Quieted fast acting switch assembly with visco-elastic polymer l

Details Quieted fast acting switch assembly with visco-elastic polymer l Quieted fast acting switch assembly with visco-elastic polymer l

1988-12-21

1990-03-27

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Sequential operations

200237, 200288, H01H 900, H01H 360

Patent

active

049122894

ABSTRACT:
A relatively quiet switch assembly having a plurality of spaced contact sets with snap-acting transfer actuation and interconnected by a common bus plate. The bus plate is formed of a swandwich construction having a thin (0.001 Inch) core layer of visco-elastic polymer and thicker layers of copper bonded to both sides of the core layer for sound attenuation upon contact transfer. Where the bus plate is formed to a right-angle bend of R/t-1.2 the inner layer is formed of half-hard material and the outer layer of fully annealed material.

REFERENCES:
patent: 3244848 (1966-04-01), Chapin et al.
patent: 4703139 (1987-10-01), Dunlap
Pre Finish Metals, Inc., Product Brochure "PCX-12 Sounds Damping Steel", 2 pages (no date).
Olin Metals Research Laboratories, J. C. Fister et al., "Degradation and Recovery of Damping in Incramute", Jan. 1978, 26 pages.
International Copper Research Association, Inc.; Product Brochure "INCRAMUTE", 4 pages (no date).
International Harvestor Co., Solar Div.; A. N. Hammer et al.; "Development of Composite Incramute I Steel Sandwich Structures for use as Circular Saw Blades", Mar. 1975, 31 pages.
Specialty Composites Corp.; "How to Work and Join Tufcote Noiseless Steel"; 4 pages (no date).
Wyle Laboratories; Rex Sinclair; "Study of Noise and Vibration Control Applications of Incramute High Damping Alloy"; Apr. 1974, 105 pages.

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