Since the focus of an optical equipment stays on the extension of a straight line connecting the two base ends of a parallel linkage (25) and the focus (f) of the medical optical equipment (34) remains fixed at a fixed position when the parallel linkage is transformed, the medical optical (34) equipment does not need to be focused even when the parallel linkage is operated, and thereby operating t...

A sheet feeder, provided at a printing machine, comprises a pile board 2 receiving a sheet pile 1, said pile board being suspended from chains 3 and being automatically lifted such that the uppermost pile edge is in the working range of sheet separating and conveying devices (not shown), the position of said uppermost sheet edge being monitored at 5, the pile board 2 mounting pivoted boards 8, 9 b...

The rotor of the hammer breaker is fitted with ring-shaped hammers which are located with considerable clearance on the rotor bolts. Beneath the rotor (7) is an inclined or horizontal roller track with driven or non-driven transport rollers (2), in the rear zone of which and opposite to the rotor is a driven eccentric roller (4) acting as anvil. The eccentric roller consists of a roller core with ...

Besides a first gate (3) for discharging liquids, a centrifugal drum (1) has a second gate (6) for discharging the separated solids. An overflowing edge (8) provided for the solids is located at at least the same radial distance from the axis of the drum as an overflowing edge (5) for the liquids formed by the first gate (3). The length of the overflowing edge (5) of the first gate (3) and the len...

A textile yarn carrier adapted to receive a yarn tail at the base thereof without breaking the yarn tail. The yarn carrier includes a body having an outer face about which yarn may be wrapped, an inner face, and an annular face at its bottom end. A plurality of adjacent, circumferentially oriented, semielliptical depressions are formed in the bottom face of the yarn carrier. Each depression extend...

A clarifier (10) with first stage flotation and second stage filtration divides at least the lower portion of a flotation tank (12) into independent cells (54). A branched conduit (78) collects clarified water. Valves (76) control the flow of clarified water to either a clarified water ring conduit (62) or to a first filtrate/bachwash ring conduit (64) connected to a storage tank (68). High cell w...

A radially adjustable anvil roll assembly is provided for use with a die cutting cylinder of a rotary die cutting press. The adjustable anvil roll assembly comprises a shaft mounted for selective and intermittent rotation on the press, and a pair of eccentrics provided on an intermediate portion of the shaft. A hollow cylindrical sleeve is mounted for free rotation on the shaft eccentrics. Rotatin...

A cold food slicing machine having a circular cutter (6) which can be driven in a rotating manner, a stop plate (3) with an adjusting drive (4), and a trolley (7) for the sliced material has a control device (14), especially with a slice thickness memory (13) for the adjusting drive. The slice thickness value, supplemented if necessary by an additional amount and/or an actuating command for the ad...

In a guidance system for guiding an automated vehicle (2,3) around an area (18) such as a warehouse, a scanning laser beam from a source (14,15) mounted on the vehicle impinges upon reflectors (13) located round the area. Each reflector incorporates an optical code which identifies that reflector. Laser light reflected back to the vehicle from the reflectors is used to control the movement and hea...

A direct memory access (DMA) system with a single bus architecture for controlling data transfers and storage between plural digital processors and plural Input/Output devices. Limiters are included for disabling access to the bus of a processor whose access time exceeds a predetermined time interval. A time governor is included to suppress processor access to the bus when total processor access t...

A method for determining the presence of an analyte in a fluid is described along with an apparatus specifically designed to carry out the method. The method involves taking a reflectance reading from one surface (15) of an inert porous matrix (11) impregnated with a reagent that will interact with the analyte to produce a light-absorbing reaction product when the fluid being analysed is applied t...

A polyurethane emulsion is composed of an organic solvent solution of a polyurethane resin containing silicone segments and/or fluorocarbon segments as backbones and/or side chains and water emulsified in the organic solvent solution. A sheet-like porous material having a porous layer of a polyurethane resin provided on a base material is produced by using the above polyurethane emulsion to form t...

Retroreflective sheeting has been improved by a coating comprising silica and a transparent polymer selected from aliphatic polyurethanes, polyvinyl chloride copolymers having a minor amount of a comonomer containing at least one carboxylic acid or hydroxyl moiety, and acrylic polymers. Silica comprises 10-80 weight percent (10-70% in the case of polyacrylates) of the transparent protective coatin...

Rubberless tire bead assemblies (12) are disclosed, containing either a single wire element (14) or multiple wire elements (14a-14e) wound about an axis to provide a plurality of convolutions of the single wire or multiple wire elements to provide a bead hoop and shape-retaining members (22) engaging the bead hoop about the circumference of the bead hoop to retain the bead assembly in a planar con...

Process comprises polyols (1) heating (A) polyurethane, polyurethane-urea and/or polyurea plastics with (B) di- and/or poly-functional alcohols of mol. wt. 62-250, (C) water and opt. (D) other mono-, di- and/or poly-functional alcohols of mol. wt. 251-20,000 for 1 min. to 72 hrs. at 120-250 deg. C, with wt. ratio (A):(B) = (3:1)-(1:10), and then (2) at least partly removing component (B). Pref. (A...

A distributed control system including a control station that takes charge of control operation, and a remote input/output device that is connected to the control station through a remote input/output bus. In a normal state, cyclic scan transmission is carried out by using the remote input/output bus so that input/output data handled by the control station and input/output data on the remote input...

The invention relates to safety closing devices for containers of biological liquids and, particularly, for test tubes used for the drawing, transport and/or analysis of blood, of the type including an undercap and a cap, both made of a perforable material. The undercap (2) and the cap (3) each include at least a central portion (4, 6), formed by one or more parts. The central portion (4) of the u...

A method and apparatus for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer (40) controlling a laser (30) to direct the laser energy onto the powder (26) to produce a sintered mass. The computer (40) either determines or is programmed with the boundaries of the desired cross-sectional regions of the part. For eac...