Abstract: A shotgun slug having a frusto-conical body that increases a diameter from front to rear and which further includes a plurality of vanes projecting radially from the body which extend obliquely along the length thereof. The top lands of the vanes describe a truncated cone that is axially aligned with the body and which provide an interference fit with the bore of the gun barrel. The pitch of the cone described by the vanes is steeper than that of the supporting body so that the height of the vanes decrease from front to rear. Sufficient radial depth is given to the vanes so that the vanes retain their shape after the slug has been swagged in the barrel during firing. Accordingly, a stabilizing spin is imparted to the slug as it moves through the air towards the target. The slug is further provided with a nose heavy geometry which further enhances its flight characteristics thereby improving both range and accuracy.

Abstract: An adjustable toolmaker's square that includes a one piece body having a pair of legs containing flat accurately machined reference surfaces that meet at an angle that is slightly less than 90.degree. to form a corner. One of the legs forms the base of the device and has a laterally extended groove formed therein in which a slide is movably received. The slide has a bearing surface that can be raised and lowered in regard to the base reference surface whereby the square is pivoted about the corner when it is resting upon a surface plate or the like whereby the other reference surface can be accurately positioned against a workpiece or the like.

Abstract: A control device for programing information recorded upon a receiving part by an electrochemical marking head. In the main embodiment of the invention, the number recorded by the marking head is automatically sequenced after each marking cycle is completed.

Abstract: Apparatus for selectively marking the surface of a grounded conductive part using a known electrochemical marking process. The apparatus includes a writing head having a plurality of aligned digital modules mounted therein. Each module is made up of a series of electrodes that can be independently fired to create different electrical patterns. A dielectric stencil is placed between the part and the marking head that has grid lines cut therein which overlie each of the modules and serve to shape the electrical current passing through the stencil. By selectively firing the electrodes, different alpha-numeric characters can be recorded upon the receiving surface of the part without changing the stencil.

Abstract: A drive for an agricultural machine; such as a forage wagon or heavy duty spreader apron; the drive including a drive shaft of apron chains being powered by transmissions that are fully enclosed so as to not get clogged with mud or ice and the like, the transmission being powered from a power take-off of a tractor.

Abstract: Apparatus and method for improving the definition of a signal of interest in the presence of certain types of interfering signals in chromatography. The apparatus in one embodiment of the invention includes a chromatographic column through which a sample can be passed and a first detector, a variable volume cell and a second detector connected in series with the first detector being connected to the output of the column. The apparatus also includes a device for recording the differential output of the detectors. By passing the sample sequentially through the detectors and adjusting the volume of the variable volume cell, the interfering components can be made to be present in both detectors whereby partial cancellation occurs and the signal of interest becomes more readily detectable.

Abstract: A roof system of the type wherein a rafter and a purlin are connected by a sheet metal truss. The truss contains a pair of channel-shaped mounting flanges that are hinged to the member at each end thereof. One flange is adapted to pass over and be seated upon the rafter while the opposite flange is adapted to pass over the purlin. In assembly, the flanges are brought into alignment with holes formed in the rafter and the purlin and the truss is secured in place using a spring loaded truss pin that can be easily deformed in assembly to provide a rivet-like connection between the cojoined members.

Abstract: Apparatus for providing a secure weathertight joint between a pair of coplanar building panels that includes a web passing upwardly through the seam of the joint. A pair of opposed downwardly turned runners depend obliquely from either side of the raised web and along the entire length of the joint. The adjacent ends of the two panels that form the seam are turned upwardly to pass under the runners. An elongated V-shaped spring closure is seated upon the runners with the inside surface of each closure leg being biased against the top surface of one of the runners. A locking pad is secured to the inside wall of each closure leg that snaps over the end of the adjacent runner to secure the parts in assembly.

Abstract: An automatic paper feeder for use with a character printer, the feeder having a dual cartridge capability and, alternatively, the capability of feeding envelopes to the printer. The feeder is constructed so that cut sheets or envelopes leaving the printer are delivered to a receiving station in a first in-first out arrangement. The dual cartridges are adapted to contain the cut sheets and either one or both of the cartridges can be inserted in the feeder for any given run. When both cut sheet cartridges are used the first and second sheets of a two page letter, for example, can be sequentially printed. Simultaneous use of both cartridges also permits sheets of different size and/or weight to be programmed into the feeder. In addition to cut sheets and envelopes, the feeder of the invention can be utilized for feeding continuous forms or the feeder can be deactivated to permit printing on a single "pre-empt" sheet.

Abstract: A lens case for a camera lens which can be used to protect the lens when it is either mounted upon a camera or removed therefrom. The protective case includes an elongated housing that is closed at one end by a blind wall and opened at the other to permit the case to be slipped over the lens. An end cap is provided which is capable of being slidably received over either end of the housing. When the case is used to protect a lens mounted upon a camera, the end cap is positioned over the closed end of the housing to act as a shock absorber to provide added protection to the lens. When the case is used to protect a lens that is removed from the camera, the end cap is positioned over the open end of the housing to provide a tightly sealed closure.

Abstract: Method and apparatus for monitoring the deposition of a material or materials upon a substrate using atomic absorption techniques. Radiant energy is directed through a flow of evaporant during a deposition process. The radiation contains spectral emission lines absorbable by the evaporant as well as emission lines not absorbable by the evaporant. Changes in the transmission of one or more non-absorbable lines are used to compensate for changes in the absorption of absorbable lines of interest that are caused by misalignment or displacement of the optical elements during the deposition process.

Abstract: A removable speculum for use in conjunction with an otoscope. The speculum contains a soft, rubber-like tip bonded upon the distal end thereof for protecting the ear canal and forming a seal therewith. An internal seal is also provided that acts between the speculum and a receiving surface upon the otoscope.

Abstract: A storm unit for installation in an existing window system to provide for greater insulation and weather protection. The unit includes a pair of side rails for replacing the existing inside stops of the window. The rails have a pair of parallel, vertically-extended grooves formed therein into which are buckled deformable, transparent panels whereby the panels can be raised and lowered. The top and bottom edge of each panel has a horizontally-extended cap secured thereto. When the panels are closed against the window frame, the bottom cap of the upper panel is horizontally aligned with the upper cap of the lower panel. A weathertight seal is provided that is capable of sealing the region between the adjacent faces of the two aligned caps when the panels are placed in a closed position.

Abstract: A torque converter is disclosed which comprises a gimbal assembly having a gyroscope mounted for rotation within one of the rings thereof. The spin axle of the gyroscope and the entire gimbal assembly are adapted to rotate about the precessional axis of the gyroscope. The gimbal ring is further adapted to oscillate about a torque axis that is perpendicular to the precessional axis to set up gyroscopic forces in the converter. The spin axis of the gyroscope is independently connected to the output gear of a differential drive unit and the input gear of the unit is connected to the drive shaft of the engine. A planetary gear section is interposed between the input and output gears of the drive unit that is adapted to turn the loaded output shaft of the converter. Oscillating means rock the gimbal ring about the torque axis at some fixed multiple of the engine speed while the entire gimbal assembly is turned about the precessional axis at some fixed multiple of the load speed.

Abstract: A color endoscope having a component viewing head that is easily inserted into a relatively small opening or cavity and an electrical section that is capable of producing a readout signal containing full color image information that is compatible with standard format television for storing, displaying or otherwise processing the color information.

Abstract: A color endoscope having a compact viewing head that is easily inserted into a relatively small opening or cavity and an electrical section that is capable of producing a readout signal containing full color image information that is compatible with standard format television for storing, displaying or otherwise processing the color information.