Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7377714 | Mechanical joint for collapsible structures A mechanical joint is formed from a hollow structure of material that can be shaped so that bringing opposite sides of the external walls forming the hollow together forms a socket. For example, by compressing together opposite external sides of a hollow structure, ... | 05/27/2008 |
| 7186049 | Pin to thin plate joint and method for making the joint A pin to plate joint and method of making the joint comprising a plate comprising an entry side and an exit side with the plate defining cutouts, and the pin movable through the plate from the entry side to the exit side and in doing so pushes tab members at angles ... | 03/06/2007 |
| 7128494 | Method and apparatus for securing a caster wheel An integrally formed caster socket is provided in a tubular framing member for a merchandising display or the like. The framing member has aligned stem receiving holes with the upper hole being on an outwardly domed frusto-conical shaped area and the lower hole is o... | 10/31/2006 |
| 6099195 | Connection of a spindle and/or stud with a crank lever of a wiper system Fastening of a spindle or of another elongated cylindrical component perpendicularly to a lever. This fastening essentially consists in providing the galvanized deep-drawn sheet steel lever with a suitable rim hole into which the spindle is inserted. The ... | 08/08/2000 |
| 5597259 | Plate assembly The present invention provides an assembly of a first panel formed with at least one insertion notch extending inwardly from at least one panel edge and a second panel carrying at least one projecting tab extending outwardly of at least one of its edge an... | 01/28/1997 |
| 5595454 | Panel assembly The present invention provides an assembly of a first panel formed with at least one insertion slot and a second panel carrying at least one projecting tab extending outwardly of at least one of its edges and fitting in the slot. The tab has on at least o... | 01/21/1997 |
| 5517744 | Press-fit tube-connection system A method is provided for connecting a spindle to a tube. The method includes the step of punching a hole in an exterior wall of a tube to create a perimeter edge bordering the tube. The perimeter has a first pre-determined shape. The method further includ... | 05/21/1996 |
| 5165207 | Apparatus and method for forming a space frame structure Structural components for forming a space frame, particularly a geodesic dome structure, as well as a method of assembling the structural components is described in this invention. The structural components feature a connector having a slotted tubular mem... | 11/24/1992 |
| 4832674 | Pulley and press-fit pulley structure A pulley adapted to be press-fit on a driving shaft has projections having vertex portions with flat surfaces formed on an inner peripheral surface which is defined by a center hole of the pulley. The flat surfaces of the projections make pressing contact... | 05/23/1989 |
| 4783187 | Bicycle handlebar stem assembly A bicycle handlebar stem assembly for securing a handlebar of a bicycle to a bicycle frame. The stem comprises a top plate, a bottom plate, a barrel and threaded nuts and bolts for securing the bottom plate to the underside of the top plate. The plates ha... | 11/08/1988 |
| 4448321 | Fastening system A fastening system (10) for fixedly securing a first member (12) and a second member (14) of a container (16). The first member (12) is generally planar in contour and the second member (14) includes a fastening portion (30) defining a dome configuration ... | 05/15/1984 |
| 4079563 | Ceiling runner locking means The invention is directed to a ceiling runner which has a generally U-shaped configuration. The runner has flanges to support ceiling boards. The side walls of the runner are formed with grooves which may be used to support the runner in position or defin... | 03/21/1978 |
| 4079564 | Sub-modular cross-tee attachment The invention is directed to a ceiling runner which has a generally U-shaped configuration and a means for attaching a cross tee thereto. The runner has flanges to support ceiling boards. The side walls of the runner are formed with grooves which may be u... | 03/21/1978 |
| 4074377 | Bed canopy frame A bed canopy frame having longitudinal members constructed of resilient plastic material. The longitudinal members include parallel top and bottom portions with a transverse portion joining the top and bottom portions. The transverse portion of each of th... | 02/21/1978 |
| 4047703 | Line rail construction A rattle-free rail construction includes a plurality of vertical line posts, each having an H cross-sectional configuration defining vertical channels in the post. Each channel includes a pair of opposed, vertically extending arcuate grooves which are of ... | 09/13/1977 |
| 4011707 | Cross tee end joint for suspended ceiling system An end detail is provided for a cross tee to provide positive engagement of the cross tee with the main runner of a suspended ceiling system. The end detail of the cross tee may be provided with means which will positively lock the tee in place to bracket... | 03/15/1977 |
| 3958386 | Building structural system A building structural system having a plurality of preformed elongate structural elements each with a plurality of angularly-related planar surfaces and provided with integral fastener-receiving and locking devices and a plurality of connecting members fo... | 05/25/1976 |
