Abstract: A water distributor provides a uniform supply of water to an evaporative panel held in a frame of an evaporative apparatus. The water distributor includes a base having a plurality of flow channels, each of the flow channels having an inlet port for receiving water from a source, an outlet port for delivering water to the evaporative panel and a tortuous path connecting the inlet port with the outlet port for providing high flow resistance so as to facilitate the consistent and even flow of water through each of the outlet ports. The volumetric flow velocity of the water is controlled within a desired range at normal water supply pressures.

Abstract: A device for controlling the movement of a damper mounted in a housing includes a shaft rotatably secured to the damper for pivoting the damper between an open position and a closed position. A lever arm is mounted on the shaft for rotation therewith and a spring is connected between the housing and the lever arm for normally urging the damper towards the open position. A motor is mounted on the housing and is actuable to overcome the force of the spring to move the damper to the closed position. A force translation arrangement is disposed between the motor and the lever arm for translating the driving force of the motor when the motor is energized to move the damper to the closed position, and for gradually braking the motor when the motor is de-energized and the spring returns the damper to the open position.

Abstract: A device for controlling the movement of a damper mounted in a housing between an open position and a closed position comprises a shaft rotatably secured to the damper for pivoting the damper between an open position and a closed position. A lever arm is mounted on the shaft for rotation therewith, and a spring is connected between the housing and the lever arm for normally urging the damper towards the open position. A motor is mounted on the housing and is actuable to overcome the force of the spring to move the damper to the closed position. A control arrangement associated with the housing is provided for regulating the speed of the damper as the damper moves from the closed position to the open position.

Abstract: A gas-pervious, liquid-gas contact pad comprises a reticulate body of water-permeable or wettable material having a large area of surfaces exposed for humidification purposes or the like. A plurality of slit and expanded sheets of wicking paper are connected in superposed and alternating relationship with a plurality of slit and expanded sheets of water-absorbent or wettable kraft paper to form a self-supporting, laminated evaporative element.

Abstract: A selectively removable door assembly is provided for completing an air filter housing having a series of interconnected walls for enclosing an air filter, certain of the walls being formed with retaining pockets. The door assembly comprises a door having a main portion and opposed end portions. Each of the end portions is provided with a ridge engageable with a respective one of the pockets on the walls for retaining the door on the housing. At least one of the ridges is resiliently and slidably mounted on the door in a biased snap-fit in its respective pocket such that pushing against the bias of the resiliently mounted ridge will permit movement of the other ridge out of its respective pocket and allow the removal of the door to access the air filter.

Abstract: A one-piece framework for holding the filter media of an air filter includes a pair of end walls integrally connected to a pair of frame members by a living hinge so that they may be pivotally moved between an assembled position and an unassembled position. A pair of sidewalls are integrally connected to the frame members by a living hinge only at their outermost ends so that they, too, may be pivotally moved between their assembled and unassembled position. Each of either of the sidewalls or end walls is provided with a tab-type latch which includes a button undercut at least a peripheral portion thereof. Each of the other sidewalls or end walls has an opening formed therethrough. The opening is defined by a wall shaped in accordance with and frictionally surrounding the undercut button in a snap-fit to hold the sidewalls to the end walls in an assembled state.

Abstract: A frame for a panel-like filter having two sides terminating in an edge comprises a semi-resilient deformable channel having an inwardly curved web with two flanges extending from a convex side thereof. The curved web also has a longitudinally extending stiffening rib projecting from the convex side thereof. The flanges are engageable with the sides of the filter.

Abstract: A paint arrestor for absorbing paint overspray comprises a series of layers of sheet material, each of the layers being slit and expanded to define an array of air spaces distributed in columns. The air spaces alternate in size from column to column and repeat in size in every other column. Means are provided for securing the layers in contiguous, overlying relationship with one another.

Abstract: A mounting system for suspending an appliance from a supporting structure includes an elongated U-shaped bracket and a plurality of fasteners for securing the bracket to a supporting structure. A mounting pin is disposed toward one end of the bracket and a mounting hook is disposed toward one end of the appliance so that the hook may be placed over the mounting pin and the appliance can be pivotally suspended from the bracket. A locking means is provided toward one end of the appliance so that the appliance may be pivoted about the mounting pin and locked onto the bracket.

