Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 4920576 | Visor-type mask for dentists An improvement upon other inventions of Applicant wherein a visor which is attached to the head of the user supports a shield which hangs in front of the face of the wearer, protecting the eyes, nose and mouth from contamination which might be carried by ... | 05/01/1990 |
| 4920577 | Work pants A pair of work pants comprises two legs joined together at a crotch area, and a protective layer secured to the front of each leg having an upper edge no lower than the crotch area and a lower edge below the knee area, each protective layer being secured ... | 05/01/1990 |
| 4920578 | Patient's gown A patient gown has a body with two arm openings and a neck opening. A front panel or bodice extends downwardly from the neck opening with its side edges providing the front edge of the arm openings. Two bell sleeves extend outwardly over the arm openings ... | 05/01/1990 |
| 4920579 | Apparatus to restrain neck tie tails A tie restraint apparatus for holding a tie tail portion of a four-in-hand neck tie at the front portion of a shirt. The tie tail is an elongated end portion of a neck tie and includes transversely extending fabric strip secured at spaced apart sites to a... | 05/01/1990 |
| 4920580 | Face mask and body prosthesis A facial and/or body prosthesis or appliance is disclosed. The material formed into the final prosthesis is a specific material uniquely adapted for the purpose. The material is a closed-cell, cross-linked, polyethylene and is in sheet form having a thick... | 05/01/1990 |
| 4920581 | Waistband reducer for pants A waistband reducer for pants including an elongate generally elastic and flexible element or strap having a plurality of fastener elements for connection along a waistband to contract the waistband about the wearer's waist.... | 05/01/1990 |
| 4920582 | Universal waste and overflow drain assembly A universal bath waste and overflow drain assembly (10) comprises an overflow tube (12), drain pipe (14), t-connector (16), and an adapter (18) which can be interchanged and connected as desired in different drain configurations according to the requireme... | 05/01/1990 |
| 4920583 | Vibrating toilet seat A vibrating toilet seat is provided, wherein a vibrating motor is placed within a cushioned toilet seat. The motor is automatically actuated when the user sits on the seat. The motor can also be turned on manually. Power for the vibrating unit can be deri... | 05/01/1990 |
| 4920584 | Disposable toilet seat cover and method of manufacture A sanitary toilet seat cover is formed of a nonporous, nondisintegratable material, such as plastic sheet material, for protecting a user from disease-causing micro-organisms. The toilet seat cover of the present invention has integrally formed therewith ... | 05/01/1990 |
| 4920585 | Shield mounting assembly for a safety helmet A safety helmet includes a helmet body having left and right outer sides, a shield rotatably supported on the left and right outer sides of the helmet body, engaging base plates or screws which rotatably support the shield on the left and right outer side... | 05/01/1990 |
| 4920586 | Seat handle attachment A sanitary seat handle has a planar portion for attachment to the underside of a toilet bowl seat. Another planar portion extends radially outward from the rim for maneuvering the seat up or down. The planar extension is a ringlike protrusion which provid... | 05/01/1990 |
| 4920587 | Bedside toilet A bedside toilet apparatus including an elongated platform to support a patient. The platform includes a posterior section, a back section and a leg section which are hinged together so that the platform can be moved from a generally horizontal condition ... | 05/01/1990 |
| 4920588 | Means providing moving water stream ejecting into spa tank In a spa having a tank for body immersion, a flexible tube exhausting pressurized water into the tank having a free end adapted to whip usually in a vertical plane by reaction of the exhausting water. The tube has a cross-section with flattened upper and ... | 05/01/1990 |
| 4920589 | Therapeutic table A kinetic therapeutic table 10 having a frame 12, a planar patient support 14 mounted to the frame 12 for rotation about an elongate axis substantially aligned therewith and adjustable vertically at its foot 20 and head 18 ends. Symmetrical lateral suppor... | 05/01/1990 |
| 4920590 | Invalid lifting and carrying apparatus An invalid lifting and carrying apparatus has a standard (1) on the outside of which a slide (9) is vertically movable. The slide has a cantilever (10) which is fixed tiltable around swivelling axis journals (13). These swivelling axis journals (13) each ... | 05/01/1990 |
| 4920591 | Air support for chair and method for manufacturing chair utilizing the air support An inflatable support device for use in a chair includes two flexible, generally rectangular outer elements which are sealingly connected along corresponding peripheral edge portions, a plurality of parallel connection elements positioned between and conn... | 05/01/1990 |
| 4920592 | Combination hood support, jack crank, lug wrench and wheel cover removal apparatus Combination hood support for supporting the hood of an automotive vehicle includes a lug wrench and wheel cover/hub cap pry tool portion and a hood support rod portion which may be secured together for use as a jack crank. The apparatus is normally stowed... | 05/01/1990 |
| 4920593 | Combination tool A hand tool of the pliers type has a screwdriver tip at the end of each handle of the pliers with a locking device for locking the pliers in open position to provide a handle for the screwdriver from the other arm of the pliers, while providing a nail pul... | 05/01/1990 |
| 4920594 | Apparatus for lasting toe, side and heel seat portions of a shoe The apparatus comprises a pulling over and toe lasting machine and a side and heel seat lasting machine. The pulling over and toe lasting machine comprises two linear potentiometers (102, 104) for monitoring the movement of the heel rest (26) both lengthw... | 05/01/1990 |
| 4920595 | Solid bridge kit An improved dry bridge kit, composed of individual bridge bays of cross-sectional U-shape and of a cross-sectionally H-shaped traversing beam, the improvement comprising that the bridge bays are composed of a central part and of two side parts, the side p... | 05/01/1990 |
