Improvements in Motors used in Mechanical Musical Instruments.
Year: 1897

page_text: Date of Application, 27th May, 1897-Accepted, 10th July, 1897 :
COMPLETE SPECIFICATION.
Improvements in Motors used in Mechanical Musical Instruments.
ALFRED MAXFIELD Mechanical Musical Instrument Manufacturer 326 Liverpool Road
London, N. do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention relates to an improved motor actuated by air pressure, and used in
that class of mechanical musical instrument whose sound producing devices are
controlled by travelling perforated sheets, bands or cards.
Hitherto the motors used for operating the music sheets or bands have been
lacking in power and sensitiveness, in my improved motor by introducing small
pneumatic levers for opening the inner ports, as hereinafter described, the power is
greatly increased.
The accompanying drawing is an end view of the improved motor.
I provide a series of not less than four collapsible bellows A, ranged on the one side
of hollow chest B, C is a channel communicating with the suction bellows of the
instrument. I pivot to the reciprocating part of bellows A, one part of the
pitmen D, the other end of pitmen is pivoted to crank shaft E, this crank shaft is
journalled in bearings G. Secured to the crank shaft E, are small cams F, F, these
cams are for raising the pallets H, which cover ports N. Each of the bellows A,
have connected therewith, two cams F, two pallets H, and two ports N, which
operate alternately. One of the ports N, allows the air to pass into bellows A, for.
refilling, and the other port is in direct communication with a small pneumatic lever I,
thus when the pallet H, is raised by the action of cam F, the air rushes down port N,
and by the combined action of the inrush of air and the suction prevailing in
hollow chest B, the lever I, is distended, the end of which comes in contact with
projecting pin J, this pin is secured in pallet M, inside bellows A, and when
depressed by lever I, opens port O, allowing the air to be exhausted from bellows A, which
immediately collapse through the outer pressure of air. This action partly revolves
the crank shaft E, and by the alternate action of the other bellows A, the shaft E, is
revolved. A small spring P, is provided to return the pallet M, to its seat over
port O.
The motor is started, stopped or the speed regulated by sliding the valve R, over
the suction channel C.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what I
claim is.
1. In combination with a motor, for operating the perforated travelling
sheets, bands or cards to be used in mechanical musical instruments whose sound
producing devices are controlled by the said perforated sheets, bands or cards, the use
of small pneumatic levers or bellows for the purpose of opening the inner ports as
herein described.

page_text: 2. In combination with a motor, for the purpose specified, bellows A, pitmen D,
crank shaft E, cams F, bearings G, pallets H and M, pneumatic lever I, pin J,
spring P, and valve R as herein described and for the purpose specified.
Dated this 27th day of May 1897
-
ALFRED MAXWELL.