Schaff Piano Product Catalog - page 60

This unit is larger than our No. 800 Support Jack, but
accomplishes the same job of supporting grand piano pin
blocks during repinning . The top and bottom boards are
laminated maple measuring 11” L x 4-1/2” W x 1-3/4” H.
Height is easily adjusted by turning the hex nuts.
No. 799 -
Pin Block Support. Each
Developed by Jerry O’Connell, who formerly was on the
technical staff of Wurlitzer Piano Company, this tool should
become a standard tool box item for every piano tuner.
It is generally agreed among technicians that there are
numerous reasons for false beats, however, the Important Fact
is that after two years of field testing this tool on hundreds of
pianos, Mr. O’Connell has eliminated or minimized 75% to
80% of the false beats he encountered while pitch raising.
Most false beats are found in the piano’s treble section and
are noticeable when doing pitch raisings of 50 cents or more.
Jerry’s innovation is merely a string-stretching tool 12 inches
in length that has a tip with a semi-circular groove wide
enough to accept up to .060” diameter piano wire. After
pitch raising, a “kink” or bend in the wire that was created by
being in contact with the top bridge pin is pulled upward
and becomes a small part of the speaking length. By applying
pressure against the string, the “kink” or bend is removed
eliminating the false beat.
The suppressor’s narrow width allows it to be inserted
between the hammers and pass around the damper wires. In
the “up” position, the grooved tip can slide up and down the
string to find the most effective spot to apply pressure.
No. 101 -
False Beat Suppressor. Each
This support jack set is used for supporting the pin block in
grand pianos while driving in new tuning pins. Included in
the set are two (6” long x 3” wide x 1” high) maple blocks
and a durable steel jack screw with two steel cylinders for
use in height adjustment.
No. 800 -
Pin Block Support Jack. Each
An accurate way to measure variations of
down bearing along the bridges. Precise
adjustment of the plate can be made to
insure maximum response. Negative or
positive bearing is indicated. Guesswork is
eliminated. A precision tool.
No. 3138 -
Downbearing Gauge. Each
A handy item for the restringing technician that gives a fast,
accurate and visual demonstration of bridge bearing to your
customer. Simply place the middle prong of the gauge on the
string between the bridge pins. Align the end prongs over the
same string and observe the amount of “rock” that occurs. If the
gauge cannot be “rocked” on either side of the bridge, then a
negative bearing situation is in effect and should be corrected.
Gauge is solid brass and measures 1-1/2” wide x 3-3/4” long.
No. 106 -
Bearing Check Gauge. Each
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