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| ANDERSON POWER PRODUCTS |
| INDUSTRIAL USE |
| NAVY/MARINE USE |
| SKI LIFT USE |
DYNALEC SOUND-POWERED TELEPHONE SYSTEM
HOW IT WORKS
The speaker's voice supplies necessary power for operating Sound-Powered Telephones; batteries or power connections are not required.
The voice causes fluctuations in the magnetic circuit of the transmitter and creates an alternating current. This current, too small to be measured by ordinary instruments, travels to the receiver where sound waves are created and reproduce the speaker's voice.
Reliable communications are never interrupted by a power failure.
Speech is transmitted clearly and distinctly, because all static noise associated with battery type telephones is eliminated. When conditions are normal, satisfactory transmission for 30 miles, or more, is assured.
This equipment is designed to answer the demands for reliable shipboard communications, under the most adverse conditions, for the U.S. Navy. The system includes a broad range of devices to meet a variety of applications. It is ideal for use in airport, fire and police rescue crews, public utilities, schools, vaults, refrigeration plants, mining operations, ski lifts, and civil defense.
Where outside power is not available, sound-powered telephones provide communication for bridge construction, diving projects and geophysical operations. Also, sound-powered telephones are used in isolated areas such as oil fields, parks, forests and salvage yards.
Sound-powered telephone systems offer clear transmission for accurate and understood communication in high-noise locations such as foundries, heavy manufacturing plants, shipping docks, sports arenas and road building projects.
Sound-powered telephone equipment is explosion-proof, making it ideal for arsenals and powder works, gas plants, chemical plants, oil refineries, mines and quarries and nuclear installations.