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US 5,490,326 AGranted
Method of retrofitting fluorescent light fixtures and punch and die assembly therefor
OwnerLyman O. Nielsoninventor
Life of this patent
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OwnerLyman O. Nielsoninventor
Estimating the term…
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.
A method of retrofitting fluorescent lighting fixtures for the installation of electrical sockets at locations along edge margins of trougher raceways of such fixtures previously not prepared to receive such electrical sockets, comprising inserting the previously notched edge margin of the trougher raceway concerned in a punch and die press equipped with a punch and die assembly capable of notching such edge margin and with work placement guide means arranged laterally of the punch and die components of said assembly so that said work placement guide means extend into existing notches of said edge margin of the trougher raceway concerned in abutting relationship with portions thereof that establish the proper setting for the punch and die components of said assembly in punching out a required new electrical socket-receiving notch in the trougher raceway concerned;
A punch and die assembly for use in a punch and die press for retrofitting fluorescent lighting fixtures to receive new electrical sockets at locations along notched edge margins of trougher raceways thereof previously not prepared to receive such electrical sockets, comprising cooperating punch and die components capable of notching such an edge margin;
Dependencies are inferred from the claim text.