Device and method for testing acceleration shock sensors

Claim 2

A shock sensor comprising: (a) a housing; (b) a magnet slidably mounted on the housing for travel; (c) a reed switch mounted on the housing to be responsive to the position of the magnet such that the switch is activated when the magnet travels to a pre-selected activation position during movement of the magnet in response to an acceleration force applied to the housing; and (d) an electromagnetic coil positioned to provide a magnetic field that urges the magnet to travel to the pre-selected activation position in a manner that emulates the acceleration of the magnet induced by rapid deceleration of the shock sensor to confirm the operation of the shock sensor, the electromagnetic coil being located on the housing at a position distant enough from the reed switch such that the reed switch will not be directly activated by energizing the coil.

Claim 3

The shock sensor of claim 1 further comprising leads to the electromagnetic coil and wherein the magnetic field of the electromagnetic coil is variable by changing the coil current pulse by application of different trigger voltages through the leads.

Claim 4

The shock sensor of claim 1 wherein the electromagnetic coil is a spool having two ends and windings wound circumferentially about the spool, and wherein one end of the spool is positioned perpendicular to the travel of the magnet.

Claim 5

The shock sensor of claim 1 wherein the magnetic field of the electromagnetic coil opposes the magnet.

Claim 6

The shock sensor of claim 1 wherein the magnet is a tubular magnet slidably mounted on the housing so as to surround the reed switch at the pre-selected position.

Claim 7

A testing device for a shock sensor of the type that includes a housing and a magnet slidably mounted on the housing for travel, and a reed switch mounted on the housing to be responsive to the position of the magnet such that the switch is activated when the magnet travels to a pre-selected position during movement of the magnet in response to an acceleration force applied to the housing, the testing device comprising an electromagnetic coil positioned to provide a magnetic field that opposes the magnet such that the magnet is urged to travel to the pre-selected position in a manner that emulates the acceleration of the magnet induced by rapid deceleration of the shock sensor to test the operation of the shock sensor, the electromagnetic coil being located on the housing at a position distant enough from the reed switch such that the reed switch will not be directly activated by energizing the coil.

Claim 8

A testing device for a shock sensor of the type that includes a housing and a magnet slidably mounted on the housing for travel, and a reed switch mounted on the housing to be responsive to the position of the magnet such that the switch is activated when the magnet travels to a pre-selected position during movement of the magnet in response to an acceleration force applied to the housing, the testing device comprising an electromagnetic coil positioned to provide a magnetic field that opposes the magnet such that the magnet is urged to travel to the pre-selected position in a manner that emulates the acceleration of the magnet induced by rapid deceleration of the shock sensor to test the operation of the shock sensor, the electromagnetic coil being located on the housing at a position distant enough from the reed switch such that the reed switch will not be directly activated by energizing the coil.

Claim 9

The testing device of claim 6 further comprising leads to the electromagnetic coil and wherein the magnetic field of the electromagnetic coil is variable by changing the coil current pulse by application of different trigger voltages through the leads.

Claim 10

The testing device of claim 6 wherein the electromagnetic coil is a spool having two ends and windings wound circumferentially about the spool, and wherein one end of the spool is positioned perpendicular to the travel of the magnet.

Claim 11

The testing device of claim 6 wherein the magnetic field of the electromagnetic coil opposes the magnet.

Claim 12

A shock sensor comprising: (a) a housing having a first abutment; (b) a second abutment of the housing spaced apart from the first abutment a fixed distance; (c) a magnet having a first end and a second end, the magnet being slidably mounted on the housing to travel between the first abutment and the second abutment and oriented so that the first end of the magnet faces the first abutment and the second end of the magnet faces the second abutment; (d) means for biasing positioned between the magnet and the second abutment, the magnet being biased away from the second abutment by the biasing means until such time as the magnet is subjected to an acceleration force of pre-selected magnitude; (e) reed switch mounted on the housing to be responsive to the position of the magnet such that the switch is activated when the magnet reaches a pre-selected activation position during movement of the magnet in response to a pre-selected acceleration force applied to the housing; and (f) an electromagnetic coil positioned to provide a magnetic field that urges the magnet to travel between the first abutment and the second abutment in a manner that emulates the acceleration of the magnet induced by rapid deceleration of the shock sensor to test the operation of the shock sensor, the electromagnetic coil being located on the housing at a position distant enough from the reed switch that the reed switch is not directly activated by energizing the coil.

