Abstract: An electromagnetic projectile launcher has a barrel (10) formed with parallel firing rails (13, 14) and separate supply conductors (18, 19) which are connected to the firing rails to supply firing current to one and receive the firing current from the other. The supply conductors (18, 19) are formed about the bore (11) of the barrel as sectors of a cylinder and are coaxial with one another such that current in adjacent portions of the two supply conductors flow in opposite directions. Very little time varying magnetic field is produced within the bore of the barrel (11) or outside of the supply conductors (18, 19) as a result of firing currents flowing in the supply conductors and in the firing rails. The magnetic field which accelerates a projectile through the bore is provided from a persistent magnet (26), which may be superconducting, formed about the bore in a dipole configuration to provide a constant magnetic field substantially transverse to the path of the projectile through the barrel.

Abstract: A collapsible file box is disclosed which includes a rectangular base, a pair of generally rectangular ends adapted to extend vertically upwardly from the rectangular base, each end further including a plurality of side tabs extending outwardly from each of the two side edges of the end, a pair of generally rectangular sides adapted to extend vertically upwardly from the rectangular base, each side having a plurality of grooves at each of the two side extremities of the side to receive the tabs on the ends so that the tabs may be inserted into the grooves to assemble the collapsible file box only with the sides and ends in correct orientation to each other. The collapsible file box may also include a rectangular lid which is substantially structurally identical to the rectangular base, and may also include upwardly facing side rails on the sides for suspending conventional letter size hanging file folders, and upwardly facing end rails on the ends for suspending conventional legal size hanging file folders.

Abstract: A public terminal receptacle for containing, protecting, and allowing a user access to a computer terminal, telecommunications device for the deaf, or another type of terminal which is telephonically linked and physically adjacent to a public telephone through which the terminal may telecommunicate with other electronic devices. The public terminal receptacle includes a housing having an opening and which is adapted to be attached to a public telephone booth, a drawer which is slidably mounted within the housing to move between a closed position where the drawer is within the housing and an open position where at least a forward portion of the drawer extends out through the opening, the terminal, and a motor drive system mounted within the housing and which is drivingly connected to the drawer for opening and closing the drawer in response to specific electrical signals.

Abstract: A system and method for the construction of one-dimensional maps from fragmentation data is disclosed. Particularly useful for construction of restriction maps of DNA, the system and method completely permutes sites, single digest fragments, and any available multiple digest fragments, and displays maps in rank-order according to a quality factor. Display of constructed maps includes information about relative ordering of all fragments, sites, and particularly about closely-spaced sites and fragments.

Abstract: A sample changer for powder X-ray diffractometry includes a cylindrical dispensing container for holding a stack of pre-test sample holders, a cylindrical receiving container for holding a stack of post-test sample holders and a changer arm which automatically picks up the topmost sample disk in the dispensing container and rotatably positions the sample disk on the sample holder stage of an X-ray diffractometer for analysis. After analysis, the changer arm removes the sample holder and releases it into the receving container. The sample holders have a circumferential groove which coacts with semi-circular rotatable cams positioned on the distal end of the changer arm to enable the changer arm to lift and place the sample holders.

Abstract: In vitro production of RNA copies of either strand of any cloned DNA sequence may be obtained utilizing a unique cloning vector having two different opposed promoter sequences which are separated by a multiple cloning site. RNA polymerases which recognize only one of the particular promoter sequences in the vector may be applied to obtain transcription which proceeds from the recognized promoter toward the other promoter. Transcription of a desired strand of any DNA sequence is obtained by cleaving a particular restriction site in the multiple cloning site between the two promoter sequences, cloning the desired DNA sequence into the cleaved site, then cleaving another site between the two promoters which is distal to the promoter from which transcription is desired. The RNA polymerase which recognizes the selected promoter may then be applied to the vector to obtain transcription of the selected DNA sequence in vitro.

Abstract: An apparatus and a method of use for removing specified dialyzable components from a complex reference fluid such as, for example, blood. The invention includes a semi-permeable tubular dialysis membrane, which is inserted into the reference fluid. An equilibration fluid is injected into the tubular membrane and allowed to equilibrate with the outside reference fluid. The equilibrated fluid is then removed for analysis.

Abstract: Ion implantation into surfaces of three-dimensional targets is achieved by forming an ionized plasma about the target within an enclosing chamber and applying a pulse of high voltage between the target and the conductive walls of the chamber. Ions from the plasma are driven into the target object surfaces from all sides simultaneously without the need for manipulation of the target object. Repetitive pulses of high voltage, typically 20 kilovolts or higher, causes the ions to be driven deeply into the target. The plasma may be formed of a neutral gas introduced into the evacuated chamber and ionized therein with ionizing radiation so that a constant source of plasma is provided which surrounds the target object during the implantation process. Significant increases in the surface hardness and wear characteristics of various materials are obtained with ion implantation in this manner.

