Abstract:
A shock sensor (20) having some structural similarities to a reed switch, particularly in the use of a glass capsule (22) which hermetically seals the components of the shock sensor. The shock sensor employs a sensing mass (31) mounted on a metallic planar spring (32). Under the influence of a crash-induced acceleration, the sensing mass is driven against a fixed contact to close an electrical circuit. To extend the closure duration and increase the reliability, the contact surface (40) which is formed on the sensing mass is oriented at an angle of 60 degrees out of the plane containing the spring.
Abstract:
A shock sensor (300) comprises: a lead switch (310) fixed in the sensor case, and having a lead contact which changes from a first state to a second state by a magnetic force; a magnet (315) fixed apart from the lead switch by a given distance in the sensor case; a shielding member (317) having a sufficient area to shield the lead contact from the magnet force when the member is in the steady-state position; and resilient members (323) holding the shielding member in the steady-state position between the lead contact and the magnet when the sensor is in the steady state so as to hold the lead contact in the first state, and moving the member to a position so as to cause the lead contact to reach the second state when the sensor receives a shock.
Abstract:
In an acceleration sensor with a mass moved in dependence upon inertia which is held in its position of rest in a housing by two springs secured and symmetrically engaging therein and which actuates a switch at a certain acceleration threshold, the springs support the mass in relation to the housing in the position of rest and during the acceleration-governed movement and also secure the mass in a permanent mechanical bond. It is thus possible to produce an acceleration sensor which is stable over a long period and always operates precisely.
Abstract:
An electrical switch (1) comprises a pair of contacts (14, 16), at least one of which is formed from a ferromagnetic material, and means such as a number of small permanent magnets for forming a magnetic field in the region of the contacts to bring the contacts together. A movable element 10 formed from a ferromagnetic material can be moved between at least two positions, with respect to the contacts such that in one of the positions the movable element disturbs the magnetic field to allow the contacts to separate. The switch may be configured for use as a tilt switch, a g-force detector, counter or the like. It can exhibit a clean switching operation with no or little “bounce” associated with ball contacts switches, and is not environmentally harmful and the operator element is barely affected by the magnetic forces required to operate the switch.
Abstract:
The invention pertains to compounds that can be reacted with a carboxyl function to form an ester bond, with a protective group and in particular an anchor group provided for the carboxyl function. The invention also pertains to esters of acids produced through esterification with a compound as per the invention and to the use of the compounds as per the invention in peptide synthesis.
Abstract:
In a sensor (11) for the automatic triggering of safety devices in motor vehicles, a cylindrical seismic mass with a permanent magnet (17) at one end is arranged inside the housing. The permanent magnet (17) is actively coupled to a Reed switch (25), the contacts (26, 27) of which are closed in the initial position. The magnetic flux of the permanent magnet (17) is so directed and tuned to the Reed switch (25) used that the contacts of the Reed switch (25) are closed in the initial position of the sensor (11). The seismic mass (15) is arranged inside the housing with a gap Δx. It is thus possible to produce the sensor (11) simply and without any excessive adjustment effort, while the sensor (11) still triggers relatively securely and with relatively little hysterisis.
Abstract:
Impact sensor in motor vehicles with a safety system such as an air bag or belt tensioner for a passenger-restraining system. The sensor is arranged in the electrical circuit of a trip circuit of the safety system, which is closed by the action of an acceleration or deceleration over a given time-interval.
Abstract:
A motion detector, in particular suitable for animals, comprising at least one motion element, wherein an element movable within a predetermined area is located, which brings about an electrical connection in at least one position, wherein the movable element is a magnetic element, which can move along a path of travel formed by a cavity in the motion element, and wherein, near the path of travel, at least one magnetically sensitive switching element is placed, which can be influenced by the magnetic element.
Abstract:
L'invention concerne un interrupteur, en particulier pour la mise en marche et l'arrêt d'au moins une unité d'opération d'un véhicule automobile, destiné à coopérer avec un verrou d'antivol comprenant un stator (1) et un rotor (2) pouvant être entraîné en rotation dans le stator et possédant au moins un aimant permanent (6) solidarisé au rotor (2), interrupteur comprenant au moins deux ampoules Reed (7A, 7B) pourvues de broches (8A, 8B) et reliées électriquement par leurs broches aux contacts (10A, 10B, 10C) d'un connecteur. Selon l'invention, lesdites ampoules Reed sont disposées sur un corps de connecteur (4) destiné à être fixé sur ledit stator (1) dans une position dite de fonctionnement de façon amovible.
Abstract:
An acceleration detection device and method of setting the sensitivity of the device, comprising a compression coil spring having a nonlinear deflection-load characteristic, wherein the setting of sensitivity of the acceleration detection device is performed by adjusting the characteristics of a compression coil spring such as the spring constant and initial load of the compression coil spring and also adjusting the dimensions of a mass body in the shaft sliding direction.