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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 |
| 4384962 | Fuel-water separator A fuel-water separator comprises a container having entry and exit ports and a progression of spaces through which the fuel moves. The spaces become progressively smaller and are arranged to direct the fuel through a series of downwardly and upwardly dire... | 05/24/1983 |
| 4383194 | Electro-acoustic transducer element Electro-acoustic transducer element having its resonant frequency in a lower frequency range advantageously usable for diagnostic purposes comprises a polymeric piezoelectric film such as polyvinylidene fluoride film being coupled with an additional layer... | 05/10/1983 |
| 4381079 | Atomizing device motor An apparatus for atomizing and dispensing a coating material includes a turbine having a housing and a shaft for rotatably supporting an atomizing device. The shaft includes an outer end extending from the housing for mounting the atomizing device. The at... | 04/26/1983 |
| 4368873 | Vehicular mounted pipe presser A vehicular mounted pipe presser includes a pipe-pressing assembly for pressing pipe through a medium wherein the assembly is movably supported by a vehicle and positionable between surfaces which are transverse to the direction of forces employed to pres... | 01/18/1983 |
| 4368062 | Glassware forming speed control system A method and apparatus for controlling the rate of operation of a glassware forming system including a temperature sensing device positioned in the blank and blow molds of an I.S. machine. The mean temperature over a period of time is derived for each of ... | 01/11/1983 |
| 4366947 | Calibrated gas-metering apparatus A calibrated gas-metering valve is disclosed which includes a two-part valve body having a gas inlet, a gas outlet, and a metering element therebetween. The metering element has a first and a second hole therein, which first and second hole intersect and ... | 01/04/1983 |
| 4366894 | Side frame assembly for roller conveyor systems A profiled upright side support rail for supporting rollers for rotation about transverse axes suitably spaced apart in the longitudinal direction of a conveyor system is generally L-shaped in cross section and is elevated in spaced relationship to a base... | 01/04/1983 |
| 4366866 | Split escutcheon system An escutcheon system to provide a decorative surface about the sprinkler head of a fire protection system may be provided by two identical molded plastic parts and a molded plastic shim. Each of the parts can provide half of the decorative surface with en... | 01/04/1983 |
| 4365988 | Fluid-mixing apparatus and method A body of liquid, such as an aqueous fertilizer mixture, in a tank is stirred and mixed by apparatus which produces a pattern of recirculating flow including a zone of rapid streamline flow in the tank, preferably an upwardly diverging conical pattern and... | 12/28/1982 |
| 4364895 | Fluid-assisted core-release method and apparatus An apparatus for assisting in the removal of an ejection-molded article from the core of a mold is disclosed in combination with a molding machine in which the mold core is fixed to a moving platen and an ejector mechanism is supplied which mechanically r... | 12/21/1982 |
| 4364327 | Stripping excess coating liquid from moving strip materials In gas stripping excess coating material (such as molten zinc) from rising sheet material (such as continuous steel strip) uneven coating adjacent the strip edges is deterred by a baffle plate having a vertical portion held close to but not touching the s... | 12/21/1982 |
| 4363458 | Airfoil structure An airfoil structure including an elongate hollow container which, in use provides an airfoil cross-section between the longer edge regions of the container. A space is provided for so stiffening the leading edge region, that when the structure is in use ... | 12/14/1982 |
| 4363295 | Movable head engine An internal combustion engine utilizing either an Otto or a Diesel cycle contains two opposed pistons in each cylinder. The first piston drives a crank arm which drives a crankshaft. The crankshaft, through a timing means, drives an eccentric positive-mot... | 12/14/1982 |
| 4362568 | Petroleum distillate free prime coat material A petroleum distillate-free or essentially petroleum distillate-free prime coat material for application to absorptive surfaces, such as untreated road or street surfaces, which is designed to penetrate, bond, and stabilize such existing surfaces and to p... | 12/07/1982 |
| 4362327 | Separable pipe and/or armature connection A pipe or armature connection includes two interfitting connecting members. The connecting members include surfaces providing axial and radial guidance upon their assembly but require only a small space for assembly and disassembly. One of the connecting ... | 12/07/1982 |
| 4362260 | Yarn feeding apparatus A high speed yarn feeding apparatus for feeding yarn from a yarn supply source to a yarn take-up apparatus is disclosed which is capable of being threaded by conventionally employed suction nozzles. The yarn feeding apparatus employs at least one stepped ... | 12/07/1982 |
| 4362124 | Analog paint output control A coating material quantity control system for the coating of articles in a production line operation having a plurality of coating material dispensing devices. Each device is connected to a plurality of coating material feed lines carrying various coatin... | 12/07/1982 |
| 4359242 | Collapsible baby walker-jumper A walker-jumper comprises a support member carrying a seat for a child, a base member, and a collapsible and expandable frame connecting the support and base members to allow adjustment so that the feet of the child can contact the ground to propel the wa... | 11/16/1982 |
| 4359226 | Board game with interrelated cards and chips A game embodies the celestial concept of Karma and the repayment in future lives for deeds done in past lives. The game has a board around which are playing positions and an inner register for indicating the number of revolutions around the board. At vari... | 11/16/1982 |
| 4358024 | Container closure A closure for a container having a radial groove on an inside surface of the mouth of the container includes a lid portion having a central disk with an upstanding wall at the periphery of the disk for contacting the inside surface of the mouth of the con... | 11/09/1982 |
