Abstract: An inner shell has a first part of a lug-notch arrangement, which first part is arranged to co-operate with a second part of the arrangement to prevent rotation of the inner shell relative to a crushing head. The inner shell has a contact surface in its upper portion and is arranged to be pressed towards the lower portion of the crushing head by a pressing force which is obtained by tightening at least two threaded bolts, which are arranged in the upper portion of the crushing head such that their longitudinal direction is substantially parallel to the symmetry axis of the crushing head.

Abstract: A gyratory crusher includes a crushing head on which a first crushing shell is mounted, and a frame on which a second crushing shell is mounted. The second crushing shell defines, together with the first crushing shell, a crushing gap. The gyratory crusher includes a space adapted to hold a liquid. The space is defined by a piston and a cylinder, any one of the piston and the cylinder being formed at least partly of a substantially vertical shaft around which the crushing head is arranged. The space is adapted to form, together with the liquid, a cushion, thereby enabling the cushion to serve as a thrust bearing and transmit vertical forces from the crushing head to the frame.

Abstract: The invention relates to an arrangement and a method for fastening panel-like elements to a vehicle. The arrangement incorporates a first part of a velcro® fastening the latter consisting of a hook part and a felt part which is attached to the panel element, and a second part of the velcro fastening which is attached to the part of the vehicle which is intended to support the panel element. The portion of the surface of the panel element where the first part of the velcro® fastening is arranged is situated centrally to, but at a predetermined distance from, the portion of the surface of the vehicle part where the second part of the velcro® fastening is arranged. In fastening a panel element, e.g. a wearing layer, to a vehicle, at least a first part of the velcro® fastening is attached to the panel element before the latter is placed in the vehicle.

Abstract: In an electric fence energizer there is an exterior earth connection such as an earth connection post (16). The electric fence energizer comprises in the conventional way a transformer (T) having a primary winding (L.sub.1) and a secondary winding (L.sub.2), one exterior terminal (9) of which is connected to the conductor (17) in the electric fence and the other exterior terminal (11) is connected to the earth connection, high voltage pulses being induced over the secondary winding (L.sub.2) when voltage pulses are applied over the primary winding (L.sub.1). For a determination of the quality of the earth connection, the voltage over a small part of the secondary winding (L.sub.2) is obtained capacitively by means of an extra winding (L.sub.3) in the transformer (T). For an evaluation of this voltage, it is connected, only for a determined polarity, to a charging circuit for a capacitor (C.sub.2), which is discharged over a known resistor (R.sub.2, R.sub.3). The voltage (V.sub.21) over this capacitor (C.sub.

Abstract: An electric fence energizer is operated by an alternating current and has two storage capacitors (C.sub.1, C.sub.2), which are charged by a charging circuit (7) to a high voltage. The storage capacitors (C.sub.1, C.sub.2) are discharged through separate primary windings (L.sub.1, L.sub.2) in a transformer (T) and the secondary winding (L.sub.3) of the transformer is connected to the electric fence. The discharging processes are controlled by separate discharging circuits (R.sub.1, T.sub.y1 ; T.sub.y3 and T.sub.y3 respectively), so that for light loads only one of the storage capacitors (C.sub.1) is discharged, and for heavy loads also the other one (C.sub.2) is discharged starting a short time after the start of the discharging of the first one and during the same discharge cycle. Sense circuits (L.sub.2, R.sub.8, R.sub.9, C.sub.3, R.sub.10, R.sub.11, R.sub.12, T.sub.4, R.sub.13) provide signals PCHL; PPUL) to a microprocessor (7) and they represent the load on the transformer (T).

Abstract: A device for automatic testing of electrical high voltage lines is described, comprising a support (1), a driving wheel (2) for lying against the line (3) with a remotely controlled device (4) and a means for remotely controlled automatic measurement of physical data at the joint (11) in question). Means for the transfer of measurement data to a receiver is provided along with a shielding means (15) to shield the transfer means. The device is characterized primarily in that it is provided with a guide rails means (7,8,9) for steering of the device, carried by a lifting means such as a helicopter or crane for lying the driving wheel against a line. Physical measurement may comprise contacting as well as non-contacting measurement in the vicinity of and at a joint in question. To compensate for voltages which may be induced in the measuring means, a compensation circuit is provided. The compensation circuit may be provided with a flat coil which may be rotated by a stepper motor or the like.

