Abstract: A backwater gate valve assembly having a gate valve movable between a closed position where the gate occludes an outlet opening and an open position where the gate valve does not occlude the outlet opening. The gate valve is coupled to a motorized actuator that is configured to move the gate valve between the open and closed positions upon sensing of a predetermined level of water in the body of the backwater gate valve assembly.

Abstract: A trench drain section for connecting to a mating trench drain section and forming a trench drain system. The trench drain section includes a trough having sidewalls connected by a bottom wall and cooperating to define a channel. The trough further includes an open top, an open end and is connectable to another trench drain section. A pair of rails extend along the sidewalls and are secured by fasteners. Extending over the open top, a grate is supported on the rails. The drain section also includes an alignment bracket having first and second portions that are individually connectable with one of the fasteners. When one of first and second portions is connected with one of the fasteners, the other the portions of the alignment bracket extends from the trough through the open end thereof and is available for connecting to another trench drain section.

Abstract: A trench drain defining a channel and having an accessory rib allowing the convenient attachment of accessories to the sides of a drain in order to facilitate the installation of a trench drain, place drain outlets at any convenient places along the trench drain, and to create right angle joints between two trench drains.

Abstract: A floor drain assembly for connecting to a drain system of an installation site. The floor drain assembly includes a drain body having drain coupling adapted for connecting to the drain system, a collar mounted to the drain body, and a rough-in adapter having a radially extending flange. The rough-in adapter is axially adjustably mounted to the collar and a strainer frame is axially adjustably mounted to the rough-in adapter. Mounted to the frame is a strainer. A cover encloses the strainer and strainer frame and includes a central region and a downwardly extending perimetric wall that is removably mounted, at a lower end thereof to, the flange of the rough-in adapter.

Abstract: A threshold drain for collecting an incoming flow of water. The threshold drain includes a catch pan having sidewalls, end walls, a bottom wall and an open top. The catch pan having a width defined between the sidewalls, a length defined between the end walls and a depth defined between the bottom wall and the open top. A grate received within the catch pan and extending between the pan sidewalls. The grate includes a louver array portion and an inlay tray portion. The louver array is configured to permit water to pass into the drain. The inlay tray portion is configured to receive a flooring material.

Abstract: The glass pane of an emergency equipment access panel is replaced by tempered glass as opposed to conventional annealed glass panels of the type available in the prior art. Tempering places the surfaces of the glass in a higher degree of compression while balancing tensile forces are confined to the interior. Because of the high degree of permanent stress induced in the glass by tempering, if any portion of the tempered glass is weakened, such as by cracking even an edge thereof, the entire structure virtually disintegrates into a large plurality of small, relatively harmless pieces, leaving no significant size shards of glass that might otherwise injure one's hand or arm reaching through the shattered glass to gain access to the interior of a cabinet for example. An edge breaking device provides a simple and convenient means for exploiting the high stresses built into tempered glass and produces the virtual disintegration of the glass panel even though only an edge portion thereof has been fractured.

Abstract: A cabinet structure for a fire extinguisher has a glass door mounted in a frame. The glass is tempered glass, which shatters easily into small pieces upon cracking a portion thereof. A steel breaking lever is attached to an edge of the glass. When the breaking lever is rotated, it causes the glass to shatter into small, harmless pieces as a result of the inherent nature of built-in stresses in tempered glass, thus allowing access to the interior of the cabinet.

Abstract: An enlarged area addressable matrix is disclosed comprising the following major components: a matrix addressable circular display, a square mounting plane, display drivers, and routing between the display and the display drivers. The display is located on the square mounting plane so that four corner regions are formed where the display does not cover the square. These four corner regions are used to accommodate the wiring and driver circuits needed to control the display. Thus the display, display drivers, and routing all fit on the same mounting plane.

Abstract: A hybrid CRT display includes vector generated portions for alpha-numeric data and normal raster scan portions for symbol data. A deflection yoke for a CRT is driven by a single horizontal amplifier having switching means which operate the amplifier in three modes necessary to achieve the hybrid display, enhanced by resonant retrace during raster scanning.

