Abstract: A method of hiding copyright related messages within digital data works is taught. The method relies on modifying data elements in the work according to certain rules which depend on the actual message itself. The information content of the message can be extracted through a comparison of measurable characteristics of defined portions of the modified work.

Abstract: In order to locate an electrically conductive object, the electromagnetic field generated by a current in the object is detected by a detector having a plurality of spaced apart antennas. In order for the location of the object to be determined, two or more of the antennas together have at least four aerials, with first and second aerials measuring field components in a direction perpendicular to the direction of separation of the antennas, the third aerial measuring field components parallel to the direction of separation and the fourth aerial measuring field components in a direction mutually perpendicular to the field components measured by the first, second and third aerials.

Abstract: An electromagnetic drive is described that exhibits two electromagnets (2, 3) situated opposite one another and an armature (10) between them that can be moved back and forth. The armature (10) is held in an intermediate position by elastic forces and brought into a terminal position by the power of the electromagnets (2, 3). The armature (10) is mounted using a torsion spring (6) and at least one drive together with its bearings forms a single structural unit.

Abstract: A magazine and compact feed mechanism for firearms includes an end cap on the magazine to keep cartridges from falling out and a stop mechanism for preventing a rotating cartridge transfer disk from traveling beyond 90°. The magazine is placed in a horizontal position so that it is parallel to the barrel and includes an end cap that is shaped to prevent cartridges from inadvertently falling out of the magazine. A spring-loaded cover may also be added to the magazine for further protection. Cartridges from the magazine are delivered to a rotatable transfer disk by an injector arm driven by the recoil of the slide mechanism. A rotatable cartridge transfer disk is also driven by the recoil of the slide mechanism and functions to receive the cartridge from the horizontal magazine and rotate it 90° so as to present it properly to the breech mechanism so that it can be presented to the barrel.

Abstract: A stereoscopic, long-distance microscope is capable of stereoscopically viewing targets within the range of 100 mm to 300 mm from the front lens element. The system preferably comprises: a front lens element having a diameter Dfl for receiving light rays from the target; a rear mirror having a diameter Drm for receiving light rays from the front lens element; a secondary mirror located on the rear surface R2 of the front lens element for receiving light reflected from the rear mirror element; and, an angled mirror located between the secondary mirror and the stereoscopic eyepiece in its turn receiving light rays reflected from said angled mirror and presenting them to both eyes of the viewer. The diameter Dfl of the front lens element is preferably significantly smaller than the diameter Drm of the rear mirror element.

Abstract: A sterilizable instrument supporting bracket that may be attached to a sterilization tray having spaced perforations. The apparatus includes a resilient body used to support medical instruments. A skeleton structure is located within the resilient body for providing support to the resilient body and includes resilient metal locking devices for attaching the bracket to the tray. The locking devices include two locking numbers having resilient shaft portions that are biased to given position. A head is located to each of the shaft portions with two of the head portions facing in opposite directions. Resilient ribs are attached to the resilient body and are compressed against the tray when the resilient body and related skeleton structure are attached to the tray. The bracket is attached to the tray by squeezing the head portions toward each other and passing them into perforations of the tray and then allowing them to resiliently move outwardly on the shafts to lock the bracket onto the tray.

Abstract: A method and apparatus provides infusing marinating liquids into foods in a relatively short period of time to enhance the flavor of said foods. The method uses air pressure above atmospheric to force marinating liquid into the foods. The foods are submerged in the marinade and the air pressure forces the marinade into the submerged foods. Air pressure and time of pressurization is electronically controlled and can be based upon the weight of the food to be marinated. The apparatus includes a sealed vessel for holding the food and marinate and electronic controls that set and manage a pump to control the pressure and duration of pressurization to insure adequate penetration of the marinating liquid into the food.

Abstract: The present invention shows an improved brooder for use in providing heating in brooder operations by infrared radiation, such as in swine and poultry breeding. The brooder has an integral electrical plug, cord and bulb socket, holding an infrared bulb. A frame member has two interlocking semi-circular components surrounding the cord proximate the socket, with the frame member extending radially outward from the socket a distance approximately equal to the width of the infrared bulb. A protective shade is attached to the outer rim of the frame member, and extends downward at least approximately the length of the infrared bulb.

Abstract: A method of detecting faults on a cable (1) is provided, such a cable (1) having a conductive path, there being a number of sensors (5a, 5b, 5c, 5d, 5e) along the length of the cable (1), each of the sensors shaving a resistance measurement device for detecting the cable to ground resistance of the respective section of the cable (1). The cable to ground resistance at the respective sections are measured and compared with a predetermined value, and if the cable to ground resistance of any one particular section is less than the predetermined value, it is determined that a fault is present in that section.

