US4857680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acceleration sensor
Assignee: Ford Motor Co
•
Filing: 1988-12-22
•
Granted: 1989-08-15
•
Expires: 2008-12-22
Abstract
Abstract An acceleration sensor is provided for electrically activating electrically operated automotive occupant restraints which employs switch contacts arranged in a cylindrical housing to resiliently bias a sensing mass in columnar fashion and collapse to effect contact upon movement of the sensing mass responsive to an acceleration pulse above a predetermined magnitude and duration.
Inventors
- 👤 Adam M. Janotik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:20
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/14
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
279 words
An acceleration sensor for transmitting an electrical signal from a power supply to an inflatable occupant restraint system of an automobile upon the occurrence of an acceleration pulse of predetermined magnitude and duration, the sensor comprising: an elongated housing adapted to be mounted in the vehicle and having an axially extending bore extending from an open end of the housing and terminating at a closed end; a sensing mass slidingly received in the bore and having a cylindrical outer surface sized to define a predetermined diametral clearance with the bore; a plug sealingly engaged with the housing to close the housing open end and therewith define a closed sensing chamber; a columnar contact member formed of electrically conductive material as a resilient blade member sealingly carried by the plug and extending therethrough and having a contact portion abuttingly engaging the sensing mass to urge the sensing mass toward the housing closed end and a connecting column portion extending between the contact portion and the plug; and a ring contact member formed of electrically conductive material, sealingly carried by the plug and extending therethrough and having a circumferentially extending contact plate received in the bore in axial registration with a portion of the connecting column portion and radially spaced therefrom, the collapsing column contact member and the ring contact member defining a normally open switch connected between the power supply and the inflatable occupant restraint system; whereby upon the occurrence of the predetermined acceleration pulse, the sensing mass slides away from the housing closed end, deflecting the column portion into engagement with the contact plate to transmit the electrical signal from the power supply to the inflatable occupant restraint system.
Claim 2
Dependent Claim
279 words
An acceleration sensor for transmitting an electrical signal from a power supply to an inflatable occupant restraint system of an automobile upon the occurrence of an acceleration pulse of predetermined magnitude and duration, the sensor comprising: an elongated housing adapted to be mounted in the vehicle and having an axially extending bore extending from an open end of the housing and terminating at a closed end; a sensing mass slidingly received in the bore and having a cylindrical outer surface sized to define a predetermined diametral clearance with the bore; a plug sealingly engaged with the housing to close the housing open end and therewith define a closed sensing chamber; a columnar contact member formed of electrically conductive material as a resilient blade member sealingly carried by the plug and extending therethrough and having a contact portion abuttingly engaging the sensing mass to urge the sensing mass toward the housing closed end and a connecting column portion extending between the contact portion and the plug; and a ring contact member formed of electrically conductive material, sealingly carried by the plug and extending therethrough and having a circumferentially extending contact plate received in the bore in axial registration with a portion of the connecting column portion and radially spaced therefrom, the collapsing column contact member and the ring contact member defining a normally open switch connected between the power supply and the inflatable occupant restraint system; whereby upon the occurrence of the predetermined acceleration pulse, the sensing mass slides away from the housing closed end, deflecting the column portion into engagement with the contact plate to transmit the electrical signal from the power supply to the inflatable occupant restraint system.
Claim 3
Dependent Claim
14 words
A sensor as defined in claim 1, wherein the housing is fabricated from glass.
Claim 4
Dependent Claim
17 words
A sensor as defined in claim 1, wherein the housing and the plug are fabricated from glass.
Claim 5
Dependent Claim
18 words
A sensor as defined in claim 1, wherein the sensing chamber is filled with a dry inert gas.
Claim 6
Dependent Claim
12 words
A sensor as defined in claim 4, wherein the gas is argon.
Claim 7
Dependent Claim
12 words
A sensor as defined in claim 4, wherein the gas is nitrogen.
Claim 8
Dependent Claim
22 words
A sensor as defined in claim 1, wherein the columnar contact member and the ring contact member are fabricated from beryllium copper.
Claim 9
Dependent Claim
22 words
A sensor as defined in claim 1, wherein the columnar contact member and the ring contact member are fabricated from stainless steel.
