Abstract: Drycleaning fluid is recovered from spent drycleaning fluid filter elements by passing steam through the elements to form a steam/drycleaning-fluid vapor mixture. The mixture is condensed into liquid state and the two constitutents are separated. The apparatus includes a condensing chamber and a separating chamber with a novel valve for ensuring that drycleaning-fluid vapors do not escape into the work area.

Abstract: A photographic camera for three-dimensional photography has a housing which includes an opening to the interior on a forward side thereof and an aperture moveable transversely across the opening for selectively admitting light rays through the opening. Within the housing are located optical means for focusing the light rays along an optical path to a location adjacent the rearward side of the housing. At the rearward side of the housing there is located mechanical means for moving a planar object synchronously and in the same direction with the aperture. The improvement comprises an assembly for permitting the camera to accept a large number of film sizes and formats loaded in removeable, light-tight film holders. The assembly is especially useful in adapting the camera for use with Polaroid-type film. The assembly includes a sliding frame which is attached to the mechanical movement means of the camera for synchronous movement with the aperture.

Abstract: Arthrograms of the knee permit visualization of the soft tissue components of the knee joint. This is particularly important in the diagnosis of lesions of the menisci, especially tearing lesions. A device is disclosed which includes a novel clamp for supporting and restraining the patient's leg in a precise position in front of a unique film holder. A novel arthrographic protractor indicator is also provided to permit the technician to accurately identify the exact degree of knee rotation depicted in each radiograph. The device is uncomplicated, compact, and is constructed in a uniquely adjustable manner which permits accurate arthrographic studies of either the right or left knee in any size of individual. The arthrogram radiographs obtained with this device are clearer, more accurate and precisely reproducible, if necessary. All of these advantages are accompanied by greater comfort and far less radiation exposure to the patient, and to the radiological personnel.

Abstract: Drycleaning fluid is recovered from spent drycleaning fluid filter elements by passing steam through the elements to form a steam/drycleaning-fluid vapor mixture. The mixture is condensed into liquid state and the two constituents are separated. The apparatus includes a condensing chamber and a separating chamber with a novel valve for ensuring that drycleaning-fluid vapors do not escape into the work area.

Abstract: A sign structure which may be supported from aircraft, and especially helicopters. The structure is comprised of three distinct sections which may be compactly transported and then easily assembled and connected around the landing gear on the underside of the aircraft. The structure provides an aerodynamically stable frame which may be supported in a direction transverse to the longitudinal axis of a helicopter. Novel electrically controlled light assemblies are attached in a rectangular matrix on the structure for displaying a desired illuminated message.

Abstract: A collapsible shopping cart child seat is utilized in conjunction with conventional shopping cart seat structures in order to help restrain small children from climbing in the cart and to help prevent the child from falling laterally to either side, thus providing a safer seat structure. The child seat of the invention may be fully collapsed and carried in a woman's purse to the supermarket. The seat may then be unfolded and easily secured together to form a seat having side restraining flaps. A single strap both attaches the seat within the cart and acts as a child-restraining safety belt. The seat according to the invention is extremely simple and economical in construction while providing superior durability.

Abstract: Rigid nylon articles are provided with a chamber therewithin and water is sealed within the chamber. The water is in continuous contact with the nylon and is absorbed by the nylon over a long period of time to increase and maintain the maximum impact resistance of the nylon article.

Abstract: A minimum number of economical component parts may easily be assembled at the location of installation to form a tank support assembly which will hold one, two, three or more tanks in a stable and safe manner. The assembly is comprised of a pair of base members, each including a pair of upwardly directed sockets. A vertical post member is inserted into and held within each socket, and flexible support straps are hung between opposed hanger brackets which are affixed to each post member. The tank or tanks are then held in place between the post members on a longitudinally-spaced pair of support straps. The number of tanks which can be supported by the assembly is determined only by the height of the post members and the number of hanger brackets thereon.

