A seat comprising side uprights (110, 110'), a seat (120) and a back (130). It also includes a primary interlocking system (111, 111') to attach the side uprights in a roughly perpendicular fashion to the seat, a second interlocking system (122) to attach the seat in a roughly perpendicular fashion to the back, a wedge system (150) positioned between the back and the side uprights, and fasteners to lock the wedge system to the back and side uprights. Once the seat, uprights and back are interloc...

The present invention relates to a process for preparing hydrocyanic acid (HCN) by catalytic dehydration of gaseous formamide in a reactor which has an internal reactor surface made of a steel comprising iron and chromium and nickel, and also to a reactor for preparing hydrocyanic acid by catalytic dehydration of gaseous formamide, which reactor has an internal reactor surface made of a steel comprising iron and chromium and nickel, and also to the use of the reactor of the present invention in ...

The object of the invention is to provide a novel compound suited for use as a thermochromic and photochromic material. The invention relates to an indolinospirobenzopyran derivative of the general formula ##STR1## [wherein R.sup.1 stands for C.sub.1-20 alkyl, aralkyl, methacryloxymethyl or methacryloxyethyl; R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 may for example be hydrogen; R.sup.8 may for example be hydrogen or methacryloxymethyl; Y may for example be oxygen or sulfur] and a ...

A unit comprises a valve housing having a bottom portion; and a plurality of electromagnetic valves standing on the bottom of the valve housing. Each electromagnetic valve includes a coil which is housed in a housing structure. A cover member is put on head portions of the electromagnetic valves. A bolt extends from the cover member to the bottom portion of the valve housing to bias the cover member toward the bottom portion of the valve housing thereby to tightly fix the electromagnetic valves ...

The invention relates to a vertebral column implant for intercorporal fusion on the vertebral column, consisting of a body which consists of bone material and which is curved in the direction in which it extends longitudinally. The size of the implant is adapted to the intermediate vertebral space available between adjacent vertebrae after the intermediate vertebral body has been removed.

Microphone/amplifier system in which the microphone comprises a case with an inlet opening, a diaphragm and a backplate, and the amplifier is arranged in the case and is coupled to the diaphragm/backplate system. In the case, the diaphragm forms a first partition between a first compartment containing the inlet opening to the surroundings and a second compartment accommodating the amplifier. According to the invention, the second compartment is divided by a second partition into a first and seco...

A system, more particularly a hearing aid, consisting of a microphone and a preamplifier, wherein the microphone comprises a housing having therein an opening to the surroundings, a diaphragm and a backplate, while the amplifier is coupled to the system consisting of the diaphragm and the backplate and has a field effect transistor as input element. In the housing, in a space which is bounded by, on the one hand, the diaphragm and, on the other, the housing wall, and which does not comprise the ...

A tube mat made of elastomer material in the form of an extrudate includes first and second front faces which are arranged in a vertical or angled manner in relation to the extrusion direction. A plurality of tubes extend in parallel in the extrusion direction between the two front faces. At least a portion of each tube is closed at adjustable distances whereby a closed air column respectively is formed and whereby the tube seal together with the tube mat forms a one-piece elastomer composite. A...

The invention describes a container comprising a plurality of flaps, several of the flaps being adjustably joined in the region of their front edges by means of hinge mechanisms with the flap forming the base and at least one hinge pin extending parallel with a front edge of a flap is retained at a distance therefrom by means of a connecting link and is insertable in a groove of another flap and one of the two end regions of the groove is closed off across its width by a retaining shoulder and f...

The invention relates to a tool consisting at least partially of plastic material and containing nanoparticles which are included into said plastic material. Said tools exhibiting a high pressure and friction resistance, are used in particular as shaping tools, for example for deep drawing of metallic sheets for vehicle bodies.