Claim 10
Dependent Claim
19 words
A sensor as defined in claim 1, wherein the connecting column portion is radially offset from the contact portion.
Claim 11
Dependent Claim
277 words
An acceleration sensor for transmitting an electrical signal from a power supply to an inflatable occupant restraint system of an automobile upon the occurrence of an acceleration pulse of predetermined magnitude and duration, the sensor comprising: an elongated housing adapted to be mounted in the vehicle and having an axially extending bore extending from an open end of the housing and terminating at a closed end; a sensing mass slidingly received in the bore and having a cylindrical outer surface sized to define a predetermined diametral clearance with the bore; a plug sealingly engaged with the housing to close the housing open end and therewith define a closed sensing chamber; a columnar contact member formed of electrically conductive material as a resilient blade member sealingly carried by the plug and extending therethrough and having a contact portion abuttingly engaging the sensing mass to urge the sensing mass toward the housing closed end and a connecting column portion radially offset from the contact portion; and a ring contact member formed of electrically conductive material, sealingly carried by the plug and extending therethrough and having a circumferentially extending contact plate received in the bore in axial registration with a portion of the connecting column portion and radially spaced therefrom, the collapsing column contact member and the ring contact member defining a normally open switch connected between the power supply and the inflatable occupant restraint system; whereby upon the occurrence of the predetermined acceleration pulse, the sensing mass slides away from the housing closed end, deflecting the column portion into engagement with the contact plate to transmit the electrical signal from the power supply to the inflatable occupant restraint system.
Claim 12
Dependent Claim
277 words
An acceleration sensor for transmitting an electrical signal from a power supply to an inflatable occupant restraint system of an automobile upon the occurrence of an acceleration pulse of predetermined magnitude and duration, the sensor comprising: an elongated housing adapted to be mounted in the vehicle and having an axially extending bore extending from an open end of the housing and terminating at a closed end; a sensing mass slidingly received in the bore and having a cylindrical outer surface sized to define a predetermined diametral clearance with the bore; a plug sealingly engaged with the housing to close the housing open end and therewith define a closed sensing chamber; a columnar contact member formed of electrically conductive material as a resilient blade member sealingly carried by the plug and extending therethrough and having a contact portion abuttingly engaging the sensing mass to urge the sensing mass toward the housing closed end and a connecting column portion radially offset from the contact portion; and a ring contact member formed of electrically conductive material, sealingly carried by the plug and extending therethrough and having a circumferentially extending contact plate received in the bore in axial registration with a portion of the connecting column portion and radially spaced therefrom, the collapsing column contact member and the ring contact member defining a normally open switch connected between the power supply and the inflatable occupant restraint system; whereby upon the occurrence of the predetermined acceleration pulse, the sensing mass slides away from the housing closed end, deflecting the column portion into engagement with the contact plate to transmit the electrical signal from the power supply to the inflatable occupant restraint system.
Claim 13
Dependent Claim
14 words
A sensor as defined in claim 10, wherein the housing is fabricated from glass.
Claim 14
Dependent Claim
17 words
A sensor as defined in claim 10, wherein the housing and the plug are fabricated from glass.
Claim 15
Dependent Claim
18 words
A sensor as defined in claim 10, wherein the sensing chamber is filled with a dry inert gas.
Claim 16
Dependent Claim
12 words
A sensor as defined in claim 13, wherein the gas is argon.
Claim 17
Dependent Claim
12 words
A sensor as defined in claim 13, wherein the gas is nitrogen.
Claim 18
Dependent Claim
22 words
A sensor as defined in claim 10, wherein the columnar contact member and the ring contact member are fabricated from beryllium copper.
Claim 19
Dependent Claim
22 words
A sensor as defined in claim 10, wherein the columnar contact member and the ring contact member are fabricated from stainless steel.
Claim 20
Dependent Claim
30 words
A sensor as defined in claim 10, wherein the sensing mass comprises a cylindrical member having a central recess formed on at least one end for receiving the contact portion.