Abstract: An electric fence energizing apparatus is described in which a chargeable capacitor is connected to the primary winding of a transformer. The secondary winding of the fence is connected to receive pulses at the discharge of the capacitor, the discharge time serving as a measure of the voltage of the corresponding output pulse on the fence. The primary winding of the transformer is divided into two oppositely connected windings. The capacitor is arranged to be discharged through a first one of the primary windings. A voltage determined by the discharge of the capacitor is produced over the second of the primary windings during the discharge process. A measuring unit measure the time of the duration of this voltage over the second winding determined by the discharge of the capacitor.

Abstract: A lock nut includes a nut body (10) having outer (12) and inner (14) circumferential surfaces. The inner surface (14) defines a screw-threaded axial through-hole that can be mounted on an externally threaded shaft. A plurality of blind bores (18) is formed in the nut body (10), each blind bore extending radially inwardly from the outer surface. Those blind bores (18) terminate short of the inner surface so that a plastically displaceable part (20) of the nut body remains between each blind bore and the inner surface to close-off a radial inner end of the blind bore (18). Locking screws (30) are mounted in respective blind bores (18). By tightening the locking screws (30), the displaceable portions (20) are pressed against the externally threaded shaft to frictionally grip the shaft.

Abstract: A sheet metal profile member (22) for the construction of a frame structure for a box-shaped casing for ventilation or air treatment devices. The sheet metal profile member has a substantially square cross-section with an internal cavity (23) and a guide flange (44), which is retracted in the region of an external corner edge (22a), so as to enable interconnection of adjoining frame structures both vertically and horizontally by means of a guide engagement rod (20).

Abstract: A screening apparatus is provided having a plurality of axially aligned discs or rings which are lined up one behind the other, spaced a predetermined distance from each other and rotate as a single unit about a central longitudinal axis. A large central aperture is formed through each of the discs to form a tubular, drum type structure within which material to be separated is placed. Upon rotation of the tubular structure, acceptable material flows through the slots between adjacent discs while over-size material exits one open end of the tubular structure.

Abstract: A frame structure for the construction of a box-shaped casing, in particular for air treatment devices. The frame structure comprises straight profile members (22), on the one hand, and corner elements (50,52) with three mutually perpendicular protrusions, each being connectable to one of said profile elements, on the other hand. Each corner element consists of two parts, namely an external part (50) including the external portions (50a, 50b,50c) of said protrusions and an internal part (52) including the internal portions (52a,52b,52c) of the protrusions. Said protrusion portions together form a closed cross-section fitting internally into the likewise closed cross-section of the profile members (b 22). The profile members can be slid onto the corner element protrusions while simultaneously securing the external and internal corner element parts (50,52).

Abstract: Fines are separated from pin chips and a system in which a mixture of fines and pin chips is introduced onto a rotating disk which imparts centrifugal forces thereto for separation. In a first embodiment, the fines and the pin chips are propelled over different length paths to fall into separate collectors, the fines collector entraining the fines into an air stream for disposal. In this embodiment, the rotor comprises a rotary disk having a smooth upper surface, while in a second embodiment the upper surface is provided with a plurality of vanes on the upper surface thereof. In a third embodiment, the rotary disk is provided with a plurality of grooves for directing the fines over the periphery of the disk into its collector. In a fourth embodiment, the rotary disk is provided with a plurality of generally radial slots with vanes beneath in order to provide a classification between fines and pin chips.

Abstract: A roller ski comprising a foot plate (6) supported by a forward and a rear pneumatic rubber wheel (7, 8) and provided with rigid supporting members (9) arranged to support the user's leg laterally at a level between the foot and the knee and at the same time to allow the leg to move freely in the longitudinal direction of the roller ski.