A mirror structure which is provided on a polished metallic surface characterized by an adhesive layer disposed directly on the surface, an amorphous intermediate layer disposed on the adhesive layer, a reflective layer disposed on the amorphous intermediate layer and a protective layer covering the reflective layer. The mirror structure is particularly useful for a highly adhesive and corrosion-proof laser mirror which has good reflection properties and is used in a laser flatbed scanner.

An electric heater structure designed to be used as an auxiliary water heater for showers, sinks and the like includes a housing defining a water heating chamber having an inlet for connection to a water supply pipe and an outlet for discharging heated water through an attached sprayhead. A pair of electric resistance heating coils of different length and thus different heat output are positioned within the chamber for heating the water. A selector switch manually operated by a lever is provided...

In a building which includes outer walls, a roof having a lower border that overhangs one or more of the outer walls, and a frame for supporting the outer walls and roof. The structure embodying the present invention includes a frame member forming an upper portion of the outer wall beneath the overhanging roof border and a wall panel forming a lower portion of the outer wall. The frame member has a top edge adjacent the roof. A roof support member is mounted on the top edge of the frame member ...

A valve of the type which is actuated under the pressure of the medium it controls and in which axially-aligned actuating and damping pistons are disposed within cylindrical relief and damping chambers and are connected to a valve element engageable with a valve seat disposed between inlet and outlet valve ports. The actuating piston acts under the pressure of the medium it controls to actuate the valve element in response to a reduction in pressure in the relief chamber. The invention itself re...

A circumferentially extending structure 30 for containing particles having an axial component of velocity and a radial component of velocity is disclosed. The structure includes an inner casing, such as the first casing 48, and an outer casing, such as the second casing 50. The outer casing is flexible. The outer casing is formed of a plurality of layers of fabric and a means for applying a load to the fabric such as a plurality of bars 80, 82 and turnbuckles 74. A method of forming the structur...

A circumferentially extending apparatus 46 for containing particles having an axial component and a radial component of velocity is disclosed. The apparatus is comprised of a support structure 48 and a flexible casing 50 formed of a fabric 78. The external surface of the support structure has a first diameter and a second diameter not equal to the first diameter at a location spaced axially from the location of the first diameter. The fabric is preloaded to increase the length of the fabric and ...

A septum (18) is installed at a desired depth within a section of honeycomb core (12) for use in a sound attenuation panels, the septum is sandwiched between two layers (20, 24) of support material having a melting temperature intermediate between the fusing and curing temperatures of the septum material. The honeycomb core (12) is pressed into supporting materials and septum to segment and position the septum (18) therein, after which the resultant assembly is heated sufficiently to allow the s...

A door for closing vehicular traffic passages is provided in which the door is a curtain fabricated from a hard flexible material. The curtain runs in opposing channels, is mounted on a counterbalanced wind-up drum and under impact changes weight, moves out of the channels and is wound up to open the vehicular passage.

A three-dimensional circuit structure suited for a routing type electronic switcher matrix, for analog or digital signals, in which internal wire interconnections are not required. Plural parallel-disposed zero-insertion-force connectors are orthogonally related on opposite sides of mother-boards that divide tiers in the structure. Selected conductive pins of the connectors are electrically connected to make necessary interconnections. Printed circuit cards are inserted in the zero-insertion-for...

Hose structure suitable for transport of highly abrasive media including at least two concentric tube layers of elastomeric material. The radially innermost tube layer material is of greater abrasion resistance than a tube layer radially outwardly thereof. A radially outer tube layer material is of greater resilience than that of the radially innermost tube layer. The tube layers may be made visually distinguishable, for example, by being of different colors, so as to serve as a wear indicator.