Method of retrofitting fluorescent light fixtures and punch and

Details Method of retrofitting fluorescent light fixtures and punch and Method of retrofitting fluorescent light fixtures and punch and

1994-03-01

1996-02-13

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Electrical device making

29 33M, 83 49, 83 50, 83693, 83917, 445 1, 445 2, 445 26, 445 60, H01R 4300, B21B 1500

Patent

active

054903262

ABSTRACT:
So-called "retrofitting" of old style fluorescent lighting fixtures is carried out in a punch and die press provided with a special punch and die assembly having guide blocks positioned laterally of the punch and die for receiving pre-existing notches flanking the unnotched portion of the notched edge margin of a so-called "trougher raceway" strip portion of the old fluorescent lighting feature to be retrofitted, the punch of which assembly has cutting edges configurated for piercing the metal work strip backwardly of the notched edge thereof and at the ends of a longitudinal cut to be made and at the back ends of mutually spaced lateral end cuts to be made and for executing severing stokes along such cutting edges and thereby cutting out and removing a slug of metal exactly conforming in shape and dimension to the pre-existing guide notches.

REFERENCES:
patent: 4072076 (1978-02-01), Miles
Sheet Metal Industries Jan. 1973 pp. 27-31 by Whitton.

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