Abstract: A tethered, protective mouthguard assembly for attachment to a helmet or headgear including a mouthpiece portion, a connecting member integrally formed with the mouthpiece and provided with a tether attachment element therein, a separate breakaway tether constructed of a cord-like or strap-like material and a corresponding attachment element connected with the tether for selectively and easily attaching the tether to and detaching the tether from the connecting member.

Abstract: A double loop heat storage space heating furnace has a housing with an upper heat storage section containing an electrically heated heat storage brick portion and a lower section containing an air-to-air heat exchanger having first and second air flow passages. The furnace has two separate flow courses. The first flow course uses a room air fan to circulate room air through the first passages of the heat exchanger. The second flow course has a recirculating fan in the lower housing section for recirculating air in a continuous closed loop through the heat storage brick portion to be heated and the second flow passages of the heat exchanger so that heat is delivered from the heated recirculated air and the room air in the heat exchanger. The upper housing section includes a cooling air space surrounding the heat storage brick portion through which the room air fan circulates a portion of the room air to maintain the furnace housing at a temperature similar to that of the room air.

Abstract: A boat and method for treating a body of water which includes continuously scooping surface water as the boat traverses the lake. The method may include the step of adding a neutralizing agent such as lime to a body of water. To avoid forming "hot spots" in the body of water, water is continuously scooped from the surface and treated while in a barge which trails the boat. Neutralized water, instead of lime, is then returned to the lake at a predetermined depth. To treat as much water as quickly as possible, the scoops are funnel-like with parabolic portions, and conduits conveying water from the scoops have high velocity pumps to increase the velocity of the water relative to the speed of the boat. The barge includes a number of compartments for containing a variety of chemicals such as lime. The scooped water may be directed to one or more of the compartments.

Abstract: An apparatus for collapsing and crushing heavy-duty steel well casings and similar pipes to terminate flow of liquids such as crude oil therethrough, a housing portion gripping and sealing spaced portions of the casing, casing collapsing rams at opposite sides of the casing and between said portions of the housing and confined within portions of the housing; and a pair of hydraulic cylinders driving the rams inwardly against the casing to collapse it and crush it to reduce and substantially prevent flow of liquid or crude oil through the casing.

Abstract: A mobile heating system for thawing frozen ground. The system includes a hot water heater, antifreeze reservoir, and pumps mounted on a mobile apparatus such as a trailer for being towed by a car or truck. A line is connectable to the heater and antifreeze reservoir and includes a plurality of elongate heater probes for being implanted in the ground, adjacent a frozen water or sewer line. Circulation of hot water through the line and probes thaw the ground. Alternatively, the probes may be used to heat building material such as bricks.

Abstract: A guard attachable to the lower unit of an outboard motor preventing direct impact between submerged hazards and the elements of the lower unit. The guard includes two angle brackets, a rigid bar attached to the angle brackets at a top end, and a skeg pocket and fin attached to a lower portion of the bar. The guard descends from a position forward of, and substantially level with, the cavitation plate to a point below the skeg. The guard prevents damage to the entire lower unit, including the propeller, upon impact with a submerged obstacle.

Abstract: A machine that includes: A transportation system is disclosed for transporting panels such as wood panels between two cutting stations which cut the panels along different axes. The transportation system includes, between the cutting stations, a work surface of parallel bars. The work surface further includes three portions disposed at different levels while maintaining the bars in a parallel and aligned fashion such that a slide, also including parallel bars, may pass horizontally between the three portions. The slide operates vertically as well as horizontally to pick up the panels for transport among the three work surface portions, whose different heights permit a number of different stages of operation for the slide.

Abstract: An improved fire-extinguisher cabinet for insertion into a vertical wall surface consisting of double fire wall cabinets creating an internal cavity which hold a fire-retardant material. The improved double-walled fire extinguisher cabinet satisfies all the requirements of the Uniform Building Code 43-6 "Fire Tests of Through-Penetration Fire Stops" based on ASTM 81-4-83 of the Warnock Hersey International (WHI) of Middleton, Wis., test label for 1- and 2-hour combustible and noncombustible walls. When installed and exposed to a fire the improved double-walled extinguisher cabinet will not permit and/or will retard the spreading of the fire at the installation sight. In addition, the improved double-walled fire extinguisher cabinet provides a convenient, easily accessible, cabinet for containment of a fire-fighting apparatus.

Abstract: The present disclosure includes an interfacing lift hitch for connection between a tractor and an implement. The hitch includes retractable, implement connecting hooks and is U-shaped to allow operation of the power takeoff of the tractor. The disclosure further includes a drawbar mounting device connectable to the U-shaped lift hitch when the power takeoff is not being operated, and a four point hitch mechanism connected to one of my lift hitches and being operable when the hooks are moved to an out of the way position.

Abstract: A wafer processing apparatus including a head defining an etching chamber, the sidewall of the head being slidable along the base so that the sidewall and base will normally define an etch chamber; and the sidewall may be moved upwardly to open a discharge passage for rinsing water, and a deflecting surface for deflecting the rinsing water downwardly and draining the rinsing water from the passage. The housing is separable above the deflector ring to provide access to the wafer for inserting the wafer and replacing it.

