Abstract: A deflectable biopsy catheter for obtaining a tissue sample from a body cavity of a patient comprising: an axially elongated catheter shaft having proximal and distal portions respectively terminating at proximal and distal ends, the catheter shaft being sized and constructed to be advanced into a body cavity of a patient; a deflection wire coupled to the distal portion of the catheter shaft and extending within the catheter to the proximal end thereof; and a pair of biopsy jaws coupled to the distal end of the catheter shaft and having first and second opposed free cutting surfaces exposable for contact with a selected area of tissue within the patient's body cavity and movable with respect to each other to cut a tissue sample from the selected area of tissue. Schemes for obtaining samples from body cavities (e.g., the gastrointestinal tract, the heart, the intestines, the uterus, the muscles, the bile duct, and the esophagus) are disclosed.

Abstract: The invention relates to a dual-action angular anti-return device for a turnstile, comprising a drum fast to the turnstile, a fixed vee open facing the drum, a roller positioned between the vee and the drum and alternately wedgeable between the two faces of said vee and said drum, a support for the roller displaceable alternately by two electromagnets themselves energizable from a source. A capacitor is charged by the source on each energization of any one of the electromagnets and discharged into the other electromagnet as soon as said energization is interrupted, which then results in the desired unwedging of the roller.

Abstract: An angular non return device is provided associated with a turnstile (1) having an axis X and capable of acting at will in one or the other direction. This device comprises a drum of revolution (2) integral with the turnstile and coaxial therewith, a fixed vee (3) whose bisecting plane contains the axis X, a roller (4) interposed between the vee and the drum and mounted on a lever (5) so that it may be moved between a first end position in which it is locked by jamming between the drum and a face (3.sub.1) of the vee and a second end position in which it is locked by jamming between the drum and the other face (3.sub.2) of the vee, and electromagnetic elements (6 to 10) for urging the roller at will towards one or other of its two end positions. Portions (14, 15) of the drum are recessed so as to prevent locking of the turnstile in certain angular positions.

Abstract: It is a question of bringing resiliently and successively the arms of a turnstile to their position obstructing a passage to be controlled, and for this a rotary cam 1 in the shape of a star is used interlocked with the rotary assembly of the turnstile and a roller 2 resiliently applied against this cam.To avoid lifting-off between the roller and the cam, a second contact is used between a second roller 2 connected to the first roller or merging therewith and a second cam 10 connected to the first cam or merged therewith, the directions of application of the two roller-cam contacts being opposite.The invention applies to controlling access to urban rail networks.

Abstract: The passage comprises two successive gates, maneouvrable in rotation in a single direction and conjugated to one another so that initially one is closed and the other open. These gates are sufficiently close to one another so that, on the opening of the first by a passenger arriving in the normal direction, the other closes thereby resisting the passage of a defrauder in the opposite direction.