US3742858A - Sensor-detonator module - Google Patents
Sensor-detonator module Download PDFInfo
- Publication number
- US3742858A US3742858A US00145282A US3742858DA US3742858A US 3742858 A US3742858 A US 3742858A US 00145282 A US00145282 A US 00145282A US 3742858D A US3742858D A US 3742858DA US 3742858 A US3742858 A US 3742858A
- Authority
- US
- United States
- Prior art keywords
- detonator
- sensor
- terminal
- pin
- electrically connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
- F42C15/40—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected electrically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/06—Electric contact parts specially adapted for use with electric fuzes
Definitions
- ABSTRACT [52] US. Cl 102/702 R, ZOO/61.45, 180/103,
- the Sens and demnamr are sealed within a 200/6 1 /103 280/ can.
- An insulated pin passes through the can to connect 220/23 206/36 to a source of electricity.
- a capacitor and a diode may be provided to insure the firing of the detonator even [56] References Cited though the circuit to the electrical source is broken or UNITED STATES PATENTS 3,647,999 7/1970 Mazelsky ZOO/61.45 6 Claims, 3 Drawing Figures PATENIEuJuLa Ian 3.742.858
- the inflatable air bag is a new safety device for protecting automobile passengers in a collision.
- a sensor detects the change in motion and closes a switch. This fires a detonator which releases gas under high pressure from a bottle into a folded bag. The bag expands in front of the passenger and prevents him from striking the dashboard. See U. S. Pat. No. 3,485,973.
- An insulated pin passes through the ca n to carry electricity to the detonator. Since the module has a metal can, the detonator is protected from static electricity and radio frequency radiation. There are no loose wires connnecting the sensor and the detonator which could be broken to prevent the device from functioning or which, if external, could permit a person not familiar with the device, such as a child, to inadvertently make a connection which would fire the detonator.
- the module also significantly reduces the hazard of accidental firing since the sensor and detonator have been pre-wired.
- a capacitor may be provided inside the module so that the detonator can be fired from the electricity stored in the capacitor even though the external connection to an electrical source may have been broken.
- a diode may also be included inside the module to prevent drainage of the capacitor should the connection to the electrical source become shorted.
- FIG. 1 is a side view in section of a certain presently preferred embodiment of the module of this invention.
- FIG. 2 is a plan view of the module of FIG. 1 through section A--A.
- FIG. 3 is a circuit diaghram showing the firing circuit employed in FIGS. 1 and 2.
- a can 1 is formed from a cup portion 2 and a lid 3 which is rolled over the cup portion at 4 to provide a seal.
- a metal ring 5 is welded to the can and holds metal pin 6 within glass seal 7.
- Pin 6 is connected by wire 8 to diode 9.
- the diode is connected by wire 10 to terminal 11 of sensor 12.
- the sensor is a device well known to the art which detects a change in motion, that is, an acceleration or deceleration greater than a predetermined minimum amount, and closes a switch in response to the detected change.
- the sensor may detect a change in motion in one direction, or preferably in all directions as in an omnidirectional switch. See, for example, U. S. Pat. No. 3,457,382.
- wire 13 which leads to capacitor 14.
- Another wire 15 connects the capacitor to the can which is grounded.
- a well 16 in the can is provided for the insertion of a linear shaped charge 21, a well-known form of explosive which is used to fracture a bottle of compressed gas (not shown) which inflates the air bag.
- Adjacent the well is a detonator 17 held by metallic support 18.
- the detonator is commercially available and is electrically activated. It is tired by sending a current through its shell and pin 19.
- Terminal strip 20 holds the detonator in place and connects pin 19 to one side of the switch in the sensor, terminal 11 being connected to the other side.
- capacitor 14 will, for a few seconds, supply enough electrical energy to fire the detonator. If the accident shorts pin 6 to ground, the capacitor will not be shorted since diode 9 prevents current from flowing back to pin 6 from terminal 11.
- a sensondetonator module comprising:
- a sealed metal can having a metal pin passing therethrough in sealed insulated relationship therewith;
- a sensor inside said can for detecting a change in motion and for closing a switch in response thereto, said switch having a first and a second terminal, said first terminal being electrically connected to said pin and said second terminal being electrically connected to the terminal of said detonator which is not electrically connected to said can.