Abstract: A UV disinfecting device for flowing fluids, having a frame (1) and a certain number of lamp units (3) with UV lamps, whereby the lamp units each have at least one electrical connection and are held by the frame (1) substantially parallel and spaced from each other. For securing the lamp units (3), clamps (10, 14) are provided, which are particularly favorable for fluid flow. Preferably, each lamp is encased in a respective casing tube (6) having one or more elastomeric end stoppers (7) and the clamps are metallic leaf springs which engage the stoppers. The electrical leads pass through the stoppers. This facilitates easy replacement of failing lamps.

Abstract: The disclosure relates to an instrument count stand for supporting scissors or scissor-like instruments having a pair of blades and a pair of handles. The stand includes a base having a plurality of slots for receiving portions of the instruments. A pair of side walls extending from the base support a roller. A handle is attached to the roller for moving the roller from a first position disengaged from the handles of the instruments to a second position which contacts the handles of the instruments and spreads the handles and accordingly the blade-like members of the instruments.

Abstract: An improved brooder lamp fixture for use in providing heating in brooder operations by infrared radiation, such as in swine and poultry breeding. The brooder lamp fixture has an integral electrical plug, cord and bulb socket, which holds an infrared bulb. A frame member has two interlocking semi-circular components surrounding the electrical cord proximate to the socket. The frame member extends radially outward from said cord a distance approximately equal to the width of the infrared bulb, and has a circular outer rim. A protective shade/enclosure is attached to the outer rim of the frame member and extends downward at least about nine inches to about fifteen inches from the frame member.

Abstract: A planar emitter equipped with planar resonators that is simple, small in construction and consists of few, easily manufactural components, while at the same time having high frequency dependent system quality with the widest possible spectral range, has a plurality of sandwich-like layers (4, 5, 6, 7, 8) that are planned parallel to each other with the layer (5) being made of two different dielectric materials (14) and (15). The thickness (L1) of layer (14) is greater than the thickness (L2) of layer (15) with layer (4) having a plurality of spaced, thin layer, electrically conductive planar resonators (4) in contact with one side of layer (15). One side of layer (14) is in contact with an electrically conductive thin layer (6) that defines a common earthing member that has its opposite side in contact with layer (17) made of a dielectric material. A coupling network (3) is included in layer (8) and comprises microstrip circuits (3a-3f) in contact with layer (7).

Abstract: The invention relates to an expandable insert for use as a vessel support in blood vessels, the insert being able to deform plastically from a nonexpanded state to an expanded state by application of a radial force directed from the inside outward, with at least one tubular, essentially cylindrical main body section, whose circumferential surface is formed by a number of annularly meandering rings, the rings in each case forming a one-piece strand of material with a defined strand length. The insert is particularly stiff with respect to externally acting radial forces because a first group of rings is provided whose strand length essentially corresponds to the circumference of the insert in the expanded state, and a second group of rings is provided whose strand length is greater than the circumference of the insert in the expanded state.

Abstract: A self-inflatable mattress is formed from an open pore foam core and one or more layers of dual melt film. Initially, a layer of dual melt film is placed on top of the open pore foam block such that the side with the lower melting temperature contacts the foam core. A non-stick, heat transferable buffer layer is then placed on top of the film and heat and pressure are applied, preferably through a roller, causing the bottom surface of the film to stick to the top surface of the foam core. The edges of the top sheet are also adhesably attached to the sides of the core using a pair of heated side pressure rollers. Lastly, the cushion is inverted and a second, or bottom, sheet of dual melt film is placed on top of the foam core and attached to the bottom surface and the sides in a similar manner. Finally, a valve, which may be either oral, or one way, is attached to the side of the mattress.

Abstract: Stable electron acceptor compositions are composed of a plurality of pillared metal complexes disposed on a supporting substrate. At least one Group VIII metal at zero valence is entrapped within this matrix. The complexes comprise from one to about 100 units of the formula: —(Y1O3—Z—Y2O3)MeY— Y1 and Y2 being phosphorus or arsenic; Z being a divalent group which reversibly forms a stable reduced form and contains two conjugated cationic centers having a negative E°red value; and MeY being a divalent, trivalent, or tetravalent metal of Group III, IVA, or IVB having an atomic number of at least 21 or a lanthanide with bonded anions. The units are bound to the substrate through an organic polymer having side chains derivatized with phosphonate or arsonate groups. Counter anions balance the charge of Z. The compositions can be used in the decomposition of water to yield hydrogen gas, the sensing of oxygen, and as catalysts.