| 4357966 | Method and apparatus for making floral baskets A collapsible frame for supporting a container is manufactured from two loops formed from a single length of wire which are intertwined to form a handle and sprung to form base members which are yieldably urged apart. An inwardly narrowed neck portion is ... | 11/09/1982 |
| 4356868 | Fire-extinguishant system A fire-extinguishant system includes a source of extinguishant, such as carbon dioxide, a fusible length of plastic tubing, such as one-half-inch-outside-diameter polyethylene tubing, with the end closed, and a conduit and valve system for connecting the ... | 11/02/1982 |
| 4355821 | Display binder A loose-leaf display binder formed of a cover of flexible sheet material, preferably of one piece and of uniform bendability from top to bottom, which forms front and back cover panels hinged to a spine panel, and also a triangular brace panel hinged to t... | 10/26/1982 |
| 4351524 | Swing A swing according to the present invention includes a pair of side frame members, a sling forming at least one seat well and seat back, a first suspension system for supporting the sling from the side frame members and for adjusting the depth of the seat ... | 09/28/1982 |
| 4351350 | Valving assembly for a liquid-containing tank A valving assembly for a liquid-containing tank comprises a housing which includes vent and valve passageways extending axially therethrough. A roll-over valve is supported in the vent passageway by a spring which is calibrated normally to open the vent p... | 09/28/1982 |
| 4350720 | Uncontaminated purge solvent recovery system A recovery system for solvent used to clean coating material from a multiple-color coating material dispensing system which undergoes frequent color changes includes a vacuum source over the recovered solvent in a recovery tank. The system is switched dur... | 09/21/1982 |
| 4350437 | Apparatus and method for producing images of various sizes on photosensitive film An apparatus for producing images of various sizes on photosensitive film from either a photographic negative or positive which includes a photographic image having a predetermined size using a light source to expose the film to the image includes a first... | 09/21/1982 |
| 4348425 | Variable low-pressure fluid color change cycle Automatic finish coating equipment employs a selectively variable low-pressure or "soft" air or solvent signal to control pushing of coating material through a feed tube from a coating material source to a coating material atomizing and dispensing device.... | 09/07/1982 |
| 4347741 | Control system for a capacitive level sensor A capacitive system for sensing the level of material includes a conductive member electrically connected to ground potential, a probe including a sensing element arranged to establish a capacitance between the sensing element and conductive member which ... | 09/07/1982 |
| 4347130 | Placer mineral concentrator and process The present invention provides for a device and process for extracting heavy particles from lighter particles. The inventive device uses a unique riffle action, causing separation of heavy mineral from waste material, in combination with centrifugal force... | 08/31/1982 |
| 4345514 | Continuous hamburger grill A continuous rotary hamburger grill has means for forming unshaped balls or scoops or other quantums of ground meat into hamburger patties as it presses them into cooking relation with the rotating grill plate. The meat quantums deposited on the grill pla... | 08/24/1982 |
| 4344662 | Retainer for elastomeric electrical connector A retainer for retaining an elastomeric electrical connector in operable position between opposed sets of spaced electrically conductive areas has a generally planar body of electrically non-conductive material having substantially parallel top and bottom... | 08/17/1982 |
| 4344568 | Closed-loop heat-reclaiming system A closed-loop heat-transfer system includes in combination an exhaust chamber for positioning in series with a chimney flue of a heating system wherein the exhaust chamber has an exhaust inlet and an exhaust outlet opening adapted for connecting the chamb... | 08/17/1982 |
| 4344419 | Acrylooptic tongue depressor and handle therefor A combination handle unit and tongue depressor includes a light source and a means for attaching a light-transmissive disposable depressor member to the handle to conduct light from the source into, for example, the mouth and throat of a patient being exa... | 08/17/1982 |
| 4343656 | Process for monitoring tank inside cleaners driven by cleansers A process for cleaning tank interiors uses a rotary element and a cleanser discharge nozzle and monitors the completion of each full revolution of the rotary element. The cleanser quantity made available per unit of time is monitored and/or controlled or ... | 08/10/1982 |
| 4343420 | Retrieval and storage device for flexible elements An apparatus for retrieving and storing an elongated flexible element such as an electrical cord, garden hose, air hose, vacuum hose, rope, or the like. The elongated flexible element has a first end for attachment to a service and a second end for attach... | 08/10/1982 |
| 4343233 | Apparatus for producing and collecting a liquid extract and a dry by-product from a mash An apparatus for producing and collecting a liquid extract and a pressed dry by-product from a mash of fibrous material includes an extraction chamber and a mechanism for compressing the mash of fibrous material within the extraction chamber to extract th... | 08/10/1982 |
| 4342615 | Plywood layup line A method and apparatus for assembling plywood laminate structures on a plywood assembly line utilize a first conveyor extending through an assembly area. Plywood back sheets are loaded onto the entry end of the first conveyor in end-to-end abutting relati... | 08/03/1982 |
| 4342478 | Knob-connector spring A biasing spring especially for a doorknob keeper or other knob to knob-sleeve connector and the combination thereof with a knob connector of any of various types, but in particular a plate mounted for radial movement in a plane normal to the axis of a kn... | 08/03/1982 |
| 4342214 | Pilot assembly for progressive die machines A pilot assembly as for locating a workpiece in successive forming stages of a machine, such as a punch press, where the workpiece is progressively moved through the forming stages of the machine. The pilot assembly includes a pilot pin mounted to a movab... | 08/03/1982 |
