File:Practical plumbers' work, with numerous engravings and diagrams; (1905) (14578041659).jpg

Identifier: practicalplumber00hasl (find matches)
Title: Practical plumbers' work, with numerous engravings and diagrams;
Year: 1905 (1900s)
Authors: Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed
Subjects: Plumbing
Publisher: Philadelphia, D. McKay
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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emical action is setup, hydrogen gas being generated. This, when the tapo is turned on, is conveyed along a rubber tube to ajunction, where it is mixed with air, forced along from thebellows (Fig. 175) and carried to the jet, which is a smallbrass tube with a cap screwed on the end. In this cap isa small hole, through which the gas is emitted, and whena light is applied to it a long, thin jet of flame is produced,which gives little or no light, but an intense heat, andwhen the flame is applied to the surface of metal it readilyfuses it. Should such a machine come into the hands ofthe reader, it should be operated as follows:—When themachine is charged with the acid, water, and zinc, and theometer is immersed, open the tap at the top and let outthe air. Then close it, and allow the machine to stand fora short time, until the aeid has begun to act on the zinc.Meanwhile connect the pipes to the tap and the bellows,and then, whilst an assistant operates the bellows, the LEAD EUBNING. 91
Text Appearing After Image:
v/,, .;--, ./ ^^<^ %&^^J KIP 7^/^ , y -:■ ~, .TT^Z, v/^y 1 <st Fig. 175.—Hand Bellows Fig. 174.—Lead-burners Old Type ofG-as-generating Machine. 92 PRACTICAL PLUMBERS WORK. gas may be turned on. When the flame is adjusted, applythe jet of flame to the prepared seam in the manner ex-plained later in the chapter. The hottest part of the flameis the centre of the thickest portion, usually about 1 in.from the cap. Proficiency will be attained after a littlepractice. A complete machine for lead-burning can be madesimply and easily if the following directions are observed.Illustrations of the machine are shown in diagram form sothat the construction of the machine may be the more o H. i. 2 n Fig. I T TO I ii Hi 1 illOil 1 fill ell Hi! i Enlarged View ofCup-valve. L__i Fig. 176.—Air Chamber of Lead-burning Machine. easily understood. The air chamber (Fig. 176) supplies, acurrent of air and the device (Fig. 177) supplies the hydro-gen gas ; tubes from the two chambers are co

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