Method for the manufacture of the casing for a parrot-type locki

Details Method for the manufacture of the casing for a parrot-type locki Method for the manufacture of the casing for a parrot-type locki

1989-06-08

1990-11-27

Spruill, Robert L.

Metal deforming

Process

Deforming sheet metal

291606, 29557, 72338, B21C 3702, B21D 2826

Patent

active

049726978

ABSTRACT:
A method of manufacturing a casing of a "Parrot-type" locking device; this kind of locking device is currently used in manufacturing ornamental items. The metallic band from which the flat structure (1) is punched is engraved with the track (2) and the markings (7), then the slot (8) is cut together with the outline of the structure (1) that will later be formed into a hairpin bend along its axis of symmetry in order to house the spring trigger in its central part while the upper end is flattened and bent as a hook thus giving origin to the operating ring (9) of the locking device.

REFERENCES:
patent: 990526 (1911-04-01), Coble
patent: 1562482 (1925-11-01), Woernle
patent: 1702596 (1929-02-01), Crockett
patent: 2483091 (1949-09-01), Glos
patent: 2566459 (1951-09-01), McCoy
patent: 4785868 (1988-11-01), Koenig, Jr.

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