Abstract: A device for measuring small units of force or weight, such as the tracking force of a phonograph cartridge, includes an elastic flexure member having an electric contact for engagement with an encoder. As the flexure member is deflected by an amount proportional to the force being measured, contacts on the encoder are sequentially activated to provide an electric signal used to drive on analog, digital or numeric visual display or readout of the measured force. The device of the invention may also include a mechanism for providing a second point of support for the flexure member and a second visual scale to provide a greater range of measurement.

Abstract: An improved cartridge and head shell assembly which permits separate but simultaneous adjustment of the cartridge overhang, vertical tracking angle and lateral tracking angle by means of a single locking member. The assembly includes a base connector for connection to a tone arm and a pair of upper and lower clamps which clamp both the base connector and an extension from the cartridge holding shell, thereby to permit the cartridge to be moved in accordance with the desired adjustment.

Abstract: A unitary headshell and phonograph cartridge assembly in which the vertical angle and overhang dimension can both be independently adjusted, thereby to permit the cartridge assembly to be used with different heights of record player arms and to achieve minimum tracking angle distortion for the particular tone arm with which the cartridge assembly is utilized.

Abstract: A phonograph cartridge stylus protector includes a magnifying lens to permit the user to view a magnified image of the stylus tip. The stylus protector is pivotally mounted to the cartridge and may be positioned at a first position out of the way of the stylus, a second position in which the user may obtain one magnified view of the stylus tip while the stylus tip is inserted in a record groove, and a third, lowermost position in which the protector protects the stylus against accidental contact and in which the user may obtain a different magnified view of the stylus tip and the area adjacent the stylus tip.