Figure 1. Mechanical Cream Whipper and Wattmeter. 

 (Gem kitchen mechanic whipper manufactured by Gem Appliances, Inc., 280 Madison 

 Ave., N. Y., and a Westinghouse type PY5 portable single phase wattmeter. 



With this apparatus it is possible to obtain a record of the stiffness of the 

 cream throughout the whipping process by recording the input of the motor in 

 watts at intervals of ten seconds, or less if desired. The smallest scale division 

 on the wattmeter is 5 watts, but 2.5 watts can be readily estimated. The 

 whipper-motor, of which the input is charted, is a split-phase motor rated H 

 h.p. and 1725 r.p.m. This motor produces in the whipper proper two distinct 

 kinds of rotation. First it spins the whipper on its vertical axis counter clock- 

 wise at a speed of 570 r.p.m. Second, it moves the spinning whipper (and its 

 axis) clockwise about the inner periphery of the bowl so that the whipper com- 

 pletes 78 circuits about the bowl each minute. This motion prevents the 

 whipped cream from clinging to the sides of the bowl and leaving the whipper 

 relatively free. 





