Abstract: A mounting arm is disclosed on one end of which a piece of electronic or other equipment is mounted and the other end of which is detachably fastened to the edge of a supporting surface. The arm has three moving joints that permit the equipment fastened thereto to be moved with multiple degrees of freedom for desired positioning of the equipment. One joint utilizes a friction washer assembly and a preloaded torsion spring counterbalancing the weight of the equipment. The torsion spring tension is adjustable to compensate for differing weights of equipment on the one end of the arm. Another joint utilizes a friction ball joint arrangement having double concentric friction ball surfaces in an assembly that permits multiple degrees of freedom of motion and is easily removed from the remainder of the arm without disassembling the ball joint.

Abstract: A tilt apparatus allows an operator to readily change the tilt angle of a display monitor and retain the angle after it is changed. The tilt apparatus mounts vertically to the display monitor housing at the rear of the monitor's pivot point and center of gravity. The apparatus includes a piston and spring assembly which counterbalances shifting in the monitor's center of gravity during the manual tilting of the monitor to provide continuously variable adjustment throughout a predefined tilt range. The apparatus also includes frictional drag means to compensate for nonlinear changes in the center of gravity of the monitor.

Abstract: A tilt apparatus allows an operator to readily change the tilt angle of a display monitor and retain the angle after it is changed. The tilt apparatus mounts vertically to the display monitor housing at the rear of the monitor's pivot point and center of gravity. The apparatus includes a piston and spring assembly which counterbalances shifting in the monitor's center of gravity during the manual tilting of the monitor to provide continuously variable adjustment throughout a predefined tilt range. The apparatus also includes frictional drag means to compensate for nonlinear changes in the center of gravity of the monitor.

Abstract: A mounting arm is disclosed on one end of which a piece of electronic or other equipment is mounted and the other end of which is detachably fastened to the edge of a supporting surface. The arm has three moving joints that permit the equipment fastened thereto to be moved with multiple degrees of freedom for desired positioning of the equipment. One joint utilizes a friction washer assembly and a preloaded torsion spring counterbalancing the weight of the equipment. The torsion spring tension is adjustable to compensate for differing weights of equipment on the one end of the arm. Another joint utilizes a friction ball joint arrangement having double concentric friction ball surfaces in an assembly that permits multiple degrees of freedom of motion and is easily removed from the remainder of the arm without disassembling the ball joint.