Music Trade Review

Music Trade Review -- © mbsi.org, arcade-museum.com -- digitized with support from namm.org
THE MUSIC TRADE REVIEW
AUTOMATIC
The Tracking Device Without a Flaw
SIMPLE CONSTRUCTION
INSTANTANEOUS OPERATION
ACCURATE REGISTRATION
MICROMETRIC ADJUSTMENT
IDEAL FOR ALL MAKES OF MUSIC ROLLS
Technically Speaking:—A continuous suction is maintained
within the bellows and the force of this suction is merely varied
more or less as the necessity for adjustment is greater or less, thus
maintaining in fact a continuous current of air with an undulating
pressure or suction for effecting the desired adjustments. By this
means an extremely nice regulation is secured, the slightest de-
parture from the normal position causing a corresponding increase
or decrease in the pressure sufficient to correct the error. The
adjustments and readjustments are always very slight and the sheet
is held very closely to its normal position at all times. In fact
scarcely any movement of the tracker bar can be seen. At the same
time this continuous system permits of an extreme simplification
of the apparatus, and the pneumatic connections are reduced to
the simplest possible constructions.
American Player Action Co.
2595 Third Avenue
New York City