Abstract: A break-open firearm having an improved cocking mechanism in which the hammer strut is extended to interact with the cocking rod without an intermediate energy-consuming arrangement.

Abstract: An accessory device, such as a lamp, includes a mounting mechanism adapted for attachment to various machines. A mount ring is supported by the machine, preferably concentrically to the machine head, through a plurality of attachment assemblies maintaining the ring in a fixed plane but allowing angular displacement thereof to permit selective adjustment of an elongated, flexible accessory-equipped arm.

Abstract: A tangential transducer arm assembly for disk play-back machines, whose pivot for movement in the plane which is parallel to the surface of a disk, is disposed upon a carriage for linear movement upon a track in a plane which exists perpendicular to said disk and which intersects the rotational axis of said disk.One of two embodiments utilizes the frictional drag between said disk and a stylus to pull said carriage along said track, while a mass suspended in a liquid checks that movement to hold said carriage in the correct position for transducer arm tangency.The other embodiment utilizes a stepping motor to drive said carriage along said track. Said stepping motor derives its drive signal from the misalignment of a magnet and a differential Hall effect sensor. Said magnet is part of said transducer arm and said differential Hall effect sensor is fixed to a true tangency indicating reference base, whose pivot is the same as said pivot and whose rotation is determined by a cam surface.