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10
THE MUSIC TRADE REVIEW
PNEUMATICS
(Continued from page 9)
foration and the corresponding pneumatic let
there be a tube leading to a pouch under the pneu-
matic. Let the pneumatic be so arranged that
when this pouch rises it uncovers a suction pas-
sage which causes the pneumatic to collapse. Or,
contrariwise, let the pneumatic be under collapse
and let the function of the pouch be to bleed
atmospheric air into it, so that it may open up.
Since the function of the opening or closing is
alike to produce a movement upon a lever, either
system can, other things being equal, be utilized.
If now the tracker bar be covered by a sheet
of paper none of the pneumatics will operate and
the valve will hang at whatever position is de-
termined for its normal. Suppose now that the
marginal perforation which corresponds with No.
1 pneumatic, nearest to the fulcrum, be opened
by the registration with it of a perforation in the
paper. The pouch will rise, the pneumatic will
open or close (as the case may be) and the ful-
crumed lever will be moved accordingly, raising
the valve somewhat further from the hole than
its normal or minimum power position.
If, again, No. 2 pneumatic were operated this
pneumatic would pull up the lever a little fur-
ther, for it exerts more leverage on account of its
position. And so on with the others.
Obviously, by combining the perforations two,
three or four pneumatics can be operated simul-
taneously, producing more sudden changes.
Again, when it is necessary to reverse the oper-
ation similar pneumatics could be devised to pull
back in the opposite direction. Or, failing this,
it might be arranged that as soon as a marginal
perforation had passed over the valve should drop
back to its minimum position, which would, of
course, always happen if the valve were balanced
in the manner suggested.
Another plan could be thought out equally well.
The passageway between action and bellows
might be built at one place in the form of a hori-
zontal channel roofed over. The air from the
action might be brought up under the floor of
this passage, in which would be a number of holes
in various sizes, all but one closed bv valves.
The Player That Wins by
DEMONSTRATION
Is the Player That Wins in
COMPETITION
By sheer force of merit, by its power to c o n v i n c e
in the only effective manner: i.e., by demonstration—
M. Schulz Co. Player-Piano
is enabled to win—and continually does win—against
the most formidable c o m p e t i t i o n .
It wins in
demonstrations because it is demonstrably
The Easiest to Play
The Simplest
The Most Responsive
The Least Mechanical in Effect
The Most Durable Under Use
Piano merchants who have this sales weapon
need fear no competition.
They may have
to fight, but they
are sure
to win.
Interesting and pertinent facts and particulars from
APRIL 29, 1922
The one always open hole would be the smallest.
Then the air from the action would come up under
the floor, pass through any one or more of these
holes that might be open and go out through an-
other hole at the end of the channel into the bel-
lows. If the air could pass only through the one
smallest hole the minimum power would alone
be in operation. If this hole and one more were
open together the quantity of air passing through
would be that much greater. If three holes were
open the power realized would be proportionately
greater, and so on. The cutting off of power
would be done, of course, by closing holes, one
or more at a time.
The reader will have observed that these con-
siderations only relate to the bare mechanical
problems involved. But in the mechanism of
piano playing by means of the pneumatic the
mechanism itself can only work effectively when
the system of control is itself effective. Every-
thing, in a word, as to result, depends upon how
the expression perforations are placed. This de-
pends upon the editor, whose duties are, there-
fore, seen to be of essential importance.
The reader will perceive for himself that many
other methods besides those we have described
might be put into operation for the purposes set
forth. We have made no attempt to describe
closely any existing action, nor to do more than
point out the lines of approach which all inventors
have had somehow to follow. In later articles it
will be interesting to trace out the higher refine-
ments of the idea of automatic expression, in
order that the technical reader may see how these
can be taken up, worked out and perfected. Such
refinements have to do with passage from one
power to another, with attainment of slow cre-
scendo and diminuendo, with sudden accent, with
sforzando, etc.
AMPICO MUSICJWEEK PROGRAM
Noonday Recitals and Special Musicales at the
Ampico Studios Announced in Addition to
Showing of the Film "Immortalized"
In addition to the showing of the film
"Immortalized" at Carnegie Hall on the after-
noon of May 4, with Leo Ornstein as soloist,
and with an orchestra of eighty under the
direction of Hugo Riesenfeld, as already an-
nounced, the American Piano Co. has arranged
for a series of daily noonday recitals at the
Ampico Studios, 437 Fifth avenue, New York,
and also a number of matinee musicales and
evening recitals at the Ampico studios as part of
its contribution to the Music Week program.
The schedule for the regularly arranged
musicales at the studios is as follows:
May 1—Matinee musicale, 3.30 p. m. Miss
Rosemary Pfaff, soprano; Miss Helen Jeffrey,
violinist; Mr. John Duke, pianist, and Mr. Alvin
Belden, dancer.
May 2—Matinee musicale, 3.30 p. m. Mrs.
Adele Parkhurst, soprano; Mrs. Milton Gold-
smith, diseuse; Mr. Alvin Belden, dancer, and
Mr. Juan Reyes, pianist.
May 3—Matinee musicale, 3.30 p. m. Madame
Rust-Mellor, soprano; Mr. Richard Barth,-
pianist, and Mr. Alvin Belden, dancer.
May 4—8.30 p. m. Song recital by Mr.
George Reimherr.
May 5—Matinee musicale, 3.30 p. m. Miss
Louise Stallings, soprano; Miss Vera Barstow,
violinist, and Mr. Earle Laros, pianist.
May 6—Children's musicale, 10.30 a. m. Sally
Hamlin, child entertainer; Dorothy
Hart,
dancer, and Alvin Belden, dancer.
MISS ALLISON JOINS BARTLETT CO.
M. SCHULZ
Founded 1869
General Offices
Schulz Building
711 Milwaukee Ave.
CHICAGO
CO.
Southern Wholesale Branch
1530 Candler BIdg.
ATLANTA, GA.
Miss Helen Allison, formerly associated with
the Byron Mauzy store in San Francisco, Cal.
is now connected with the Bartlett Music Co.,
Los Angeles, where she is engaged in giving
special demonstrations of Q R S-Art Echo rolls.
The Cushman Music House, of Maysville, Mo.,
has opened a branch in Conception Junction, Mo.,
under the management of R. Merrigan.