Abstract: An improved shoulder strength adduction device is provided for use in determining the strength of a person's shoulder musculature. The device comprises a pair of hand grips connected by pivotal scissors frames to a support bar and a load bar, with a force gauge unit being mounted between the support and load bars. Exertion of manual adduction force to move the hand grips toward each other is effective to urge the support and load bars toward each other, whereby the adduction force can be detected and displayed by the force gauge unit to provide a direct reading of shoulder or upper body strength. The device includes a variety of mechanical improvements designed to enhance ease of use while achieving increased force indicating accuracy.

Abstract: In a chemical vapor deposition apparatus for coating semiconductor wafers, the wafer is held face down in the reaction chamber. A radiant heat source above the wafer and outside the reaction chamber. The wafer is held on a ring chuck by means of a retractable clamp heats the wafer from its backside to a temperature in excess of 1000.degree. C. rapidly. The radiant heat source includes cylindrical lamps placed in a radial pattern to improve heating uniformity. In the selective tungsten process the temperature of the wafer is raised from ambient to about 600.degree. C. while flowing process gases. At the upper temperature range the heating source can be rapidly cycled on and off to improve the uniformity of coating.

Abstract: A chemical vapor deposition apparatus includes a gas mixing chamber and a water-cooled reaction chamber with adjustable water-cooled baffle between them. A wafer is clamped face down to a chuck and an inert gas such as helium is forced between the chuck and the wafer to insure proper heat conduction from chuck to wafer. The chuck can be radiantly heated from above and operated in a plasma-enhanced mode. A wafer loading apparatus driven by a computer is isolated by a loadlock during deposition to enhance cleanliness. The chamber can be plasma cleaned to reduce downtime.

Abstract: The device provides an indication of the tension in a rope or cable and includes a rigid frame mounting first and second guide pulleys at opposite ends in tandem relationship. A central pulley is provided in the frame and the rope or cable is passed under the first guide pulley, over the central pulley and thence under the second guide pulley. The entrance and exit angle of the rope or cable over the central pulley is an angle less than 180.degree. so that when a tension is placed on the rope, a downward force is exerted on the central pulley which force in turn is measured by a load cell to provide an indication of the tension in the rope. A manually operable locking and releasing structure cooperates with the mounting means for the first and second guide pulleys in such a manner as to enable simple manual removal of the guide pulleys from the frame so that the rope or cable can be positioned in the device without having access to the ends of the rope.

Abstract: The device includes a rigid frame supporting tandem pulleys for engaging spaced points on a rope or cable in which a predetermined tension when reached is to be indicated. The center of the rope between the pulleys is laterally displaced from a tangent line between the spaced points on the pulleys and secured to a bending beam so that when tension is applied to the rope the secured center portion will tend to move into alignment with the engagement points on the pulley thereby deflecting the beam. A microswitch secured to the frame is arranged to be engaged when the beam has been deflected a predetermined amount thereby indicating when a predetermined tension has been reached.

Abstract: A mandrel is provided with a lifting eye at its upper end for coupling to a hoist and diametrically opposite extending lifting lugs at its lower end. A socket member having a diametrically elongated bore passing completely through the socket member is arranged to be secured in the top surface of a weight to be lifted with the top surface of the socket flush with the top surface of the weight. The socket includes a transverse channel on its bottom end extending at right angles to the diametric elongation of the socket bore. The mandrel can be lowered through the bore with the lugs passing through the diametrically opposite elongated portions and thence rotated 90.degree. after the lugs clear the bottom of the socket, the lugs then being received in the transverse channel. Springs serve to bias the mandrel and lugs upwardly relative to the socket to assure proper seating.

Abstract: The extensometer has first and second gripping portions on spaced members designed to be applied to a specimen by using only one hand. Changes in the length of the specimen are indicated by an electrical signal derived from a flexure strain gage arrangement in one of the members against which a probe is urged by forces on the other member. The coupling of the probe to the other member is through a spring biasing arrangement such that the biasing force can be changed so that the strain gage flexure movements can be made constant for different percentage elongations to be measured.