Abstract: A microscope including a body and an optical axis reorientation device is described. The optical axis reorientation device is coupled to the body. The optical axis reorientation device includes at least two selectively adjustable mirrors and is rotatable, with respect to an optical axis of the microscope, to reorient a view of an object observed through the microscope while substantially maintaining a constant position of the microscope body.

Abstract: A microscope including a body and an optical axis reorientation device is described. The optical axis reorientation device is coupled to the body. The optical axis reorientation device includes at least two selectively adjustable mirrors and is rotatable, with respect to an optical axis of the microscope, to reorient a view of an object observed through the microscope while substantially maintaining a constant position of the microscope body.

Abstract: This application is directed to processes involving the use of nonmiscible inert liquid carriers such as halogenated hydrocarbons. The processes are applicable to mixing, agglomerating, coating, dyeing, reorientating, crystallizing, precipitating, reacting and similar types of operations. Examples of products which can be treated by these processes are foods, pharmaceuticals, detergents, fabrics and papers. The inert carrier acts as an expanded matrix to support and disperse such products to facilitate carrying out the indicated operating steps.

Abstract: A pedal drive mechanism for a are vehicle. In a preferred bicycle version, pedal lever arms Additional pivotally attached to each side of the frame near the rear wheel hub for reciprocal rotation within a limited angular sector. Downward forces exerted by a rider on the pedals are transmitted through flexible tension members on each side of the bicycle anchored either to first attachment points intermediate the ends of the lever arms or to second attachment points on the frame above the lever arms and leading around pulleys mounted at the other of the first and second points. From the pulleys each tension member leads over and around a corresponding rotary driving member that is connected through an overrunning clutch to the rear wheel. Means interconnecting the lever arms return one arm to the upper starting position while the other arm is in the downward power stroke.

Abstract: A pedal drive mechanism for a rider-powered vehicle. In a preferred bicycle version, pedal lever arms are pivotally attached to each side of the frame near the rear wheel hub for reciprocal rotation within a limited angular sector. Downward forces exerted by a rider on the pedals are transmitted through flexible tension members on each side of the bicycle anchored either to first attachment points intermediate the ends of the lever arms or to second attachment points on the frame above the lever arms and leading around pulleys mounted at the other of the first and second points. From the pulleys each tension member leads over and around a corresponding rotary driving member that is connected through an overrunning clutch to the rear wheel. Means interconnecting the lever arms return one arm to the upper starting position while the other arm is in the downward power stroke.

Abstract: An improved apparatus and method for mixing a second material into a first fluid material includes a container for the first fluid material, a motor driven centrifugal impeller, and a conduit having an outlet coaxial with and adjacent to the centrifugal impeller for feeding the second material into the center of the impeller. The impeller is located in the container of fluid material, and the improved apparatus includes means for directing a portion of the fluid from the container inward for mixing with the second material as it enters the center of the impeller and means for directing at least a portion of the mixture flowing from the impeller outward for dispersion in the fluid in the container. The apparatus preferably also includes means for recirculating a portion of the mixture from the impeller directly back for mixing with and imparting momentum to the first and second materials as they enter into the center of the impeller.

Abstract: An improved apparatus for mixing and reacting materials that include at least one liquid while simultaneously transferring heat to or from the mixture. A rotating centrifugal impeller mounted in a lower chamber of a closed reactor vessel draws the materials to be mixed from an upper chamber through a short central inlet and mixes them with high energy while impelling them between spaced blades extending outward from the eye of the impeller to a high pressure region at its circumference. The mixture then returns to the upper chamber through a plurality of elongated conduits having thin walls. For maximum heat transfer area in relation to cross-sectional flow area, each conduit is arranged with a first inner portion of annular cross section and a second, reverse flow, outer portion separated from the inner portion by a double-walled tube, the tube having passages between its double walls for circulating heat exchanging fluid.