- a module according to claim 1 wherein a capacitor is electrically connected to said can and to said first terminal.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14528271A | 1971-05-20 | 1971-05-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3742858A true US3742858A (en) | 1973-07-03 |
Family
ID=22512397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00145282A Expired - Lifetime US3742858A (en) | 1971-05-20 | 1971-05-20 | Sensor-detonator module |
Country Status (6)
Country | Link |
---|---|
US (1) | US3742858A (it) |
CA (1) | CA962298A (it) |
DE (1) | DE2224197A1 (it) |
FR (1) | FR2138851B1 (it) |
GB (1) | GB1361904A (it) |
IT (1) | IT957911B (it) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3871472A (en) * | 1972-02-23 | 1975-03-18 | Nissan Motor | Actuator of motor vehicle safety device |
US3875434A (en) * | 1973-10-31 | 1975-04-01 | Du Pont | Pressure-sensitive sensor/logic assembly |
US3980318A (en) * | 1974-04-15 | 1976-09-14 | Eaton Corporation | Fused multiple stage inflation system |
DE2631190A1 (de) * | 1976-07-10 | 1978-01-19 | Daimler Benz Ag | Ausloesevorrichtung fuer eine insassenschutzvorrichtung in einem fahrzeug |
US4974873A (en) * | 1987-02-26 | 1990-12-04 | Honda Giken Kogyo Kabushiki Kaisha | Malfunction preventing device for air bag module in automobiles |
US5178409A (en) * | 1990-04-27 | 1993-01-12 | Toyoda Gosei Co., Ltd. | Steering wheel equipped with an air bag system |
US5324074A (en) * | 1991-11-07 | 1994-06-28 | Christian Ronald A | Airbag system |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2813457A1 (de) * | 1978-03-29 | 1979-10-11 | Bosch Gmbh Robert | Einrichtung zur ausloesung von rueckhaltesystemen fuer kraftfahrzeuginsassen |
DE3518502A1 (de) * | 1985-05-23 | 1986-11-27 | Daimler-Benz Ag, 7000 Stuttgart | Ausloesevorrichtung fuer rueckhaltesysteme in kraftfahrzeugen |
US4924774A (en) * | 1989-05-16 | 1990-05-15 | Trw Vehicle Safety Systems Inc. | Apparatus for igniting a pyrotechnic transmission line |
DE4008960A1 (de) * | 1990-03-20 | 1991-09-26 | Bayern Chemie Gmbh Flugchemie | Sicherheitseinrichtung fuer kraftfahrzeuge |
US5728964A (en) | 1993-10-20 | 1998-03-17 | Quantic Industries, Inc. | Electrical initiator |
US5648634A (en) | 1993-10-20 | 1997-07-15 | Quantic Industries, Inc. | Electrical initiator |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3604356A (en) * | 1969-03-06 | 1971-09-14 | Us Navy | Variable time ordnance fuze circuit |
US3629816A (en) * | 1970-08-10 | 1971-12-21 | Gen Motors Corp | Air cushion actuation and monitoring circuit |
US3647999A (en) * | 1970-07-23 | 1972-03-07 | Ara Inc | Deceleration-responsive sensors |
US3668627A (en) * | 1970-09-21 | 1972-06-06 | Gen Motors Corp | Air cushion actuation and monitoring circuit |
-
1971
- 1971-05-20 US US00145282A patent/US3742858A/en not_active Expired - Lifetime
-
1972
- 1972-05-17 IT IT50301/72A patent/IT957911B/it active
- 1972-05-17 CA CA142,626A patent/CA962298A/en not_active Expired
- 1972-05-18 DE DE19722224197 patent/DE2224197A1/de active Pending
- 1972-05-18 GB GB2334672A patent/GB1361904A/en not_active Expired
- 1972-05-19 FR FR727218177A patent/FR2138851B1/fr not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3604356A (en) * | 1969-03-06 | 1971-09-14 | Us Navy | Variable time ordnance fuze circuit |
US3647999A (en) * | 1970-07-23 | 1972-03-07 | Ara Inc | Deceleration-responsive sensors |
US3629816A (en) * | 1970-08-10 | 1971-12-21 | Gen Motors Corp | Air cushion actuation and monitoring circuit |
US3668627A (en) * | 1970-09-21 | 1972-06-06 | Gen Motors Corp | Air cushion actuation and monitoring circuit |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3871472A (en) * | 1972-02-23 | 1975-03-18 | Nissan Motor | Actuator of motor vehicle safety device |
US3875434A (en) * | 1973-10-31 | 1975-04-01 | Du Pont | Pressure-sensitive sensor/logic assembly |
US3980318A (en) * | 1974-04-15 | 1976-09-14 | Eaton Corporation | Fused multiple stage inflation system |
DE2631190A1 (de) * | 1976-07-10 | 1978-01-19 | Daimler Benz Ag | Ausloesevorrichtung fuer eine insassenschutzvorrichtung in einem fahrzeug |
US4178016A (en) * | 1976-07-10 | 1979-12-11 | Daimler-Benz Aktiengesellschaft | Triggering installation for a passenger protection device in a vehicle |
US4974873A (en) * | 1987-02-26 | 1990-12-04 | Honda Giken Kogyo Kabushiki Kaisha | Malfunction preventing device for air bag module in automobiles |
US5178409A (en) * | 1990-04-27 | 1993-01-12 | Toyoda Gosei Co., Ltd. | Steering wheel equipped with an air bag system |
US5324074A (en) * | 1991-11-07 | 1994-06-28 | Christian Ronald A | Airbag system |
Also Published As
Publication number | Publication date |
---|---|
DE2224197A1 (de) | 1972-11-30 |
IT957911B (it) | 1973-10-20 |
CA962298A (en) | 1975-02-04 |
GB1361904A (en) | 1974-07-30 |
FR2138851B1 (it) | 1973-07-13 |
FR2138851A1 (it) | 1973-01-05 |
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