In the 051228 MMDigest, John Tuttle asked about motor starting current.
I have the bottom board from a Stoddard Ampico with the pump and motor
where I could get at it without too much trouble.

The pump is functional, but needs to be rebuilt.  The maximum vacuum
with the spill valve and all ports sealed is 74 inches of water.
The motor has been tested, cleaned and lubricated.  The windings were
checked for shorts to the frame and shorted turns.  The motor does not
appear to have been overhauled or rewound.

The bearings appear to be in good condition as shown by a lack of
excessive play, a long coasting time when power is removed and the
slight "roll back" upon stopping. The motor runs quietly with no
significant vibration.

The motor name plate has the data below:

Alternating Current Motor, Continuous Duty,
Made Expressly For American Piano Co., New York
Westinghouse Electric & Mfg. Co.
Style 71A69B,  Serial Number 2739928
1/12 HP, 1140 RPM, 1.9 Amperes, 110 Volts, 60 Cycles, 1 Phase

Testing at line voltage: 121 volts 60 Hz

The starting current is the same for all load conditions:

  18.5 amperes, average across 50 milliseconds
  16.1 amperes, average across 100 milliseconds

The motor was operated under three different load conditions and
recorded the following line current and power consumption data:

    condition         current   power
                      amperes   watts

1. no load (no belt)  1.99       58.5
2. pump 20" suction   2.19      148.2
3. pump 74" suction   2.54      192.1

I put the full data at  http://player.wpjohnson.net/index.html

Wayne Johnson
Northern California

 [ Thanks, Wayne, I'll add your measured data at
 [ http://mmd.foxtail.com/Tech/Motors/index.html
 [ -- Robbie