Abstract: The invention comprises an adjustable box wrench that can provide a more accurate grasp and/or sufficient grip/contact with the faces of the head of a bolt, nut, and/or similarly related objects. The invention comprises a series of pins and links which form a loop within a hollow body and are folded onto each other to form a tight gripping surface at the wrench's box ends. The invention may also contain slide-switches and/or scroll knobs to help actuate link closure or guide links within the chamber of the body until the desired set of links is within a box end.

Abstract: The invention comprises an adjustable box wrench that can provide a more accurate grasp and/or sufficient grip/contact with the faces of the head of a bolt, nut, and/or similarly related objects. The invention comprises a series of pins and links which form a loop within a hollow body and are folded onto each other to form a tight gripping surface at the wrench's box ends. The invention may also contain slide-switches and/or scroll knobs to help actuate link closure or guide links within the chamber of the body until the desired set of links is within a box end.

Abstract: A system for data pulse transmission through a single-wire, water-return cable payed out from a coil in an open pack to any selected length over a predetermined wide range (e.g., 4K to 16K feet) employing a toroidal core around the cable near the pack and a multiturn primary winding on the core. The single-wire cable constitutes a single turn secondary winding terminated at the receiver end by a resistor and coupled to the water (circuit ground) at the transmitting end by stray capacitance between the cable remaining in the pack and the surrounding water. The receiver employs an equalizing network to compensate for the amplitude-frequency characteristic of the cable of nominal length within the predetermined range resulting in only slight over-compensation for a shorter cable length and slight under-compensation for a longer cable length.