference occurs.
GB1881728A 1928-06-28 1928-06-28 Process for ascertaining the distance between perforations in a material, such as a cinematograph film Expired GB309347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1881728A GB309347A (en) 1928-06-28 1928-06-28 Process for ascertaining the distance between perforations in a material, such as a cinematograph film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1881728A GB309347A (en) 1928-06-28 1928-06-28 Process for ascertaining the distance between perforations in a material, such as a cinematograph film

Publications (1)

Publication Number Publication Date
GB309347A true GB309347A (en) 1929-04-11

Family

ID=10118912

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1881728A Expired GB309347A (en) 1928-06-28 1928-06-28 Process for ascertaining the distance between perforations in a material, such as a cinematograph film

Country Status (1)

Country Link
GB (1) GB309347A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116202398A (en) * 2023-05-06 2023-06-02 蒂升电梯(中国)有限公司成都分公司 Elevator installation clearance measuring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116202398A (en) * 2023-05-06 2023-06-02 蒂升电梯(中国)有限公司成都分公司 Elevator installation clearance measuring device

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