Abstract: A circuit is coupled to an external power supply and is coupled to a non-live zero, two wire DC current transmitter (e.g. 4-20 MA output) for converting such current to a live-zero DC output current signal (e.g. 0-20 MA output) and for powering such transmitter. The circuit has a first current to voltage converter for converting the transmitter current signal to a voltage signal, and a second current to voltage converter coupled to receive the circuit output current signal and an offset current from an offset current source for converting the sum of the circuit output and offset currents to a second voltage signal. A comparator is used for comparing the first and second voltage signals to provide the live-zero output current signal representative of the non-live zero transmitter signal. The circuitry can also provide isolated power to the transmitter and feedback (closed loop) control of such power.

Abstract: A slide mounter includes a magazine for holding a stack of slide frames. A slide ejector pushes the lowermost slide within the magazine out of the magazine and into a slide track, where the slide frame is opened to permit insertion of a film transparency. A slide separator separates the stack of slides into an upper stack above a predetermined level and a lower stack below the predetermined level within the magazine. An out-of-slides inhibitor connected to the slide separator prevents movement of the slide ejector when the slide separator moves to a position indicating that there are no further slides in the upper stack.

Abstract: A connector device attaches the leading end of a photographic print paper web to a leader belt of a photographic print processor and leads the print paper through the processor. The device includes a belt clip, a leader bar, a pull bar and a flexible connective flap member. When the belt clip is initially attached by an operator to the leader belt, the leader bar (which is rigidly attached to the belt clip) is in a first position which is generally perpendicular to the leader belt. The flexible connective flap member connects the leader bar and the pull bar in a fixed nonparallel relationship. A leading end of the print paper web is attached to the pull bar. When the leader belt is placed in motion, tension is transmitted from the leader belt through the connector device to the print paper web. The tension causes the leader bar to move from the first position to a second position with respect to the leader belt which results in the pull bar moving to a perpendicular position with respect to the leader belt.

Abstract: A thermally insulating fuel filter cover provides thermal insulation of the fuel filter of a diesel engine such as is used in the trucking industry. The cover is a flexible cylindrical body of thermal insulating material such as expandable urethane foam which has a closed end, an open end, and a hollow interior portion for receiving the fuel filter. The cover is slidable over the fuel filter and is flexible so as to form a friction fit. The cover encloses the exposed surfaces of the fuel filter and provides thermal insulation to help prevent waxing and freeze-up of the fuel in the fuel filter in cold weather.

Abstract: A paper feed system for a photographic printer which includes a motor driven takeup spool which pulls paper from a supply reel across a paper deck to the takeup spool. An encoder is turned by the paper, and provides encoder pulses which indicate incremental rotation of the encoder, and thus incremental movement of the paper. Prior to each paper feed cycle, a slow-down count is subtracted from a total feed length count to provide a high speed count. The motor is initially operated at high speed until the encoder has produced pulses equal to the high speed count. The motor is then switched to the low speed for the remaining portion of the paper feed corresponding to the slow-down count. During each paper feed cycle, the encoder pulses during the high speed portion of the paper feed are monitored to provide an indication of the average velocity of the paper during the high speed feed. The slow-down count for each paper feed cycle is a function of the average velocity from the previous paper feed cycle.

Abstract: A device for applying dental floss between the teeth including a frame having a handle and a trigger. A motor and drive shaft is mounted in the frame, including motor control means operably connected to the trigger and power source means for supplying power to the motor. A drive wheel and a plurality of guide pulleys are positioned in the frame to define a path for a closed loop of dental floss under suitable tension. The path includes an open span sized to permit passage of the dental floss between a person's teeth. The drive wheel is positioned to engage the drive shaft to cause rotation of the wheel by the motor.In a preferred embodiment, the frame includes a first portion mounting the motor to permit the drive shaft to extend outward from the first portion of the frame and a second portion mounting the guide pulleys and the drive wheel to position the dental floss loop.

Abstract: An insulation material having relatively high moisture permeability, includes an inner sheet of expanded polystyrene of substantial thickness. Attached to the polystyrene is an impermeable kraft supported aluminum foil outer layer having the paper side facing the polystyrene. An adhesive layer is provided to join the outer layer to the inner layer. Finally, a plurality of moisture permeation creating perforations are intruded through the outer layer and the adhesive layer and extend into the inner layer to render the outer layer and adhesive layer moisture permeable. The perforations are formed by bonding the layers with the adhesive, allowing the adhesive to set and thereafter passing the bonded layers against a means for forming perforations.

Abstract: Flat metallic varnish-coated metal stampings or laminations to be deburred are conveyed by contiguous vertically aligned pairs of horizontal rollers across the top of a plurality of deburring cells or vats which are continuously overflowing with an electrolyte. Alternate cells are equipped with positively and negatively charged electrodes. The electrolyte is continuously supplied to each of the cells at a rate such that the electrolyte overflows the lips of each cell over which the lamination approaches and retreats from the cell. In this manner, the top surface of the electrolyte is maintained above the top surface of the lamination so that the electrolyte inundates at least the burrs on the edges of the lamination. Current flow from each positive electrode through the electrolyte, the stamped burred edges of the laminations and to the negative electrode causing the burrs on the laminations to be removed by anodic action.

