Abstract: A cylindrical housing anchored in the opening of a concrete wall has a first cylindrical wall of generally uniform diameter attached to the inner side of the cylindrical housing and extending axially into the housing, a second generally radial annular wall has a radially outward side attached to the first wall and seals against a pipe through the cylindrical housing.

Abstract: A downward facing cavity is mounted directly below a vertical outlet pipe in a septic tank to collect particulate matter in the cavity.

Abstract: A cylindrical housing anchored in the opening of a concrete wall has a first cylindrical wall of generally uniform diameter attached to the inner side of the cylindrical housing and extending axially into the housing, a second generally radial annular wall has a radially outward side attached to the first wall and seals against a pipe through the cylindrical housing.

Abstract: A concrete cover for a subterranean construction includes a cast-in plastic handle which holds a piece of rebar in the cover and removably holds a piece of rebar externally of the cover.

Abstract: A unitary composite frame member of two or more structural elements. A first and a second of the elements each contributes strength to the member. The second element, a plastic, encloses the first element on essentially all surfaces along the length of the first element, and is molded to itself through openings in the first element. The first element is discontinuous in that it is two walls attached lengthwise, and a third wall parallel to them and separate from them. In one embodiment, the third wall and one of the two walls intersect laterally.

Abstract: A sash of a hopper window is linked to a shoe which engages a track in constant resistance to travel along the track such that the sash can be tilted by hand to any angle from the track within a predetermined range of angles, and will remain at the angle unaided.

Abstract: A plastic fluid subterranean distribution box with integral seal for a pipe, permanently and sealingly mounted in an opening in a wall of the box, including a substantially continuous annular bond between the seal and the wall on one side of the wall.

Abstract: A unitary composite frame member of two or more structural elements. A first and a second of the elements each contributes strength to the member. The second element which is preferably a plastic, has a conductivity not exceeding 5% of that of the first element, and covers the first element, contributing to the shape of the frame member. Preferably each of the two elements is strong enough to retain its shape without aid from the other element, and the second element contributes at least 10% of the structural strength of the member. The elements are molded together, with the covering element in a plurality of similarly shaped openings in the element that it covers.

Abstract: A muntin bar joiner includes adjustable tabs for attachment to muntin bars. The tabs may be rotated about an axis to customize the joiner for holding the bars in accordance with the muntin assembly design. The tabs move in a common plane when rotating, while parts of the tabs may move over one another. The tabs are interchangeable to accommodate different bar designs.

Abstract: A bracket for a screen frame corner has a bolt for latching the frame in a window frame, and intersecting tracks for the bolt, one track in each leg, from which the bolt may be extended from the bracket. Bifurcated radial spring legs on the bolt grip the track. The bolt may be inserted in a track by a front opening in bracket, and a frame bar mounted on the leg prevents removal of the bolt from the track. The corner bracket and the bolt with spring are each, molded single elements.

Abstract: A carriage which is drawn over a plurality of locations along a tightly threaded motor driven drive rod by a nut on the carriage, draws a chandelier support cable axially along the rod by way of a pulley on the carriage. The cable is wrapped on the pulley so that the vertical distance moved by the end of the cable for attachment to a chandelier is greater than the axial distance moved by the cable over the pulley. The drive rod is supported at each of the plurality of locations along the drive rod, against bowing.

Abstract: A pivot shoe that includes a rotary barrel cam mounted in the body of the shoe, and a brake in the opening that is urged axially rearward by the barrel cam, has a radial protuberance and an axial slot with radial wall operating in interference between the brake and an inward facing wall of the opening for holding the shoe in the opening.

Abstract: A single unit, stiff and strong plastic molded wheel spacer for a reinforcement rod used in concrete is split into two sections connected by an integral hinge at one end and fastened together by a ratchet assembly at the other end. The rod is gripped at the center of the wheel by a pair of saddles, one on each section. A finger attached to one of the sections between the saddle and hinge prevents the rod from moving past the saddle to the hinge.

Abstract: A nozzle dam has a valve controlled passage through the nozzle dam wall for releasing trapped gas from the nozzle in the region below the nozzle dam. The gas is released while the reactor coolant system water general level is above the level of the nozzle dam.

Abstract: A nozzle dam automatically latches on an annular ledge surrounding the nozzle opening. A pivotal latch arm on the dam, biased to the locked position is forced toward the unlocked position by a cam on the ledge as the nozzle is pressed on the ledge, and snaps into engagement with the ledge when the dam is fully seated over the opening. A bias arm may be operated by a wrench to pivot the latch arm toward the unlocked position until a detent locks the latch arm in the unlocked position.

Abstract: Two layers of flexible material, each of which is resistant to the passage of fluids and microbes, include spacers between them, and are hermetically sealed, for maintaining reduced atmospheric pressure in the space between them. Open cell foam supported in the space is compressed by the layers until one of the layers is torn, upon which the resulting increase in atmospheric pressure in the space allows the foam to resile, increasing the space between the layers as a warning to the user of the break. An electric switch which is responsive to pressure change is in communication with the space to also signal a warning of the break.

Abstract: A block having first and second permanent cavities. The first cavity includes a first vertical, continuous V-groove from the rop of the block to a pocket which has a permanent horizontal bottom wall. The second cavity includes a second V-groove that is parallel to the first V-groove, and which is continuous from the top of the block to a second permanent horizontal bottom wall that is at a predetermined height with respect to the bottom wall of the first cavity. Each cavity includes a bar pivotally attached to the block, which includes a flat surface for pressing normally to the bottom of the V-groove, along a vertical line of contact with the vertical cylindrical portion of a tool in the V-groove when the bar is positioned horizontally across the V-groove and is drawn to the block.