Abstract: The present invention is directed to an airbag explosive composition comprising a fuel ingredient, an oxidizing agent and a binder for binding them, said binder being hydrotalcite group expressed by the following general formula (1), and a producing method therefor:[M.sup.2+.sub.1-x M.sup.3+.sub.x (OH).sub.2 ].sup.x+ [A.sup.n-.sub.x/n. mH.sub.2 O].sup.x- (1)whereM.sup.2+ represents a bivalent metal such as Mg.sup.2+, Mn.sup.2+, Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cu.sup.2+ and Zn.sup.2+ ;M.sup.3+ represents a trivalent metal such as Al.sup.3+, Fe.sup.3+, Cr.sup.3+, Co.sup.3+ and In.sup.3+ ;A.sup.n- represents an n-valence anion such as OH.sup.-, F.sup.-, Cl.sup.-, NO.sub.3.sup.-, C0.sub.3.sup.2-, SO.sub.4.sup.2-, Fe(CN).sub.6.sup.3-, CH.sub.3 COO.sup.-, oxalate ion and salicylate ion; and0<x.ltoreq.0.33.

Abstract: The collision detection device for appropriately actuating two or more types of passenger safety devices (5,6,7,8) which are installed on a vehicle and respectively have different performances depending on collision types such as a front collision and a side collision, and comprising two acceleration sensors (S1,S2) installed respectively in different directions and a controller for selecting appropriate passenger safety devices to be actuated from said plurality of passenger safety devices in accordance with a direction of a collision when recognizing the collision on the basis of accelerations detected by the two acceleration sensors, and for actuating them, said controller (4) having collision detecting axes related with said passenger safety devices respectively, said collision detecting axes preset in directions assumed as directions for detecting the collision which are front, right and left directions and further at least one additional directions which are different from said front, right and left dir

Abstract: A gas generator for an air bag, including a combustion chamber and a hermetic container accommodated in the combustion chamber. Gas generant pellets are charged in the hermetic container. The hermetic container has a wall adapted to be destroyed during combustion of the gas generant pellets. A partition foil piece covers a surface formed by the gas generant pellets charged in the hermetic container so as to conform to a profile of the surface formed by the gas generant pellets. The partition foil piece is non-reactive with the gas generant pellets and has a strength lower than that of the hermetic container. A cushioning member presses the partition foil piece toward the gas generant pellets by a resilient force of the cushioning member so as to suppress movement of the gas generant pellets charged in the hermetic container.

Abstract: An actuation apparatus (1) for actuating a protective device for the safety of vehicle occupants, including an accelerometer (S) which outputs a deceleration signal at a time of a crash; a central processing unit (16) in which the signal received from the accelerometer (S) undergoes arithmetic operations; a first memory (17) for the central processing unit (16), which is a read only memory and constitutes a one-chip microcomputer (2) together with the central processing unit (16), in which an algorithm for the signal received from the accelerometer (S) undergoing the arithmetic operations is preset; a second memory (18) for the central processing unit (16), which is a writable memory and is preset with parameters for use in the arithmetic operations, the parameters are determined by crash tests varying according to vehicle type and are specific values corresponding to a specific type of vehicle; and an ignition circuit (6) for actuating the protective device on a basis of a signal received from the central pr

Abstract: A system for judging to permit actuating a safety device for protecting an occupant seated on the passenger seat of a vehicle. The system is capable of detecting a rearward facing child seat. The system is able to judge in many situations as to whether it is necessary to permit actuating the safety device. The safety device has an air bag storing portion holding an air bag therein. The storing portion is located in front of the front passenger seat. On rapid deceleration of the vehicle, the safety device is set into actuation to inflate the air bag. The system uses plural distance sensors to detect the distances to an upper portion and a lower portion, respectively, of an object existing in the space between the air bag storing portion and the passenger seat. According to the output signals from the distance sensors, the system judges as to whether it is necessary to permit actuating the safety device.

Abstract: A crash sensor including an accelerometer, a calculation device, a comparator, a trigger circuit, a physical quantity calculation device, and an adjusting device. The accelerometer develops an acceleration signal and the calculation device calculates a first value corresponding to a magnitude of deceleration based on the acceleration signal. The comparator compares the first value and the trigger circuit actuates a protective device, such as an air bag, upon receiving the trigger signal from the trigger circuit. The physical quantity calculation device calculates a magnitude of physical quantities in a wave defined by acceleration signals during an initial stage of a crash. The adjusting device adjusts at least one of the first value corresponding to the magnitude of deceleration and the threshold value used by the comparator on a basis of the magnitude of physical quantities.

Abstract: A gas generator for an air bag is provided which contains a spontaneously-firing explosive composition in which at least one of a squib, igniting agent and a gas generant is contained in a casing formed of a light alloy material, the spontaneously-firing explosive composition containing carbohydrates, oxohalogenates and metal oxides or alternatively carbohydrates, oxohalogenates, metal oxides and one or more synthetic resins. The spontaneously-firing explosive composition has a spontaneous firing property in temperature range of either 165.degree.-220.degree. C. or 165.degree.-200.degree. C. The effective temperature range may be selected as needed.

Abstract: An electronic crash sensor which can operate appropriately in response to any form of crash of any vehicle, more especially to a high speed oblique or pole crash of a vehicle which has a less rigid body or to a compound crash which is compound of various forms of crash, to say nothing of a high speed oblique or pole crash of a vehicle which has a normal rigid body. An input acceleration waveform from an accelerometer is processed to peak cut any portion thereof lower than a predetermined value. Then, the value obtained by the said peak cutting is time integrated. Then, a time integrated value of a predetermined function is subtracted from the value obtained by the said time integration.

Abstract: The crash sensor of the present invention comprises a magnet, a sensing mass made of a ferromagnetic material and attractable by the magnet, a sleeve made of a paramagnetic material and restricting the movement of the sensing mass in one direction, a pair of strips that make a closed circuit by contact with the sensing mass having moved in one direction and a body fitted with the magnet and housing the sensing mass, the sleeve and the contacts; the crash sensor further comprising a magnetic shield made of a ferromagnetic material and covering the magnet and the body. The magnetic shield forms a closed-type magnetic field by covering the magnet and the body and forms an appropriate magnetic loop in the vicinity of the sensing mass, so that the crash sensor also acts as a magnetic shield to protect itself from being influenced by outside ferromagnetic bodies and makes effective use of the magnetic force of the magnet.

Abstract: An electronic crash sensor which can operate appropriately in response to any form of crash of a vehicle. An input acceleration waveform from an accelerometer is first processed to peak cut any portion thereof lower than a predetermined value. Then, a value obtained such peak cutting is time integrated. Then, a time integrated value of a predetermined function is subtracted from a value obtained by such time integration. Then, the value of the acceleration waveform thus obtained is compared with a predetermined time function value, and when the former is higher than the latter, a triggering signal is delivered to a trigger circuit to trigger operation of a passenger protecting apparatus such as an air bag of the vehicle.