Abstract: In a paint spraying booth having a fresh air inlet at one end and an exhaust at the other end, the inlet end is provided with a solid end wall and a filtering wall parallelly spaced therefrom. Through the ceiling of the booth and in the region between the end wall and the filtering wall, one or more air-inlet vertically-disposed pipes is coupled. The lower end of the pipe terminates within the booth and between the end wall and the filtering wall while the upper end extends several feet upward above the ambient dust and dirt in the atmosphere. At the exhaust end, a pair of doors are provided and on each side of the doors are vertically disposed compartments having vertical filtering walls and being coupled to an overhead duct to expel the air into the atmosphere.

Abstract: The hydraulic knee control for a prosthetic leg has a cylinder and piston assembly. In addition, within the cylinder is disposed a free floating plug so that the space between the free plug and the head end is filled with air or a compressible fluid, and the spaces between the free plug and the crank end is filled with a liquid or hydraulic fluid. The piston is disposed within this liquid and has sealing means which prevents the liquid from bypassing therearound. Disposed outside of the cylinder are two bypass passageways wherein one end of each passageway communicates with the cylinder in the region between the piston and crank end and the other end of each passageway communicates with the cylinder in the region between the piston and the floating plug.

Abstract: A fish hook extractor has an elongated body with a handle means at one end and, at the other end is disposed a fish hook gripping means for gripping the fish hook for removal from the fish. This latter means is shaped essentially like a 2-prong fork wherein each prong has parallel sides and the prongs are parallel to each other. Each prong is preferably wider in the dimension disposed in the plane of the prongs than in the thickness, i.e., in the dimension perpendicular thereto. The base where the prongs come together is formed into a semi-cylindrical surface and coaxial with this semi-cylindrical surface are formed opposing counter-sunk surfaces each disposed on one side thereof. The ends of each prong are tapered to a point wherein the points are disposed on the outer edges of the respective prongs.

Abstract: A boat hull has a bottom formed with a modified V-shaped longitudinal surface forming the keel and has a tunnel surface disposed on each side of the keel. Both tunnel surfaces have substantially vertical and parallel side surfaces connected by a substantially horizontal surface which is parallel to a base plane in a transverse direction. The outboard side surfaces of each tunnel surface have a transition portion starting aft of the midship section which portion transforms to a respective incline surface at the stern, which surface slopes outwardly and downwardly. The hull also has an outboard flat bottom disposed on each side of the tunnel surfaces. Inboard of each tunnel surface, the modified V-shaped keel has inclined longitudinal surfaces inclining upwards towards the centerline.

Abstract: An electric penetration assembly for passing electrical conductors through the wall of a pressure vessel has at least one hermetically sealed electric feed-through conductor surrounded by an insulator. The insulator is symmetrical about an axis parallel with the conductors and is impervious with a pervious means disposed between the ends. The insulator is shaped wherein an external conical section is disposed between two external cylindrical sections and wherein the pervious means communicates with the conical section. The assembly is inserted into a header plate having at least one transverse aperture formed with a female conical section disposed between two female cylindrical sections. In the female conical sections are formed two axially spaced grooves for accepting O-ring type gaskets and the plate has at least one capillary bore formed therein which communicates with the conical section and with one face of the plate.

Abstract: This system is economic and trouble free and has a cylindrical wall chamber formed on the top of an inverted water bottle that is elevated above the floor. A chamber communicates with the water bottle through a hole formed therein. Near the lower end of the cylindrical wall an opening is formed to allow a short tube to extend through the wall substantially tangent thereto. Above the tube and fixed to the interior of the wall is an apertured disc. Between the apertured disc and the bottom of the chamber is disposed a spiral wall with one end fixed to the cylindrical wall so that a spiral passageway is formed, communicating with the tube. Within the chamber is placed a piston which is free to slide axially up and down. Hanging from the underside of the piston is a rod which holds a valve gate disposed to seal the opening between the bottle and chamber. The rod also supports, on its lower end, a stopper or plug which is disposed to seal the neck of the bottle.

