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32 forging- Stamping - Heat Treating
the design has been clearly demonstrated. to various kinds of work may be easily
The lower set of counterweights start the applied by securing them to the body
bolls and the upper set close the die with the two screws provided. For the
heads. In the photograph of the rear inspection of small pieces and specimens
view of the machine, the left hand spindle the microscope may be attached to the
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FIG. 5—Zeiss microscope fitted for laboratory use
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has received and is cutting a bolt, the column of a stand, the knee of which is
second spindle is being entered, and the adjustable by rack and pinion.
die head of the third spindle is just clos­ The microscope for structure testing
ing.
may be illuminated by daylight or by
A complete change of set up can be means of an electric lamp. In this case,
made in 10 minutes, and if the set up is the source of light is a low current incan­
merely from length to length, the change descent lamp consuming 0.4 amp., the
can be made in one minute on all six voltage
spindles.
being 4. The current may be
A NOVEL MICROSCOPE
Carl Zeiss of Jena. Germany, offers a
microscope entirely different from usual
lines, so as to meet the demands of both
the scientific laboratory and of the shop,
and to make it suitable for objects of the
most diversified shapes. The instrument
is sufficiently rigid and easy to apply so
that it may be given into the hands of
the foreman for the inspection of work
during any stage of finishing or for making
tests in connection with the heattreating
department, whereby valuable
information about annealing periods,
hardening temperatures, carbonizing me­
dia, etc.. may be obtained.
The microscope may be used for inspecting
shafts, cylindrical pieces, shoulders
and fillets in crank shafts, bent
shafts, eccentrics and plain surfaces.
Other attachments for adapting the tool
-
"
January, 1925
work of various shapes, and that the use
of this instrument will open up a new
field of research.
The microscope is not confined to the
examination of test pieces and specfmens,
but shows defects of material used
in the finished product. It gives valuable
information regarding the manufacturing
processes and the changes in
structure caused by faulty heat treatment,
cutting or grinding operations. In order
to produce the grain the metal is first
cut by planing, milling or sawing and the
surfaces to be inspected are lapped and
polished until all scratches disappear.
Care should be taken not to heat the
metal unduly when cutting or grinding.
The grain is then produced by the use
of etching reagents, which act differently
on the various components and thus
make them distinguishable under the
microscope.
For laboratory use the microscope is
furnished with base, bellows, shutter,
plate holders, condenser lens and lamp.
George Scherr, 143 Liberty Street, New
York, is exclusive American representative
for this instrument.
FIG. 7—Procunier double jaw quick change chuck.
furnished by a storage battery or taken
from a 110 or 220 volt current by interposing
a reducing rheostat.
It will be readily seen from the illustrations
that the microscope tills a distinct
need in the shop for inspecting
FIG. 6—Carl Zeiss portable microscope and equipment.
QUICK CHANGE CHUCK
William L. Procunier, 18 South Clinton
Street, Chicago, 111., has recently placed
on the market a new "double jaw" quick
change chuck. By adapting this tool on
a single spindle drill press it can be converted
into a semi-multiple spindle press,
as it is not necessary to stop the machine
to change tools in the chuck. When the
operator lifts up a sleeve or collar, it
allows two balls to slide out of the
pocket of the collet, allowing it to drop
in the operator's hand, and a different
one may be inserted in the chuck without
moving the work out of alignment.
There are several different types of
collets which will handle all classes of
tools, such as taper shank drills, and
reamers, machine taps, round button dies
and blanks, which can be made to suit
special requirements. The collets as well
as the chuck are of hardened steel and
ground throughout, assuring durability and
accuracy.