Abstract: A corner frame construction for a heat exchanger includes an elongated L-shaped member disposed between the top and bottom plates of the heat exchanger. The L-shaped member has a first leg extending parallel to a first edge of the media layers and a second leg extending perpendicular to the first leg and parallel to a second edge of the media layers. A first flange is connected to the first leg and extends inwardly toward the edge of the media layer and a second flange is connected to the second leg and extends inwardly toward a second edge of the media layer. A layer of flowable sealant is disposed along the length of the L-shaped member and is contact with both the first and second legs, the first and second media edges and the first and second flange members.

Abstract: A multi-unit grease filter includes a first filter unit and a second filter unit, each having an upstream series of spaced apart elongated baffles and a downstream series of spaced apart elongated baffles offset from the upstream series of baffles so that the baffles overlap and expose the air to multiple surfaces as it travels through the filter. The baffles have their ends connected to a pair of end frame members, each of which has at least one spacer in the form of a side edge having a first portion co-extensive with the upstream series of baffles and a second portion co-extensive with the downstream series of baffles so as to provide an off-set in each of the end frame members so that when the first and second filter units are disposed in abutment side by side, the off-sets align and overlap so that a bifurcated seam line is formed at the abutment and a downstream baffle overlaps with an upstream baffle at the seam line.

Abstract: A one piece framework for holding the filter media of an air filter includes a pair of end walls integrally connected to a pair of frame members by a living hinge so that they may be pivotally moved between an assembled and unassembled position. A pair of side walls are integrally connected to the frame members by a living hinge only at their outermost ends so that they, too, may be pivotally moved between their assembled and unassembled position. The side walls and end walls are provided with a projection and a projection receiving latch that locks the end walls and side walls in their assembled state.

Abstract: An electrical control assembly for a humidistat controlled humidifier of the type having a base connected to the furnace ductwork and a cover removably connected to the base includes a control circuit board having a primary circuit for operation of the fan and a secondary circuit for operation of the humidistat and solenoid valve. A separable electrical connector disposed within the humidifier has a connected state in which power is supplied to the humidistat and a solenoid valve and a disconnected state in which power for the humidistat and solenoid valve is cut off. The electrical connector is fixedly mounted in the base and cover of the humidifier and is positioned so that the electrical connection is automatically made when the cover is connected to the base.

Abstract: A frame for holding an evaporative pad in the base of a humidifier includes side walls, base and a top that define an evaporative pad holding chamber. Each of the side walls, base and top is provided with a flange that extends inwardly toward the opening and is engageable with a lip on the base to form an air seal. The flange is provided with a rib portion that extends outwardly away from the pad chamber and is dimensioned so as to create a gap between the rib and any adjacent base surface in order to inhibit the migration of mineral deposits from the pad to the base.

Abstract: An erosion control blanket is made of recycled, biodegradable slit and expanded sheets of paper. A plurality of layers are provided and are oriented such that the slope of the baffles in the grid pattern of the paper may be disposed in a positive or negative direction relative to the slope. The upper layers promote runoff of water for reducing erosion. The lower layers trap the water which passes through the blanket, passing it into the soil, and trap loose soil particles. The open grid pattern provided by the slit and expanded paper provides ample air space for promoting the germination and growth of seeds.

Abstract: A multi-stage filter assembly having a number of filter media layers, at least one of which is removably mounted to a filter frame, utilizes a retaining clip to hold the filter media in place. The retaining clip is in the form of an elongated strip that extends across the filter media and has its ends disposed within channels formed in the frame. The elongated strip is provided with a centrally located bend that causes the ends of the clip to be urged upwardly into engagement with the framework and causes a portion of the clip to be urged downwardly into engagement with the filter media.

Abstract: A Gigli saw used by a surgeon to cut bones is constructed of a plurality of round wires which have been deformed in a coining stand so that they form one polygonal shape which in the preferred embodiment is square. This square strand is then twisted along its own axis in a given direction of lay. It is then heat-treated for stress relief and a plurality, such as three, of such strands are twisted together to form a cable. This results in a Gigli saw blade with many cutting edges formed at the edges of the polygon as each such edge is presented at the periphery of the cable. Preferably, the strands have a different number of twists from that of the cable, and are twisted in the opposite direction so that the cutting edges lie at about 5 to 15 degrees relative to the longitudinal axis of the cable.