AUXILIARY EQUIPMENT, SPINNER, POLARIZER BM-34 (A)

Changes in force: C 2, C 4, C 5, C 6 and C 7

TM 11-2323

C 7

PROJECTORS PH-637/PFP AND PH-637A/PFP; PROJECTORS,

STILL PICTURE PH-637B/PFP AND PH-637C/PFP; AND

SPINNER, POLARIZER BM-34(A)

HEADQUARTERS

Change

DEPARTMENT OF THE ARMY

No. 7

Washington, D.C., 4 December 1964

TM 11-2323, 7 April 1954, is changed as indicated to include Spinner,

Polarizer BM-34(A) procured on Order No. AF 33 (657) 13352.

Note. The parenthetical reference to a previous change (example: "page 1 of

C 6") indicates that pertinent material was published in that change.

Change the title as shown above.

Page 3, paragraph 2c (page 1 of C6), line 7. Delete the address

and substitute: Commanding General, U.S. ARMY Electronics Com-

mand, ATTN: AMSEL-MR-MA, Fort Monmouth, N.J. 07703.

Page 46. Delete chapter 4 and substitute:

CHAPTER

AUXILIARY EQUIPMENT, SPINNER, POLARIZER

BM-34(A)

48. Description and Data

a. Purpose. Spinner, Polarizer BM-34(A) (spinner) (fig. 23.2)

provides the projector with an animating capability.

b. Use. The spinner is used to animate transparencies on which a

special polarizing material has been preprinted or hand-set. The

spinner is specifically designed for mounting on the PH-637(*)/PFP

series projectors.

c. Technical Characteristics.

Operating power-------------------110 to 125 volts, 50 to 60 cps.

Current------------------------------0.15

ampere.

Polarizer rotation---------Continuously variable from 20 rpm to 180

rpm.

Motor speed---------------------3, 200 rpm (maximum)

Light transmission---------------38-40 percent of transmission light.

d. Description. Spinner, Polarizer BM-34(A) (fig.23.2) is a single,

self-contained, portable unit. The high-impact styrene spinner hous-

ing contains a motor, rotating polarizer, an on-off power switch, and

a variable speed control resistor to control the rotational speed of the

motor and the polarizer. A neon lamp indicates when power is applied

to the motor.

TAGO 763B