Abstract: An improved door gasket comprises a snap base having a pair of oppositely facing flanges. Running along the web of the snap base between the snap flanges is a pair of catches which each mate with a complimentary one of a pair of depending latches on a snap channel when the snap channel is pressed against the snap base. A strip of elastomeric gasket material is wedged at each of its lateral edges between a separate one of the snap base flanges and the snap channel flanges to form a half rounded deformable sealing body. Although the snap channel is thus firmly held to the snap base by the engagement of the snap base catches and the snap channel latches, easy separation of the snap base and snap channel is accomplished by simply prying the snap channel from the snap base to facilitate gasket strip replacement.

Abstract: A circuit is provided which accepts digital position information from a graphics generator. This information serves as an input to a look-up table to determine whether the position information would cause any portion of a symbol from the graphics generator to be inside a clipping boundary, which boundary frames higher priority symbology. If this is found to be the case, the circuit excludes or clips the symbol portion that would otherwise interfere with the higher priority symbology.

Abstract: An automatic door operator for opening and closing a door such as a cold storage door which is mounted in a frame for sliding movement in a vertical plane has a hydraulic control system which includes an electric motor for rotating a reversible hydraulic pump, an electric control circuit which activates the electric motor to rotate the pump in the appropriate direction, and a reversible rotary hydraulic motor driven by the pump to rotate a chain drive which draws the door to its open and closed positions. The hydraulic control system also includes a means for cushioning the rapid start and stop of the door to provide smooth operation which includes a pair of check valves disposed in the control system such that one check valve is on either side of the hydraulic pump, and a first set of pressure relief valves disposed in the control system on either side of the pump between the pump and the check valves, and a second set of pressure relief valves between the check valves and the hydraulic motor.

Abstract: A reboiler for dehydrating di- or tri- ethylene glycol comprises a cylindrical, horizontal axis tank having a ceramic packed still column rising from its top near one end and a single U shaped fire tube extending longitudinally from the front end of the tank interiorly thereof toward its back end. Wet glycol is admitted to the base of the still column above a half tray and overflows into a catch pipe which drains into the front end of the tank. Dry glycol is taken off through an outlet at the bottom rear of the tank. Dry gas is admitted to the reboiler through a sparging pipe extending longitudinally of the tank from near the back end of the fire tube and then over the outlet to near the back end of the tank. A box shaped trough extending under and about the pipe separates the glycol adjacent the sparging pipe from an in-tank reservoir located below the pipe formed by a divider plate located near the front end of the pipe.

Abstract: A graphics generator responds to signals defining a pattern to be displayed. The pattern comprises a plurality of pattern segments each of which may be a vector, conic or alpha numeric character. The graphics generator produces digital signals which are capable of driving a display through an A/D converter to produce a visual representation of the desired pattern segment. The pattern segment is broken up into a plurality of strokes of constant length regardless of orientation. Chaining the strokes on the display thus produces the desired pattern. An input signal defining a vector defines both the length and the orientation of the vector and these quantities are stored in length and orientation registers, respectively. The orientation signal is employed as an address into a sine/cos memory to derive stroke components in an orthogonal coordinate system which are then added to a beginning position of the stroke to produce the stroke end point.

Abstract: A deglitch circuit is provided to connect a source of changing voltage or current to a utilization device to eliminate unwanted voltage excursion contemporaneous with changes in amplitude. The deglitching circuit includes one transformer winding with a center tap connected to the source and a pair of serially connected diodes connected to terminals of the winding. Another winding of the transformer is connected to a source of potential through switches which allow the other winding to alternately conduct current in one or another sense. Changes in the sense of current conduction through the other winding induce a voltage into the one transformer winding. Depending on the change in current this voltage may forward bias the diodes and provide the effect of a closed switch between the source and the circuit output, which is taken at the junction of the diodes.