Method and apparatus for detecting free fall

• US 6,520,013 B1
• Filed: 10/02/2000
• Issued: 02/18/2003
• Est. Priority Date: 10/02/2000
• Status: Expired due to Term

• Current Assignee: Apple Inc.
• Original Assignee: Apple Computer Incorporated (Apple Inc.)
• Inventors: Wehrenberg, Paul James
• Primary Examiner(s): Williams, Hezron
• Assistant Examiner(s): SAINT SURIN, JACQUES M
• Application Number:
  US09/678,541
• Time in Patent Office: 869 Days
• Field of Search: 734/88, 734/89, 734/94, 734/96, 73/13.8, 360/75, 360/69, 360/105, 360/106
• US Class Current: 73/489
• CPC Class Codes: G11B 19/04 Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
• CPC Class Codes: G11B 19/08 by using devices external to the driving mechanisms, e.g. coin-freed switch coin actuated mechanisms G07F5/00
• CPC Class Codes: G11B 21/12 Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position otherwise than during transducing operation

Abstract

A data processing system including a data storage device having data stored on a data storage medium. Within said data processing system, a system electronics is operatively coupled to a sensor and to said data storage device. When the sensor senses a change in gravitational or inertial acceleration of said data processing system, it alerts system electronics to temporarily park a read/write head in a safe position.

Claims

1. A data processing system, comprising:

a data storage device having data stored on a data storage medium;

a read/write head operatively coupled with said data storage medium; and

an acceleration detector coupled to said read/write head, said detector detecting a change in an acceleration of said data processing system, wherein said detector includes a switch member having a first position and a second position and wherein the switch member is switched from the first position to the second position when the change in the acceleration is detected.

2. A data processing system as recited in claim 1 wherein said acceleration is gravitational or inertial.

3. A data processing system as recited in claim 2, wherein said detector causes said read/write head to be stably positioned in a safe location whenever a change in acceleration is detected.

4. A data processing system as recited in claim 3 wherein said safe location is one of a parked position off to a side of said data storage medium or a secured operating position that prevents vibration from damaging said read/write head or said data storage medium.

5. A data processing system as recited in claim 3 wherein said safe location is one of a parked position off to a side of said data storage medium or a secured operating position that prevents shock from damaging said read/write head or said data storage medium.

6. A data processing system as recited in claim 3 wherein said read/write head is removed from said data storage medium and locked in a safe position.

7. The data processing system as recited in claim 1, wherein the first position of the switch member is a closed position and the second position of the switch member is an open position.

8. The data processing system as recited in claim 7, wherein the switch member comprises:

a non-electrically conductive support material;

an electrically conductive tubular casing coupled to said support material; and

a beam having a first end and a second end, said first end supported by said support material.

9. The data processing system as recited in claim 8, wherein the second end of the beam contacts the casing when the switch member is in the first position and wherein the second end of the beam does not contact the casing when the switch member is in the second position.

10. A method for protecting a data storage device which is operatively coupled to a read/write head, comprising:

detecting a change in acceleration, said change being detected through a switch member having a first position and a second position, wherein said change causes the switch member to switch from the first position to the second position; and

positioning said read/write head in a safe position upon said detecting.

11. The method of claim 10 wherein said acceleration is gravitational.

12. The method of claim 10 wherein said acceleration is inertial.

13. The method as recited in claim 10, wherein the first position of the switch member is a closed position and the second position of the switch member is an open position.

14. The method as recited in claim 13, wherein the switch member comprises:

a non-electrically conductive support material;

an electrically conductive tubular casing coupled to said support material; and

a beam having a first end and a second end, said first end supported by said support material.

15. The method as recited in claim 14, wherein the second end of the beam contacts the casing when the switch member is in the first position and wherein the second end of the beam does not contact the casing when the switch member is in the second position.