Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1975-06-17
1976-07-06
Moon, Charlie T.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29453, 113116G, 417363, B23P 1500
Patent
active
039673529
ABSTRACT:
A method for making a scroll type housing for a centrifugal blower wherein a flat discharge plate is provided with a rectangular discharge opening and a pair of lugs are spaced from each of a first pair of opposing parallel edges of the opening. Narrow upstanding flanges along the edges are spaced slightly from the lugs and the second pair of opposing edges of the opening are each provided with a narrow elongated portion which is offset to a shallow depth in the direction of the flanges. A scroll member is provided in an elongated generally flat flexible sheet of material with a narrow end flange formed integrally along each end edge. The flanges project generally in the same direction and the member also has a reverse bend adjacent one end approximately in the form of a desired final configuration of a "cut-off" section of the housing. Three lanced openings are spaced apart along each side edge of the member. The scroll member is bent arcuately and the flanged ends thereof are brought toward each other and inserted through the opening in the discharge plate so as to reside respectively in the offset portions. Thereafter, a pair of similar flat side plates formed of sheet material in a scroll configuration and with linear edges at their discharge ends are assembled within the scroll. A first side plate has its linear edge entered between an adjacent flange and pair of lugs with the opposite end of the plate inclined within the scroll and the plate is then urged to a final upright position at the scroll edge. Three lugs on the plate enter the three openings in the scroll and the plate is thus held in assembled position. The second side plate is then assembled within the scroll in an identical manner.
REFERENCES:
patent: 1526917 (1925-02-01), Leland
patent: 1926947 (1933-09-01), Hull
patent: 1931151 (1933-10-01), Mueller
patent: 3117715 (1964-01-01), Bloomingdale
patent: 3401870 (1968-09-01), Crowe
patent: 3469772 (1969-09-01), McDonald
patent: 3653116 (1972-04-01), Lov
patent: 3803690 (1974-04-01), Cann
Moon Charlie T.
Torin Corporation
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