Claim 13

A shock sensor comprising: (a) a housing having a first abutment; (b) a second abutment of the housing spaced apart from the first abutment a fixed distance; (c) a magnet having a first end and a second end, the magnet being slidably mounted on the housing to travel between the first abutment and the second abutment and oriented so that the first end of the magnet faces the first abutment and the second end of the magnet faces the second abutment; (d) means for biasing positioned between the magnet and the second abutment, the magnet being biased away from the second abutment by the biasing means until such time as the magnet is subjected to an acceleration force of pre-selected magnitude; (e) reed switch mounted on the housing to be responsive to the position of the magnet such that the switch is activated when the magnet reaches a pre-selected activation position during movement of the magnet in response to a pre-selected acceleration force applied to the housing; and (f) an electromagnetic coil positioned to provide a magnetic field that urges the magnet to travel between the first abutment and the second abutment in a manner that emulates the acceleration of the magnet induced by rapid deceleration of the shock sensor to test the operation of the shock sensor, the electromagnetic coil being located on the housing at a position distant enough from the reed switch that the reed switch is not directly activated by energizing the coil.

Claim 14

The shock sensor of claim 10 further comprising leads to the electromagnetic coil and wherein the magnetic field of the electromagnetic coil is variable by changing the coil current pulse by application of different trigger voltages through the leads.

Claim 15

The shock sensor of claim 10 wherein the means for biasing is a spring.

Claim 16

The shock sensor of claim 10 wherein the coil is a spool having two ends and windings about the spool, and wherein one end of the spool is positioned outside of the housing perpendicular to the travel of the magnet.

Claim 17

The shock sensor of claim 10 wherein the magnetic field of the electromagnetic coil opposes the magnet.

Claim 18

A testing device for a shock sensor of the type that includes a housing having a first abutment, a second abutment of the housing spaced apart from the first abutment a fixed distance, a magnet having a first end and a second end, the magnet being slidably mounted on the housing to travel between the first abutment and the second abutment and oriented so that the first end of the magnet faces the first abutment and the second end of the magnet faces the second abutment, means for biasing positioned between the magnet and the second abutment, the magnet being held away from the second abutment by the biasing means until such time as the magnet is subjected to an acceleration force of pre-selected magnitude, and a reed switch mounted on the housing to be responsive to the position of the magnet such that the switch is activated when the magnet reaches a position during movement of the magnet in response to the pre-selected acceleration force applied to the housing, the testing device comprising an electromagnetic coil positioned to provide a magnetic field that urges the magnet to travel between the first abutment and the second abutment in a manner that emulates the acceleration of the magnet induced by rapid deceleration of the shock sensor, the electromagnetic coil being located on the housing at a position distant enough from the reed switch such that the reed switch is not directly activated by energizing the coil.

Claim 19

A testing device for a shock sensor of the type that includes a housing having a first abutment, a second abutment of the housing spaced apart from the first abutment a fixed distance, a magnet having a first end and a second end, the magnet being slidably mounted on the housing to travel between the first abutment and the second abutment and oriented so that the first end of the magnet faces the first abutment and the second end of the magnet faces the second abutment, means for biasing positioned between the magnet and the second abutment, the magnet being held away from the second abutment by the biasing means until such time as the magnet is subjected to an acceleration force of pre-selected magnitude, and a reed switch mounted on the housing to be responsive to the position of the magnet such that the switch is activated when the magnet reaches a position during movement of the magnet in response to the pre-selected acceleration force applied to the housing, the testing device comprising an electromagnetic coil positioned to provide a magnetic field that urges the magnet to travel between the first abutment and the second abutment in a manner that emulates the acceleration of the magnet induced by rapid deceleration of the shock sensor, the electromagnetic coil being located on the housing at a position distant enough from the reed switch such that the reed switch is not directly activated by energizing the coil.

