Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 4399682 | Method for cold forming metal articles having diverging members A method for cold forming a metallic billet into an article having divergent members with a single hit comprises depositing the billet centrally within a die cavity between a first member and a second member. The first and second members are hydraulically... | 08/23/1983 |
| 4348774 | Weight lifter's belt A weight lifter's belt fabricated from leather which is lined with a thin layer of foamed flexible plastic having a Shore A Durometer hardness of between about 10 and 25, the liner being attached to the inner surface of the belt by a flexible adhesive. Th... | 09/14/1982 |
| 4341106 | Apparatus for controlling the movement of a reciprocatory hydraulically driven element of a metal forming machine A method and apparatus are provided for controlling the movement of a reciprocatory hydraulically driven element of a metal forming machine between extended and retracted positions. Two piston members, having different sized working areas are slidably mou... | 07/27/1982 |
| 4338056 | System for loading and unloading a kiln A system is provided for loading concrete blocks, carried on pallets, into a kiln. The kiln includes a front end wall and a rear end wall and a plurality of guideways extending from the front end wall to the rear end wall. The guideways are arranged in a ... | 07/06/1982 |
| 4337578 | Measuring device A device for measuring lengths of yarn and the like has an elongated base member with a first fixed position post and a second movable post. The second post is moved toward and away from the first post to a preselected position for measuring lengths of ya... | 07/06/1982 |
| 4332561 | Dental file A dental file is disclosed which is particularly useful in endodontia for removing dead or damaged tissue from a curved tooth root canal. The file has a flexible tapered shank which has a cutting surface on its periphery and a pilot projecting from the ta... | 06/01/1982 |
| 4332004 | Lighting system for use on a welder helmet A lighting system for a welders helmet which includes a high intensity, high Kelvin temperature electric light source attached to the face shield for directing a high energy, high Kelvin temperature light beam forwardly of the viewing port, and an energiz... | 05/25/1982 |
| 4327843 | Cup dispensing mechanism A dispensing mechanism for singularly removing a cup from the bottom of a vertically nested stack of cups in a hopper is described. This mechanism, designed principally for beverage vending machines, has a pair of coacting jaws which each contact nearly o... | 05/04/1982 |
| 4327398 | Cooling system for automatic bowling pin spotter A cooling system for the electrical components compartment of an automatic bowling pin spotter having a low power subcompartment and a high power subcompartment, includes an upwardly projecting chimney structure which supports a fan. The fan forces air fl... | 04/27/1982 |
| 4323449 | Method and apparatus for beneficiating coal A method and apparatus for beneficiating a mixture of coal and a denser material are provided. The coal and ash mixture and a liquid medium are deposited into a rotating, sloping barrel having internal spiral flights and foraminous end sections. Coal and ... | 04/06/1982 |
| 4323164 | Locking system for a train car coupler A locking system for a railway car coupler includes a gravity lock member which defines a slot and a locklifter which includes a trunnion extending through the slot, terminating at a distal end. A flange is secured to the trunnion at the distal end. The f... | 04/06/1982 |
| 4318260 | Strap system for supporting insulation in buildings A strap system for securing insulation batts in position relative to depending purlins of a building. The strap system includes first and second strap members each having keyhole-type slots in respective ends thereof and button means for fastening the str... | 03/09/1982 |
| 4311175 | Log cutter Apparatus for reducing a log to chips comprising a rotatable cutter head adapted for translational movement relative to a log, and carrying a cutting element, such element comprising a length of open-ended tubular or segment there of material having a lea... | 01/19/1982 |
| 4302185 | Liquid control system A system for concurrently supplying a liquid and drive gas to a gas-driven tool includes a drive gas source and conduit means connecting the drive gas source to the tool. Exhaust conduit means connect the tool to exhaust sensor means. A liquid source is c... | 11/24/1981 |
| 4300253 | Quick assembly blind for boats A quick assembly blind for use in combination with an open top boat. The blind comprises generally a rectangular framework releasably secured to the boat and extending above the boat. Drapable curtains depend from the framework to close the blind. A porti... | 11/17/1981 |
| 4299571 | Dental file Disclosed is a dental file for use in cleaning out or extirpating root canals, particularly those which are curved, wherein the file which conventionally is provided with cutting or abrading flutes, typically in a spiraled manner, is also provided with a ... | 11/10/1981 |
