Abstract: An apparatus for welding webs of synthetic thermoplastic material as they move around a deflecting roller comprises an elongate housing, which is movable toward the deflecting roller to assume a position in which said housing is approximately concentric to said roller and closely surrounds said roller around a part of its periphery, and said housing is provided with at least one longitudinally extending hot-air duct, which is curved in the same sense as the housing and is provided with an inlet for receiving flowing hot air and is formed with a plurality of outlet bores or gaps in that wall of the housing which faces the deflecting roller.

Abstract: A hovercraft is described having a fan mounted to rotate about a vertical axis. The airflow from the fan is directed to the skirt to create lift and to horizontally aligned outlets to positively propel the craft in both forward and reverse directions and, if necessary, provide a braking force. A valve arrangement is provided to alter the relative airflow between the different horizontally aligned outlets.

Abstract: Disclosed is a batten setting apparatus for laying and mounting batten strips in a desired distance to mounted batten strips on rafters or similar undergound. The apparatus includes a framework having a first row of abutment elements and a first row of pressure elements coupled to a motor for clamping a batten strip to be mounted there between. A second row of abutment elements is provided for positioning the apparatus at a mounted batten strip. The distance between the first row and the second row of abutment elements determines the distance of the batten strip to be mounted from the mounted batten strip.

Abstract: A key switch comprising a bottom shell connected with an upper shell for holding a spring plate, a switching mechanism which is comprised of two conducting plates respectively connected to the two opposite terminals of a circuit, and a spring supported key cap, wherein said upper shell has two retaining grooves separated by a projecting strip for holding said two conducting plates respectively in place. The first conducting plate comprises a trigger frame obliquely disposed toward the spring plate and a contact end extending backward from said trigger frame. Pressing on the key cap causes the spring plate to move the trigger frame to carry its contact end to electrically contact the second conducting plate forming into a closed circuit.

Abstract: A fractional-N synthesizer including a phase locked loop comprising: a voltage controlled oscillator (4) providing a loop output signal, the output signal being coupled via an N variable divider (6) to a first input of a phase or frequency detector (8); a reference frequency source coupled to a second input of the phase or frequency detector (8), the detector providing at an output a control signal, in dependence upon a comparision between the signals applied to the first and second inputs, for application to a control input of the voltage controlled oscillator (4); and means for setting the division ratio (N) of the variable divider (6) in response to a frequency data word, including interpolator means (50) for periodically varying at least the LSB of the frequency data word, the interpolator means (50) comprising an input for receiving said LSB, a combiner means (70, 80) for comparing the LSB with a feedback signal, and a quantizer circuit (72, 84) and a filter circuit (74, 82) providing a predetermined del

Abstract: A cylinder head for a double overhead camshaft engine, with a plurality of intake valves and a plurality of exhaust valves for each cylinder, is covered by a cylinder head cover to support, for rotation, intake and exhaust camshafts. A hermetically sealed chamber, formed between the cylinder head and head cover as an oil jacket, is divided into two chambers, enclosing major parts of the intake and exhaust camshafts, respectively, which are in communication with each other near first ends of the chambers. An outlet hole is formed in the cylinder head cover so as to permit blow-by gas to flow out of the chamber. A cover, covering a gear train for operationally coupling the intake and exhaust camshafts, is bolted to one end of the head cover at several points around the gear train and to the cylinder head.

Abstract: Mixing device for powdered, granular and/or paste materials, having a conical mixing tank (1) with vertical axis which narrows towards the bottom, and in said mixing tank at least one mixing screw (2), which through drive units disposed outside the mixing tank (1), by means of a transmission arm (15) to be rotated in a horizontal plane, can rotate about its own axis and can revolve along the wall of the mixing tank, the shaft of the mixing screw (2) at the top end being provided with a gear wheel (3) which meshes with a gear wheel (4) with vertical shaft, which has a smaller diameter than the gear wheel (3) on the mixing screw (2) whereby the gear wheel (4) with vertical shaft is connected by means of a belt connection (7) or the like in the arm (15) to a central vertical shaft (9) which by means of a reducing transmission (10, 11, 12) is coupled to the drive unit (13) for rotation of the mixing screw (2).

Abstract: A vertically elongated and oriented adapter including upper and lower ends is provided for removably indexed mounting of the upper end thereof from the lower end of a sewing machine high pressure foot mounting shank and the lower end of the adapter includes structure for predetermined indexed removable mounting of the upper end of a low shank pressure foot therefrom, whereby a sewing machine equipped with a high pressure foot mounting shank may be used conjunction with more readily available and varied types of low shank pressure feet. In addition, the adapter is constructed in a manner such that the associated low shank pressure foot is offset forwardly and laterally with respect to the associated high pressure foot mounting shank.

Abstract: An electromagnetic detection and identification system for detecting and identifying a plurality of responders (improved transponders), each containing a unique code, and simultaneously present in one and the same interrogation field generated by a transmitter/receiver.

Abstract: In a liquid crystal display, each pixel is formed of four separately energizable areas which have relative light outputs in the ratio 1:2:4:8 respectively, thereby allowing a range of 16 grey levels to be achieved by appropriate selection of areas. Each of the areas has a number of segments, which are spaced-apart but concentrically arranged, in order to have the same average position, so that different bit patterns cause the pixel to change brightness only, without any apparent positional change.

