Shock absorber for quartz crystals
AssigneeMotorola, Inc.
InventorsCharles W. Mooney, Robert E. Phipps, William J. Kuznicki
Life of this patent
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Abstract
A shock absorbing insert for protecting a fragile quartz crystal includes a Teflon carrier with sloping walls which carries a number of dimple or rib shaped springs. These springs have varying spring rates increasing as they get farther from the base. The carrier is supported by a cushion spring system having a lower spring rate than that of the dimple or rib springs. This structure allows the force of mechanical shock to be distributed across the entire surface of the crystal rather than being concentrated at isolated areas of high stress.
Claims13
A shock absorbing insert for protection of a planar crystal device against impact with a crystal enclosure wall, said crystal device having opposed major surfaces and an edge, said shock absorbing insert comprising:
- first springing means having a first spring rate associated therewith;
- carrier means for holding said first springing means between one of said major surfaces and said enclosure wall so that said first springing means will contact one of said major surfaces when said crystal device is shocked by a force exceeding a predetermined magnitude in a direction toward said first springing means and substantially perpendicular to said opposed major surfaces;
- a spring cushion disposed between and mechanically coupling said carrier means and said enclosure wall, said spring cushion having a spring rate associated therewith which is less than said first spring rate.
Dependencies are inferred from the claim text.