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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 4248357 | Floating roof drain A drain for gravity removal of water from the deck of a floating roof in a tank. The drain comprises a flexible coiled hose having a lower outlet end in communication with a conduit inlet in a lower portion of the tank, and an upper inlet end in communica... | 02/03/1981 |
| 4248358 | Quality-preserving hot-food dispenser A coin-controlled dispenser for heated cans of food or beverage has separate heat-insulated chutes for holding cans of different commodities. Each chute is divided by a heat-barrier into an upper unheated storage section and a lower can-heating section. C... | 02/03/1981 |
| 4248359 | Weigh-out system for collapsible surge bin Apparatus for weighing-out material from a collapsible surge bin. The surge bin is mounted above a collapsible frame such that the points of attachment of the surge bin to the collapsible frame comprise a load cell for weighing the surge bin and the conte... | 02/03/1981 |
| 4248360 | Remote control cap for a spray can A remote control cap that is adapted to snap fit onto a spray can's head, the cap being of a unitary or one piece molded plastic structure. The cap includes a lever arm connected to a snap-on collar by inherently resilient leaf springs, the leaf springs n... | 02/03/1981 |
| 4248361 | Toothpaste tube holding and closing device Apparatus for holding and closing tubes of the type used for toothpaste and toiletries in general is disclosed. The apparatus includes a primary tube guide and a secondary guide, a tapered plug axially centered with the guide and a support for holding the... | 02/03/1981 |
| 4248362 | Dispenser closure A dispenser closure comprising a tubular spout to be connected at one end to a fluid container and a cap fitted to the other end of the spout, said cap being provided with a transverse wall of elastomeric material extending across the other end of the spo... | 02/03/1981 |
| 4248363 | Garment hanger An improved garment hanger for supporting a plurality of clothing articles alongside each other such that no one of the garments obscures or otherwise interferes with the display of another by providing the shoulders of the hanger with arms that are space... | 02/03/1981 |
| 4248364 | Article carrier A self-standing carrier for articles comprising an elongated flexible web fitted with a plurality of generally -shaped supporting frame members, the upper ends of the frame members being flexible and connected to handles in the ends of the web.... | 02/03/1981 |
| 4248365 | Portable ski equipment carrier A portable ski equipment carrier includes a ski holder section having a bottom and first and second vertical sides. A pair of skis are positioned edgewise on a rectangular foam pad attached to the bottom of the ski carrier section. A boot tree having a sl... | 02/03/1981 |
| 4248366 | Adjustable beverage container holder A beverage container carrier is formed with a sleeve-like casing and a flexible line formed in a loop. The extremities of the line are threaded through columns of apertures on either side of the casing. The extremities of the line will remain adjustably l... | 02/03/1981 |
| 4248367 | Convertible pack assembly A pack assembly includes a plurality of frame sections each having side braces connected by pivotal joints and provided with a shiftable pack mount including slidable locking sleeves. With the pack mount in a first position juxtaposed an intermediate one ... | 02/03/1981 |
| 4248368 | Device for supporting duck decoys or the like A device for supporting duck decoys or the like has a base with a slot opening on one end of the base. A latch movably mounted on the base selectively opens and closes the slot at the one end of the base. Decoys having weights attached by lines are suspen... | 02/03/1981 |
| 4248369 | Laser cutting of ceramic tubing Polycrystalline alumina tubing is scribed by means of laser pulses which are reiteratively focused on the same spots at spaced time intervals. By drilling small holes, the laser need be on for a very short period of time only, and only the surface layers ... | 02/03/1981 |
| 4248370 | Equipment for breaking the scrap or useful parts away from stamped workpieces from flat material Apparatus is provided for breaking parts away from workpieces which includes a first set of work-engaging fingers arranged on one side of the workpiece and a second set of work-engaging fingers arranged on the other side of the workpiece. Oppositely-dispo... | 02/03/1981 |
| 4248371 | Welding machine A welding machine can form continuous welds of three hundred and sixty degrees on workpieces which are rotated through angles of less than three hundred and sixty degrees by moving the welding torch of that welding machine in one direction circumferential... | 02/03/1981 |
| 4248372 | Apparatus for automatically welding corrugated membranes An apparatus for automatically welding corrugated membranes of a type in which a welding torch is mounted on a head attached to the welding apparatus proper by way of an arc gear segment and the arc gear segment is driven through a pinion gear, whereby th... | 02/03/1981 |
| 4248373 | Explosive charge for explosive welding of large diameter metal pipe A method is provided for the explosive welding together of sections of large diameter metal pipe of the kind used in the construction of high volume oil and gas pipelines. In the method, internal and external band charges of welding explosive are simultan... | 02/03/1981 |
| 4248374 | Engine cooling system thermostat and method of making the same A vehicle type thermostat having a housing provided with a valve seat that is controlled by a movable valve member is interconnected to a temperature responsive device carried by the housing, the housing having interference fit positioning abutments there... | 02/03/1981 |
| 4248375 | Clock thermostat apparatus having means for reducing the setback temperature when the normal temperature selection is turned down A clock thermostat apparatus adapted for controlling temperature conditioning apparatus maintains a normal control temperature in a space and during certain selected time periods deviating from the normal temperature control by resetting the normal temper... | 02/03/1981 |
| 4248376 | Thermally-controlled valve A valve is provided of the type which includes a valve housing having a valve seat, a thermal control element mounted in the valve housing having a thin, rigid wall portion and a membrane member coupled peripherally with the wall portion, so as to define ... | 02/03/1981 |
