Abstract: The invention relates to an assembly of two retention elements of two boots of a skier on two skis. Each retention element has a retention jaw, a return spring of the jaw, a linkage for transmission of movement between the retention jaw and the spring, an adjustment mechanism acting on the transmission linkage to modify in a differential manner the release threshold of the jaw depending upon which it displaces from one side or the other with respect to its aligned position, a manipulation element adapted to be activated from the other retention element and to control the adjustment mechanism.

Abstract: The present invention provides an athletic shoe with a detachable sole having an electronic sensing and breakaway system. An upper sole member is detachably connected to a lower sole member which may have a plurality of cleats attached to the bottom of the lower sole member. There are a series of latch mechanisms which detachably hold the upper and lower sole members together, which protrude from the upper sole member and terminate in recesses in the lower sole member. The latch mechanisms are spring-biased toward a retracted position and are held in the extended latching position against the spring force by a system of pressurized fluid. Additionally, there are a number of strain gauges or sensors in the upper sole member and extend into recesses of the lower sole member. These strain gauges continuously sense the shear force applied to the cleats or sole when in use and emit a signal to a trigger mechanism located in the upper sole member when the shear force exceeds a pre-set level.

Abstract: A ski binding comprising a release mechanism controllable voluntarily through a wireless transmission path and releases a lock of a jaw of the binding, which transmission path is controlled by a manually operable switch. To avoid an undesired release of the binding, it is provided that the switch is countersunk into an outwardly opening recess in the handle on a skipole, so that the manually operable part of a button on the switch can be manually engaged only by purposefully inserting a finger of a user's hand into the recess.

Abstract: This process involves detecting piezo-electric potentials which are characteristic of a mechanical strain exerted on a long rigid member made of organic material. For this purpose, the potentials at two points spaced apart on this member are measured by means of two operational amplifiers CI.sub.1 and CI.sub.2 in order to obtain a signal which is characteristic of the stress rather than of its derivative and these signals are processed by means of analog operators OA.sub.1, OA.sub.2, OA.sub.3 in order to identify the bending .DELTA. F and torsional T stresses which are then compared with reference values RT, RF in order, for example, to trigger a signal. This process can be used for opening a safety ski binding.

Abstract: The device is automatically re-armed and comprises at least one pyrotechnic jack and a push-member actuated by the jack for unlocking the fixture. A loader carries a plurality of pyrotechnic charges for actuating the jack in succession. A device is provided for igniting the charges and a device is provided for positioning the charges of the loader with respect to the push-member and with respect to the device for igniting the charges.The present invention relates to an automatically re-armed electro-pyrotechnic unlocking device and more particularly, although not exclusively, to such a device applied to a safety fixture or binding for a ski.Safety fixtures are known which are opened by a pyrotechnic charge which is ignited by means responsive to critical exterior influences when said influences appear or act.An object of the invention is to provide an unlocking device of the aforementioned type which is relatively simple in construction and easy to use.