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Page 38
Projection Engineering, May, 1930
ELLIS MICROPHONES
and Accessories
Used all over the world and rendering the highest type of satisfaction. Furnished in two models at $45.00 list and $75.00 list. Special designs for broadcast studio and for public address use. Write for descriptive literature and discounts stating name of your jobber.
ELLIS ELECTRICAL LABCEATCEy
Sales Corporation
341 W. MADISON STREET, CHICAGO, IEE.
M
[txer Controls,
Constant Impedance Faders, Volume
Controls and Transformers for Speech
Input and associated equipment.
Write for Bulletins K1-K2-L1 and Ml describing this apparatus
D'Arcy Laboratories
205 West Wacker Drive Chicago, Illinois
w
E offer to manufacturers interested in
EXPORT
the services of a dependable organization* well established in the entire foreign field
AD. AUMEMA, Inc.
Manufacturers' Export Managers
116 Broad Street, New York, N.Y.
y\
"VISITRON " 3
Photoelectric Cells
Standard with the majority of manufacturers of Sound on Film Equipment.
There's A Reason
LABORATORIES
1802 Grace St.
Chicago, U. S. A.
OCALITE
SouimdL ScFeein
Vocalite combines a distinct clear transmission of sound with sharp brilliant pictures. It enables better projection because of its mechanical, scientific and optical features, the result of painstaking study on the part of the laboratory staff of the Beaded Screen Co.
It is 100% Perfect for Light, Sound, Color and Third Dimension
Descriptive Literature on Application
BEADED SCREEN CORP
448 WeST 3 7™STRf€T N.Y.
MICROPHONES
AND
AMPLIFIERS
AC Operated Speech Input.
Public Address.
Mixing Panels.
Power Supply Panels and Racks.
Recording Amplifiers.
ELECTRO ACOUSTIC PRODUCTS CO., 55 East Wacker Drive, Chicago.
INDEX TO ADVERTISERS
Aerovox Wireless Corp 34
Ad. Auriema, Inc 38
Amrad Corp., The 3
B
Beaded Screen Corp
Blue Seal Products Co., Inc.. . .
38 5
Cameron Publishing Co., Inc 39
Celotex Co., The 6
Clarostat Mfg. Co Fourth Cover
D
D'Arcy Laboratories
De Jur — Amsco Corp
38 33
E Eisler Electric Corp..
35
Electro Acoustic Products Co. Ellis Electrical Laboratory . .
38 38
G
G-M Laboratories, Inc 38
General Insulating & Mfg. Co.
Second Cover
General Radio Co 32
Gjalde Mfg. Co., The 34
H
Hewes-Gotham Co 31
I
International Resistance Co 34
J
Jenkins & Adair, Inc 35
N National Carbon Co., Inc 40
Papini, Anthony 32
Pitman & Sons, Isaac 37
Polymet Mfg. Corp 39
R
Racon Electric Co., Inc 33
RCA Institutes, Inc 40
Samson Electric Co 1
Silver-Marshall, Inc Third Cover
Stevens, Eugene E 37
Strong Electric Co., The 34
Superior Resistor Corp 35
Thordarson Elec.
T
Mfg U
Co.
29
Universal Microphone Co 37