Abstract: A grab mechanism device for transporting a plurality of vertically oriented plates having lift lugs from a holding container such as a vat. The grab mechanism is mounted on a vertically movable load frame. The grab mechanism and load frame overlie the vat. An aligner frame is slidably mounted relative to the load frame and has guides for aligning said aligner frame with the holding container and also overlying the plates. The load frame can be lowered relative to the aligner frame forming part of the grab mechanism in position to engage the lift lugs of the plates. The grab means is selectively controlled to engage a set of the plates in the container or vat.The plates are lifted out of the container by lifting the load frame and grab mechanism relative to the aligner frame.The aligner frame includes "combs" for interdigitally separating the bottom of the plates from one another after the plates have been lifted from the holding container.

Abstract: A photoprocessor for photosensitive webs includes a plurality of tanks containing photoprocessing solution and a dryer. The web is transported through the tank by a plurality of opposed spaced pairs of oppositely oriented driven tapered rollers. The transport speed of the web through the tank is determined by a pair of opposed cylindrical rollers at the exit of the last tank. The cylindrical rollers are driven at a tangential velocity which is approximately equal to the tangential velocity at the centers of the tapered rollers. A loader at the inlet end of the processor includes driven and idler rollers which are normally out of engagement and which are brought into engagement to drive the web into the processor for a selected time period when the web is first sensed at the inlet end of the processor.

Abstract: A two-way mirror device for vehicles, and particularly for use as a side view mirror on heavy duty and medium duty commercial transport vehicles. The device includes a frame for holding mirrors, including a mounting means for mounting the frame on a vehicle. A semi-transparent plane mirror is mounted in the frame and positioned to permit viewing through the mirror and reverse reflected off of the mirror. A semi-transparent convex mirror is mounted in the frame and positioned to permit viewing through the mirror and an enlarged field of view reverse reflected off of the convex mirror. Finally, transparent backing means are attached to the frame for holding the plane mirror and the convex mirror such that forward viewing through the mirrors is also through the backing means. In a preferred embodiment, the vertical axis of the convex mirror is independently adjustable with respect to the plane mirror axis.

Abstract: The present invention relates to a current controlled pressure regulating apparatus for operating pneumatically operated elements such as valves in process control systems and the like. The apparatus is designed to provide for direct mechanical control of the pressure regulating apparatus in response to changes in current flow in a two wire current controller.

Abstract: The present invention relates to a weather tight cover which overlies the portion of a through-the-wall air conditioner that protrudes into a room. The cover has a peripheral sealing gasket to tightly fit against the molding or wall surfaces surrounding the opening for the air conditioner to thereby tightly seal the entire unit to provide for a draft free, insulated cover that conserves energy by substantially reducing heat losses through the interior air conditioner openings and through gaps between the outer air conditioner housing and the edges of the opening through the wall.

Abstract: Solar collector panels filled with porous fiber mats have the fibers coated with a pigmented intumescent paint which expands to partially fill the spaces between the fibers for retarding convective fluid flow through the fiber mat in the case of a fire in the structure with which the collector is associated.

Abstract: A bearing support for a flexible belt used on a tire testing machine wherein the belt forms the simulated road surface. The bearing is a hydrodynamic bearing which insures low friction between the belt and its support underneath the tire being tested.

Abstract: A paper mask produces even width borders on bordered photographic prints even if the unexposed photographic print paper is misaligned, angularly mistracking, or wandering in alignment through roll feeding, or if the width of the paper varies. The paper mask apparatus includes a base which is mounted on the paper deck of the printer and front and rear guides which are movably mounted to the base and have masking lips which overhang the longitudinal edges of the print paper. The front and rear guides are generally parallel to one another and are urged toward one another by bias springs. A separate masking frame of the desired print size is mounted to one of the two guides and moves with that guide to define transverse masking edges.

Abstract: The present invention relates to equipment used in the training of dogs. The invention comprises a jump apparatus which has a pair of channel shaped legs. Each leg is mounted on a base panel so that the leg is maintained in a generally upright manner. The channel configuration of each leg forms a slot which is suitable for selectively accepting and retaining one of a pair of support devices for a cross bar and for selectively positioning one end of a plurality of high jump panels in a generally vertical plane.

Abstract: An apparatus for feeding liquid bee food to bees includes a tank for heating and storing a bee feed liquid, a hollow, horizontally extending bee food distributor situated above the tank, a horizontally elongated, forwardly and downwardly inclined liquid guide plate situated below the distributor, openings along the bottom edge of the distributor for evenly distributing the bee feed liquid from the distributor along an elongated horizontally extending upper portion of a front face of the guide plate, a conduit for delivering heated liquid feed from the tank to the distributor, and a longitudinally extending slot in the top of the tank in position to receive surplus bee feed coming off of the bottom edge of the liquid guide plate to let the feed fall back into the tank to be recirculated.

Abstract: A hand held surface temperature sensor assembly including an elongated support adapted to have a hand grip at one end and a temperature sensing element at the other end of the support. The sensing element includes a generally flat surface that is placed contiguous with a surface of a vessel or object to be measured for temperature. The sensing element is mounted to the support through a self aligning ball and socket coupling or swivel so that precise positioning of the major portion of the elongated support relative to the surface is not necessary. The coupling will automatically swivel until the flat surface of the sensing element rests flat against the vessel surface when the sensing element is pressed against the surface under light hand pressure.