Claim 20

The testing device of claim 15 further comprising leads to the electromagnetic coil and wherein the magnetic field of the electromagnetic coil is variable by changing the coil current pulse by application of different trigger voltages through the leads.

Claim 21

The testing device of claim 15 wherein the means for biasing is a spring.

Claim 22

The testing device of claim 15 wherein the coil is a spool having two ends and windings about the spool, and wherein one end of the spool is positioned outside of the housing perpendicular to the travel of the magnet.

Claim 23

The testing device of claim 15 wherein the magnetic field of the electromagnetic coil opposes the magnet.

Claim 26

The method of claim 20 wherein the shock sensor has leads to the electromagnetic coil and wherein the magnetic field of the electromagnetic coil is varied by changing the coil current pulse by application of different trigger voltages through the leads to test the shock sensor's response to varied accelerations.

Claim 27

The method of claim 20 wherein the electromagnetic coil is a spool having two ends and windings wound circumferentially about the spool, and wherein one end of the spool is positioned perpendicular to the travel of the magnet.

Claim 28

The method of claim 20 wherein the magnetic field of the electromagnetic coil opposes the magnet.

Claim 31

The method of claim 24 further comprising leads to the electromagnetic coil and wherein the magnetic field of the electromagnetic coil is variable by changing the coil current pulse by application of different trigger voltages through the leads.

Claim 32

The method of claim 24 wherein the electromagnetic coil is positioned adjacent the first abutment.

Claim 33

The method of claim 24 wherein the magnetic field of the electromagnetic coil opposes the magnet.

Claim 34

A shock sensor comprising: (a) a housing; (b) a carriage slidably mounted on the housing for travel and including a magnet portion; (c) a non-magnetic mass slidable on the carriage between a first site and a second site on the carriage; (d) a reed switch mounted on the housing to be responsive to the position of the magnet such that the reed switch is activated when the magnet travels to a pre-selected activation position during movement of the carriage in response to an initial acceleration force applied to the housing, and the reed switch will remain activated as the non-magnetic mass moves from the first site to the second site in response to an increased acceleration force, then the non-magnetic mass is moved back toward the first site upon cessation of the increased acceleration force, and until the carriage is moved back past the pre-selected activation position; (e) an electromagnetic coil positioned on the housing to provide a magnetic field that urges the magnet portion to travel in a manner that emulates the acceleration of the magnet induced by rapid acceleration of the shock sensor to confirm the operation of the shock sensor, the electromagnetic coil being located on the housing at a position distant enough from the reed switch such that the reed switch will not be directly activated by energizing the coil.

Claim 35

A shock sensor comprising: (a) a housing; (b) a carriage slidably mounted on the housing for travel and including a magnet portion; (c) a non-magnetic mass slidable on the carriage between a first site and a second site on the carriage; (d) a reed switch mounted on the housing to be responsive to the position of the magnet such that the reed switch is activated when the magnet travels to a pre-selected activation position during movement of the carriage in response to an initial acceleration force applied to the housing, and the reed switch will remain activated as the non-magnetic mass moves from the first site to the second site in response to an increased acceleration force, then the non-magnetic mass is moved back toward the first site upon cessation of the increased acceleration force, and until the carriage is moved back past the pre-selected activation position; (e) an electromagnetic coil positioned on the housing to provide a magnetic field that urges the magnet portion to travel in a manner that emulates the acceleration of the magnet induced by rapid acceleration of the shock sensor to confirm the operation of the shock sensor, the electromagnetic coil being located on the housing at a position distant enough from the reed switch such that the reed switch will not be directly activated by energizing the coil.