Abstract: A counter-flow food chiller provided with an oscillating screw-feed so that the food, while being pushed through the chill tank in a direction contrary to the water flow is also agitated and oscillated, improving the heat exchange and preventing ice formation on the walls of the tank which are cooled by refrigeration.
Abstract: A method of reducing the nitrogen content in iron and iron alloys comprises introducing hydrogen into the melt in the form of a gas or hydrogen compound in sufficient quantity and for a sufficient time to reduce the nitrogen content and subsequently treating the melt to reduce the hydrogen content. The hydrogen may be mixed with an inert gas to minimize the risk of explosion.
Abstract: A safety alarm system for small arms arranged to be incorporated within the structure of the gun. A battery energizes an electronic circuit through a switch activated by the safety mechanism of the gun. A predetermined time after energization the electronic circuit activates a visual or audible alarm to warn the handler that the weapon safety mechanism has been deactivated.
Abstract: A hand sanding tool for sanding corner joints in dry wall construction comprises a resilient foam block shaped to fit the corner and faced with suitable abrasive grit. A carrier is provided for demountably supporting the foam block and properly distributing the force over the faces of the foam block. The carrier is mounted on a handle by a simple universal joint and the handle is arranged to receive an extension piece.
Abstract: A drywall sander comprises an electric motor and a rotary sanding head mounted at opposite ends of an arm so that the machine is balanced when the user grasps the arm just in front of the motor. The sanding is pivotally mounted on the arm so that it self-aligns with the surface being sanded and is connected to the motor by a flexible drive. The abrasive surface in said sanding head is surrounded by an enclosure to catch the dust.
Abstract: A screw top closure is provided with a freely rotating ring surrounding its periphery thus preventing the user from rotating the closure by gripping the periphery. The ring is captivated on the closure and cannot easily be removed. The closure is provided with a key way on its upper surface which the user can engage with a key which is accessible only to authorized users.
Abstract: A folding cart designed to function as a supporting walker or a stackable grocery cart. The frame consists of two pivoted parts, the shorter pivoted at its upper end to points near the center of the longer, and the longer extending thereabove to form a handle. A foldable strut joins the pivoted parts below their junction. A fabric receptacle is foldably supported from the frame generally above the junction of the two pivoted parts. Suitable wheels or pivoted castors are mounted adjacent the lower ends of the two pivoted parts.
Abstract: In a poultry processing conveyor system a plurality of evisceration lines are fed from a single kill line by means of a rotary hock cutter transfer carousel.
Abstract: A package steam boiler consists of four vertical combustion chambers surrounding a central vertical downcomer. A spherical steam drum is mounted at the top of the downcomer and a lower header is mounted at the bottom of the downcomer. The combustion chambers and downcomer are enclosed by tube-in-wall structures.
Abstract: A foldable machinist's tool tray is provided which conveniently supports a pan over the engine compartment of an automobile for example. When in its unfolded position the tray may be wheeled about on its wheels but is prevented from inadvertent movement by a leg which engages the floor. In its folded position the tray is still supported parallel to the floor on its wheels but at a much lower height so that it may be wheeled underneath the automobile.
Abstract: A system for controlling the temperature and humidity of an enclosure such as a museum display case continuously extracts air from the enclosure, increases its humidity, cools it to a controlled temperature, at which point its humidity is 100%. The air is then heated and returned to the enclosure. By selection of the controlled temperature the relative humidity of the returned air may be determined.
Abstract: In a controlled atmosphere storage system the activated charcoal scrubber chamber is partially evacuated before and/or after transfer from scrubbing to re-activation thus reducing the amount of ambient air introduced into the system.
Abstract: An automotive headlight control including means to detect when the automobile engine is operating and cause the headlights to be operated at reduced output. This ensures that when the vehicle is driven, the headlights automatically turn on and reduce the driving hazard.
Abstract: The condition of a gas turbine is monitored by locating a microphone in the air inlet and listening to or recording the sounds detected during certain periods of the machine operating cycle. By proper selection and control of those periods, the operator is enabled to detect rubs or other problems but is not exposed to undesirable noise levels.