The invention pertains to housing for receiving a component which can be connected to the housing in a pluggable manner, in particular an optoelectronic transceiver, the housing having at least one pressing spring, which is deflected when the component is inserted. According to the invention it is provided that the at least one pressing spring ( 71, 72 ) tapers in its width in the direction of the interior of the housing. It is preferably of a trapezoidal design. Higher spring forces can be realized with it and it is ensured that a component which is plugged into the housing can be removed from the housing in a safe and reliable manner during unlocking of the housing.

Housing for Receiving a component which can be connected to the housing in a pluggable manner

A hollow concrete building block is provided having physical characteristics which diverts water penetrating inside the block away from the interior of the building. The block comprises parallel interior and exterior walls and at least one transverse vertical web spanning between the walls to form a unitary block with an interior cavity. The webs have notches on the top and bottom surfaces which divert any infiltrating water into the cavities. The notches span the length of the top and bottom surfaces of the web. The apex of the top notch is proximate to the exterior wall of the block while the apex of the bottom notch is proximate to the interior wall. Once in the cavities, the water drops to the lowermost block where conventional flashing and weep holes convey the water to the exterior.

Water diverting building block

The coating method involves spraying a layer of concrete onto the tunnel inside wall via a spray jet (9) supported by an extendable spray lance (6) supported from a mobile vehicle (2). The vehicle is positioned at a fixed point in the tunnel for each spray charge, with a rotary measuring probe (8) attached to the spray lance used to measure the profile of the tunnel section (4). The profile information is fed to an on-board control (10), for subsequent control of the spray jet.

Tunnel inside wall coating method

The apparatus consists of a base frame which can be shifted in the driving direction and has a track running transversely to the driving direction. One or more supporting elements are movably arranged on the track. One or more spray nozzles are mounted in the supporting elements in such a way that they can be displaced back and forth at right angles to the spray area and in the driving direction. Each spray-nozzle top part is rotatably mounted in the nozzle base about its longitudinal axis and can be extended in the longitudinal direction of the nozzle. All functions of the apparatus can be controlled both manually and automatically in a preprogrammed manner. A closed discharge of sprayed material is obtained by appropriate coordination of the possible longitudinal, transverse and rotational movements of the nozzles.

Apparatus for applying sprayed material for securing and lining excavated areas in the construction of underground cavities

A walking mine support includes a roadway support unit and a face-gallery support unit laterally of the same. The two units are linked by one or more four-pivot couplings whose members can tilt both lengthwise and transversely of the elongation of the roadway and permit walking movements of the units with reference to one another without interfering with proper support of either the roadway or the face-gallery.

Walking mine support

Mine heading wall spray concreter or plastics coater equipment with floor console, swivel boom and piston unit for adjusting the sprays, and linkage between the control console and boom linkage for all positions relative to the roadway walls as in 361968. The piston and cylinder units acting as connecting linkage between console and spray linkage, as well as piston controllers for the sprays are connected by hand or remotely air-operated 4/3 way valves to the feed or return lines. The valves are switched over by hand using associated switch levers as compared with the remote air-operation which is completed by compressed air switches allocated to the respective way valves, with the aid of a linking line between the switches and a console mounted air distributor and pre-set valve system.

Mine heading wall spray concreter - has connecting pistons liknnked by air switch system to spray boom

Hilfsvorrichtung fuer den einsatz in untertaegigen strecken, stollen, tunneln usw.

Abspannvorrichtung fuer einen strebfoerderer

Anchor station for conveyors, winning machine etc. in steeply inclined seams comprises two crossbeams which adjust relative to oen another and thrust against the roof with mounted props. The upper beam, i.e. higher up the gradient (5), can adjust in angle on an abutment (34) clamped in the top road (1). The abutment (34) can adjust in relation to a slide base which can itself be anchored in the top road by holding props. The slide base is connected at adjustable angle to a tensioning sled (15) which serves the lower beam (4) and travels along the upper beam (5) for this purpose. The abutment (3) should include two rigidly beam connected (38) floor housings which on the face side at face flooe level carry swivel plates (21) for mounting the prop (9) bases at the ends of the upper beam (5). The beam part (38) of this abutment bearing should pass axially through the slide base hinged to the sled (15) round verical joints (43).

Anchor station for conveyor or winning machine - has upper and lower beams with abutment, tensioning sled, props and slide base

Coalface anchorage for conveyor and winning machine has a stell beam and reciprocal groups of bracing and support cylinders which can be loaded and relieved alternately by means of a multiple control valve between main line and feed and bleed lines, together with supplementary lines and flow valves. The cylinders associated with the stell beam have their own secondary valve which is placed in a supplementary pressure line leading to the cylinder pressure space for supplying small amounts of supplementary pressure medium to this. This secondary valve is opened and closed by means of the pressure of the medium passed from the main line through the control valve. Thus when the main control valve is shut or neutralised, the stell beam cylinders are subordinated at once to the supplementary medium pressure and remain thus throughout the anchoring period.

Coalface conveyor and machine anchorage - secondary valve supplies pressure medium for anchoring stell beam

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