Abstract: A system for minimizing damage to an object located rearward of a chair from rearward movement of a backrest portion of the chair by a powered movement apparatus, and the backrest portion may be movable rearwardly from a substantially upright position to a reclined position. The system may comprise an apparatus positionable on the backrest portion of the chair and configured to be triggered when the apparatus contacts an object positioned rearward of the backrest portion. The apparatus may be configured to be interfaced with the movement apparatus of the chair to interrupt rearward movement of the backrest portion when the apparatus is triggered.

Abstract: A spring mounting cradle for an over-pressure valve assembly has integral valve-element camming surfaces provided adjacent the lower ends of a pair of the bent legs forming the cradle.

Abstract: A spring mounting cradle for an over-pressure valve assembly has integral valve-element camming surfaces provided adjacent the lower ends of a pair of the bent legs forming the cradle.

Abstract: The present invention relates to anti-viral uses of leflunomide product, alone or in combination with other anti-viral agents, or in combination with a pyrimidine such as uridine.

Abstract: This invention relates to a surface mount outlet box for use in electrical, electronic, security and various telecommunications installations which stores and ships flat to save space and interfaces with a wide variety of face plates and raceways.

Abstract: The present invention relates to anti-viral uses of leflunomide product, alone or in combination with other anti-viral agents, or in combination with a pyrimidine such as uridine.

Abstract: A fail-safe fluid actuator comprising a piston slidably disposed within a cylinder. In the event of a pressure loss, the piston is urged to a fail-safe position by a plurality of externally mounted constant force spring mechanisms. In one embodiment the mechanisms are located at one end of the cylinder with a telescoping cover for protecting them from exposure and damage. In another embodiment the mechanisms are located at the side of the cylinder whereby the overall length of the actuator is significantly shortened. The fail-safe force applied to the piston by the spring mechanisms is externally adjustable, and they are readily accessible fur replacement or repair.

Abstract: A pressure relief valve for releasing fluid through a vent in a railway tank car, tank trucks and similar vessels. A valve disk is normally biased in a closed position by a plurality of constant-force springs of laminated steel tapes on drums supported on upright angle brackets symmetrically arranged around a valve seat. The pressure at which the valve opens is determined by a preselection of the number of springs, laminated tapes per spring, and the restoring force of each tape.

Abstract: A simple and effective "RF snubber" circuit resolves the problems associated with transient spectral noise caused by radio transmitter activation in nearby channels. By connecting an RF snubber circuit in parallel with the RF amplifier output, the rise time or turn-on characteristic of the RF signal generated by the transmitter is controlled. As a result, adjacent channel interference is substantially eliminated.

Abstract: A simple and effective "RF snubber" circuit resolves the problems associated with transient spectral noise caused by radio transmitter activation in nearby channels. By connecting an RF snubber circuit in parallel with the RF amplifier output, the rise time or turn-on characteristic of the RF signal generated by the transmitter is controlled. As a result, adjacent channel interference is substantially eliminated.

Abstract: A clip for securing pegboard toolholders in place on a pegboard comprises a length of spring wire preformed at one end into a helical coil having a plurality of wire turns and a diameter slightly larger than that of a toolholder to permit sliding passage of the clip thereover. The spring wire is preformed into a hook at its other end, and the spring wire intermediate the coil and hook is preformed into a substantially arcuate spring portion having a length slightly less than the pegboard hole spacing. The placement of the clip coil on a toolholder in engagement with the toolholder element extending into a pegboard hole permits by means of the resilient extension of the spring portion, the latching of the clip hook into a pegboard hole below the hole into which the toolholder element is inserted. The clip hook resiliently engages the rear surface of the pegboard to lock the toolholder onto the pegboard by exerting a resilient downward force on the toolholder.