Abstract: A boring head for boring the ground includes a housing of substantially cylindrical configuration. An electric power source, a coil, a switch and an oscillator are mounted within the housing. The coil generates an electromagnetic wave, and the oscillator is connected with the power source, the coil and the switch. The switch is operable to be switched according to an angular position of the housing in a circumferential direction as to whether the angular position is within a predetermined range. The configuration of the electromagnetic wave generated by the coil can be changed through the switch according to the angular position of the housing.

Abstract: A pumpkin decoration wherein a first decorative piece of vinyl sticks via an adhesive to the pumpkin and a second decorative piece of static cling material clings via static cling to the first piece. Third and fourth pieces of static cling material may also cling to the second piece and to each other such that a number of designs may be created. The first decorative piece of vinyl includes an adhesive which is pressure-sensitive such that the first piece may be repeatedly removed and reapplied to the pumpkin.

Abstract: A system for measuring gas permeability of membranes under precise temperature and humidity controls, by the use of a gas detector made from a single metallic block, wherein the gas flow passages are virtually entirely confined within the metallic block, and a temperature control passage is provided in the block for stabilizing temperature of the block and the passages therein, at any predetermined temperature. The detector device also includes passages for forming into liquid reservoirs, for providing a controllable relative humidity by passing the test gases through the mubidifier passages.

Abstract: A cutting station comprising a bed; a work surface supported on the bed; a carriage traveling along the longitudinal axis of the bed by virtue of a first motor; two cutting members connected to two second motors; and a structure supporting the cutting members and second motors, and designed to travel, by virtue of actuators, along vertical slideways supported on the carriage, and to be carried by the carriage during traversing of the same. The bed comprises two fixed parallel beams supporting the work surface, and a first of which also supports two horizontal slideways for supporting and guiding the carriage. The center of gravity of the second motors lies within the space defined between the horizontal slideways.

Abstract: The present vibrating bucket screen attachment for cleaning beaches and for being mounted on mobile machines such as skid-steer loaders includes an outer excavating bucket with a sand-scooping blade and runners on the outer bucket for supporting the outer bucket relative to the beach. An inner vibrating screen bucket is resiliently mounted in the excavating bucket and includes a hydraulically operated vibrator. Resilient bumper pad mounts disposed between the inner and outer buckets suppress the vibrations of the inner vibrating bucket relative the outer excavating bucket. A floor screen portion of the inner bucket is mounted above bottom, sand-engaging portions of the outer bucket such that the screen portion is spaced from the surface of the beach to vibrate freely during the separation of sand from litter.

Abstract: A combination rack and carrying case for carrying and displaying sheets of paper such as sheets of music. As one of its sidewalls, the rack includes a swingable generally Z-shaped rack with outer and inner ledges for supporting the sheets of music. The outer ledge is operable when the rack is in a retracted position. The inner ledge becomes operational when the rack is swung to an elevated, extended position.

Abstract: A tick repellant belt to be worn about the waist of an outdoorsman who wears pants with tightly closed cuffs to ward off or trap bloodsucking arachnids. The belt is comprised of a flexible band having outer and inner surfaces and two ends adapted to releasably interlock to secure the band's inner surface tightly against the outdoorsman to prevent ticks from passing upwardly between the band's inner surface and the outdoorsman. A tick barrier means is located on the outer surface which will prevent the tick from moving upwardly onto the outdoorsman beyond the belt. The tick barrier means includes variations of adhesive surfaces, lubricated surfaces, chemical surfaces and electrical conducting surfaces.

Abstract: A moldable plastic, distortion and warp resistant wafer carrier with forked end wall portions that tie into the sidewalls of the carrier. The forked end wall portions from triangular column like supports between an end wall and sidewalls of the carrier such that the carrier maintains structural integrity even when its temperature fluctuates between ambient and 180.degree. C. temperatures in a relatively short time period. The structural integrity of the carrier is further enhanced by the end wall having an integrally formed bend which is disposed at a right angle relative to the forked end wall portions.

Abstract: A pivotal frame connector or pivotal coupler for pivotally attaching two adjacent display structures wherein each of the display structures includes a skeletal frame formed of a network of elongate support rods joined by hub assemblies which provide for articulation of the support rods. The pivotal frame connector includes ends identical in structure to the ends of the support rods to engage those hub assemblies disposed on the periphery of the display frames. These peripheral hub assemblies have empty unused sockets to which the pivotal frame connector is readily attached. The pivotal frame connector is U-shaped and substantially shorter in length than each of the support rods to remain out of sight and out of the way when the display frame is covered by a skin-like aesthetic covering.

Abstract: A protective wristband with integrally woven inner and outerlayers of an absorbent stretchable fabric material to provide an endless generally hollow interior, and a cushioned shield disposed between the layers such that the shield is concealed to provide the appearance of a conventional, unprotective wristband.