William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 4460129 | Turbulent flow emitter A drip irrigation emitter where turbulent flow and angled ribs in a tortuous channel reduce fluid pressure, providing for minimal variations in outlet flow rate from the emitter, irrespective of emitter inlet pressure.... | 07/17/1984 |
| 4455110 | High volume railway hopper car In a railway hopper car the void space previously provided between the slope sheets of adjacent hoppers is eliminated except for a small area in the longitudinal center of the car. Transversely spaced hopper slope sheets extend downwardly to an outlet mou... | 06/19/1984 |
| 4453626 | Vibratory feeding apparatus An apparatus for orienting and feeding axially elongated articles has a feeder bowl which includes a helical ramp surface which terminates at the upper edge of the bowl. An annular ring supported for rotation around an upper portion of the feeder bowl has... | 06/12/1984 |
| 4449861 | System for transporting plastics articles This invention provides an improved system for transporting plastics articles such as containers for foods from one place such as a plastics articles-manufacturing plant to another such as a goods-charging plant and encompasses vehicle means for transport... | 05/22/1984 |
| 4448355 | Watering pistol A pistol for dispensing a watering liquid to plants and the like has a crenellated pistol grip portion, the crenellations whereof are a latching member for a swinging pawl which is actuated by a handle, an upper projecting portion of said handle having al... | 05/15/1984 |
| 4445643 | Irrigation system A reel type irrigation system adapted to be connected to a source of liquid under pressure to distribute the liquid on the ground including a reel unit with a rotatable reel and drive means adapted to rotate the reel in a given direction when the drive me... | 05/01/1984 |
| 4442977 | Airless electric sprayer An improved airless electric sprayer is disclosed having superior balance, portability, receptacle interchangeability, cleanability and a non-tipping stand feature. The user's hand conveniently grasps a piston grip in close proximity to the nozzle for acc... | 04/17/1984 |
| 4438883 | Dynamic pressure attenuator and method A dynamic pressure attenuator comprising a housing and a plurality of tubes extending through the interior of the housing and defining wind passages. Each of the tubes has a plurality of radially extending ports. The housing has an inlet to admit a gas to... | 03/27/1984 |
| 4437565 | Conveyor chain The invention relates to a conveyor chain intended for use, for example, in wood transporters. In order to be able to securely fasten the sleeves and the trunnions of the chain to their side plates, preferably by welding, projecting edge flanges are forme... | 03/20/1984 |
| 4437798 | Valve for discharge outlet and actuating means therefore Valve means are provided in a discharge opening movable between a closed position blocking communication between a hopper compartment and a discharge conduit. The valve means comprises a segment of an arc which in a closed position spans the distance betw... | 03/20/1984 |
| 4437614 | Electrostatic air atomization spray coating system An electrostatic air atomization spray coating system having a hand held spray gun, wherein a flow of air to the gun is sensed to control energization of a high voltage power supply for electrostatically charging spray particles, is characterized by a byp... | 03/20/1984 |
| 4436456 | Pneumatic communication system for banking and the like A pneumatic system for banking consists of a pair of upright customer and teller terminals joined at right angles at their lower ends by a carrier transit tube. Each terminal includes a carrier elevator, a blower and a special ducting such that while only... | 03/13/1984 |
| 4436457 | Suction pipe Each section of telescoping pipe is supported by a hanger depending from a straight, horizontal, elevated, transverse beam. The beam is mounted for traverse travel on overhead structures. A special suction head is carried by a carriage and connected to th... | 03/13/1984 |
| 4434886 | Apparatus and methods for positioning electrical components An electrical component positioning apparatus includes a frame with first and second substantially horizontally extending conically tapered rollers rotatably mounted upon the frame. Edges of the first and second rollers closest to each other are arranged ... | 03/06/1984 |
| 4431137 | Sources for spraying liquid metals A source for producing a spray of drops and ions of a liquid material under the action of an electric field, comprises an emitting point in the shape of a cone with a rounded tip, the vertex angle of which is between thirty and forty degrees and which pro... | 02/14/1984 |
| 4428474 | Apparatus for the alignment of bottles or the like, particularly labeling machines A rotating radial unit has bottle receiving recesses on its periphery for accepting bottles from a linear conveyor. A pair of elements are mounted on the unit adjacent each receiver for moving towards and away from the receiver. A belt runs around rolls t... | 01/31/1984 |
| 4427106 | Means for supporting idler rollers in conveyor systems Disclosed is a conveyor system including a plurality of idler rollers for supporting the return leg of an endless conveyor belt and extending across the full width thereof. Said rollers being carried for free rotation about axle shafts having end portions... | 01/24/1984 |
| 4424894 | Sequencing lamp feeder A sequencing drop chute apparatus receives a batch of electrical components and feeds them one at a time to a single line conveyor. The sequencing drop chute apparatus includes a support frame with an inclined surface attached to the support frame. A plur... | 01/10/1984 |
| 4421275 | Apparatus for applying refractory material to refractory lined vessels Apparatus for applying refractory material to the interior surfaces of vessels adapted to contain molten metal. A pair of concentric conduits separately convey refractory material and water; the inner conduit is stationary and carries the refractory; the ... | 12/20/1983 |
| 4421226 | Article receiving and decelerating device Rapidly descending articles are decelerated in a segmented walled mechanism which alternately decreases in cross-sectional area to decelerate and restrain an article and subsequently increases in cross-sectional area to permit the article to fall safely t... | 12/20/1983 |
