Abstract: This invention discloses a process for producing a low-noise gear. It consists in producing this gear by the technique of co-injection of a hard matter which will form the outer toothing and the axial portion for engagement on the shaft associated therewith, and of a damping matter which will form the heart of the thermoplastics gear.

Abstract: This invention relates to a device for receiving or rejecting coins or circular tokens, for example for coin- or token-operated telephone apparatus. It comprises, for the chute down which the coins drop, a pivoting flap of which the state, retracted or not due to the weight of an incidental coin, is determined by a piezoelectric element, such as a bimorph piezoelectric plate, which serves, or not, as anti-pivot support for this flap.

Abstract: A brush adapted to effect contact between an elastic metallic support and an electrical track which presents insulating parts and conducting parts. Said brush takes a form similar to that of a tip of a ball-point pen, with a metallic contact ball which is crimped in a metallic receiving shaft.

Abstract: This programmer control device comprises a programme-cam unit and a reversing cam unit disposed coaxially and driven for step by step rotation by rocking pawls, notably a pawl cooperating with concentric sets of teeth. The beak of this pawl comprises a stud engaging a slot formed in the first portion of a movable deceleration element having its second portion connected to the first portion by a spring and provided with an extension adapted to be locked in its forward or operative position by the movable core of an electromagnet. The slot formed in the first portion is so inclined that upon each backward movement of the pawl the fall of the beak of this pawl behind each tooth is damped out by the stud in sliding contact with the side of the slot, so as to carry along the deceleration element which may be of the frictional contact type.

Abstract: The present invention relates to a control device incorporating at least one electrical switch which can be actuated abruptly, for closing and opening, by a single rotary control cam.The control device incorporates a control cam 1 possessing a plurality of identical abrupt-drop notches 3 separated respectively by solid parts 4 identical to one another. A lever system is arranged between this cam 1 and the reversing switch 2. It comprises a first and a second lever 21 and 22 each of which pivots about a fixed axle 15 and the noses 31, 32 of which interact with the profile of the cam 1 under the action of a spring 8. A link 20 is articulated, on the one hand, at 21a on the first lever 21 and, on the other hand, at 22a on the second lever 22. It possesses a relief part 23 interacting with the reversing switch 22. When the nose 31 drops into a notch 3, with the nose 32 remaining on a solid part 4, the reversing switch is released, 6a-6b being closed and 6c-6d being open.