Method of forming a spring-like fire strip

Details Method of forming a spring-like fire strip Method of forming a spring-like fire strip

1989-10-30

1990-09-11

Rosenbaum, Mark

Metal working

Method of mechanical manufacture

Structural member making

29173, 29445, 29446, 2989735, 52488, 72181, B23P 1904

Patent

active

049551345

ABSTRACT:
A fire strip for a suspended grid ceiling has an inner spring steel web having a slightly arcuate cross section, and an outer web of soft steel wrapped around the inner web. A finished strip is formed by bending the strip normal to the strip body at both ends. When the ends are bent, a spring-like, yieldable, upwardly curved arch is formed which fits snugly against a panel when in place in a ceiling.

REFERENCES:
patent: 2099961 (1937-11-01), McLaughlin, Jr.
patent: 2158656 (1939-05-01), Frank
patent: 2305793 (1942-12-01), Puppe
patent: 3473282 (1969-10-01), Robinson, Jr.
patent: 3570293 (1971-03-01), Blaski
patent: 4125936 (1978-11-01), Rozmus
patent: 4351886 (1982-09-01), Howie, Jr.
patent: 4448006 (1984-05-01), Worley
patent: 4594832 (1986-06-01), Akins

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