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SEPTEMBER, 1931
Page 31
T
X HE Group Subscription Plan for Projection Engineering enables a group of engineers, executives, projectionists or technicians to subscribe at one-half the yearly rate. ,
The regular individual rate is $2.00 a year. In groups of 4 or more the subscription rate is $1.00 a year. (In Canada and foreign countries $2.00.)
The engineering departments of hundreds of manufacturers and scores of the M. P. M. O. U. locals in the projection and allied industries have used this Group Plan extensively, in renewing their subscriptions to Projection Engineering.
Each subscriber should print his name and address clearly and state his occupation — whether an executive, engineer, department head, contractor, installation man, projectionist or technician, etc.
Remember this Group Plan when Your Subscription Expires
(Projection Engineering)
Bryan Davis Publishing Co., Inc.
52 Vanderbilt Ave.,
N. Y., N. Y.
Los Angeles Chicago Cleveland
Type P-5
Graphite Element Volume Control adapted for use as a Pentode Tone Control Rheostat.
PENTODE
TONE CONTROLS
A DDING Tone Control to Pentode circuit has presented new problems to volume control engineers because of the heavy load to be dissipated by this light duty device. A special tapered element designed to spread this load and at the same time gradually control the tone was necessary.
CLAROSTAT, as usual, has solved this problem for manufacturers, and now a really worthwhile, efficient Tone Control rheostat is available.
Present your variable resistor problems to Clarostat Engineers.
CLAROSTAT MFG. CO., Inc.
285 NORTH SIXTH ST.
BROOKLYN, N. Y.
Type P-18
Wire Wound Volume Control with builtin switch.