Abstract: An electrical igniter cap has a reproducible igniter characteristic by virtue of the fact that, at the firing side, an igniter unit 20 is covered by a sheeting of plastic material 21 which is rupture-resistant but tears quickly, and also at the firing side it bears against a sieve plate 28 with defined hole cross-sections.

Abstract: A dust-proof element for reducing creeping dispersion of dust along a free surface formed as one of locally limited dust trap element (5) and dust barrier (7) having a surface with an artificial pimpled microcrystalline structure with bumps and indentations having a size in a range from 5 to 100 &mgr;m and spaced from each other by a distance from 5 to 200 &mgr;m, and a method of protecting hand-held tools and working tools with the dust-proof element.

Abstract: There is now provided a building having a pitched, sculptured tile roof with a ridge extending atop the pitched, sculptured tile roof, with a pitched tile roof venting arrangement disposed at the ridge. The building has walls to support a roof having a ridge beam, roof rafters, and battens that support roofing tiles. The roof also has a row of ridge tiles disposed on said ridge beam. A venting arrangement is disposed atop the ridge beam, between the ridge tiles and the roofing tiles. The venting arrangement has a center strip that is placed onto the ridge beam, and two side strips that cover a portion of adjacent uppermost roofing tiles. The side strips have air venting openings for the passage of air from beneath the roof to the outside of the roof. The air venting openings are covered by cover bands which cover bands permit passage of air to flow therethrough and prevent rain or drift snow to readily penetrate through the air venting openings.

Abstract: For the crack-free production of pressed explosive bodies, in particular jet- and projectile-forming pressed explosive bodies the insensitive explosive mixture has TATB deposited directly on the secondary explosive. It may contain small proportions of binders, for example DOA, calcium stearate or Aerosil.

Abstract: The present invention relates to a building having a roof with structured roof tiles and a structure projecting out from the roof surface, such as a chimney, a window, a wall, or ventilating pipe and to a method of constructing a roof of a building covered with structured roofing tiles and a structure projecting out from the roof surface, such as a chimney, a window, a wall, or ventilating pipe and also the gap between a ridge, an arris or hip covering.

Abstract: A drill including a body having mortises (7), and a solid hard metal head (4) having a plurality of bits (3) and secured to the drill body over the end surface (5) of the head (4) and additionally secured to the drill body over portions of side surfaces (6) of the bits, which are located in a radially outer region of the head (4), with the side surfaces (6) extending into mortises and including first surfaces, which are associated with at least some of the bits (3) and are subjected to pressure acting in a rotational direction of the drill during operation of the drill.

Abstract: The present invention relates to a building having a roof with structured roof tiles and a structure projecting out from the roof surface, such as a chimney, a window, a wall, or ventilating pipe and to a method of constructing a roof of a building covered with structured roofing tiles and a structure projecting out from the roof surface, such as a chimney, a window, a wall, or ventilating pipe and also the gap between a ridge, an arris or hip covering.

Abstract: An electrical igniter cap has a reproducible igniter characteristic by virtue of the fact that, at the firing side, an igniter unit 20 is covered by a foil of plastic material, which is rupture-resistant but tears quickly, and also at the firing side it bears against a sieve plate 28 with defined hole cross-sections.

Abstract: A dust-proof element for reducing creeping dispersion of dust along a free surface formed as one of locally limited dust trap element (5) and dust barrier (7) having a surface with an artificial pimpled microcrystalline structure with bumps and indentations having a size in a range from 5 to 100 &mgr;m and spaced from each other by a distance from 5 to 200 &mgr;m, and a method of protecting hand-held tools and working tools with the dust-proof element.

Abstract: A drill including a body having mortises (7), and a solid hard metal head (4) having a plurality of bits (3) and secured to the drill body over the end surface (5) of the head (4) and additionally secured to the drill body over portions of side surfaces (6) located in a radially outer region of the head (4), extending substantially parallel to a rotational axis (A) of the drill and extending into mortise means (7), with the side surfaces (6) including first surfaces, which are associated with at least some of the bits (3) and are subjected to pressure acting in a rotational direction of the drill during operation of the drill.

Abstract: A covering material which can be plastically deformed by band and extended in at least one direction. The covering material has a substrate with openings, at least the top side of which substrate has a top coating which covers the openings. To create an economical covering material for covering the gap between a planar surface and a structured surface, in particular a highly structured roof surface, the covering material can be extended in at least one direction more than 30%, can be bent perpendicular to the direction of extension, and the entire surface of which covering material can be permanently and plastically deformed in three dimensions. The top coating is of a thin flat stock and that the coated substrate is, at least in the direction opposite the direction of extension, compressed, crepe-like, by at least 25% of its original length so that the surface of the covering material exhibits irregular little corrugations.

