Abstract: A device for controlling a rotating-piston machine in which inner and outer rotors rotate at unequal speeds and profiled teeth thereon form gaps to define working chambers which move, with change of volume, from an inlet region to an outlet region of the machine. The device comprises a body having a feed channel for a working fluid, a plurality of supply channels which open into the inlet region and two rotary slide valves for controlling communication between the feed channel and the supply channels to fill the working chambers during development of suction therein upon rotation of the rotors. The body has two round cutouts each containing a respective rotary slide valve. One slide valve controls supply of fluid at the beginning of development of suction in each working chamber whereas the other slide valve controls supply fluid at the end of development of suction in each working chamber. Each cut-out is connected to the feed channel and to respective associated pluralities of supply channels.

Abstract: The flat knitting machine (10) has, on the rear side of its machine body (12), bobbin holders for additional bobbins (19), the yarn of which can be processed on the same flat knitting machine or on an adjacent flat knitting machine (10'). The additional bobbin holders can be arranged on individually removable rear-wall panels of the flat knitting machine (10) (FIG. 1).

Abstract: Compounds of formula I ##STR1## wherein R.sup.1 is hydrogen or a protecting group,R.sup.2 is --CH.dbd.CR.sub.2.sup.4 or --C.tbd.CR.sup.4,R.sup.4 is hydrogen or halogen,R.sup.3 is hydrogen, lower alkyl or lower alkoxyalkyl,R.sup.A is, inter alia, hydrogen, OR.sup.7, lower alkyl, which optionally is substituted with aryl, lower alkoxy or NR5R6,R.sup.5 and R.sup.6 can be the same or different and in each case is hydrogen, lower alkyl or together with the nitrogen atom a 5-6 member ring, which can contain another heteroatom,R.sup.7 is lower alkyl, optionally substituted aryl or aralkyl, andeach compound can contain one or more R.sup.A radicals which are not hydrogen, have valuable pharmacological properties.

Abstract: An ampoule assembly for the growth of single crystal materials is particularly adapted for a micro-gravity environment and includes a plurality of centering rods for spacing a crystalline material from the inner surface of an ampoule. The centering rods are spaced relative to one another to form a dopant vapor passageway to provide uniform stoichiometry of the crystal upon melting and resolidification. Minimum contact between ampoule and the crystalline material ensures greater purity of the crystalline material when the material is transformed into a single crystal.

Abstract: The subject array structure provides a large current mirror array which generates a plurality of substantially equal output currents from high impedance sources in response to at least one input control current. This array structure reduces the control current deviation problem of prior art current mirror circuits.

Abstract: An apparatus known as a common module for converting a thermal scene into a visible image. The apparatus comprises an infrared objective, a pivotal mirror which can be pivoted back and forth about an axis, an infrared detection array comprising a plurality of detectors, and a linear display array which is connected to the infrared detection array via an amplifier arrangement. The radiation emitted by the display array is imaged in a plane of observation, preferably via the back of the pivotal mirror and via at least one diverting mirror. For omnidirectional viewing in the horizontal and the vertical direction the infrared objective, the pivotal mirror, the detector array and the display array are combined to form a constructional unit, which is arranged to be pivotable about a horizontal and about a vertical axis. Between the diverting mirror and the eyepiece an erecting prism is arranged. The erecting prism is rotated in conformity with the rotation of the constructional unit.

Abstract: The subject of the invention is a sheet cleat, especially for sailboats, whose essential elements are movable gripping jaws which form a gripping gap between them, and whose surface parts cooperating with the sheet consist of rollers having a serration and having a rotation-symmetrical envelope surface. The rollers are freely rotatable about axes which are parallel to the plane of movement of the gripping jaws. The sheet is pressed into the gripping gap with rotation and spreading apart of the rollers, and there it is held fast positively and frictionally, but is easily releasable. In the direction of the tension on the sheet under the usual stress, a locking action takes place; in the opposite direction the sheet can be easily retightened. Reduction of wear and tear on the sheet is the additional effect. A plurality of roller pairs can also be present. An adjustable bearing surface and a likewise adjustable guiding means are provided for the sheet as possible accessory devices.

Abstract: Improved current sources which provide n output units of current responsive to m input units of current are constructed by connecting (m+n).sup.2 transistors in a square array configuration, controlled by (m+n) control devices. The array contains (m+n) columns each of which conducts a current the magnitude of which is desired to equal the magnitude of the current flowing in every other column, and has a maximum deviation only in proportion to [1/(1+.beta.)].sup.4 where .beta. is the common emitter current gain of the transistors.

Abstract: A removable frame for reduction of axle loads for heavy vehicles is disclosed herein. The frame includes a pair of lever arms pivoted to each other at one end with adjustable biasing means between the free ends of the lever arms. One of the lever arms has at least one wheel supported thereon while the other arm is rotatably connected to a support member adapted to be attached to a vehicle frame. A centering mechanism normally maintains the lever arm in a predetermined position on the support member and accommodates rotation with respect to each other.

Abstract: A closed water/glycol solar heating system for preheating a fluid so as to reduce energy requirements in bringing said fluid up to a desired temperature and holding same, said system including a solar collector having a flexible dome.

Abstract: A removable frame for reduction of axle loads for heavy vehicles is disclosed herein. The frame includes a pair of lever arms pivoted to each other at one end with adjustable biasing means between the free ends of the lever arms. One of the lever arms has at least one wheel supported thereon while the other arm is rotatably connected to a support member adapted to be attached to a vehicle frame. A centering mechanism normally maintains the lever arm in a predetermined position on the support member and accommodates rotation with respect to each other.