| 4295544 | Platform stepladder A stepladder comprises a pair of front legs pivotally attached to a forward platform and a pair of rear legs pivotally attached to a rear platform. The front platform and rear platform are hingedly attached to one another for movement between a coplanar p... | 10/20/1981 |
| 4294885 | Surface-modified pigment of natural kaolin material and a process of producing same A surface modified pigment formed from kaolin material and a process of producing same are described. The pigment consists of pigment particles of kaolin material, and on the surface of the particles a primary and a secondary layer are precipitated. The p... | 10/13/1981 |
| 4293612 | Needle-punch carpet with binder containing alkali-stabilized silicic acid The invention relates to a method for the production of needle-punch carpets with improved properties, in which method use is made, in the chemical bonding of the needle-felt, of alkali-stabilized silicic acid sol in combination with a latex of an organic... | 10/06/1981 |
| 4291679 | Structural solar collector The upper surface of the building, e.g., roof or portion of the roof, is constructed in the form of a hyperbolic paraboloid having a concave surface directed in a specified, for example, southerly, direction. This concave surface is covered with a reflect... | 09/29/1981 |
| 4290695 | Method and apparatus for measurement of transmittance and scatter of light in water Precise quantification of turbidity is obtainable through multiple determinations of the light attenuation coefficient of the particulate-bearing medium at a plurality of path lengths in the attenuating medium, and through multiple determinations of the s... | 09/22/1981 |
| 4290250 | Method and apparatus for insulating buildings A method and apparatus for applying a layer of flexible insulative material to the interior surface of a wall from which a plurality of shaft members extend inwardly. A flexible insulating material is applied to the interior surface and a plurality of the... | 09/22/1981 |
| 4287971 | Body-attachable bag for transporting articles A body attachable bag for suspension from a person's shoulder, constructed of a plurality of panels that individually are substantially non-selfsupporting but which collectively interact with one another to develop and maintain a geometry of the bag that ... | 09/08/1981 |
| 4287875 | Damper system A damper system is provided for a fireplace which communicates with a room through a front opening and which includes an upper opening and a sleeve extending from the front opening to the upper opening to direct fluid flow to the upper opening. The damper... | 09/08/1981 |
| 4286697 | Body-attachable bag for carrying cameras or the like A shoulder suspended semi-flexible bag configured to conform to and substantially wrap the torso of a carrier, comprising flexible crease resistant panel means secured to the sides of the bag, reinforcing support thereto, such panel means being capable of... | 09/01/1981 |
| 4280425 | Method and apparatus for electro-pneumatic control of a stitching machine Method and apparatus for electro-pneumatic control of a stitching machine, operable either in the automatic or semiautomatic mode. Following initiation of a stitching operation through actuation of the present control system, the system internally of itse... | 07/28/1981 |
| 4263866 | Ski boat An elongated ski boat is provided for producing a relatively small, well-defined wake and a relatively smooth working table. The boat comprises an elongated hull which includes a bow, a stern, a port side, a starboard side and a transom. The hull comprise... | 04/28/1981 |
| 4253664 | Tennis serve training device A tennis serve training device is provided which includes an elongated rigid handle adapted to being gripped as a tennis racquet is gripped. The handle includes a first end and a second end portion. A pair of elongated flexible pouches are secured directl... | 03/03/1981 |
| 4244904 | Method and apparatus for curing masonry units Masonry units are cured in a kiln having a gaseous atmosphere including water vapor. A portion of this atmosphere is withdrawn and mixed with a flowing stream of heated water. This mixture is injected into a body of water disposed within the kiln at a plu... | 01/13/1981 |
| 4228728 | Method and apparatus for removing gussets from flat tubes A method and apparatus for removing longitudinal gussets from a flat tube of flexible material, such as paper, including a conveyor for conveying the flat tube along a guide path to a gusset removal station having means operative to separate opposite side... | 10/21/1980 |
| 4218993 | Method and apparatus for accomplishing flame ignition for an internal combustion engine A flaming engine system for an internal combustion engine of the Otto-cycle type comprises primary and secondary pre-ignition chambers serially interposed between an engine cylinder and a spark plug, and self-actuated of means metering high combustible fu... | 08/26/1980 |
