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The direct tension indicators shall conform to required chemical composition, compression load, and dimensional values." [ 5 ] Like other fastener components, DTIs are covered by the Fastener Quality Act of 1999 in section 3: Definitions (6), [ 6 ] where a DTI is described as "a load-indicating washer, that is through-hardened".
These bolts, usually tension control bolts or compressible washer tension indicating type bolts, are tensioned to a minimum required amount to generate large enough friction forces between the faying surfaces such that the shear (or tension) load is transferred by the structural members and not by the bolts (in shear) and the connection plates ...
Another method that indicates tension (mainly in erecting steel) involves the use of crush-washers. These are washers that have been drilled and filled with orange RTV. When a given force has been applied (± 10%), orange rubber strands appear. Large-volume users (such as auto makers) frequently use computer-controlled nut drivers. With such ...
This type of washer is especially effective as a lock washer when used with a soft substrate, such as aluminium or plastic, [8] and can resist rotation more than a plain washer on hard surfaces, as the tension between washer and the surface is applied over a much smaller area (the teeth). There are four types: internal, external, combination ...
U.S. patent 568,177 - Apparatus for Producing Ozone - 1896 September 22 - Primarily provides a simple, cheap, and effective apparatus for the production of ozone (or such gases); Obtained by the action of high-tension electrical discharges; Related to US462418 (November 3, 1891) and US454622 (June 23, 1891); In combination with a low self ...
ISO 887:2000 Plain washers for metric bolts, screws and nuts for general purposes — General plan; ISO 888:2012 Fasteners — Bolts, screws and studs — Nominal lengths and thread lengths; ISO/R 889:1968 Test code for stationary steam generators of the power station type [Withdrawn without replacement]
Belleville washer. A Belleville washer, also known as a coned-disc spring, [1] conical spring washer, [2] disc spring, Belleville spring or cupped spring washer, is a conical shell which can be loaded along its axis either statically or dynamically. A Belleville washer is a type of spring shaped like a washer.
A tension meter is a device used to measure tension in wires, cables, textiles, Mechanical belts and more. Meters commonly use a 3 roller system where the material travels through the rollers causing deflection in the center roller that is connected to an analog indicator or load cell on digital models. [1]