| 4920596 | Vehicle wheel elevating device A two level car wheel elevating device for elevating the front wheel (146) of a car having a bumper assembly (117) and comprising, first (100), second (102), third (104), and a fourth (106) top level wheel tread segments joined together to form a continuo... | 05/01/1990 |
| 4920597 | Drive-on vehicle supporting arrangement A drive-on vehicle supporting arrangement for use with a floor anchor system includes a pair of parallel, spaced vehicle supporting treadways, each of which includes vehicle support stands secured to floor anchors to affix the support stand to the floor a... | 05/01/1990 |
| 4920598 | Dock leveler with automatic vehicle barrier A dock leveler is provided having an automatically actuated barrier for preventing accidental runoff of material handling equipment from a loading dock. The leveler includes a ramp pivotally mounted on the loading dock for selected movement from a stored ... | 05/01/1990 |
| 4920599 | Automatic swimming pool cleaner A suction head for the cleaning of submerged surfaces, in particular the bottoms of swimming pools, comprises a drive mechanism which is driven by a water-driven turbine in turn driven by a stream of water drawn through the suction head by an external suc... | 05/01/1990 |
| 4920600 | Pipe cleaner The device consists of a cleaning assembly (1) and a drive assembly (2). The cleaning assembly is composed exclusively of rigidly mounted and designed cleaning elements (3) forming a ring whose outside diameter increases from front to rear. The drive asse... | 05/01/1990 |
| 4920601 | Strip curtain cleaning device A strip cleaning device having a shaped wire holder in which are removably held a pair of sponges or the like, in a parallel spaced apart relationship. A handle receives the wire holder. Parallel segments of the holder may flex apart from one another for ... | 05/01/1990 |
| 4920602 | Window washer apparatus for a motor vehicle window The washer apparatus for washing the window of a motor vehicle comprises a wiper blade oscillating over the window sitting on a hollow shaft, which is provided with at least one nozzle directed at the window to be washed. A washer fluid feed occurs to the... | 05/01/1990 |
| 4920603 | Industrial-type washing machine An industrial-type washing machine having a washing compartment and a rinsing compartment in immediate longitudinal alignment with each other and having spray jets respectively receiving washing and rinsing solutions from separate reservoirs and applied u... | 05/01/1990 |
| 4920604 | Automatic vacuum bowling lane stripper In accordance with the present invention, an apparatus is provided wherein cleaner is applied to all or a portion of the lane and the cleaner, oil and other residue is picked up by a vacuum head trailing the cleaner applicator in one trip from the foul li... | 05/01/1990 |
| 4920605 | Electric cleaner An electric cleaner for use in households and/or industry, is provided with a control system for running the blower of the motor cleaner at a constant speed in spite of the speed set by a control unit when dust has not been detected by a dust sensor, and ... | 05/01/1990 |
| 4920606 | Electrical power circuit for a vacuum cleaner The present invention is a vacuum cleaner and accessory attachment assembly including a vacuum cleaner and an accessory attachment. The vacuum cleaner includes a motor, a housing enclosing the motor and a fan driven by the motor for producing a vacuum. Th... | 05/01/1990 |
| 4920607 | Arrangement in a vacuum cleaner An arrangement in a vacuum cleaner having an electric motor (15) and a suction fan (14) connected with the motor, the motor being provided with an electronic speed control device (16) making possible the adjustment of the suction power of the vacuum clean... | 05/01/1990 |
| 4920608 | Portable hand held vacuum cleaner A portable hand held vacuum cleaner is disclosed as having a housing with a handle to lift and operate the vacuum cleaner, and a nozzle/debris container releasably locked to the housing. The housing contains a motor driven blower that draws air and debris... | 05/01/1990 |
| 4920609 | Pneumatic door closer A door closer is set forth having a housing, a plunger rod in the housing with a plunger at the inner end of the rod, and a main spring around the rod between the plunger and a housing end for urging the rod into the housing. An actuator carried at the ho... | 05/01/1990 |
| 4920610 | Method for mechanically removing the wings from poultry bodies and apparatus therefor A method for removing wings from poultry bodies and an apparatus for performing the method are described, in which a poultry body held on a conveyor is supplied to a separating mechanism. The latter comprises either two successive separating tools or only... | 05/01/1990 |
| 4920611 | Method and means for encasing meat products A method for encasing a meat product and removing air particles therefrom by forcing a plastic meat emulsion through a stuffing horn having an exit end with an elongated casing slidably mounted in close spaced relationship on the horn so that the meat emu... | 05/01/1990 |
| 4920612 | Fish fillet knife A knife for filleting fish includes a generally flat cutting blade disposed in a first plane and having a proximal end and a distal end. A generally flat boning blade is disposed in a second plane and has a proximal end, a distal end and a cutting edge. T... | 05/01/1990 |
| 4920613 | Flock delivery system The flock delivery system employs a microcomputer with a storage cell for each marker and a storage cell for each stretch of path (containing one or more bale groups) between the markers. The control system is conditional selectively to "permit" or "inhib... | 05/01/1990 |
| 4920614 | Clamping device A clamping device which has clamping units including a pair of openable arms extending in a V-shape toward one side of a pivotal center and in a X-shape toward both sides thereof, and a pair of retainers projecting from the ends of each of the arms a pred... | 05/01/1990 |
| 4920615 | Slide fastener slider with detachable pull tab A slide fastener slider comprises a slider body, a pull tab support pivotally connected at one end to the slider body, and a pull tab removably attached to the opposite end of the pull tab support. The pull tab support comprises a hook portion hooked to d... | 05/01/1990 |
