Apparatus for measuring the pre-tension of a threaded bolt

Details Apparatus for measuring the pre-tension of a threaded bolt Apparatus for measuring the pre-tension of a threaded bolt

1978-10-26

1980-01-29

Goldberg, Gerald

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Threaded fastener stress

81 5738, G01L 524

Patent

active

041855060

ABSTRACT:
An arrangement for measuring the pre-tension of a threaded bolt having a central drill hole. A part is fastened to the lowest point of the drill hole and the difference in length of the part relative to the threaded bolt is determined via a length measuring device. An electric holding magnet, introduced into the hole, is fastened to a cable running from a cable drum and carrying an electromagnet, which, when excited, adheres to the closed hole at its lowest point; the cable is tightened and its length is held constant by a ratchet. The cable drum is movably supported on a tube connected to the threaded bolt in such a manner that, when the cable is loose, its carrier is pushed by a spring surrounding the tube against an upper flange on the tube; a length measuring device borne on the carrier contacts a surface of the tube. The measurement is performed with the cable tightened and its length held constant by the ratchet.

REFERENCES:
patent: 2562831 (1951-07-01), Stone
patent: 2995033 (1961-08-01), Stifano, Jr.
patent: 3162071 (1964-12-01), Biach
patent: 3837694 (1974-09-01), Frisch et al.
patent: 3877326 (1975-04-01), Kock et al.
patent: 3943819 (1976-03-01), Charron
patent: 3995828 (1976-12-01), Orban

Affiliated with

Also associated with

Rating

Apparatus for measuring the pre-tension of a threaded bolt does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for measuring the pre-tension of a threaded bolt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for measuring the pre-tension of a threaded bolt will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-875579