Accession Number : AD0700271

Title :   A GRAVITY CORER RELEASE MECHANISM: DESIGN AND TESTING.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Van Brackle,Vernon Lamar , Jr

Report Date : OCT 1969

Pagination or Media Count : 63

Abstract : The corer release mechanism is a device which serves as the vehicle that permits free-fall coring. Analysis of existing release mechanisms has led to design of a versatile device which employs an upper lever arm safety that enables it to be armed after the corer has passed below the water surface. A quick-acting wire clamp is also included to assist in recovery procedures. The gravity corer operational tests that have been made provide a means of comparison when the device is and is not used. Variable free-fall heights were used with five different gravity corers and for four of the tested corers; best results were attained with a free-fall setting of five to seven feet. (author)

Descriptors :   (*OCEAN BOTTOM SAMPLING, SUSPENSION DEVICES), (*RELEASE MECHANISMS, DESIGN), MECHANICAL CABLES, COUPLINGS, LOCKING FASTENER DEVICES, SAFETY DEVICES, DROP TESTS, PERFORMANCE(ENGINEERING), THESES

Subject Categories : Physical and Dynamic Oceanography
      Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE