Abstract: A raised garden bed is provided including wood plank sides that are secured at their joints with corner brackets forming corners. The brackets have two panels joined along one edge with a U-shaped channel at the base of each panel to receive a wood plank. Louvers extend into the channels to hold the planks with a press fit and allow the bed to be assembled and used without screws.

Abstract: A raised garden bed is provided including wood plank sides that are secured at their joints with corner brackets forming corners. The brackets have two panels joined along one edge with a U-shaped channel at the base of each panel to receive a wood plank. Louvers extend into the channels to hold the planks with a press fit and allow the bed to be assembled and used without screws.

Abstract: A bird feeder wherein a housing includes a plurality of modular hopper elements with a floor underlying and supporting the hopper elements and a roof overlying the hopper elements, the hopper elements including impermeable side walls juxtaposed to form a hopper assembly of maximum capacity and minimum footprint and a front wall with feed apertures to enable birds to access bird food within the hopper element. Each hopper may be selectively removed and replaced without disturbing the other elements. In one embodiment, the hopper elements form segments of an inverted frustoconical hopper assembly which may be selectively and individually removed from the bird feeder without disassembling the housing.

Abstract: A bird feeder wherein a housing includes a plurality of modular hopper elements with a floor underlying and supporting the hopper elements and a roof overlying the hopper elements, the hopper elements including impermeable side walls juxtaposed to form a hopper assembly of maximum capacity and minimum footprint and a front wall with feed apertures to enable birds to access bird food within the hopper element. Each hopper may be selectively removed and replaced without disturbing the other elements. In one embodiment, the hopper elements form segments of an inverted frustoconical hopper assembly which may be selectively and individually removed from the bird feeder without disassembling the housing.

Abstract: An electric or electronic animal trap wherein the housing includes a pair of spaced electrodes or charge plates in a killing chamber intermediate the trap entrance and a source of bait. Interposed in the pathway to the electrodes is at least one diverter which discourages a target animal from reversing direction before it is electrocuted. In one embodiment, juxtaposed to the entrance are at least two diverter members angularly offset relative to each other to define a maze-like path to lead a target animal to the charge plates for electrocution while discouraging reversal of direction and protecting against direct access to the charge plates through the entrance opening by children, pets or non-target species.

Abstract: An electric or electronic animal trap wherein the housing includes a pair of spaced electrodes or charge plates in a killing chamber intermediate the trap entrance and a source of bait. Interposed in the pathway to the electrodes is at least one diverter which discourages a target animal from reversing direction before it is electrocuted. In one embodiment, juxtaposed to the entrance are at least two diverter members angularly offset relative to each other to define a maze-like path to lead a target animal to the charge plates for electrocution while discouraging reversal of direction and protecting against direct access to the charge plates through the entrance opening by children, pets or non-target species.

Abstract: An electric or electronic animal trap wherein the housing includes a pair of spaced electrodes or charge plates in a killing chamber intermediate the trap entrance and a source of bait. Interposed in the pathway to the electrodes is at least one diverter which discourages a target animal from reversing direction before it is electrocuted. In one embodiment, juxtaposed to the entrance are at least two diverter members angularly offset relative to each other to define a maze-like path to lead a target animal to the charge plates for electrocution while discouraging reversal of direction and protecting against direct access to the charge plates through the entrance opening by children, pets or non-target species.

Abstract: An electric or electronic animal trap wherein the housing includes a pair of spaced electrodes or charge plates in a killing chamber intermediate the trap entrance and a source of bait. Interposed in the pathway to the electrodes is at least one diverter which discourages a target animal from reversing direction before it is electrocuted. In one embodiment, juxtaposed to the entrance are at least two diverter members angularly offset relative to each other to define a maze-like path to lead a target animal to the charge plates for electrocution while discouraging reversal of direction and protecting against direct access to the charge plates through the entrance opening by children, pets or non-target species.

Abstract: An electric or electronic animal trap wherein the housing includes a pair of spaced electrodes or charge plates in a killing chamber intermediate the trap entrance and a source of bait. Interposed in the pathway to the electrodes is at least one diverter which discourages a target animal from reversing direction before it is electrocuted. In one embodiment, juxtaposed to the entrance are at least two diverter members angularly offset relative to each other to define a maze-like path to lead a target animal to the charge plates for electrocution while discouraging reversal of direction and protecting against direct access to the charge plates through the entrance opening by children, pets or non-target species.

