Abstract: An automatic tack-off machine comprises a generally cylindrical rotary brush for lifting dust, dirt and sanding particles from the surface of a body to be painted without contacting the surface and a control system to position the brush is spaced noncontacting relation to the surfaces to be cleaned. The brush has strands of polymeric material that are radially extended and electrostatically charged by rotation with the control system operating to position the free ends of the strands in close proximity to the body. An ionizing system neutralizes the static charge in the strands to enable a vacuum system to remove the dirt particles from the brush.

Abstract: A multiple hose assembly including a plurality of hose portions which are disposed in a first direction in a substantially parallel and a substantially planar arrangement. In addition, the multiple hose assembly further includes a plurality of support members for securing the hose portions in the substantially parallel and the substantially planar arrangement. The support members used for securing the hose portions are disposed in a second direction which is different from the first direction.

Abstract: A booth for spraying a coating of material on an article. The booth includes a device for spraying material proximate to the article to be coated thereby generating an overspray. The booth also includes a wall for containing the overspray within the booth. Finally, the booth includes a plurality of wall covering units, each of which has a base layer and a plurality of removable sheets.

Abstract: A flexible coaxial conduit in a recirculating paint supply system disposed between a flow control restrictor connected to a paint spray nozzle and a pressurized paint supply line and return line for supplying paint to the nozzle in a quantity in excess of that required to insure continued recirculation and uniformity in the composition and quality of the liquid coating composition. The coaxial conduit is substantially transparent and in the preferred embodiments, the outer tube is of a composite construction to provide optimum flexibility while retaining resistivity to the attack from the liquid paint composition and from solvents.

Abstract: A flexible coaxial conduit in a recirculating paint supply system disposed between a flow control restrictor connected to a paint spray nozzle and a pressurized paint supply line and return line for supplying paint to the nozzle in a quantity in excess of that required to provide continued recirculation and uniformity in the composition and quality of the liquid coating composition. The coaxial conduit is substantially transparent and in a preferred embodiment, the outer tube is of a composite construction to provide optimum flexibility while retaining resistivity to the attack from the liquid paint composition.

Abstract: A liquid flow shut-off valve has a one piece housing with an internal ball valve biased by a coil spring to a normal position axially separated from its valve seat, precompression of the coil spring being adjusted so that a predetermined drop in downstream pressure allows upstream pressure to seat the ball valve and stop flow.

Abstract: An extensible bar hanger assembly designed to support recessed lighting fixtures in a ceiling. A pair of double L shaped bar members, one on each side of a fixture, are extensible and contractable to adjust between ceiling joists or other ceiling support to provide a rigid mount for the fixture. The bar members are each longitudinally domed to provide interlocking and each include an elongated slot extending the major length of each respective bar. One end of each bar includes a side extending barbed tab which is secured to adjacent ceiling joists. The opposite ends of the bar members include precisely formed locks. In the case of one bar member, the lock is an offset T shaped foot. The other end lock is a trapezoidal shaped head. These ends lock the joints together by interlocking through the elongated slots in the opposite bar member.

Abstract: A lamp mounting structure for use in recessed lighting fixtures comprises a planar portion having an illumination aperture over which a translucent plate may be removably retained. A lamp may be removably retained over said aperture by resilient tabs which extend inwardly beyond the edges of the aperture so as to engage the lamp whether or not such a translucent plate is interposed between it and the planar portion of the lamp mounting structure.

Abstract: A coupling including a tubular main body comprising means for fixing in a wall, and traversed by an axial channel terminating at one end in a conical flared portion. An annular nut screws onto said end of the body surrounding said flared portion. The bottom of the nut is pierced by an axial bore of diameter similar to that of said axial channel. The nut receives internally a sealing ring deformable by tightening, supported on said bottom of the nut to apply on said conical flared portion and to deform by tightening, an annular clip for anchoring said cable extending. The coupling is useful for the fluid-tight fastening of cables through a wall.