Abstract: A videoconferencing network for digital computer workstations that operate on a local area network (LAN) to exchange data. The network includes a signalling local area network (A-LAN), connected to a first port of a plurality of workstations, for transmitting and receiving data signals between selected ones of the workstations and a broadband local area network (B-LAN) connected to a second port of the plurality of workstations, for transmitting and receiving television signals between selected ones of these workstations. Each television signal is transmitted at a selected frequency channel so that no two transmissions interfere. A software program, stored in and operable on the computer of each workstation, generates and receives data messages, transmitted via the A-LAN, to and from the computer of another workstation, respectively.

Abstract: An array of tines are connected to and extend out from a rake head support bar at right angles thereto and are connected thereto in two sets with shank portions of a first set of tines disposed in a first plane and shank portions of a second set of tines disposed in a second plane parallel to said first plane. Action ends of the first set of tines are disposed in a first row which is parallel to and spaced further from said rake head support bar than action ends of the second set of tines which are disposed in a second row. A coil spring is formed from the material of the shank portion of each of the tines so as to unwind if a force is applied to the tine as in effecting a raking action. An alternate embodiment includes a third set of tines similar to the first and second set but with its shank portions in a third plane parallel to the first and second planes and with its tine ends in a third row parallel to the first and second rows.

Abstract: A seal is in the form of a continuous annular strip (3) of elastic material. The seal is intended for insertion between a housing (1) and a lid or cover (2). The surfaces of the sealing strip facing the housing and lid are provided with thicker areas in the form of beads (4). The beads are separated and rest independently liquid-tight against both the housing and the lid. One bead rests off the lid and against the housing and the other rests off the housing and against the lid.

Abstract: A method of, and a device for positioning an X-ray cassette (5 or 10) in relation to a source (1) of X-rays that emits radiation in a specific preferred direction (A). Another beam of radiation is emitted parallel to that direction at a specific distance (d) therefrom. The other beam is intercepted by a positioning device (20) secured to the cassette. The device produces a signal as long as the angle of incidence of the other beam does not exceed a specific threshold angle (.theta.) with respect to the normal to the cassette.

Abstract: An array of tines are carried by a frame assembly so that the tines of the tine array are spaced one from the other across the assembly and so that ends of alternate tines form two rows of tine ends. The frame assembly is made of hollow pipe rods connected together by elbows, pipe, connectors and "T"s and so that one end of each tine is lodged in a first rod and the tines extend through a second rod. A bias rod extends across the tines and is spring urged against the tines proximate free ends thereof. Prongs, either separately formed, or extensions of the tines extend out from the frame assembly in a direction opposite to that of the tines. A removable push handle is pivotally carried by the frame assembly for movement between a first or raking disposition and a second or collection disposition. The push handle, when removed, is disposable on the frame which may thereafter be carried by a carry handle also secured to the frame assembly.

Abstract: A method of and apparatus for measuring the optical density of an original, especially a three-color negative, from which photographic prints are made, to control how much printing light of each color penetrates the original when the image is projected onto a color print medium that is sensitive to these colors. The spectral sensitivity of the measuring apparatus is adjusted to that of the print medium. Measuring light is projected through the original and is resolved into at least one spectrum. The intensities of the light at the various ranges of wavelength are weighted and totaled in accordance with the spectral sensitivity of the particular print medium. Light valves with translucencies that can be adjusted to the sensitivity of the print medium to that range of wavelengths are distributed along the spectrum. The accordingly weighted intensities of the light of each color are separately sensed and measured.

Abstract: A plurality or spaced side walls of flexible cloth-like material extend up from and are secured to a bottom wall, of the same material and define therebetween an interior space for a fisherman's tackle bag. A pair of interior pockets are formed within the interior space and a plurality of exterior pockets are secured to outer surfaces of the side walls; the pockets being of a size and configuration to house fishing tackle. A hollow tube is secured to and rises up from the bottom wall through which an opening is formed in alignment with the hollow in the tube so that the tube may be positioned about the vertical support post of a fisherman's chair to position the tackle bag and tackle in the space between the chair bottom and the deck of the boat to which the chair is mounted. At least one drain hole extends through the material of the bag leading from the interior space.

Abstract: A hook is provided for the grip end of a rod-like golf accessory in the form of a golf ball retriever. The grip outer surface is formed with a sinuous outer surface having concave and convex sections. An arm extends out proximate a top of the grip and a leg extends out from the arm down parallel to the grip and spaced from an outer surface of the grip. A distal end of the leg is angled in towards the grip surface to provide a narrowed entry into the space between the hook legs and the grip outer surface. The hook arm and legs are almost as wide as the narrowest part of the grip relatively thick to provide substance to the hook and somewhat flexible to facilitate flexure of a distal end of the hook leg when hooking the device over an upper edge of a golf bag.