Richardson's handbook of projection (1927)

Page scan 000148 from Richardson's handbook of projection

Record Details:

Title:
Richardson's handbook of projection
Date:
1927
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
000148
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:
August 01, 2024
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598 HANDBOOK OF PROJECTION bX)R altered, whereupon the amount of current the primary coil takes from the lines is automatically increased or decreased until just sufficient is taken to maintain the balance between the magnetic fields. The action of a transformer, therefore, depends upon the balanced magnetizing action of its two coils. Roughly the foregoing describes the electro-magnetic action of all transformers. TWO TYPES. — There are two types of transformer, viz. : the straight transformer, in which there is no mechanical connection between the two coils, and the auto transformer, the wiring of which is illustrated in Fig. 199. The auto *=*l •*• o vwww AAAM Figure 199. Figure 200. transformer is an instrument having but one coil or winding, which serves for both the primary and the secondary coil. In Fig. 199, L is a laminated iron core on which the primary and secondary are wound in the form of one coil, or if you prefer it, two coils connected in series so that they practically form one coil. The primary wires are connected as shown, one to the terminal of the primary coil and the other to the terminal of the secondary coil at S. The secondary wires connect to one terminal of the secondary coil at T, and to the other terminal of the secondary coil at