Claim 21
Dependent Claim
244 words
An acceleration sensor for transmitting an electrical signal upon the occurrence of an acceleration pulse of predetermined magnitude and duration, the sensor comprising: an elongated housing adapted to be mounted in the vehicle and having an axially extending bore extending from an open end of the housing and terminating at a closed end; a sensing mass slidingly received in the bore and having a cylindrical outer surface sized to define a predetermined diametral clearance with the bore; a plug sealingly engaged with the housing to close the housing open end and therewith define a closed sensing chamber; a columnar contact member formed of electrically conductive material as a resilient blade member sealingly carried by the plug and extending therethrough and having a contact portion abuttingly engaging the sensing mass to urge the sensing mass toward the housing closed end and a connecting column portion extending between the contact portion and the plug; and a ring contact member formed of electrically conductive material, sealingly carried by the plug and extending therethrough and having a circumferentially extending contact plate received in the bore in axial registration with a portion of the connecting column portion and radially spaced therefrom, the columnar contact member and the ring contact member defining a normally open switch; whereby upon the occurrence of the predetermined acceleration pulse, the sensing mass slides away from the housing closed end, deflecting the column portion into engagement with the contact plate to transmit the electrical signal.
Claim 22
Dependent Claim
244 words
An acceleration sensor for transmitting an electrical signal upon the occurrence of an acceleration pulse of predetermined magnitude and duration, the sensor comprising: an elongated housing adapted to be mounted in the vehicle and having an axially extending bore extending from an open end of the housing and terminating at a closed end; a sensing mass slidingly received in the bore and having a cylindrical outer surface sized to define a predetermined diametral clearance with the bore; a plug sealingly engaged with the housing to close the housing open end and therewith define a closed sensing chamber; a columnar contact member formed of electrically conductive material as a resilient blade member sealingly carried by the plug and extending therethrough and having a contact portion abuttingly engaging the sensing mass to urge the sensing mass toward the housing closed end and a connecting column portion extending between the contact portion and the plug; and a ring contact member formed of electrically conductive material, sealingly carried by the plug and extending therethrough and having a circumferentially extending contact plate received in the bore in axial registration with a portion of the connecting column portion and radially spaced therefrom, the columnar contact member and the ring contact member defining a normally open switch; whereby upon the occurrence of the predetermined acceleration pulse, the sensing mass slides away from the housing closed end, deflecting the column portion into engagement with the contact plate to transmit the electrical signal.
Claim 23
Dependent Claim
19 words
A sensor as defined in claim 19, wherein the connecting column portion is radially offset from the contact portion.
Claim 24
Dependent Claim
169 words
An acceleration sensor for transmitting an electrical signal from a power supply to an inflatable occupant restraint system of an automobile, the sensor comprising: a housing having an axially extending bore including a closed end; a sensing mass mounted in the housing at the closed end for damped slidable movement along an axis of the housing bore in response to changes in the velocity of the automobile with respect to the axis; a fixed electrical contact fixedly mounted within the housing bore; and a deflectable electrical contact having an end fixedly carried with the housing and having a contact portion resiliently engaging the sensing mass in columnar fashion to bias the mass in one direction with respect to the housing, the sensing mass being operative upon the occurrence of an acceleration pulse of predetermined magnitude to move to collapse the deflectable contact, reducing the biasing force thereof porportional to the movement and causing portions of the deflectable contact to engage the fixed electrical contact, thereby transmitting the electrical signal.
Claim 25
Dependent Claim
169 words
An acceleration sensor for transmitting an electrical signal from a power supply to an inflatable occupant restraint system of an automobile, the sensor comprising: a housing having an axially extending bore including a closed end; a sensing mass mounted in the housing at the closed end for damped slidable movement along an axis of the housing bore in response to changes in the velocity of the automobile with respect to the axis; a fixed electrical contact fixedly mounted within the housing bore; and a deflectable electrical contact having an end fixedly carried with the housing and having a contact portion resiliently engaging the sensing mass in columnar fashion to bias the mass in one direction with respect to the housing, the sensing mass being operative upon the occurrence of an acceleration pulse of predetermined magnitude to move to collapse the deflectable contact, reducing the biasing force thereof porportional to the movement and causing portions of the deflectable contact to engage the fixed electrical contact, thereby transmitting the electrical signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |