Abstract: A photographic printer has a punch marking module for placing cut and end-of-order marks on the photographic paper. A quick connect/disconnect mounting assembly automatically centers the punch marking module properly with respect to a paper mask. The quick mounting assembly includes a pair of detent bars and registration pins on a mounting base attached to the paper mask. A rigid member and a pair of plate holders form the bottom of the punch marking module. A plurality of ball plungers engage a plurality of recesses in the detent bars and the end plate holders engage side edges of the mounting base. The ball plungers apply a force to the rigid member holding it against the registration pins in an engaging relationship.

Abstract: The flat belt tire tester which permits mounting a wheel and tire to be tested about an axis positioned above a flat belt, and has framework and controls for lowering the tire into contact with the belt under desired loads, using desired adjustments for camber and steering. The belt is powered, and can thus be used for testing the tire under simulated road conditions. The mounting framework and belt mounting construction of the present invention provides substantial rigidity through having the mounting frame geometry properly oriented in relation to the contact surface of the belt and also by providing a stiff frame for the belt mounting drums or pulleys.

Abstract: A photographic printer includes large area transmission density (LATD) sensors and a digital processor, such as a microprocessor, which calculates red, green and blue exposure times based upon the LATD sensor values. Prior to an exposure cycle, the LATD sensors are initialized, and LATD sensor readings are taken. From these initial sensor readings red, green, and blue initial exposure times are calculated, and an exposure cycle is initiated based upon these initial exposure times. During the exposure cycle, additional sensor readings continue to be taken on an asynchronous basis, and red, green, and blue exposure times are recalculated each time a reading is taken. The exposure times used during the exposure cycle are continuously modified and updated as a function of the recalculated exposure times. A running average of the sensor readings is maintained, and the modified exposure times are based upon a weighted average of the most recent sensor reading and the running average.

Abstract: A small, accurate, reliable and economical pump which is particularly useful in intravenous (IV) feeding includes a disposable pump chamber and a pump housing. The disposable pump chamber has an inlet, an outlet, and first and second flexible rolling diaphragm pumping chambers. First and second cylinders in the pump housing are positioned to receive the first and second flexible rolling diaphragms of the disposable pump chamber. First and second pistons are movable in the first and second cylinders, respectively. In addition, first and second valves are provided in the pump housing. The first valve controls fluid flow between the inlet and the first flexible rolling diaphragm pump chamber, while the second valve controls fluid flow between the first flexible rolling diaphragm pumping chamber and the second flexible rolling diaphragm pumping chamber. A motor and cam shaft drive the first and second pistons and the first and second valves.

Abstract: A photographic printer has a punch marking system for placing cut and end-of-order marks on the photographic paper. The punch marking mechanism is adjustable to accommodate different widths of print paper. The punch marking mechanism includes guide rods which are positioned transverse to the path of the print paper. First and second carriage assemblies are movable along the guide path defined by the guide rods on opposite sides of the center line of the paper path. A lead screw moves both the first and second carriage assemblies along the guide path in an essentially symmetrical manner about the center line of the paper path. Interchangeable inserts of different widths may be inserted between the carriages to define a spacing between the first and second carriages for a desired paper width. The punches or other marking devices are carried on the first and second carriage assemblies.

Abstract: A photographic printer includes incremental correction buttons or keys to permit the operator to request incremental color or overall density corrections. In addition, preset correction keys are provided which allow the operator to request a correction for a recognizable cause of off-balance prints such as incandescent or fluorescent lighting or snow scenes. The preset correction keys represent the desired correction for these recognizable causes which represent a combination of more than one incremental color or density correction.

Abstract: A large scale solar heat collector system which utilizes a building design to permit substantial areas of perforated heat collector sheets to be mounted and through which sheets air is passed to transfer the heat from the collector sheets to the air. The collector sheets are supported and mounted in a manner so that they can expand and contract under thermal variations even when exceedingly large areas are used to thereby permit mounting collector sheets that have a substantial area in a low cost, economical wy to permit large amounts of heat to be collected and stored in a single installation.

Abstract: A wood burning furnace includes a combustion enclosure made up of a lower closed generally rectilinear fire box which is defined at an upper portion thereof by a semicylindrical roof dome and a top cylindrical-shape smoke chamber supported on a rearward upright cylindrical smoke conduit and a forward upright smoke conduit, these conduits being supported on the fire box roof dome and open between the smoke chamber and fire box. The combustion enclosure is supported inside of a furnace shell above a fan compartment in that shell. The furnace shell and heating air baffles fastened to it are so constructed as to provide a heating air passage between the combustion enclosure and shell, and a blower in the fan compartment forces air from outside of the shell over the surfaces of the combustion enclosure and out the top of the shell to a location for use of heated air.

Abstract: An equipment trailer, and more particularly a trailer adapted for hauling large boats and similar objects which has self-lifting framework, is adjustable in lateral width so that it can be used for hauling wide loads, and may be converted to a narrower width for empty transport merely by operation of a hydraulic cylinder that operates through linkages to cause the side rails to be moved in or out relative to a central axis. The unit includes removable cross members and specifically designed removable hangers for such cross members that are attachable to the longitudinal side frame members when the unit is to be used, and which are quickly attached and detached from the side frame members.

