Abstract: An automatic switching mechanism for a model plane starter motor having a clutch bushing for gripping the propeller spinner of the plane includes a base member, a movable member movably mounted to the base member, means for mounting a starter motor to the movable member; means for biasing the movable member to a first position; and switch means for closing the electrical power circuit through the starter motor as the movable member approaches a second position responsive to the engagement of the airplane propeller spinner with the starter motor clutch bushing.

Abstract: A one way air admittance valve (2) for admitting air into a pipe (3), which valve (2) comprises a body portion (4) for fitting to the pipe (3), at least one air inlet port (6) in the body portion (4), and rigid sealing means (16) which is longitudinally movable between a first position in which it seals the air inlet port (6) and a second position in which the air inlet port (6) is open for the admittance of air into the pipe (3), the valve (2) being such that there is only one sealing means (16) for all of the air inlet ports (6), and the sealing means (16) being such that it seals at two separate areas by engaging with a pair of lip seals (18,20) which are mounted on the body portion (4) and which are radially spaced apart by being positioned inwardly and outwardly of of the air inlet port (6).

Abstract: A composition for isolating and purifying nucleic acid from cell culture medium and a method for isolating and purifying nucleic acid from cell culture medium employing the composition, in which the reagent includes about 1 to 3.5M acetate salt solution, about 4 to 11.2M acetic acid, about 1 to 40% by volume phenol, and about 1 to 40% by volume chloroform.

Abstract: A stampable addressable self adhesive label comprising a first portion for receiving postage payment, a second portion for receiving an address and a backing sheet to which the first and the second portions are stuck, the first and the second portions having a pressure sensitive adhesive for enabling the first and the second portions to be peeled off the backing sheet and stuck on an item of mail, the first and the second portions being of a size that is permitted by regulations governing the sending of mail through the post, and the first and the second portions being such that they are able to be peeled off the backing sheet separately from one another whereby the first portion can be stuck on the item of mail in a postage payment position and the second portion can be stuck on the item of mail in an address position.

Abstract: A positive displacement shuttle pump having a cylinder with axially displaced and mutually isolated inlet and outlet portions; a shuttle piston having a reservoir for accepting pressurized feed from the inlet port in the feed cycle and for dispensing feed to the outlet port in the dispensing cycle; a displacement piston extending longitudinally in the shuttle piston and communicating with the reservoir; an actuator for extending the displacement piston into the reservoir to pressurize the feed and urge the feed through the outlet port during the dispensing cycle; the displacement piston is responsive to the pressurized feed in the reservoir for retracting during the feed cycle; the displacement piston driving the shuttle piston through the feed and dispensing cycles.

Abstract: A cell processor and memory-managed computer system using the same includes a processor module for interacting with a memory module. Within the memory module a plurality of groups of information are stored. Each group includes a data sector for storing a word, a vector sector for storing a vector word that links that group with at least one other group, and a function sector. The function sector includes an operation field for storing an operation word that indicates the operation to be performed by the processor module on the data word and a state field for storing a state word that represents the condition of that group for processing. When enabled by the memory module, the processor module processes a group of information designated by the memory module as ready for processing. It also selectively processes at least one of the words of the designated group.

Abstract: A voltage to current conversion switching system includes an input terminal for receiving input signal voltage to be converted to a current; an output terminal; a first, positive channel having a first offset amplifier for introducing a positive offset to the input signal; a first voltage to current amplifier responsive to the first offset amplifier; and first switching means responsive to the first voltage to current amplifier to provide a first offset current signal to the output terminal; a second, negative channel has a second offset amplifier for introducing a negative offset to the input signal; a second voltage to current amplifier responsive to the second offset amplifier; and second switching means responsive to the second voltage to current amplifier to provide a second equal and opposite offset current signal to the output terminal to compensate for the temperature drift and switching current injection in the first and second offset current signals; and drive means for actuating the first and secon

Abstract: A task light including an aperture fluorescent lamp, a housing surrounding the lamp and having an opening aligned with the lamp aperture, and a reflector on one side of the housing opening for redirecting light back to the plane of illumination of the lamp to create a longer, more uniform illumination field for evenly illuminating a subject and acting as a direct-glare preventing visor.

Abstract: A method and apparatus for producing water-soluble resin and a resin product made by that method, the method including the steps of supplying a volume of an acidic pyrolysis oil, raising the pH of the oil above 7.0 to partially polymerize the oil, and heating the partially polymerized oil to encourage further polymerization to form the resin product.

Abstract: Door reinforcing apparatus (2) comprising a lock guard (4) for fitting to an outer face (10) of a door (12) adjacent a lock (14) in the door (12), and fixing studs (18) for fixing the lock guard (4) in position, the lock guard (4) being larger than the lock (14), the lock guard (4) having a side wall (20) which extends over the outer face (10) of the door (12) and an end wall (22) which abuts the edge (24) of the door (12) during use of the door reinforcing apparatus (2), the side wall (20) having a key aperture (26) for receiving a key for the lock (14), the end wall (22) having a lock aperture (30) for receiving at least a bolt part of the lock (14) so that the bolt part of the lock (14) can pass backwards and forwards through the lock aperture (30 ) during operation of the lock (14), and the fixing studs (18) comprising studs (40) which extend from an inner face (42) of the side wall (20) of the lock guard (4) parallel to but spaced apart from the end wall (22), and screw members (44) which pass through ap

Abstract: The adjustable powder measure is designed to effect the reloading of firearm cartridge cases. It comprises a main body in the form of a transparent powder container 6 with a transparent center tube 7 able to slide inside the container and powder contents. Measuring and dispensing is viewed through the transparent components. The friction fit plug 8 is adjusted to obtain the desired volume by insertion of a graduated rod 10 into the bore of the center tube. A reprimed cartridge case 1 is attached to the transparent pliable end tube 2, the powder measure being held vertically with the cartridge case at the top. The center tube is drawn below powder level, filling the measuring cavity above the friction fit plug. The center tube is then pushed through a sealing washer 4. Inverting the powder measure allows only the cavity contents to drop into the cartridge case.

Abstract: A digital signal filter circuit for convolving a sequence of at least n+(q+1) data samples with a kernel of n coefficients, where the coefficients have as an envelope a polynomial function of degree q, which extracts a first set of q+1 contiguous data samples, stores n-(q+1) intermediate data samples following the set of (q+1) contiguous data samples, extracts from the sequence of data samples a second set of (q+1) contiguous data samples that follow the intermediate data samples, linearly combines the data samples of the first and second sets with weighting values that are a function of the coefficients of the polynomials to obtain a linear combination of (q+2) sequential convolved samples with binomial coefficients, and recursively selects at least one of the convolved sample from the linear combination of (q+2) sequential convolved samples.

Abstract: A playpen canopy for a playpen having elongated supporting members. The canopy includes a framework having elongated rods which extend generally alongside of the supporting members of the playpen, horizontal rods which are connected to the elongated rods, a sheet of flexible material which is attached to the horizontal rods for forming a roof for the playpen canopy and a plurality of connecting elements for releasably connecting the elongated rods of the canopy to the elongated supporting members of the playpen.

Abstract: A wavelength-locked laser gaseous species monitor including a variable wavelength laser with a laser output actively stabilized to a wavelength at or near an absorption wavelength of the species being monitored. The laser is modulated about that wavelength to establish a modulated output with a known frequency and bandwidth. The modulated output is passed through the sample being monitored and then collected. An even harmonic of the collected output with respect to the modulation frequency is determined, and the presence in the sample of the species being monitored is detected from the even harmonic signal.