Abstract: Disclosed is a method for generating a quality measure for a frequency set. The quality measure indicates the quality of the frequency set for use in a multi frequency ranging method for estimating the range to an object. The method for generating a quality measure comprises the steps of determining the smallest distance between any two range lines of a set of range lines in an N-dimensional phase space. The N-dimensional phase space comprises at least a first dimension representing a first phase difference, and a second dimension representing a second phase difference. The N-dimensional phase space has a dimension equal to the number of phase differences used by the multi frequency ranging method. The range lines represent all theoretical possible combinations of the phase differences.

Abstract: Disclosed is a method for estimating the range to an object, the method comprising: transmitting a first signal towards the object; receiving a reflected echo signal reflected from the object; and determining a measured point (MP) in an N-dimensional phase space. The range to the object is estimated by selecting a candidate range estimate from a plurality of candidate range estimates, each candidate range estimate in the unambiguous range R having an unique associated point in the N-dimensional phase space positioned on range lines, and wherein a candidate range estimate is selected dependent on the distance from its unique associated point in the N-dimensional phase space to the measured point (MP), so that a single range estimate is generated using information from at least two measured phase differences without directly averaging ambiguous range estimates.

Abstract: Linear actuator, where a reversible electric motor (20) through a transmission (21) drives a non-self-locking spindle (22), by means of which an adjustment element (24) secured against rotation can be moved axially for adjusting an element connected thereto such as a backrest section in a bed. The actuator further comprises a quick release (27) for disengagement of the adjustment element (24) from the electric motor (20) and the part of the transmission (21) extending from the electric motor (20) to the quick release (27), such that the spindle (22) is rotated under the load on the adjustment element (24). Further, the actuator comprises brake means for controlling the speed of the adjustment element (24), when the quick release (27) is activated.

Abstract: Linear actuator, where a reversible electric motor (20) through a transmission (21) drives a non-self-locking spindle (22), by means of which an adjustment element (24) secured against rotation can be moved axially for adjusting an element connected thereto such as a backrest section in a bed. The actuator further comprises a quick release (27) for disengagement of the adjustment element (24) from the electric motor (20) and the part of the transmission (21) extending from the electric motor (20) to the quick release (27), such that the spindle (22) is rotated under the load on the adjustment element (24). Further, the actuator comprises brake means for controlling the speed of the adjustment element (24), when the quick release (27) is activated.

Abstract: Disclosed is a method for estimating the range to an object, the method comprising: transmitting a first signal towards the object; receiving a reflected echo signal reflected from the object; and determining a measured point (MP) in an N-dimensional phase space. The range to the object is estimated by selecting a candidate range estimate from a plurality of candidate range estimates, each candidate range estimate in the unambiguous range R having an unique associated point in the N-dimensional phase space positioned on range lines, and wherein a candidate range estimate is selected dependent on the distance from its unique associated point in the N-dimensional phase space to the measured point (MP), so that a single range estimate is generated using information from at least two measured phase differences without directly averaging ambiguous range estimates.

Abstract: Disclosed is a method for generating a quality measure for a frequency set. The quality measure indicates the quality of the frequency set for use in a multi frequency ranging method for estimating the range to an object. The method for generating a quality measure comprises the steps of determining the smallest distance between any two range lines of a set of range lines in an N-dimensional phase space. The N-dimensional phase space comprises at least a first dimension representing a first phase difference, and a second dimension representing a second phase difference. The N-dimensional phase space has a dimension equal to the number of phase differences used by the multi frequency ranging method. The range lines represent all theoretical possible combinations of the phase differences.

Abstract: A linear actuator device for pieces of furniture, e.g. beds, is described which include an adjustable section (2, 3) pivotally embedded in a frame (1). The section (2, 3) is raised and lowered by at least one rod (23, 24) mounted on a pivot shaft (4, 6). The actuator comprises a housing (8) with a bushing (10) receiving the pivot shaft (4, 6), and a spindle (14) driven by a low-voltage DC motor (11). The spindle (14) carries a spindle nut (12) fixed against rotation which in one direction of motion operates an arm (5, 7) mounted on the pivot shaft (4, 6) for adjusting the section within the piece of furniture. By designing the arm (5, 7) such that, when it engages the spindle nut (12), it will rest against an area (17) of the nut's end which faces farthest away from the shaft, an expedient moment curve for pivoting the section is obtained, as a large moment occurs at the beginning and the end of the section's movement just when needed.

Abstract: An item of furniture includes a frame mounting two adjustable sections which each includes a pivot shaft to cause pivoting of the respective section relative to the frame. Each pivot shaft mounts a claw-shaped arm having two legs. A dual linear actuator having openings at its opposite ends is suspended from the two claw-shaped arms and is operable to rotate the pivot shafts by engagement of sliding spindle nuts therein with the respective claw-shaped arms.

