Subscription TV (Sep, 1953)

Yay for early DRM. How long do you think it would have been before some Norwegian kid built themselves a Descrambling Card Simulation System (DeCSS) and gave the plans to all of their friends so they could view scrambled broadcasts on their non compatible European TVs?

Subscription TV
WOULD you like to see the opera, ballet, latest sports events, movies and Broadway plays on TV, sans commercials? If the FCC okays Skiatron, by merely inserting special program cards in a decoder unit attached to your set, you’ll view special programs at nominal fees.

William Gray’s Pay Telephone (Apr, 1953)

William Gray’s Pay Telephone

By Alfred Lief

THE young wife of a machinist in Hartford, Conn., fell critically ill. The year was 1888. There were few telephones in town and William Gray had to call a doctor. He ran to a nearby factory and asked permission to use their phone. The manager said no; it was not for public use. But his pleading won consent, the doctor arrived in time and Mrs. Gray survived.



Newest type of helical-scan video tape machine has been colorized


RECORDING COLOR TELEVISION SIGNALS on magnetic tape has been practical since 1958 when the first compatible color broadcast recorders went into service. These transverse studio machines use four heads which rotate at right angles to tape travel (see Fig. 1). The machines also contain very complex circuitry and time-base correction devices. The circuits are necessary to achieve studio-quality NTSC playbacks that meet FCC specifications for on-the-air transmission; such VTR’s (video tape recorders) range in price from $40,000 to $100,000.

Radio Equipment for Autos Brings Broadcast Programs to Motorists (Sep, 1930)

Three batteries, just for the radio?

Radio Equipment for Autos Brings Broadcast Programs to Motorists

RADIO, it seems, is destined to be installed in everything that flies, runs on wheels, or floats on water. The fast moving auto is the latest vehicle to be invaded by radio’s onward march.

Equipment has recently been placed on the market for installation in automobiles. As shown in the photo below, the control dials are installed on the dashboard, while the apparatus occupies a small space up under the cowl. The location of the loud speaker is optional, the space under the cowl being preferable. The antenna is ordinarily strung up in the roof, but many cars are equipped with built-in and invisible antennas, especially in the de luxe models of expensive makes.

Brain Waves Are Measured with Radio Amplifier (Dec, 1936)

Brain Waves Are Measured with Radio Amplifier

With an ordinary radio set for an amplifier, a young scientist at London is measuring brain waves. A fairly regular electrical wave emanates from the human brain during normal thought, but the waves diminish during sleep. The intensity of the waves is measured on an electric meter, enabling research men to study the relative intensity of thought processes.

Plastic Football Helmets (Sep, 1946)

Plastic Football Helmets. Only half as heavy as the familiar leather-and-fiber helmets, these headgear are weather resistant and have as much or more protective strength. Made by MacGregor-Gold-smith, of Cincinnati, they are molded in one unit from phenolic laminated material.

Pushbuttons replace dials on telephone (Apr, 1964)

Pushbuttons replace dials on telephone

Tests in regular service last winter at Carnegie and Greensburg, Pa., suburbs of Pittsburgh, have shown it’s easier and more than twice as fast to press buttons for a phone call than it is to twirl a dial. As each “touch-tone” button is pushed, it sounds a pleasing musical tone.

Bell is introducing the phone area by area, will nave it in general use within the next 10 years.

Outboard Starter Rewinds Itself (Aug, 1931)

Outboard Starter Rewinds Itself

A NEW starter for outboard motors makes obsolete the rope starter heretofore used. A steel tape, which automatically winds itself into the container in readiness for the next pull as soon as it is released is the feature of this device.

Boating enthusiasts who have had difficulty in finding their starting ropes—who have lost their ropes upon the sudden kick-back of a motor—whose wives have protested when the knot of a suddenly released rope snapped back over their heads—who resented picking up grimy, oil-soaked ropes—who have wasted time winding the rope around the starting plate—all have hailed this development as the greatest boon to outboard motoring since the development of the tilting propeller years ago.

Public Key Cryptography (Jan, 1983)

Public Key Cryptography

An introduction to a powerful cryptographic system for use on microcomputers.

John Smith
21505 Evalyn Ave.
Torrance, CA 90503

Cryptography, the art of concealing the meaning of messages, has been practiced for at least 3000 years. In the past few centuries, it has become an indispensable tool in the military affairs, diplomacy, and commerce of most major nations. During that time there have been many innovations, and cryptography has changed and grown to accommodate the increasingly complex needs of its users. Present techniques are very sophisticated and provide excellent message protection. Current developments in computer technology and information theory, however, are on the verge of revolutionizing cryptography. New kinds of cryptographic systems are emerging that have incredible properties, which appear to eliminate completely some problems that have plagued cryptography users for centuries. One of these new systems is public key cryptography.

Waterproof Sand Exhibited (Mar, 1938)

Waterproof Sand Exhibited

W/ATERPROOF sand constituted one of the many marvels of modern chemistry exhibited at a Chemical Industries Exposition recently staged in New York, N. Y. In a convincing test demonstration, water was passed through a series of curves in the chemically treated sand without becoming even partially absorbed.