Abstract: Disclosed is an outside rear-view for a vehicle which has a pedestal to be mounted to a body of the vehicle and a mirror housing held to the pedestal. An electric motor is provided for tilting the mirror housing relative to the pedestal. The electric motor is mounted to the inner surface of an assembly plate bordering the pedestal towards the body, and the drive shaft of the electric motor is linked preferably through a transmission gear and/or a clutch and through a cam to a rigid transmission member coupled to the mirror housing. Alternatively, the drive motor may be mounted within the interior of the mirror housing, the transmission member coupled to the cam of the driving motor then may be coupled to the pedestal. Thereby the advantages are obtained that the electric driving motor does not project outwardly from the normal outer conture of an outside rear-view mirror and may be utilized for any modes of mounting of the mirror housing to the pedestal.

Abstract: A display tag, of sheet material, for use on a forwardly extending support hook is provided. It has a mounting portion on one end for securing it to the proximal end of a support hook, and an elongate portion adjacent the mounting portion for extending forwardly of the hook to present product information at a distal end of the elongate portion. The tag has one or more flaps or tabs which are die-cut therein and provided with bar receiving cut-outs for receiving a forwardly extending part of a support hook therein. In one embodiment, four tabs are provided on the mounting portion of the tag for receiving mutually perpendicular extending bars of a bi-directional wire rack therein. The bar receiving cut-outs in the tabs are circular or elongate in shape and stabilize the tag in the longitudinal direction on the support hook.

Abstract: A rotary lawn mower blade is provided with opposite end dependingly supported rake springs. Each of the springs comprises a closed coil spring body whose upper end is removably supported from the underside of the corresponding rotary mower blade end and the lower convolution of each coil spring body includes a downwardly directed vertical spring tine or finger. The mower blade incorporates a pair of elongated opposite end blade end sections including remote and adjacent ends with the adjacent ends thereof disposed in end overlapped engagement with each other and the adjacent ends include meshed projections and recesses spaced longitudinally therealong. The adjacent ends are longitudinally slotted and a threaded shank type fastener is passed upwardly through the slots and may be threaded in a blind bore formed in the lower end of the vertical engine shaft of a rotary mower.

Abstract: A device for the operation of adjustment, fastening or the like elements of ski shoes and ski bindings comprises a small plate (5) adapted to be used as a screw driver, and which has been attached to a strap (3), belt or the like for the locking or holding together of the upper end of the ski shoe upper, for instance the collar (2).

Abstract: The subject is the preparation of chlorotrifluoroethylene (CTFE) by a known reaction of 1,1,2-trichloro-1,2,2,-trifluoroethane (R-113) with zinc powder dispersed in an alcohol such as methanol, and the object of the invention is industrially easily and smoothly carrying out the reaction in a continuous manner. The disclosed process uses a plurality of stirred tank reactors, usually two or three reactors, which are connected to each other in a series arrangement by overflow pipes. A dispersion of zinc powder in an alcohol is continuously fed into the first reactor only so as to allow the dispersion to overflow into the next reactor and then into the remaining reactor(s) in turn, and R-113 is continuously fed into each reactor. CTFE is continuously discharged from each reactor, while zinc in the initially fed dispersion is gradually converted into zinc chloride. In the last reactor the conversion of zinc reaches 90% or above.

Abstract: A continuous electrolytic deposit of constant thickness is formed on a moving substrate (2) constituting a cathode passing in adjacent spaced relation to an anode (3) to provide a narrow electrolysis gap therebetween. The anode consists of a plurality of anode modules (3) which are supported mechanically independent of each other. The electrical and hydraulic circuits respectively feeding the anode modules include flexible sealing members (8, 11, 12, 14) between the fixed sources of current and electrolyte respectively and the anode modules. The anode modules are provided with supports (4, 9, 10) whereby they are supported on the cathode (2) or on a surface (1) directly linked to the cathode. The support for at least one anode module (3) may be adjustable for adjusting the distance between the anode module and the cathode. The supports (4) are shoes or rollers, for example, which may be mounted at the ends of arms (9, 10) supporting the anode modules.

Abstract: A stepping motor for a timepiece has a coil (12), a single magnetic circuit, two stator pole pieces (10a, 10b), and two rotors in the form of axially magnetized permanent-magnet disks (13, 14). The two rotors are coaxial and disposed one on each side of a plane defined by the stator pole pieces defining gaps of different widths (.delta.1, .delta.2) between adjacent facing surfaces of said respective disks and said stator pole pieces.

Abstract: An intake system delivers air into cylinders of an internal combustion engine which are divided into two groups. The cylinders in each group are arranged in one and the same row so that adjoining cylinders in each row do not fire one after another. The intake system has conflux chambers for the cylinder rows, connected to the cylinders by intake passages, and also interconnected to each other by a communication passage having a valve. First and second resonant passages are each connected at one end to the respective conflux chambers and are joined together to communicate with each other at another end, opposite to the one end, in a location at which a throttle body is located. The first resonant passage has a connection point with one conflux chamber closer to an interconnection between both the conflux chambers than a connection point in a lengthwise direction of the second resonant passage with another conflux chamber.