Abstract: Process and arrangement for producing tetrahydrofuran from a hydrous butane diol solution contaminated by light volatile, organic compounds, comprising the following process stages: a) Distillative removal (K1) of the light volatile, organic compounds contained in the hydrous butane diol solution 1. b) Dehydrating (R) of the thus prepurified hydrous butane diol solution 3 over an acidic aluminum oxide catalyst. c) One-step or multi-step distillation (K2) of the thus obtained high-tetrahydrofuran fraction 8 for obtaining a pure tetrahydrofuran. In addition, a separation of the water from the hydrous butane diol solution to water contents of from 2 to 70% by weight, particularly 2 to 10% by weight, can take place before the dehydrating of the butane diol.

Abstract: A pneumatic movement damper has a cylinder closed on one side, a piston that slides within the cylinder and is connected to a piston rod, a packing mounted on the piston and a throttle passage arranged in the piston for connecting the two cylinder spaces separated by the piston and the packing. The piston has a conical seat that widens away from the piston rod and a flange part adjacent to the largest diameter of the conical seat. The packing has a truncated recess that matches the conical seat and can move within limits in the axial direction between the flange part and a ring-shaped flange arranged on the piston rod at an axial distance from the flange part. Radial grooves are provided in the faces of the flange part and ring-shaped flange normal to the axis of the cylinder and oriented towards the packing. The groove provided in the flange part has a smaller cross-section than the groove arranged in the ring-shaped flange and forms the throttle passage.

Abstract: An unthreaded attachment of a joint eye to the piston rod of a vibration damper or spring strut, particularly by resistance welding. The piston rod and joint eye are held by one clamp electrode each, and the axial force created during welding is absorbed by a stop. A positive-locking connection is arranged between the piston rod and the clamp electrode to achieve axial fixing, so that joint eye can be attached in any installation state of the damper, even when the vibration damper is already installed.

Abstract: Process for the filling of a piston-cylinder unit, for example a shock absorber, with compressed gas and for closing the gas chamber of the piston-cylinder unit with a sealing element in the form of a base. The piston-cylinder unit is placed in an apparatus which apparatus can be connected to a compressed gas source from which the gas chamber is filled. The base is inserted by the apparatus into the open end of the piston-cylinder unit, after which the piston-cylinder unit, now under pressure and closed off by the base, is closed by, the process of welding.

Abstract: A roof tile construction includes a ventilation tile having pliable portions provided by a membrane of PVC (polyvinyl chloride) which is readily deformable to complement the shapes and configurations of adjacent roof tiles, whereby gaps between the headlap, side-lock and tail portions of tiles immediately adjacent the ventilation tile are substantially closed. The ventilation tile also includes a rigid body portion for supporting the membrane, the body portion being generally of planar configuration and being provided with adapter means for accommodating ventilation means such as a ventilation cap, or a soil pipe. The membrane is also of generally planar configuration and includes a headlap portion, oppositely disposed side-lock portions and a tail portion which extends beyond the rigid body portion.

Abstract: For sealing the ridge cover of a pitched roof there is used a sealing strip (10) comprising a center strip (11) with an air-permeable, water-repellent and drifting snow-tight non-woven material (12) including side strips (20, 30) contiguous therewith, at least the outer longitudinal edges of said side strips being adaptable to the top surfaces of roofing tiles (2'). Each side strip comprises soft, extensible polyisobutylene sheet strips having an expanded metal embedded therein which exhibits a longitudinal extensibility of 50 to 150% and a transverse extensibility of >20% and a recovery of >5%.

Abstract: A track spike (1) with a single or double shaft for wooden ties with spring loop (6), shaft (5) and crosspiece (4). The crosspiece (4), is, in its upper area via a bend (9) of the corresponding shaft portion in the direction of the rail foot (8), offset with resilience relative to the shaft (5). The crosspiece thus engages and retains the rail in position on the tie.

Abstract: An explosion-proof plug includes a first casing part having two ends and an outer wall having an edge and defining a compression-resistant annular chamber being open toward one of the ends, an annular transformer disposed in the annular chamber, a cover secured to the first casing part covering the annular chamber and the transformer, a second substantially bowl-shaped casing part adjacent the edge of the outer wall, the second casing part and the cover together defining a first connection space with increased security as compared to other portions of the plug for receiving connecting cables to be connected to the transformer, a third casing part securely connected to the first casing part defining a second space of increased security, and plug pins being held in the third casing part and connected to the transformer.

Abstract: In this ridge or hip covering, flexible sealing strips (9) are arranged between the covering caps (7) fastened to the ridge or hip board (6) of the roof structure and the roofing tiles (3).In order that the sealing strips (9) can universally be used with the most different roofing tiles and roof pitches, they comprise a flexible supporting strip (10) which is provided on one or both longitudinal edges (11) with a comblike edge part (12) of elastically deformable material, the teeth (12a) of which are connected with an edge strip (13) of flexible material which bridges the tooth spaces allowing the teeth to spread, whereby the outer longitudinal edge (14) of the edge strip adapts to the contour of the upper side of the roofing tiles (3) lying below it.If with the sealing strips (9) both a sealing against rain and driving snow and a ventilation of the roof space is to be made possible, an air-permeable bonded fabric, in particular of polyester or polyamide fibres, can be used for the edge strip (13).