Abstract: Mounting and retaining apparatus for electrical, optical, or fluid conductors has a pair of resilient top members cantilevered from relatively rigid vertical sidewalls which are attached to a relatively rigid horizontal base member. The apparatus defines a rectangular channel in which the conductors are housed. The apparatus is adapted to allow conductors to be easily inserted into or removed from the channel via a one-hand operation. Insertion is accomplished by placing a conductor over the top members and pushing down on them so as to cause an opening between the top members which is sufficient to allow the conductors to enter the channel. The resilient top members may overlap to hide the conductors retained in the channel or they may be spaced apart.

Abstract: A combination seal and check valve to be mounted in a filler pipe of a fuel tank to minimize the escape of vapor from the tank when its cap is removed, typically during refueling, comprises an annular body of elastomeric material which includes an internal annular lip for sealing around the outer surface of a fuel nozzle, and an integral check valve portion at the axially inner end thereof. This check valve portion includes at least three gusset members which are of such configuration and proportions that when a fuel nozzle is inserted through the unit, the gusset members are deflected radially outwardly to open a passage through the check valve without being stretched or otherwise distorted by passage of the fuel nozzle therepast.

Abstract: An arrangement for providing access to the seal rings of a seatless high pressure valve includes an aperture in the valve body and a demountable sealed closure for the aperture. The sleeve within the valve body for transmitting the gland force to the seal rings is made in segments small enough for removal through the aperture to permit access to the seal rings. The valve seal rings may accordingly be replaced without disassembly of the major valve components including the valve plunger and gland.

Abstract: A circuit for safely and rapidly charging batteries, with the charging occurring at three different rates. A first rate is used to bring a battery up to a level where it is determined to be safe for rapid rate charging. At this charge level the temperature of the battery may also be checked to be sure it is within a safe range for rapid charging. If safe, the battery is then rapidly charged at a second rate, until it is almost at its maximum capacity. At that point a third rate charge, lower than the first charge rate, is used to maintain the battery at nominally full charge. A microprocessor controller controls a plurality of rapid rate chargers and determines when the battery parameters are safe so that rapid charging can be safely employed. The rapid charger may be of a conventional charge pump type.

Abstract: Communication between a first radio transmitter and receiver and a second radio transmitter and receiver is provided by a system repeater. An arrangement for each radio transmitter and receiver in the system establishes communication on a radio frequency channel selected from a plurality of such channels. When an arrangement is in an idle or receive mode, it causes the associated receiver to search the channels for a predetermined group tone or tones assigned to each receiver. When the predetermined group tone or tones are received on a channel, the arrangement enables the associated transmitter and receiver on that channel. When an arrangement is in a call originate or transmit mode, it causes the associated receiver to search for an idle or unused channel.

Abstract: Arrangement for establishing communication between a first mobile radio station and a second mobile radio station through a repeater over a radio frequency channel selected from a plurality of such channels. In an idle mode, a mobile station searches the channels for a predetermined group signal identifying it as belonging to a particular group of mobile stations. When that predetermined group signal is received on a channel, the mobile station is enabled on that channel so that it can communicate with a call originating mobile station belonging to the same group. In a call originate mode, a mobile station searches for an idle or unused channel identified by the absence of a busy signal. When an idle channel is found, the call originating station transmits a busy signal. The repeater, hearing the busy signal, transmits an acquisition signal.

Abstract: An arrangement for the cellular operation of a repeater trunking system. In a repeater trunking system including a plurality of mobile stations communicating over a predetermined number of communication channels, each associated with a repeater, an arrangement for inhibiting attempted communication on channels not in a selected cell even though the mobile stations are capable of operation on the channels of non-selected cells.

Abstract: A line blind includes seal rings on either side of a spectacle plate interposed in a pipe, and a special camming arrangement including two cooperating sets of longitudinally directed sloping teeth circularly arranged which operate on slight rotational movement of one, while the other is held stationary, to force engagement under pressure between the seal rings and the plate.

Abstract: A method and an apparatus for photometrically analyzing a stream under test containing both chlorine and chlorine dioxide is characterized by heating a portion of the stream to decompose any chlorine dioxide therein into elemental chlorine. This heated portion of the stream is photometrically analyzed to determine the concentration of chlorine produced by the decomposition of chlorine dioxide, taking into account the concomitant dilution produced thereby.