GB1419523A - Strain indicators - Google Patents

Strain indicators

Info

Publication number
GB1419523A
GB1419523A GB5728972A GB5728972A GB1419523A GB 1419523 A GB1419523 A GB 1419523A GB 5728972 A GB5728972 A GB 5728972A GB 5728972 A GB5728972 A GB 5728972A GB 1419523 A GB1419523 A GB 1419523A
Authority
GB
United Kingdom
Prior art keywords
adhesive
window
bolt
pin
capsule
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
GB5728972A
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.)
MODULUS CORP
Original Assignee
MODULUS CORP
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
Priority claimed from US00207260A external-priority patent/US3799108A/en
Priority claimed from US00310445A external-priority patent/US3850133A/en
Application filed by MODULUS CORP filed Critical MODULUS CORP
Publication of GB1419523A publication Critical patent/GB1419523A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • F16B31/025—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load with a gauge pin in a longitudinal bore in the body of the bolt
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

1419523 Making strain indicators MODULUS CORP 12 Dec 1972 [13 Dec 1971 29 Nov 1972] 57289/72 Heading B3A [Also in Divisions F2 and G1] A bolt having a strain indicator is made by the series of steps shown in Figs. 4a to 4l. A bolt 80 is drilled to provide a bore 22, a counterbore 24 and a pilot hole 26. An indicator capsule assembly is prepared by securing a glass window 56 in a ferrule 52 with adhesive, filling the ferrule with a light adsorbing liquid 64, placing the head of a pin 30 in the liquid such that the coloured end 42 of the pin abuts the window, and compressing the inner portion 74 of an elastomeric sealing member 60 between the inner wall of the ferrule and the pin 30. The end 32 of pin 30 is secured in pilot hole 26 with adhesive, and the ferrule 52 is then secured in the counterbore 24 with adhesive. A modified bolt having a strain indicator is made by the series of steps shown in Figs. 9a to 9m. A bolt 116 is drilled to provide a bore 122, a counterbore 124 and a pilot hole 126. A pin 130 is cut to the precise required length as determined by gauging the bolt 116, and is then fixed by adhesive in the pilot hole 126. An indicating capsule is prepared by taking a plastics body 170, inserting an indicating member consisting of a magnet 176 adhered to a plastics member 172, adding a light adsorbing liquid 164 to the body, bringing a glass or plastics window 156 into position to seal the capsule body, excess liquid escaping through vents 188 in the window (Figs. 6 and 8, not shown) and adhering the window to the capsule body. The capsule is then secured in counterbore 124 by adhesive and staking. The capsule body 170 and the member 172 may be a fluorocarbon and the window an acrylic. In both embodiments the adhesive connections may be replaced by other types of connection.
GB5728972A 1971-12-13 1972-12-12 Strain indicators Expired GB1419523A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US00207260A US3799108A (en) 1971-12-13 1971-12-13 Strain indicator and method
US00310445A US3850133A (en) 1972-11-29 1972-11-29 Strain indicator and method

Publications (1)

Publication Number Publication Date
GB1419523A true GB1419523A (en) 1975-12-31

Family

ID=26902092

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5728972A Expired GB1419523A (en) 1971-12-13 1972-12-12 Strain indicators

Country Status (6)

Country Link
JP (1) JPS4866876A (en)
BE (1) BE792652A (en)
DE (1) DE2260657A1 (en)
FR (1) FR2167015A5 (en)
GB (1) GB1419523A (en)
SE (1) SE384920B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3726562A1 (en) * 1986-09-29 1988-04-07 Nitto Kohki Co CLAMPING DEVICE
GB2195459A (en) * 1986-09-29 1988-04-07 Nitto Kohki Co Indicating tightness of a fastener
CN108571504A (en) * 2018-05-08 2018-09-25 上海威纳工程技术有限公司 Accurate pretension bolt
CN114109994A (en) * 2021-11-08 2022-03-01 奇瑞汽车股份有限公司 Bolt and fastening structure

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5170075A (en) * 1974-12-12 1976-06-17 Seiki Kogyo Kk KOSHIKAKESHIKITEEBURUKOTATSUSOCHI
US4041776A (en) * 1976-03-22 1977-08-16 Modulus Corporation Strain indicator
JPS63135604A (en) * 1986-11-27 1988-06-08 株式会社日本製鋼所 Friction type clamping device
US20090206705A1 (en) * 2008-02-19 2009-08-20 Nies Jacob J Fasteners with welded ultrasonic stress transducers
JP6234104B2 (en) * 2013-08-05 2017-11-22 株式会社ケー・エフ・シー Tunnel axial force display mechanism, tunnel axial force display bolt, and tunnel excavation method
US10316881B2 (en) * 2014-07-30 2019-06-11 Integrity Engineering Solutions Pty Ltd Fasteners
JP7249702B1 (en) * 2022-07-11 2023-03-31 芳隆 秋野 Bolt with looseness sensor, its usage and looseness detection system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3726562A1 (en) * 1986-09-29 1988-04-07 Nitto Kohki Co CLAMPING DEVICE
GB2195459A (en) * 1986-09-29 1988-04-07 Nitto Kohki Co Indicating tightness of a fastener
GB2195563A (en) * 1986-09-29 1988-04-13 Nitto Kohki Co Clamping apparatus
US4771999A (en) * 1986-09-29 1988-09-20 Nitto Kohki Co. Ltd. Clamping apparatus
US4793751A (en) * 1986-09-29 1988-12-27 Nitto Kohki Co., Ltd. Opti-mechanical torque indicating connecting member
GB2195563B (en) * 1986-09-29 1990-09-12 Nitto Kohki Co Clamping apparatus
GB2195459B (en) * 1986-09-29 1990-12-19 Nitto Kohki Co Fastner
CN108571504A (en) * 2018-05-08 2018-09-25 上海威纳工程技术有限公司 Accurate pretension bolt
CN114109994A (en) * 2021-11-08 2022-03-01 奇瑞汽车股份有限公司 Bolt and fastening structure
CN114109994B (en) * 2021-11-08 2022-09-16 奇瑞汽车股份有限公司 Bolt and fastening structure

Also Published As

Publication number Publication date
FR2167015A5 (en) 1973-08-17
DE2260657A1 (en) 1973-06-20
JPS4866876A (en) 1973-09-13
SE384920B (en) 1976-05-24
BE792652A (en) 1973-03-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee