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Shock Testing Fixture

IP.com Disclosure Number: IPCOM000084112D
Original Publication Date: 1975-Sep-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Ermak, S: AUTHOR [+3]

Abstract

A cushion shock testing fixture includes an upper plate member 10 and a lower plate member 11, to which four steel rods 12 are connected at their ends. A test box 13 has an upper wall 14, a lower wall 15 and a series of four side walls 16, in one of which an opening 17 is provided for mounting an accelerometer. The test box 13 is a unitary structure that may move along the rods 12.

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Shock Testing Fixture

A cushion shock testing fixture includes an upper plate member 10 and a lower plate member 11, to which four steel rods 12 are connected at their ends. A test box 13 has an upper wall 14, a lower wall 15 and a series of four side walls 16, in one of which an opening 17 is provided for mounting an accelerometer. The test box 13 is a unitary structure that may move along the rods 12.

A load simulator or clamping member 19 is mounted at the ends of four threaded rods 20 which are, respectively, received in bores in upper plate member 10 and retained by nuts located at both top and bottom surfaces of such member, to permit such clamping member to be moved toward or away from the box member upper wall 14.

In operation, cushion material to be evaluated is placed between lower plate member 11 and lower wall 15 and also between upper wall 14 and clamping member 19. The test box 13 is weighted to simulate the mass of a packaged article and the clamping member 19 lowered to contact the adjoining cushion material. This action causes the two layers of cushion material and the test box 13 to be held captive between lower plate member 11 and clamping member 19, to emulate an article packaged in the cushion material.

Lower plate 11 may be secured to the bed of a shock table or may be the bed of such shock table. The table is allowed to drop a selected vertical distance in a direction aligned with rods 12, and the difference between the readings of an accel...