Looking Back

Aug. 7, 2008
Tough plastics make combo screwdriver better: Four-in-one screwdrivers have a reputation for being heavy, difficult to grip, and expensive to make.

AUGUST 6, 1998

Allway Tools, Bronx, N.Y., has designed a screwdriver that remedies these shortcomings. Black Celanese 1503 from Ticona, Summit, N.J., is used for the one-piece handle shank. The 33% glass-reinforced plastic resists creep, has a service temperature of 250°F, and gives the handle a comfortable friction element for a sure grip, even when wet. The yellow cap and finger shank are 14% glass-fiber-reinforced Celanese nylon 6420, which provides impact resistance and spring resilience. The plastic fingers in the bit-storage pockets are designed so they are relaxed when the bit is in place, and deflect only when bits are inserted or removed.

AUGUST 10, 1978

Wind turbine extracts 30% more energy: A unique horizontal windturbine concept is said to extract 30% more energy from the wind than conventional types. Developed in their free time by Leo A. Hein and W. Neill Myers, engineers at Marshall Space Flight Center, the system could be located on top of a chimney to accept not only wind from any direction but also chimney updraft, which could be then fed to solar collectors. The turbine would also be less susceptible to wind damage. The sketch depicts the concept being used in a solar farm.

AUGUST 17, 1958

Pocket-sized record player has no turntable and its tone arm is part of the lid. It plays any size 331/3 and 45-rpm record, is battery powered, and selfcontained with low-drain motor, transistorized amplifier, and loudspeaker. In spite of eventual battery rundown, a governor maintains constant record speed. Two rubbertipped shafts replace the usual turntable. The unit was developed by Camp Bird Ltd., London, England.3

Sponsored Recommendations

The entire spectrum of drive technology

June 5, 2024
Read exciting stories about all aspects of maxon drive technology in our magazine.


May 15, 2024
Production equipment is expensive and needs to be protected against input abnormalities such as voltage, current, frequency, and phase to stay online and in operation for the ...

Solenoid Valve Mechanics: Understanding Force Balance Equations

May 13, 2024
When evaluating a solenoid valve for a particular application, it is important to ensure that the valve can both remain in state and transition between its de-energized and fully...

Solenoid Valve Basics: What They Are, What They Do, and How They Work

May 13, 2024
A solenoid valve is an electromechanical device used to control the flow of a liquid or gas. It is comprised of two features: a solenoid and a valve. The solenoid is an electric...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!