Abstract: In a cold box having an outer container and an inner liner with the space therebetween filled with insulation and having an access opening capable of being closed with a door, a breaker strip is provided around the opening, fixed to both the outer container and the inner liner. The breaker strip is substantially a flat elongated member having two parallelly spaced flanges protruding from one side and extending the length thereof. The outer container is provided with an inwardly disposed flange disposed around the opening and the inner liner has an outwardly disposed flange, also disposed around the opening. Along each edge of both flanges is formed a U-shaped channel to receive a respective one of the flanges on the breaker strip. Male and female snap-type locking means are provided on each flange of the breaker strip and on each U-shaped channel, respectively, to secure the two when the two items are assembled.

Abstract: A grinding wheel is rotatably mounted on the end of the boom which pivots about a horizontal shaft on its other end. The shaft is suitably mounted on a frame which is disposed thereunder which is, in turn, mounted on a pair of stationary horizontal tracks to enable the frame to move perpendicularly to the shaft. An elevation control hydraulic piston and cylinder assembly is coupled between the boom and frame to rotate the boom upward. A horizontal control piston and cylinder assembly is coupled to the frame and an anchor to move the frame along the tracks. A hydraulic pump provides pressurized liquid to both cylinders through a valving arrangement. The valving arrangement has an automatic timer that alternately supplies pressurized fluid to the head end and to the rod end of the horizontal control cylinder while this cylinder progressively causes the frame to advance along the tracks.

Abstract: Cylindrical water tanks, such as used for water softeners, inherently corrode at the bottom and herein is taught that the tanks are repaired by removing the bottom dish with the use of a novel tool that moves around the tank and bears there against with a substantially uniform force thereby readily following the tank's contour, by sandblasting the interior for cleaning, by installing a new bottom dish to the cylindrical body with the use of a novel tool that automatically stops further penetration of the dish into the tank when a predetermined overall height of the tank is obtained, by welding the bottom dish to the body, by coating the interior with a non-corrosive plastic with the use of a novel spray gun apparatus that radially sprays the liquid plastic onto the inner walls of the tank as the spray nozzle moves axially therein and then the spray nozzle is adjusted to cause the spray to form an upward diverging cone to coat the underside of the top cover, and finally by allowing the plastic to harden.

Abstract: A two-pole switch is placed in series between two lengths of a coaxial cable that extends from a transceiver to an antenna. When the switch is in the first pole position, little or no resistance or impedance is added to the circuit, and when the switch is in the second pole position, a resistor is added in series with the center conductors of both lengths and another resistor is connected across the center and outer conductor of the coaxial cable. Preferably this other resistor is an incandescent lamp so that the operator of the transceiver, when broadcasting, has a visible indication showing in which pole position the switch is, because now most of the output power of the transceiver passes through the lamp to light it.

Abstract: A pair of improved adjustable cross-frame members are incorporated with a pair of side frame members to form a bed frame readily adjustable to a wide variety of widths. Each improved cross-frame member has a first and second elongated elements, each of which is pivotably connected to respective side members in a standard manner. The first element is provided with a pawl mounted near its free end and the second element is provided with a plurality of teeth. The teeth are shaped to allow for easy movement when the side frame members are moved toward each other and to allow for resistance when the side frame members are being pulled apart from each other.

Abstract: A fishing rod holder has a pointed post capable of being pushed into the ground, and pivotable member pivotably mounted on the upper end of the post. This member is designed to hold and support the handle of a fishing rod. A spring is provided co-acting between the member and the post to cause the member, when not restrained, to raise the forward end of the fishing rod. Protruding horizontally from the post is a structure which slidably supports an elongated sear. Another spring is provided to urge the sear toward the post. Depending from the forward end of the pivotable member is a keeper having a hole at its lower end. The purpose of the hole is to be engaged by the sear when the sear is in an extended position. The first mentioned spring provides a friction force between the sear and its support structure which force is sufficient to prevent the second mentioned spring from urging or retracting the sear towards the post.

Abstract: A bicycle lock is disclosed wherein the steering is locked and a securing cable is provided to fasten the bike to a fixed object. The lock is provided with a removable tumbler, having an axially aligned pin, that normally passes through an eyelet on one end of the cable and through suitable bores, in the steering post and the rotating steering sleeve, respectively.