Abstract: The present invention concerns a sensor device (1) comprising a transducer (3) adapted to generate a magnetic field (MF), the sensor device (1) is configured to measure a beating gap (G) between a first (5) and a second (7) refining disc of a refiner apparatus (9) and is configured to be mounted in the first refining disc (5), the sensor device (1) comprises a magnetic pole (13), a coil assembly (15) and a measuring head (11?), which measuring head (11?) is configured to be set in calibration position relative to the second refining disc (7) for calibration of the sensor device (1). The measuring head (11?) comprises an outer end (10?) made of a non-magnetic material configured to be positioned in abutment with the second refining disc (7) in a calibration sequence. The present invention also concerns a method of calibration of said sensor device (1).

Abstract: The present invention regards a refiner plate segment (1) for a disc-type refiner apparatus (30), adapted to grind a saturated cellulosic material (M) in a refining gap (17) defined by opposed discs (20) during use of the apparatus (30), the material being moved from a refiner inlet opening (21) towards an outer edge (7) of the segment (1). The outer edge (7) of the segment (1) comprises a barrier arrangement (15) to increase the pressure in the refining gap (17) for retaining the liquid phase out to said outer edge (7). The present invention also regards a method of refining a saturated cellulosic material (M) in a refining gap (17) defined by two opposed discs (20) of a disc arrangement.

Abstract: The present invention regards a refiner plate segment (1) for a disc-type refiner apparatus (30), adapted to grind a saturated cellulosic material (M) in a refining gap (17) defined by opposed discs (20) during use of the apparatus (30), the material being moved from a refiner inlet opening (21) towards an outer edge (7) of the segment (1). The outer edge (7) of the segment (1) comprises a barrier arrangement (15) to increase the pressure in the refining gap (17) for retaining the liquid phase out to said outer edge (7). The present invention also regards a method of refining a saturated cellulosic material (M) in a refining gap (17) defined by two opposed discs (20) of a disc arrangement.

Abstract: The invention regards a measuring device, comprising a conductor body (7), for detecting the degree of fiber concentration and/or steam point (SP) of a fiber pad (33) being pulped, during use of the device (3), in a grinding gap (15) between refiner discs (11, 13) of a refiner (1). The conductor body (7) exhibits a first electric contact surface (17) adapted to provide electrical contact with a second electric contact surface (19) for transferring an electric current via the fiber pad (33) material. The invention also regards a method for detecting the degree of fiber concentration and/or steam point (SP) of a fiber pad (33). The method comprises the steps of mounting of the conductor body (7) to one of the refiner discs (13), grinding the fiber pad (33) material between the refiner discs (11, 13), detecting alteration of the conductivity and/or electrical resistivity of the fiber pad (33) material, and adjusting inflow of water and/or fiber material from said detected alteration.

Abstract: The invention shows s system (1) and a method for registering a collection of refuses from a refuse bin (19) to a refuse collection lorry (3). The refuse bin is provided with an information carrier (21) which is adapted to send information upon reception of an electromagnetic signal. An interrogator (9) and a registering unit (4) are provided on a holder (15), which is attachable to a person (23) who collects the refuse. The interrogator (9) is adapted to send an electromagnetic signal and to receive information from the information carrier (21). The registering unit (4) is connected to the interrogator (9) and is able to register information received from the interrogator (9).

Abstract: The invention relates to a sensor (6) for measuring the distance between a stator and a rotor, which sensor is of the magnetic type and has a sensor body (8) to which is attached a sensor tip (10), The tip of the sensor (10) is connected to the sensor body (8) by a fixing arrangement (14) that has a locking device (16) that interacts with engaging devices (24) and a spring arrangement (34). The locking device (16) is pressed towards an attaching position (A) by the action of a spring force F1 exerted by means of the spring arrangement (34) against the engaging device (24), fixing the sensor body (8) and the tip of the sensor (10) in relation to each other. By the application of a force F2 on the sensor body (8) that is greater than the spring force F1, it is possible to move the sensor body and the tip of the sensor to a releasing position (D), releasing them in relation to each other.

Abstract: The present invention relates to a measuring device and a method for measuring the thickness of at least one layer of a moving strip. The measuring device comprises a transmitter body, which is axially movable within a transmitter housing and has a sensor head, projecting from the transmitter housing and designed to rest against the layer via a gas cushion, and an upper portion, extending into a chamber delimited within the transmitter housing. The transmitter housing is provided with at least one port for the supply of gas, which, in part, forms the said gas cushion and, in part, flows into the chamber. The measuring device is characterized in that the transmitter housing is provided with a restrictor for evacuating gas from the chamber. The method comprises the step of measuring the thickness of the layer by means of a measuring device, the restrictor being adjusted in such a way that the gas cushion exerts a pressure against the layer equivalent to a weight of 0-65 g/cm2.

Abstract: A method for measuring the degree of fiber concentration in a pulp in a machine, in particular a refiner for the manufacture of paper pulp, which machine includes a stator and an opposing rotor, which form a grinding gap for the pulp. The stator is provided with at least one sensor device, designed to interact with a rotor surface and including an impedance meter body with a sensor surface which impedance meter body is mounted in the stator in such a way that it can move axially. Measurements of the impedance between the rotor surface and the sensor surface are carried out during an axial movement of the impedance meter body and the measured impedance differences are utilized together with the size of the movement to determine the dielectric constant of the pulp, from which the degree of fiber concentration in the pulp is derived.

