Abstract: A device for holding reading or writing material or a laptop in a laying or seated position includes two board-like, trapezoidal side panels [112, 114] made of wood product, a cross-beam [16, 115] made of wood product holding the side panels together and preventing one panel moving with respect to the other, a support plate [20, 120] made of plywood, the position of which can be adjusted in relation to the side panels, and a device [22, 24; 122, 124] for setting the different positions of the support plate in relation to the side panels one of which contains a row of holes [24, 124] into which a pin [22, 122] can be inserted to hold the support plate in the desired position whereby insertion of the pin (122) in a hole [124a] and the stopper [127] allow for the support plate to be horizontally positioned.

Abstract: A Coriolis mass flow/density sensor which can be installed in a pipe and through which a fluid to be measured flows during operation is balanced over a wide density range so that accurate measurements are possible. The Coriolis mass flow/density sensor includes a measuring tube, an excitation arrangement for exciting the measuring tube to vibrate in a second fundamental flexural mode of vibration; and a counterbalance member attached to the measuring tube which counterbalances the vibration of the measuring tube. A cantilever can be attached to the measuring tube midway between the inlet end and the outlet end of the measuring tube. First and second sensors sense the measuring tube vibration on the inlet and outlet sides of the measuring tube, respectively.

Abstract: This sensor (10) generates accurate measuring results, for example with an error in the order of 0.5% of the measuring value, hat has mimimized production costs as well as a shorter overall length compared to that of conventional sensors. The sensor has two parallel V shaped measuring tubes (1, 2) each being of one-piece construction. Each tube has a straight inlet portion (11, 21), a straight outlet portion (12, 22), an inlet bend (13, 23) connected with the inlet portion, an outlet bend (14, 24) connected with the outlet portion, a straight tube portion (15, 25) connected with the inlet bend, a straight tube portion (16, 26) connected with the outlet bend, and a vertex bend (17, 27) connected with the first and second straight tube portions. The inlet portions (11, 21) are fixed in an inlet manifold (18) and the outlet portions in an outlet manifold (19); the manifolds (18, 19) are mounted in a support frame (30) which forms part of a housing (3).

Abstract: A device for holding reading or writing material or a laptop in a laying or seated position includes two board-like, trapezoidal side panels [112, 114] made of wood product, a cross-beam [16, 115] made of wood product holding the side panels together and preventing one panel moving with respect to the other, a support plate [20, 120] made of plywood, the position of which can be adjusted in relation to the side panels, and a device [22, 24; 122, 124] for setting the different positions of the support plate in relation to the side panels one of which contains a row of holes [24, 124] into which a pin [22, 122] can be inserted to hold the support plate in the desired position whereby insertion of the pin (122) in a hole [124a] and the stopper [127] allow for the support plate to be horizontally positioned.

Abstract: This mass flow/density sensor (10), which can be installed in a pipe and through which a fluid to be measured flows during operation, is to be balanced over a wide density range, so that accurate measurements are possible. A single straight measuring tube (13) having a longitudinal axis (131) extends between its inlet end (11) and the outlet end (12) and is fixed to a support, e.g., a cylindrical tube (14, 14'). The support has a longitudinal centroidal line (141) which is parallel to, but does not coincide with, the longitudinal axis (131) of the measuring tube. A cantilever (15) is fixed to the measuring tube (13) midway between the inlet and outlet ends (11, 12) and in operation causes the measuring tube to vibrate either in a first fundamental flexural mode or in a second fundamental flexural mode having a higher frequency than this first mode. An excitation arrangement (16) disposed midway between the end pieces excites the measuring tube (13) in the second mode.

Abstract: This mass flow sensor has a vibration-body arrangement through which flows a fluid to be measured and which comprises the following parts: two plane, congruent tube loops each consisting of a straight inlet tube with an inlet end, a straight outlet tube with an outlet end, which ends are fixed in a common mount, and a tube bend interconnecting the respective inlet tube and the respective outlet tube. Mounted at the junctions of the respective inlet and outlet tubes and the associated tube bends is a plate with holes which correspond to the outside diameter of the straight tubes and the tube bends and in which the latter are fixed to determine a respective vibration node. A vibration exciter sets the two tube bends into opposite sympathetic vibrations perpendicular to their respective planes, and two sensors are spaced along the straight tubes for sensing the vibrations of the latter.