PRISMATIC INSTRUMENTS, INC. is pleased to announce that after several years of research we have designed and
developed a facet heat which derives the angle of cut from an LED electronic digital readout display meter. This digital
display meter has a synchronous reading with the movement of the dop arm. In other words, when the dop arm is moved
up or down, the digital display meter registers this movement. Calibration is in tenths of degrees. Each tenth equals six
minutes. The advantage of this system is reading direct numerals instead of matched line reading such as found on
protractor or dial machines. The sensitivity of the digital display is in tenths of degrees which exactly repeats to a given
angular position without backlash error. Therefore, the operator may see both the angle in numerals while at the same
time being able to anticipate a stop point at a very precise accuracy. The facet head is of the side mount counter balance
dop arm design. The dop arm pivot bearings are sealed ball bearings. It also incorporates two cheaters, one a
compound angle cheater, and the other a full radial tooth splitter.
The dop arm is concentrically adjustable (Pat. #4,265,057) utilizing a floating collet for use with 1/4" dops. This facet head
will fit on any of our present uprights. However, a new radial upright has been designed which is one inch in diameter and
is stainless steel.
H-82 PRISMATIC ANGLEOMETER Facet Head
Weight - 12 lbs.
Digital Angle graduations 1/10 degree Positive angle stop
For repeat pressure reading. Registers the pressure that the operator exerts on the dop arm. The face of the dial can be
adjusted or turned so that a light or heavy pressure can be registered. For a light pressure the indicator at rest should
read .001 to .002 minus zero. For a heavy pressure .003 to .006 minus zero. Pressure is then exerted by the operator
on the dop arm until the indicator pointer reaches zero
Precision Four Jawed Collet Chuck:
This chuck is a threaded self-centering type operated by hand, no set screw to cause misalignment due to uneven
adjustment or pressures. The chuck is hexagonal which allows a wrench to be used for tightening or loosening if needed.
Set Screw in Collet End of Dop Arm: This set screw is a dop arm alignment feature which permits removal and
replacement of the dop without need to readjust for previous alignment. The Standard Transfer Block is equipped with the
same keying or alignment system, thereby assuring relative alignment of crown facets to pavilion facets.
Keyed Dops: Radial self-aligning.
Dop Arm, 4: long (adjustable for concentricity to .00025 runout)..
Quick release knob
Micro height travel 1 1/4"
Coarse height travel 10 1/2"
Upright - 18" height, 1" diameter, stainless steel
Compound angle splitter
Micro Angle Stop Fine Adjustment
Radial index tooth splitter, one knob self-locking
Index gear easily changed without removing dop arm. The dop arm pivots on precision double sealed ball bearings.
B69-A PRISMATIC Base
Low profile, 2"
Weight - 28 lbs.
Speed 25 - 1800 RPM
Torque 70 inch ounces
Timken Precision roller bearing arbor which is adjustable for perpendicular plane with the upright. This adjustment is
similar to the leveling adjustment found on surveying transits.
Prismatic H 82 Angleometer LED Electronic Digital Angle Display
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