Abstract: A multipart plastic hub assembly includes a pair of hub members each having an annular inner rim portion, a tire support portion, and a radially extending web portion therebetween. The inner rim of each hub member is notched at circumferentially-spaced intervals therearound in order to facilitate radial flexure thereof and radially inwardly directed detents are positioned on the axial outermost end of each rim portion. A tire of rubber or the like is placed between the two hub members and a center core is inserted through each of the inner rims. The hub members are then brought together in abutting relationship so that the tire is captively retained within the tire support portions and the inwardly directed detents are received in annular grooves formed in the center core adjacent respective ends thereof, to thereby form and retain the integrity of a composite wheel assembly.

Abstract: An adapter for connecting a corrugated hose, e.g., a washing machine drain hose, to a standpipe has an elongated tube with a bell at one end for holding and retaining the corrugated hose. A curved support extends from the bell end of the tube and selectively supports the hose in a desired curve of from 0.degree. to 180.degree.. A sliding annular retainer ring slides on the curved support and selectively locks the corrugated hose in the chosen position. Outwardly extending ears on the end of the curved support hold the retainer ring on the adapter. The tube has longitudinal ribs over at least a portion of its length. The ribs provide additional strength and tapered portions on the ribs prevent the tube from jamming in a standpipe and provide for easy release. The ribs have enough friction to retain the tube in the standpipe in cooperation with the weight of the assembly and the water therein to prevent the hose from being forced from the standpipe by the jet effect of water moving therethrough.

Abstract: A filter cartridge utilized in filtering dry cleaning fluid includes an annular, generally cylindrical outer member which carries a tubular, pleated paper filter and an annular, generally cylindrical inner member which carries a particulate sorbant mass therewithin. In conventional use, dry cleaning fluid is caused to flow radially inwardly through the filter cartridge, first passing through the pleated paper filter and then through the sorbant mass. The fluid exits through a longitudinal passageway extending axially through the cartridge. After the filter cartridge has been spent, the inner member may be slidably removed from the outer member in order that the considerable weight of the spent cartridge may be removed from the filter tank in two separate operations.

Abstract: Collapsible child seats especially for use with conventional shopping carts and having side restraining flaps for preventing a child, and especially an infant, from falling laterally to either side. According to one preferred embodiment of the invention the fully collapsed seat may be carried in a woman's purse to the supermarket where it is easily unfolded and secured in the shopping cart. In other preferred embodiments, the invention is permanently attached to the shopping cart for use in transporting an infant and is collapsible in a unique manner to allow for the use of the seat without the side restraining flaps as, for example, in the case of the transporting of an older and larger child, and the seat may be further positioned to permit the shopping cart to be utilized without the child seat.

Abstract: Disposable cleaning devices, preferably constructed entirely of paper, having a conically shaped head with a jagged or tacky exterior surface for clinging to and removing cob webs and the like from hard to clean areas such as corners. A hollow stem portion connected to the conical head is sized to fit onto and frictionally engage the ends of standard broom handles and the like to provide simple inexpensive means for cleaning ceilings and other normally out of reach locations.

Abstract: Tanks for storing materials, especially liquid and semi-liquid materials. The tank wall is formed of a plurality of arcuate panels, each fabricated from vertically stacked precast concrete panel sections, which are joined by vertical pilasters, each pilaster formed from precast concrete pilaster sections. The wall is prestressed by tensioned tendons disposed on the periphery thereof. Each of the pilasters are supported by a separate footing and the ends of the arcuate panels are likewise supported on the footings. The footings are interconnected by a novel stabilizing structure to withstand seismic loading. These as well as numerous other novel structural features provide for a storage tank of modular construction, which is strong, stable and versatile; which may be constructed in a facile manner; and which may, if desired, be easily dismantled for relocation.

Abstract: An electrical termination for use with a high voltage underground cable system wherein a large degree of arcing may occur between two electrical structures as they are brought together under short circuit conditions to complete a live high voltage circuit. Gas generating material is included as part of at least one of the structures such that gas is produced by the arcing between the structures as they are moved towards each other to form the desired electrical connection. The pressure build up of the gas within the termination acts upon a movable gas actuated means to cause movement thereof when the structures are brought close together under fault conditions. When moved by such a pressure build up, a portion of the gas actuated means transfers the arcing to a position away from the gas generating material to cause the cessation of gas production and thus permits the structures to couple and complete the circuit.