Abstract: A bird feeder wherein a housing includes a plurality of modular hopper elements with a floor underlying and supporting the hopper elements and a roof overlying the hopper elements, the hopper elements including impermeable side walls juxtaposed to form a hopper assembly of maximum capacity and minimum footprint and a front wall with feed apertures to enable birds to access bird food within the hopper element. Each hopper may be selectively removed and replaced without disturbing the other elements. In one embodiment, the hopper elements form segments of an inverted frustoconical hopper assembly which may be selectively and individually removed from the bird feeder without disassembling the housing.

Abstract: A gazebo-style bird feeder wherein a housing includes a plurality of modular hopper elements with a floor underlying and supporting the hopper elements and a roof overlying the hopper elements, the roof being movable relative to the floor to enable the hopper elements to be selectively removed from the housing to be cleaned, refilled or replaced when empty. The roof may simply rest on a plurality of vertical posts and be otherwise unattached to the posts with a rope having opposed ends connected to the floor and an intermediate portion passing through apertures in the roof and forming a loop for attachment to a supporting element. Each of the hopper elements is preferably rectangular in transverse cross-section, and comprises a pair of spaced, generally triangular, parallel sides interconnected by a pair of spaced, generally rectangular, sides angled from the upper portion of the hopper element to the lower portion thereof, with the parallel sides of adjacent hopper elements juxtaposed in the housing.

Abstract: An electronic animal trap incorporating an inclined plane trap assembly is capable to preclude an animal on the tilting floor member of the trap assembly from engaging the top and/or side edges of the door member of the trap assembly in an attempt to escape from the trap by pulling the door member down to thereby unblock access to the entrance opening. An electronic circuit is connected to a bottom plate so that when animal's weight causes the inclined ramp to lower and contact the bottom plate the circuit is completed and the animal receives a charge of sufficient power to cause electrocution. A plastic version of the electronic animal trap assembly enables many of the structural elements to be economically manufactured and easily assembled.

Abstract: An electronic animal trap incorporating an inclined plane trap assembly is capable to preclude an animal on the tilting floor member of the trap assembly from engaging the top and/or side edges of the door member of the trap assembly in an attempt to escape from the trap by pulling the door member down to thereby unblock access to the entrance opening. An electronic circuit is connected to a bottom plate so that when animal's weight causes the inclined ramp to lower and contact the bottom plate the circuit is completed and the animal receives a charge of sufficient power to cause electrocution. A plastic version of the electronic animal trap assembly enables many of the structural elements to be economically manufactured and easily assembled.

Abstract: A web e.g. a fibre web as used in the manufacture of textiles is inspected e.g. for thickness uniformity or the like by transillumination, where the web is subject to ambient illumination, the transillumination being effected in modulated fashion whereby to distinguish measuring illumination from ambient illumination. Modulation may be effected by time-chopping a beam or by a narrow spectral band filter to improve signal-to-noise ratio.

Abstract: A relatively simple dual display system, e.g. a map or stand-by graticule superimposed on a radar or main display, is provided by use of holography. A holographic element when illuminated with a reconstruction beam from a light source provides a holographic image of visual information at a postiion behind and spaced from the element itself. The element is mounted an appropriate distance in front of a cathode ray tube such that the holographic image appears at the phosphor surface superimposed on and coincident with the CRT display.

Abstract: In a head-up display system by which visual information from a display is superimposed by means of a combiner on a pilot's view of the outside scene, the pilot's view is recorded by a head mounted camera to which light from the outside scene and superimposed display is reflected by a head-mounted mirror. The arrangement is particularly useful for pilot training purposes.

Abstract: Low light level or night vision apparatus, and particularly goggles, having an objective lens to focus incident light on to an image intensifier and a magnifier enabling an observer to view a magnified version of the intensified image includes a wavelength selective filter with a hole or aperture through which light of other wavelengths can pass, the wavelength selective filter or means associated with the hole or aperture being arranged to have a focussing effect so that light from a distant scene or object of a wavelength passed by the filter can be properly focussed on the image intensifier, and light from a near scene or object passing through the hole or aperture can simultaneously also be properly focussed on the image intensifier, so that either or both images can be viewed in a focussed condition without adjustment of the apparatus.

Abstract: This invention provides a head up display apparatus particularly for use by the pilot of an aircraft including a cathode ray tube to display visual information to the pilot, means for mounting the cathode ray tube on the head of the pilot and a combiner also mounted on the pilot's head to superimpose an image of the displayed information on the pilots view. The apparatus includes a visual information relay system with a visual information source and display means arranged to view the visual information source and operatively connected with the cathode ray tube to display the visual information so viewed. The relay system includes a component arranged to be mounted at a fixed position and a component arranged to be mounted on the pilot's head so that a change of angular position of the pilots head produces a change of position of the visual information relative to the display means and a corresponding change of position of the display of the information on the cathode ray tube.