| 4248377 | Controllable heating means for small masses, particularly the expansion medium in heat setting apparatuses The invention relates to a controlled heating system for maintaining a predetermined or set temperature in a medium of small dimensions which may be a gas, liquid or solid. A single element such as a power transistor functions as a heat transfer device fo... | 02/03/1981 |
| 4248378 | Self priming devices for indirect domestic water heating systems This invention relates to self-priming devices for indirect domestic water heating systems which device acts as expansion and contraction chambers for primary and secondary water in the system. The device consists of a closed housing divided internally by... | 02/03/1981 |
| 4248379 | Powder spray color change system An electrostatic powder coating system for selectively spraying any one of a plurality of different pulverant powder materials from a common spray gun without the necessity for physically disconnecting or reconnecting the spray source of the different pul... | 02/03/1981 |
| 4248380 | Aqueous-based air treating systems A system for the controlled release of air treating material comprising a hydrophilic membrane secured to a reservoir containing an active ingredient in aqueous medium, the membrane serving as the means for releasing the active ingredient to the atmospher... | 02/03/1981 |
| 4248381 | Agricultural spray nozzle with fluid operated orifice cleaning member A device that is capable of unclogging a sprayer nozzle from the operator's platform and also acts as a no drip device and is capable of performing said operations in the presence of abrasion, corrosive action, and the buildup of dried material found in t... | 02/03/1981 |
| 4248382 | Spinner type water winch A self-propelled water winch for spraying water over an area and moving down a predetermined path defined by a cable. The water winch includes a frame member having wheels for supporting the frame member and for allowing movement along the path defined by... | 02/03/1981 |
| 4248383 | Washer system for transparent surfaces on a vehicle A washer system for transparent surfaces such as headlamp lenses and windshields has a liquid delivery chamber of a predetermined volume which is supplied with liquid through a one-way valve from a liquid storage chamber having a larger predetermined volu... | 02/03/1981 |
| 4248384 | Cutting torch having integral head mixer A cutting torch that obviates the tendency to have flashback and sustain burning yet have the inherent flexibility of injector type mixer torches, including a cutting oxygen valve and passageway, a mixing oxygen valve and passageway, a fuel gas valve and ... | 02/03/1981 |
| 4248385 | Adjustable nozzle An adjustable fluid control valve utilizes a fluid flow controlling piston in cooperation with a rotatable cap which causes fluid pressure to move the piston to any desired nozzle fluid flow control setting from closed to full open. The piston contains a ... | 02/03/1981 |
| 4248386 | Electrostatic deposition apparatus A hand-held manually operable deposition gun for projecting electrostatically charged particles. The gun includes at its front end means for discharging the particles, which may be either liquid or solid, and an electrode for electrostatically charging th... | 02/03/1981 |
| 4248387 | Method and apparatus for comminuting material in a re-entrant circulating stream mill A re-entrant circulating stream mill vents a part of the circulating stream adjacent the annular peripheral wall of the mill directly to the junction in each of a plurality of sets of pressure nozzles and cooperating acceleration tubes which are used to f... | 02/03/1981 |
| 4248388 | Apparatus for cancelling non-refillable glass bottles Apparatus for cancelling non-refillable bottles has an unloading section, where the bottles are received and sorted for color, if necesssary. The bottles then proceed to a counting section having a plurality of counting channels containing counters for th... | 02/03/1981 |
| 4248389 | Container sorting and handling system A novel container sorting and handling system is provided for sorting a plurality of diverse types of containers into preselected types for either reuse, reclamation or disposal depending upon the type of container. The sorting system comprises a housing ... | 02/03/1981 |
| 4248390 | Rock crushing machine with rotary eccentric jaw driving mechanism A rock crusher includes a rotary eccentric drive mechanism for imparting substantially linear motion to a movable jaw between a pair of fixed jaws. A driven cam shaft cooperates with a surrounding eccentric sleeve to impart this motion to the jaw. In one ... | 02/03/1981 |
| 4248391 | Holder for rolls of paper A holder for a paper towel roll or toilet paper roll. A stationary base member has an annular flat rim surrounding a central frustoconical projection. A rotatable member also has an annular flat rim surrounding a central hollow frustoconical projection th... | 02/03/1981 |
| 4248392 | Apparatus for application of plastics stretch films The invention is an improved apparatus for the application of plastics stretch films to materials and items to be packaged and secured as a unit or packaged and secured to a shipping and transporting means. The apparatus consists of a pair of insertable a... | 02/03/1981 |
| 4248393 | Cassette tape storing case A cassette case for containing a magnetic tape in which at least one front guide part which is provided opposing magnetic heads is a movable guide part which operates to incline the magnetic tape from an axial line of said movable part.... | 02/03/1981 |
| 4248394 | Remote control hang glider towing aircraft A remotely controlled powered aircraft equipped with engine, propeller and landing gear, radio-controlled from the ground and capable of towing a manned hang glider to an appropriate altitude. On reaching altitude, the pilot of the hang glider releases th... | 02/03/1981 |
| 4248395 | Airplane wing trailing-edge flap-mounting mechanism Dual flap sections are supported by linkage, first for chordwise movement of the forward flap section rearwardly from the wing and for chordwise movement of the rear flap section rearwardly from the forward flap section, and then for tilting of the two fl... | 02/03/1981 |
| 4248396 | Method and apparatus for detecting railroad cars A system for detecting railroad cars in a moving train. The cars are assumed to be of the type having two wheel trucks, each with at least two axles arranged adjacent to each other such that the maximum distance between the axles of a single truck is less... | 02/03/1981 |
