Abstract: An ultrasound sector scan imaging system employing a hand held scan unit is provided with an adapter mounting which is affixed over the scan section, and a sterile glove or boot which encloses the scanner and the mount. A disposable needle guide mechanism is fitted, saddle style, to the mounting over the boot. The disposable guide has a channel for locating the biopsy needle in the sector scan plane, and a depression therein for hand-maintenance of the needle in the guide, during the needle location process, and for free removal of the scanner once the desired position is achieved.

Abstract: A stationary contact of an electromagnetic contactor having an insulating contact mounting plate, is part of a contact combination that includes a contact arm, a retainer and a fastening screw for electrically and mechanically securing the contact combination to a terminal of the contactor. The contact is mounted on the forward end of the arm and the retainer, constructed of spring sheet material, engages the rear of the arm. The front of the arm and the retainer cooperate to form a recess which receives and grips an L-shaped formation of the mounting plate.