Music Trade Review

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THE MUSIC TRADE REVIEW
Tracking Device
•
acker Bar in Combination
II Adjuster
When Roll isTrackin#
Correctly, Perforation
C b T k B O i
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fin
Old Style Tracker Bar.
When Roil is Tracking
Correctly, Perforation
^VCbvewTracker Bar Opening
Simplex Tracker Bar.
with
W h e n Trackingf
Incorrectly, Perforation
f V Miss eg the OpeninA*
m
Old Style Tracker Bar.
'When Tracking
1 n correctly. Perforation
VStill Covers Opening
Simplex Tracker Bar.
These diagrams explain why the Simplex Trapezoid Tracker
Bar solves tracking troubles.
Then examine the diagram of the Sim-
plex Roll Adjuster, which with unerring
sureness keeps the roll always absolutely
[centered, and always playing true. It
does so by taking advantage of the roll's
very imperfections.
No automatic tracking device of any
character whatsoever can accomplish
more than this automatic lining up of roll
center with bar center—or do so more
effectively than this Simplex device
does it.
Coupled with the Trapezoid Bar,
whose opening is wider than any
other 88 note bar and equals the old
65 note bar's generous one-sixth
inch opening, this device is beyond
question the most satisfactory
solution of faulty tracking.
The Simplex Trapezoid Tracker
Bar and Roll Adjuster represent
perfectly the Simplex point of view,
i.e., the solving of every player prob-
lem in the simplest possible way.
It is in line with the famous Simplex
Four-Piece Valve (ordinary valves contain
upwards of nineteen pieces). The Simplex
Unit Pneumatic—instantly removable or
interchangeable by loosening two screws.
The new sensitive Simplex Bellows Set;
the simplified Simplex Control; and the
other exclusive Simplex features.
The superiority of these Simplex inven-
tions is instantly apparent when you have
examined the Simplex Action in operation.
Write us today for full information.
CTION COMPANY
WORCESTER, MASS.