Abstract: A system for the magnetic confinement of a plasma for purposes such as the facilitating of thermonuclear fusion reactions. In one form, the major confining field is generated such that in local regions the magnetic field intensity increases with increasing distance from the central part of the confinement space. This provides a strong confinement in those local regions. The currents generating the major confinement field are time varying such that the local strong confinement regions move relative to each other and pass through the entire confinement space. Thus, the plasma is generally pumped through local strong confinement regions, and all parts of the confinement space are periodically subjected to a strong confining field.

Abstract: A parking lot gate is provided with a flexible connector between the elongated gate arm and the arm drive mechanism to prevent breakage of the gate arm or the arm drive mechanism. The flexible connector includes a first connection plate connected to the arm drive mechanism, a second connection plate connected to the gate arm, and first and second coil springs connected between the first and second connection plates. The first and second coil springs are positioned essentially parallel to one another and in an essentially vertical plane.

Abstract: A key ring holder of the type designed to be supported by a belt, including an elongated loop member adapted to surround and be retained by a belt, the loop member having secured thereto an eye which projects outwardly from the loop member and which carries a spring clip for holding a key ring spaced outwardly from the body of the wearer. The outer wall of the loop member preferably diverges outwardly from the inner wall from the top to the bottom so that it can be used for belts of different thicknesses. In one form, the ring may have secured thereto by means of a flexible wire a second ring so as to permit dividing the keys into two groups each of which is carried by a separate ring.

Abstract: An extruded radiant energy transparent cover used with solar heat collector assemblies, and made into modules that are retained in position with support members which securely hold the cover in place. The extruded cover panels are of preferably elongated side by side tubes molded with common walls. A support rib is aligned with each of the walls. Where two of the modules join, two support ribs are placed contiguous, and are held in the same support members as the single ribs. Thus the installation is simplified by the lack of necessity to provide special brackets for holding the modular sections together.

Abstract: A film or paper drive system for use in photographic film or paper cutters allows the operator to position the film or paper accurately and rapidly by actuating a switch. The film or paper is driven a predetermined distance at a first rate in response to actuation of the switch. If the switch remains actuated after a first period, the film or paper is driven at a second rate. If the switch still remains actuated after a second period, the film or paper is driven at a third, higher rate.

Abstract: A hanger for mounting elongated members relative to a wall surface which permits alignment of the elongated member in a direction perpendicular to the surface, and also in both directions along the surface. The uses of the hangers find particular application in hanging elongated fluorescent light troffers or mounting tubes, and for mounting other devices such as a lighted hand rail or an unlighted hand rail for stairways.

Abstract: An air filter for use on internal combustion engines which operate primarily in heavy dust conditions, and which includes a mounting member as part of the air filter housing that permits the spinning of the air filter cartridge for centrifugal cleaning in place on the internal combustion engine, without removal of the filter cartridge from the air filter housing.

Abstract: A digital system for generating waveforms includes a word oriented digital memory which stores a plurality of digital words containing data and instructions. The words of the word oriented digital memory are addressed in a predetermined order, and the instructions contained within each word are executed. These instructions include loading data into either an amplitude comparison register, an amplitude output register, or a variable clock, performing a ramp operation, or performing a time delay operation. Waveforms are generated using slope segments, amplitude jumps, and amplitude plateaus.

Abstract: An automatic photographic paper cutter cuts photographic prints from a strip of photographic paper which bears cut indicia indicating the locations of desired paper cuts. An indicia sensor is positioned in fixed relationship with respect to the paer cutter knife assembly at a distance less than the shortest length of print to be cut. The paper cutter derives and stores a feed-after-sense signal, which represents the length the paper strip must be fed after a cut indicium is sensed in order for the strip to be cut at the desired cut location represented by that cut indicum. During automatic operation of the paper cutter, the photographic paper strip is advanced until a cut indicium is sensed, is advanced by an additional distance determined by the feed-after-sense signal, is stopped, and is cut at the desired cut location.

Abstract: A linear DC power supply provides high efficiency with substantially lower total capacitance than prior art linear DC power supplies. The power supply includes first and second input terminals, first and second output terminals, a center tap transformer, first and second capacitors, first and second charging circuits, and first and second discharging circuits. The center tap transformer has a primary connected to the first and second input terminals and has a secondary with first and second phase terminals and a center tap terminal which is connected to the second output terminal. The first charging circuit is connected to the secondary and the first capacitor to fully charge the first capacitor during a first portion of each cycle. Similarly, the second charging circuit is connected to the secondary for fully charging the second capacitor during a second portion of each cycle.

Abstract: A film cleaning apparatus for cleaning the photographic film prior to printing includes special guides which permit the film cleaning apparatus to be used with both first-run production and tabbed reprint production. The film cleaning apparatus is of the type having a pair of support members in opposed relationship which define a nip which is disposed transverse to the path of the photographic film. Two lengths of soft, lint-free wiping cloth extend through the nip with the opposed surfaces of the cloth at the nip defining a part of the path. The guide includes first and second generally parallel guide plates having opposing surfaces defining an opening which is part of the path. The opening defined by the guide plates has an inlet end and an outlet end, and the plates are in fixed position with respect to the film cleaning apparatus with the outlet end of the opening proximate the nip.