Abstract: A linear actuator, in particular telescopic legs for height-adjustable tables, and comprising an outer profile (18), a spindle (7) mounted at an upper end of the outer profile, a transmission (8) connecting the spindle (7) with a reversible electric motor, a spindle nut (11) secured against rotation on the spindle (7), an intermediate profile (10) mounted with its one end on the spindle nut (11), a guide at a lower end of the outer profile (18) for the intermediate profile (10), a cord element (12, 20; 26) secured at the lower end of the outer profile (18) and connected via a guide with an inner profile (14), such that this together with the intermediate profile (10) is telescopically pushed out of and into the outer profile (18) by the rotation of the spindle.

Abstract: A telescopic column, in particular for height-adjustable tables, comprises a first member (1) and a second member (2) arranged telescopically relative to each other, wherein the first member (1) is provided with a rack (12) and the second member (2) with a gear wheel (5) in mesh with the rack. Configuring the rack as a plurality of holes (12) in the member (1) allows the column to be made of a thin sheet.

Abstract: A piece of furniture such as a bed or a chair, with an adjustable section (2, 3) adjustable about a pivot shaft (4) embedded in a frame (1). A claw shaped arm (5) intended for engagement with a spindle nut constructed as a sliding element in a linear drive is secured to the shaft (4) for adjustment of the section. The claw shaped arm (5) is with a simple punching and bending process made from a plate material. A correct mutual position of the two legs (13a, 13b) of the arm is obtained, as possibility for a good and stable fixing of the arm (5) on the pivot shaft (4) is achieve.

Abstract: A linear actuator device for pieces of furniture, e.g. beds, is described which include an adjustable section (2, 3) pivotally embedded in a frame (1). The section (2, 3) is raised and lowered by at least one rod (23, 24) mounted on a pivot shaft (4, 6). The actuator comprises a housing (8) with a bushing (10) receiving the pivot shaft (4, 6), and a spindle (14) driven by a low-voltage DC motor (11). The spindle (14) carries a spindle nut (12) fixed against rotation which in one direction of motion operates an arm (5, 7) mounted on the pivot shaft (4, 6) for adjusting the section within the piece of furniture. By designing the arm (5, 7) such that, when it engages the spindle nut (12), it will rest against an area (17) of the nut's end which faces farthest away from the shaft, an expedient moment curve for pivoting the section is obtained, as a large moment occurs at the beginning and the end of the section's movement just when needed.

Abstract: An electrical operating panel, in particular for height-adjustable tables equipped with actuators or lifting columns driven by an electric motor. The panel has a first part (1) intended for fixed mounting of the panel and a second part (2) with operating keys (19) for activating electrical switches. The two parts are hinged together, and the hinge is formed with a rotary shaft (10) on the no part and a bearing with a cylindrical face (13) on the other part and formed with interengaging projections (16) and depressions (15) such that the second part may assume various angular positions relative to the first part, the force between projections and depressions bearing greater than the necessary operative pressure on the operating keys, but smaller than the force necessary to manually move the second part between the various angular positions. The panel is of simple structure and easy to mount and use. The users may easily set the keyboard part in the desired angular position.

Abstract: A linear actuator useful for adjusting furniture includes a housing (1) with a reversible electric-motor (2) which, via a transmission (11, 13), drives a spindle (4) with a force absorbing bearing (16). On the spindle there is a nut (5) to which an actuation rod (86) is fixed surrounded by an outer tube (7). The actuator is with the actuation rod and a rear mounting mounted in the construction into which the actuator should be built-in. The motor housing is part of the supporting construction, as a console is fixed to this (10) with a fixing for the outer tube, spindle bearing and a rear mounting and is designed to absorb the forces occurring hereon. As the housing, as with previously known actuators, need not absorb and transfer forces, this can be made as a thin shell.

Abstract: An actuator includes a quick release inserted in a transmission between an activating element (6) and a reversible electric motor (2) for releasing the activating element from the electric motor and the part of the transmission extending from the motor to the quick release. The quick release comprises two cylindrical coupling parts (8, 9) surrounded by a coupling spring (11) having outwardly bent ends, said ends being connected with their respective cylindrical elements (12, 13), seated to take part in the rotation of the coupling under normal circumstances, and wherein the two cylindrical elements (12, 13) with a release (14) are adapted to being rotated mutually to turn the ends of the spring away from each other, such that the spring (11) is released from at least one of the coupling (8, 9) for complete or partial release of the coupling.