The morning call. [volume] (San Francisco [Calif.]) 1878-1895, 1890-10-05

The wire is flattened out at one end and u
few twists put in it, which will make it rep
resent twis. In the center of the tiattened
end make small hole with your center
punch, also small hole in the center of the
leaf, through which place brass escutcheOn
pin. Cut off the end of the pin with the
pliers, rivet the two together by placing the
head of the pin upon some hard substance,
and then give the other end few gentle
taps with the hammer 1t is now ready to
lie soldered. Soft soldering is done by means
Of a copper bit, using powdered sal-ammo-
mac and water as lux. or fine powdered
resin. Ii the copper bit has not previously
been timed it is heated in stove or other
wise to duh red and hastily filed to clean
the metallic surface 1t is then immedi-
ately rubbed, first upon lump of sal
ammOniac and next on your bar of
solder. This will completely coat the tool.
1t is necessary in soft soldering to clean the
parts which are to be joined together, pro-
vidlng they have not previously been timed.
In filing or scraping the parts when the
edges are brought together, they are Slightly
strewed with the pow dered resin, which
should be in little box containing piece
OF metal or spoon to deposit the Iesin.
You now take the soldering bit in your
right hand. placing the bolt on your SOLDER
which will take up sufficient to tack the
parts together. When the parts are jUne d,
take the solder in your left hand and melt
off as much as the joint may require, and
then flush with the end of your bit.
SOFT SOLDERING.
Another method for soft soldering for
small work is by means OF the mouth blow
pipe (See tools.
The mouth blowpipe is a light, cOncal
brass tube, about ten or twelve inches long,
from half an inch to 4 quarter of an inch in
diameter at the end for the mouth, and
about one-siXteenth of an inch at the aper-
ture or jet. The end is bent like a quad
rant, so that the flames may be directly
under observation.
The lungs may be used for this blowpipe
with much more effect than might be eX-
pected. With little practice a constant
stream Of air may be maintained for many
minutes If the cheeks are kept well filled so
that their elasticity shall serve to impel
part Of the air, while the ordinary breathing
Is carried on by means of the uostrils.
The most intense heat of the blOwpipa is
that OF the pointed flame. With a thick
candle or small jet OF gas and a bowpipe
placed slightly within the flame any soft
soldering, or even silver soldering, can be
done by using the same huX as before men
toned. and touching the parts with thin
strip OF solder as they get sufficiently heated
to cause the metal to flow. A good soft
solder Is made OF two parts OF tin and one
part of lead, melted together and poured
into thin strips or ribbons from Il ladle.
which is tralled along a fiat stone or iron
plate so that the size of the solder may
always be proporti0nate to that of the work.
give this method Of soldering to suit the
requirements Of some who may wish to work
this way. Preferably, silver solder should
be used for all brass work, which requires
TO be neatly done. from the superior fusl-
bility Of silver solder and from its combining
so we'll with other metals and the sparing
manner in which it can be used, making so
clean a joint that il requires no finishing
BraZng and silver soldering are essentially
tie same. Brazing is best adap.ed for large