Abstract: A displacement apparatus comprising a first rail and a second rail, extending substantially parallel thereto, while on the first rail a first driving gear with a first motor is provided and on the second rail a second driving gear with a second motor is provided, the first and the second rail comprising at least one inclined portion, and control means being provided for the two motors, which control means are arranged for controlling the first and the second motor in a force-controlled manner at least on a portion of the at least one inclined part of the first and the second rail.

Abstract: A running gear (3), for a drive mechanism of a rail-guided displacement device, such as a passenger lift, comprising a base part, a drive and at least two sets of guide wheels (9), arranged behind each other, viewed in direction of travel of the running gear, so that, during use, the running gear is guided along the rail in a desired position by the guide wheels, the base part comprising at least a bridge piece (5), a first and a second frame part (6, 7), the frame parts each being connected to the bridge piece so as to be movable about at least one pivotal axis, each frame part carrying a set of guide wheels and the frame parts being mutually coupled by coupling means which form a mechanical mirror, so that the movements of the first and the second part are always each other's mirror image in a first plane of symmetry extending at right angles to the driving direction of the running gear between the first and the second frame part, and viewed relative to the bridge piece.

Abstract: A control circuit (200) mounted on a printed-circuit board comprises a control element (100) having a plurality of inputs (110.sub.i). Operating switches (Si) are connected with respective inputs (110.sub.i) by print tracks (12.sub.i, 30.sub.i). A signal source (10) generates a plurality of mutually different signals (.phi..sub.i) which are passed to the various switches (Si) and whose characteristic is priorly known. In case of, for instance, a short-circuit, a signal of a switch may end up at an input of the control element that does not correspond with that switch, but the control element can recognize this error situation because the received signal then has a wrong characteristic. The control element can then ignore the operating instruction, and/or generate an alarm signal. Thus the risk of incorrect operation by short-circuiting between adjacent print tracks is reduced, and the print tracks can be arranged closer to each other on the printed-circuit board.

Abstract: A swivel chair (1), comprising a seating part (2, 3) or a like support means and a support part, wherein the seating part is pivotally connected, via a first axis of rotation (4) which, during use, extends substantially vertically, to the support part (5), wherein mechanical activating means are provided for swiveling the seating part around the first axis of rotation, which activating means, during use, contact at least temporarily the seating part of the one hand and the swivel part on the other, the arrangement being such that through operation of the activating means, an activating force is exerted relative to the support part for initiation of a swivel movement of the seating part, and a stair lift comprising such a swivel chair.

Abstract: A mechanism for latching a rotary shaft for, for example, a lift door, provided with a control arm connected to the rotary shaft and pivotally coupled by means of a coupling piece to an operating arm which is rotatable about a fixed shaft, coupling piece and operating arm being brought into line with each other for the latching of a rotary shaft, and a control mechanism being present for operating the latch. The operating arm bears a further shaft, upon which the control mechanism acts, and which can be actuated by a control unit, which can unlatch the mechanism while at the same time tensioning spring means, which on blocking of the rotary shaft are additionally tensioned, which additional tensioning still rotates the rotary shaft further when the blocking is removed, and in which the control unit can release the control mechanism, with the result that the spring means tensioned earlier will rotate the rotary shaft to the latched position.

Abstract: The invention relates to a method for measuring at least one step of a stair, wherein the riser and tread of the or each separate step are determined, characterized in that at least two steps of the stair are provided, in a corresponding manner, with a reference point, whereupon a pin is positioned in each reference point, which two pins cross in a junction in such a manner that of each pin the length between the reference point and the junction is known, whereupon in the plane defined by the pins the angle is recorded that each of the pins includes with a reference line, which reference line includes a known angle, lying in the plane, with the vertical, and to an assembly for carrying out such a method.