Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1977-03-31
1978-03-28
Mehr, Milton S.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
113118D, 228165, 228173C, B23P 1526
Patent
active
040807010
ABSTRACT:
A simplified method for the fabrication of a fireplace water jacket, and the water jacket produced by the fabrication method. Each of several walls of a water jacket is formed from first and second metal plates. The first metal plate of each wall is disposed in a generally horizontal position on an orificed support, and a punch is brought into operative engagement therewith to punch a hole in the plate and simultaneously deform the area surrounding the hole so that the plane of the hole is spaced a given distance as from the plane of the plate. The first plate is then placed on the second plate so that the plates are generally parallel and so that the area surrounding the hole in the first plate abuts the second plate, and then the plates are secured together by welding around the area defining the hole in the first plate to the portion of the second plate visible through the hole in the first plate. The plates when joined together are spaced apart a distance S and water may circulate between the plates. The various walls are joined together to form a water jacket having an inlet and an outlet, and preferably at least three walls are provided including two sides and a back wall. The bottom of the water jacket may be formed by a header extending between the two side walls and a plurality of water-conducting, log supporting pipes extending generally perpendicular to the header from the header to the back wall of the water jacket. The pipes are disposed at a small positive angle (1.degree. to 2.degree.) with respect to the horizontal.
REFERENCES:
patent: 2550174 (1951-04-01), Towner
patent: 3958755 (1976-04-01), Cleer, Jr.
patent: 4025043 (1977-06-01), Cleer, Jr.
Mehr Milton S.
Ridgway Steel Fabricators, Inc.
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