Two new types of compasses

• Publisher: Elsevier Science
• Year: 1951
• Tongue: English
• Weight: 71 KB
• Volume: 252
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(51)90540-6

✦ Synopsis

Division of Bendix Aviation Corp., Baltimore 4, Md., has developed a tiny electronic amplifier for miniaturized airborne radar equipment. It is a band-pass type amplifier with a rated electrical gain of 130 db. Weighing less than 2 ounces and requiring only 35 component parts, its cost in large production quantities should be small enough to make feasible replacement of the entire amplifier in case of tube of component failure and because of its plug-in design replacement can be made in a matter of seconds.

Two new types of compasses developed by Army Engineer Research and Development Laboratory, Ft. Belvoir, Va., provide accurate readings in temperature range from minus 65 to 125 degrees F. A wrist compass only -ss" thick weighs less than 3 ounces, features osmium-alloy pivot and a sapphire jewel to reduce friction, polyethylene molded cover to hide visible light rays from luminous parts. The larger size lensatic compass, with luminous marks and indicator, permits nighttime azimuth readings with error of less than 2 degrees arc, is about two inches square and weighs only four ounces. Both types are in use in Korea.