Abstract: A method and structure for mounting fluorescent samples, e.g., fluorescent microbeads, are based on immobilizing the samples in a gel which preserves the spectral properties of the samples and mounting the gel containing the samples on a slide and beneath a coverslip.

Abstract: An insect trap, particularly suited to trapping fleas, comprises a flat, shallow rectangular pan adapted for resting on the floor, flypaper or other sticky substance confined in the pan for trapping the insects, a rectangular light reflecting cover, wire-formed leg members adapted to resiliently grasp selected edges of the pan in fixed positions and support the cover over the pan, and an electrically energized light source suspended from the light reflecting underside of the cover so as to lure insects to the pan by means of both reflected light and directly radiated light. The color of light seen by the insect may be modified by changing the color of the cover, the light source or the reflective surface.

Abstract: Attack of the refractory containment by the slag in an ironmaking or steelmaking vessel is prevented by means providing a continuously replenished thin film of liquid iron or steel between the slag and the refractory.

Abstract: A method and apparatus for removing water from a package loaded open top basket having a bottom wall, end and side walls with numerous ribs, crevices and openings conducive to collecting water are based on using spaced apart pressurized air and vacuum sources operated so as to sequentially accumulate and move the water downwardly and to a location near a suction source on one side of the basket, then to a location near a suction source on the opposite side of the basket and finally by applying suction to the bottom of the basket.

Abstract: A concrete troweling machine is illustrated as having two sets of troweling blades with a mechanism for setting the tilt of individual blades in a rotor assembly and a separate mechanism controlled by the handle position for progressively changing the tilt of individual blades during each rotation of each set of blades to generate blade reactive forces for propelling the machine in selected direction.

Abstract: An improved paddle for canoe or kayak recreational or competitive paddling incorporates crossbar structure formed such that when incorporated either with a single blade canoe paddle or with a double blade kayak paddle both hands grip available crossbars when stroking on either side of the canoe or kayak.

Abstract: An improved athletic sock particularly intended for soccer incorporates a full leg sock over which is secured another partial sock structure between which the shin guard is nested.

Abstract: A material spreader for handling both rock and powder-like materials incorporates a hopper assembly with a hydraulically motor driven side discharge as compared to the conventional bottom discharge. The hopper assembly in one embodiment is supported directly above the surface being covered by hydraulically motor driven wheeled frames and in another embodiment is supported by a carriage on a bridge spanning the work surface. A gasoline engine driven hydraulic system mounts on and moves with the hopper assembly during spreading and includes a mechanism for automatically reversing the direction of travel.

Abstract: Circuitry is provided for a vehicle which automatically turns on the vehicle's headlights during operation of the windshield wipers of the vehicle. A signal voltage is supplied to the circuit from either the power line to the wiper motor or, in the case of pneumatic wipers, through a pressure actuated switch mounted on the wiper motor air line. The signal voltage opens a first transistor, which through a voltage network opens a second power transistor. The power transistor then closes a circuit between the main and lighting circuit power lines of the vehicle.

Abstract: A lightweight and portable screed utilizes an extruded beam element as the principal structural element. The extruded beam element provides a mounting surface for both a handle and a gasoline engine, a housing for a vibrating shaft driven by the engine, a screed surface vibrated by the shaft and support surfaces for supporting the ends of the screed on forms.

Abstract: The apparatus of the invention relates to a recreational apparatus for rebounding balls, and the like, thrown against it. The apparatus is constructed comprising three net planes and four playing surfaces so that two players may simultaneously use the apparatus by playing on opposite sides thereof. The frame has horizontal bars and side legs and can be separated into portions for breakdown purposes. Each of the three net sections is attached to the frame by spaced resilient members.

Abstract: A motorized dump-type vehicle is provided having a chassis frame, a gasoline engine mounted on said frame, a dump container pivotally mounted on the front of said frame and a hydraulic system enabling said container to be raised and lowered by a hydraulic cylinder and said vehicle to be driven in either forward or reverse directions and braked by hydraulic drive motors. The hydraulic fluid is cooled by an oil reservoir tank forming a structural part of the frame and positioned such that heat from the hydraulic fluid can dissipate itself in the container and its contents.

Abstract: An improved optical delivery assembly for an argon-ion or similar medical laser attaches to a wobble plate for thermal tracking and supports in a single integral subassembly an adjustable focusing lens, a beam splitter and associated light detector enabling selective display of power at both proximal and distal ends of the fiber, scattering and blocking shutters, a scattering shutter position sensor, shutter control solenoids, an optical plug position sensor and an optical plug mounting block adapted to interchangeably receive any of several types of optical fiber connecting plugs.

Abstract: An emergency transport neck immobilizing brace incorporates a frame structure adapted for mounting on the shoulders of a patient suspected of having a neck injury and securable to the body of the patient by both crotch and shoulder straps. The brace frame mounts a head halter with a two-point strap suspension arrangement and a ratchet mechanism for placing the patient's head in traction. Cushion devices are also provided to limit both forward and backward and lateral movement of the patient's head after being placed in traction.

Abstract: An apparatus and method for resurfacing valve seats in a cylinder head are based upon utilizing a modified constant velocity universal joint of the type used in front wheel drive automobiles. A valve seat resurfacing cutting tool is driven at a constant velocity by the universal joint. Use of such joint allows the series of valve seats having parallel valve stem guide holes to be resurfaced after bringing the axis of one of the corresponding valve stem guide holes into a precise vertical position.

Abstract: An automatic trailer hitch assembly mounts a shank unit on the trailer and a receiving unit on the towing vehicle. The shank unit provides an elongated shank member which mounts a trailer ball at one end coupled to a conventional trailer hitch ball socket housing secured to the trailer and at the opposite end is formed to slide on funnel-like guide passages into the receiving unit. A spring leveler assembly is detachably secured as a subassembly to the trailing end of the shank unit, releasably grasps the ball socket housing and retains the shank unit properly positioned for coupling. The receiving unit has a locking pin which can be latched into a position allowing entry of the shank member into the receiving unit and when the shank unit is properly positioned therein is automatically unlatched and moved into a position for locking the shank unit and receiving unit together. The locking pin can also be restored to a latched position which enables the shank unit to be withdrawn from the receiving unit.