Abstract: An apparatus and a method of use for removing specified dialyzable components from a complex reference fluid such as, for example, blood. The invention includes a semi-permeable tubular dialysis membrane, which is inserted into the reference fluid. An equilibration fluid is injected into the tubular membrane and allowed to equilibrate with the outside reference fluid. The equilibrated fluid is then removed for analysis.

Abstract: An auxiliary mounting device for use with a tractor having a one-point tractor hitch. The auxiliary mounting device includes a body having a forward end and a rearward end with the longitudinal axis of the body extending therebetween. Means are provided for attaching the body to the tractor hitch. The auxiliary mounting device includes a primary tool mount on which a primary cultivating tool may be mounted in fixed relation to the body. A secondary tool mount is located rearwardly of the primary tool mount. A secondary cultivating tool may be mounting thereon. Wheels are attached to the body in rotating relation and are located at a selected point between the primary and secondary tool mounts. Means are provided for moving the wheels between a first position, wherein the wheels support and elevate the body and the primary and secondary cultivating tools are held above the ground, and a second position, wherein the body is lowered and the primary and secondary cultivating tools are engaged with the ground.

Abstract: A resistance welding apparatus (10) is disclosed which is particularly adapted for use in welding parts (27) into the interior surface of a metal tube (17) in a pre-determined pattern obtained by longitudinal and rotational indexing of the tube. An elongated electrode arm (20) extends into the tube and has a feed track (35) attached thereto through which the metal pieces (27) to be welded are moved down the length of the electrode arm (20). The other end of the electrode arm (20) is rigidly connected to a mount (21) and is electrically insulated therefrom. At the end of the feed track (35), a lever (61) aligns the lead metal piece so as to be at the same level as an end support (43), and a pusher lug (41) advances the metal piece to the end support (43). A piston (46) carried by the end support and acting against the inside wall of the tube moves the end support (43) transversely of the electrical arm to bring the piece (27) to be welded into pressure contact with the inside of the tube (17).

Abstract: An ion cyclotron resonance cell has applied thereto an excitation which has a time domain waveform which is the inverse Fourier transform of a frequency domain excitation spectrum which has been chosen by the user to yield selective excitation and/or suppression of ranges of ion mass-to-charge ratios. To minimize the dynamic range of the time domain signal resulting from the inverse Fourier transform, the phases of the various discrete frequency components in the frequency domain spectrum which are used in calculating the inverse Fourier transform are not constant but rather are varied as a function of the frequency of the components. The phase of each component is assigned such that the frequency components in the time domain signal are not all in phase at any point in time, thereby avoiding large magnitude spikes in the time domain waveform. The phases of the various frequency components may follow a non-linear function of the frequencies of the components, such as a quadratic function.

Abstract: A cured animal foot for mounting to a plaque includes an animal foot comprised of skin, bone, and flesh, having a lower portion with digits and an upper portion which at an upper end thereof has been cut from a leg of an animal, the upper and lower portions being joined at about a 90.degree. angle at the wrist joint. The cured animal foot further includes a semi-stiff wire inserted longitudinally into the animal foot and extending into both the upper and lower portions of the animal foot. While the animal foot is still fresh, it is bent at the wrist to the desired angle and held thereat by the bent wire while the foot is cured in the bent configuration in a curing bath. The invention is carried out by providing a fresh animal foot and a semi-stiff wire, inserting the semi-stiff wire longitudinally into the foot so that the wire extends into both the upper and lower portions of the foot. The foot is then bent at the wrist to the selected angle.

Abstract: A vial cap coupling device for flexibly coupling together a vial and its sealing cap includes a cylindrical retainer having an inner surface which forms a cavity for snugly receiving the sealing cap and firmly engaging an outer surface of the cap, a slide ring which has an inner diameter which is about the same as the outside diameter of the cylindrical portion of the vial so that the slide ring can be slid up the cylindrical portion of the vial to the rim at the upper end of the cylindrical portion, and a hinge which at its ends is integrally connected to the retainer and slide ring. The vial cap coupling device retainer further includes a small resilient flange which has an upward shelf which retains within the cavity a sealing cap by abutting against a bottom of the cap.

Abstract: A mold and molding method for forming a taxidermy animal head mannikin with artificial eyepieces molded therein in proper position includes a pair of mold cavity half parts each of the half parts having a cavity surface contoured for correct anatomical formation of the features of half of the mannikin, an eye socket recess in the cavity surface shaped for snugly receiving the front portion of the artificial eyepiece and leaving the rear portion projecting into the mold cavity, and a small keyway selectively located in the eye socket recess to receive a matcing key which is affixed to the front portion of the artificial eyepiece and is positioned thereon so that placement of the key in the keyway locates the eyepiece in proper anatomical position prior to the introduction on liquid foamable hardening material into the cavity between the mold half parts.