Richardson's handbook of projection (1930)

Record Details:

Title:
Richardson's handbook of projection
Date:
1930
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
00099
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
March 28, 2024
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MANAGERS AND PROJECTIONISTS 1023 each other has the effect of altering the capacity of the condenser. That is why moving the knob attached to your radio condenser or condensers enables you to "tune in" on various stations having different wave length or K. C. frequency. You thus alter the capacity of the condenser by changing the relation of the plates to each other until it will permit the current frequency of the desired station to pass. That, gentlemen, is about as clear as I feel able to make the action of condensers. Some may wonder why the name condenser is applied to the instrument described, since there really is nothing "condensed." The answer is that when condensers were first evolved, in the early days of the science of electricity, it was believed the energy used in charging the plates had been in some manner condensed upon their surfaces. Others may ask if it would not be possible to use condensers to store up power. The answer is no, because a condenser capable of supplying any large amount of power would have to be of literally enormous size and weight. Such an instrument could, of course, be constructed, but due to excessive weight, size and expense, it would be entirely impractical.