| 4420075 | Connecting member for chutes of chain-and-flight conveyors The invention provides a reliable connection between chutes of a heavy-duty chain-and-flight conveyor with considerable side loading. The connecting member is a shaped link, the shouldered end portions of which are coupled with the walls of the chutes to be co... | 12/13/1983 |
| 4420279 | Pressure impulse dense phase conveying apparatus and method An apparatus and method for conveying fluid materials utilizing a venturi having a side opening in the venturi throat section which is opened and closed by pulsing motive fluid into the venturi past a flutter valve, comprising a flexible piece of material... | 12/13/1983 |
| 4418816 | Inertial conveyor An inertial conveyor has at least one transporting surface or section slidably arranged on rails with the rear end of the section sliding over an immovable rest, shifting means, preferably an adjustable spring, which permits the section to shift toward th... | 12/06/1983 |
| 4416423 | Electromagnetically actuatable valve, in particular a fuel injection valve for fuel injection systems An electromagnetically actuatable valve is proposed, which serves in particular to inject fuel into the intake tube of internal combustion engines operating with fuel injection systems. The fuel injection valve includes a valve housing, a shell-type core ... | 11/22/1983 |
| 4416567 | Method and apparatus for transporting mined particles from an elevated site A method of transporting heavier than water particles such as coal from an elevated supply site to a delivery site at a substantial elevation below said elevated supply site comprising the steps of mixing the particles at the supply site with liquid such ... | 11/22/1983 |
| 4416366 | Emergency stop mechanism An emergency stop mechanism for a lifting device capable of moving a load along a predetermined path against and with the force of gravity using a winch-operated primary cable, and wherein the primary cable accomplishes a lifting function by pulling the l... | 11/22/1983 |
| 4415121 | Valve for spraying a mist A valve for spraying material as a mist includes walls forming an elongated passageway having an inlet and an outlet. The passageway is flattened at least at the outlet end. The flattened portion has opposed walls disposed in contact and at least one of t... | 11/15/1983 |
| 4413719 | Method and apparatus for entrapment prevention and lateral guidance in passenger conveyor systems Method and apparatus for minimizing the running clearance gap between stationary skirt panels and moving steps or segments of a passenger conveyor such as an escalator or moving walk, and simultaneously providing lateral guidance for the moving conveyor s... | 11/08/1983 |
| 4413723 | Method and apparatus for conveying a sheet Method and apparatus of conveying a sheet in a turning action to alter its path of movement. The operator has the option of conveying the sheet through a bump turn mode or a flow turn mode. In the bump turn mode, the original sheet leading edge on a first... | 11/08/1983 |
| 4413787 | Apparatus for drip irrigation Drip irrigation apparatus comprising at least one foil element including at least one first surface having a raised pattern formed thereon and defining a portion of a pressure reducing pathway and at least one second surface joined to the at least one fir... | 11/08/1983 |
| 4412611 | Transport mechanism A transport mechanism for use in material handling systems whereby a multiplicity of like objects are automatically and rapidly transported from a storage compartment thereof to a predetermined location. Such mechanism receives a plurality of such objects... | 11/01/1983 |
| 4412657 | Fuel injection nozzles A fuel injection nozzle for supplying fuel to an internal combustion engine includes a fuel pressure actuated valve member slidable within a bore. The working clearance defined between the co-operating surfaces of the valve member and bore at one end comm... | 11/01/1983 |
| 4411356 | Device for transporting printing plates Disclosed is a device for transporting printing plates in a processing unit, in which the printing plates are brought from a starting position into a final position on a processing table. The device comprises a pneumatically operated cylinder 2 located ab... | 10/25/1983 |
| 4410140 | Atomizer and method An oil burner atomizer and method for light and heavy fuel oils where the oil is spread circumferentially of a number of oil delivery bores and two heavy oil flows are formed for each delivery bore. The oil flows are atomized in low-pressure primary air. ... | 10/18/1983 |
| 4410081 | Conveyor system A conveyor system is provided which includes a conveyor table which has an advancing section wherein a conveyor transports racks of small objects from a loading position to a position wherein the racks can be removed from the conveyor or unloaded, and a r... | 10/18/1983 |
| 4408721 | Fitting to combine air and pressurized water A hydro-air jet assembly wherein a ball-shaped element has a first passageway therethrough communicating with an air supply and a second passage therethrough communicating with a water supply which is rotatably mounted in a housing and has a venturi nozzl... | 10/11/1983 |
| 4408722 | Fuel injection nozzle with grooved poppet valve A fuel injection nozzle of the outward opening poppet valve type includes a closure member reciprocable in the axial bore of a spray tip so as to control fuel flow therefrom and to form therewith an annular discharge spray orifice. The closure member incl... | 10/11/1983 |
| 4408687 | Power brake for article feed apparatus An article processing apparatus including a frame and feed conveyor on the frame for supply of a plurality of rows of abutted articles has provided therefore a stop member positioned above the feed conveyor and extending transversely of the rows of abutte... | 10/11/1983 |
| 4407456 | Mixing nozzle A mixing nozzle for producing a small cross-section liquid stream of a first liquid mixed with a second liquid. The nozzle is adapted to be attached to a conventional plumbing hose and includes a nozzle portion for forming the small cross-section liquid, ... | 10/04/1983 |
| 4405043 | Dynamically balanced vibratory system A dynamically balanced vibratory feeder system having a material handling component and a counterweighting component, the two components being drivingly interconnected and driven in opposed relative directions in a balanced fashion. The material handling ... | 09/20/1983 |