Abstract: A sensor device for measuring distance between a stator and a rotor in a machine is of the magnetic type and is intended to be mounted in the stator in order to interact with an opposing surface on the rotor. A sensor body (10) can be moved axially in a housing (11) mounted in the stator by means of an operating mechanism (13) and has a stop (16) at a predetermined distance (e) from its end surface designed to interact with a corresponding stop (17) inside the housing. This distance (e) exceeds the distance (d) between the stop (17) in the hosing and the end of the sensor body (10) by a predetermined distance (c) when the sensor body is in its normal measuring position. These stops (16, 17) make possible a particularly accurate calibration of the sensor device.

Abstract: A transducer (10) for distance measurement, especially between a stator and a rotor in a refiner for paper pulp production, in which the transducer is of the magnetic type and has a tubular casing (17), the one end of which forms a measuring head (14), in which a measuring pole (15) is fitted in a holder (16) which is mounted in the end of the casing (17) and seals this. The holder (16), with a first portion (22) of its axial length, reaches beyond the end of the casing. This first portion (22) and the measuring pole (15) are intended to be able to be worn away to a smaller axial length during use of the transducer, whilst the length of the casing is maintained.

Abstract: During measurement by means of a measurement arrangement (4) in which a sensor head (7) is axially movable in a sensor housing (6) and is intended, in the measurement position, to rest against a measured object (2) via an air cushion, the orientation of the sensor head in the sensor housing is monitored. When the orientation of the sensor housing deviates by a predetermined value from the normal, the measurement arrangement is temporarily moved a distance away from the measured object and is then returned to the measurement position again for continued measurement, with the sensor head now in the normal position relative to the sensor housing. In such a measurement arrangement, a monitoring device (24) is provided to automatically produce the stated movement of the measurement arrangement.

Abstract: A transducer (10) for distance measurement, especially between a stator and a rotor in a refiner for paper pulp production, in which the transducer is of the magnetic type and has a tubular casing (17), the one end of which forms a measuring head (14), in which a measuring pole (15) is fitted in a holder (16) which is mounted in the end of the casing (17) and seals this. The holder (16), with a first portion (22) of its axial length, reaches beyond the end of the casing. This first portion (22) and the measuring pole (15) are intended to be able to be worn away to a smaller axial length during use of the transducer, whilst the length of the casing is maintained.

Abstract: During measurement by means of a measurement arrangement (4) in which a sensor head (7) is axially movable in a sensor housing (6) and is intended, in the measurement position, to rest against a measured object (2) via an air cushion, the orientation of the sensor head in the sensor housing is monitored. When the orientation of the sensor housing deviates by a predetermined value from the normal, the measurement arrangement is temporarily moved a distance away from the measured object and is then returned to the measurement position agains for continued measurement, with the sensor head now in the normal position relative to the sensor housing. In such a measurement arrangement, a monitoring device (24) is provided to automatically produce the stated movement of the measurement arrangement.

Abstract: A measuring device (1) has a measuring housing (5) in which a measuring head (6) is movably supported, the measuring housing having at least one connection (13) for the supply of pressurized air for supporting by air the measuring head (6) in the measuring housing (5). The measuring head is designed to let out air and to generate an air cushion towards a measuring object (3). On the measuring head (6) there is provided at least one guide element (20) that is extending axially and protrudes into a chamber (12) in the measuring housing (5), the guide element gliding in and being supported by air in a channel (21) in a guide part (15), which forms an end wall to the chamber (12). Also a shaft (16) included in the measuring head extends through and is supported by air in the guide part (15).

Abstract: A measuring device (1) has a measuring housing (5) in which a measuring head (6) is movably supported, the measuring housing having at least one connection (13) for the supply of pressurized air for supporting by air the measuring head (6) in the measuring housing (5). The measuring head is designed to let out air and to generate an air cushion towards a measuring object (3). On the measuring head (6) there is provided at least one guide element (20) that is extending axially and protrudes into a chamber (12) in the measuring housing (5), the guide element gliding in and being supported by air in a channel (21) in a guide part (15), which forms an end wall to the chamber (12). Also a shaft (16) included in the measuring head extends through and is supported by air in the guide part (15).

Abstract: In a machine which is provided with a stator and an opposite rotor, a sensor of magnetic type, arranged in the stator, for determining the distance between the stator and the rotor can be calibrated by the sensor first being moved relative to the stator into contact with the rotor for zeroing. The sensor is then reversed a predetermined distance, after which the sensor signal can be used for determining the distance between the stator and the rotor. In an arrangement suitable for the purpose, the stator has at least one sensor of magnetic type, which is intended to interact with an opposite surface on the rotor. The sensor is mounted displaceably in the axial direction of the rotor and can be brought into contact with the rotor.

Abstract: The object of this invention is an element, such as a rudder, and aircraft wing, a boat keel, a hydrofoil or an airfoil or the like, which is adapted to move through water or air and which is so designed that the water or the air is allowed to enter at the upstream edge of the element into and through a hollow space within said element and to leave said element at the trailing edge thereof, said hollow space within said element being divided into two halves by a central longitudinal partition (6) within said element, such that said element on either said of the said central partition (6) has a flow gap which, optionally, is divided into parallel passages by transverse partitions (4a, 4b, 5a-5c), the arrangement being such that the flow of water or air through and out of the gap between the central partition (6) and that side of the element which, in response to the angular deflection or profile, forms the suction side of said element, will be substantially larger than through the other gap.