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MMD > Archives > March 2013 > 2013.03.22 > 02Prev  Next


Seeburg L Motor Power
By Robbie Rhodes

I believe Seeburg installed the same split phase electric motor in
every instrument they built, from small to large, simply because the
difference in cost is negligible between a 1/12 horsepower (hp)
motor and a 1/6 hp motor.  Notice the small variation of weight --
26 to 29 pounds (11.8 to 13.2 kilogram) -- in the player piano motors
listed at http://www.mmdigest.com/Gallery/Tech/Motors/index.html 

The Seeburg style "L" cabinet nickelodeon of the 1920s contains
only a pneumatic piano and a music roll transport; it does not have
organ pipes or a xylophone, so it consumes the least motor power of
the Seeburg instruments.  Even though the motor label might say 1/8
horsepower, the power consumed is probably much less.

Craig Smith measured the power consumption of the motor in his
Seeburg KT.  The label says the motor is 1/8 horsepower, Emerson
type 7310DL, 110 vac 60 Hz, made especially for Seeburg.  The
starting power exceeds 1000 watts, he reports.  The no-load power
(belt dismounted) is 100 watts.  The power consumed during normal
operation is 140 watts.  Assuming 67% efficiency, the shaft power
drawn by the Seeburg KT is therefore 94 watts, or 1/8 horsepower.

In my opinion, the best method to set up a motor and pulley
installation is to measure the power consumed by the motor during
normal operation, and adjust both the motor voltage and the pulley
diameter to realize the lowest power consumption (watts).  Then the
heating and temperature rise is also minimum.

I suggest that you speak with an expert refrigerator repairman.
He will have a low-power wattmeter that is suitable to measure the
power consumed by a fractional-horsepower motor such as in a player
piano or nickelodeon.

Robbie Rhodes


(Message sent Fri 22 Mar 2013, 09:12:38 GMT, from time zone GMT-0800.)

Key Words in Subject:  L, Motor, Power, Seeburg

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