Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7247633 | Pyrimidine compounds and their use A compound of the general formula (I): wherein R1, R2, X, Y and Z are as described in the specification. ... | 07/24/2007 |
| 7055705 | Central buffer coupling A central buffer coupling for coupling a first rail car body with a second, adjacent rail car body of a multiple-unit rail vehicle, has a coupling head pivotally connected by a coupling shaft to a linking housing of the rail car body, and a pivoting unit pivoting th... | 06/06/2006 |
| 6938786 | Slackless drawbar assembly using an improved ball and race connection assembly An improved ball and race connection assembly for use in connecting together adjacently disposed ends of railway vehicles is provided. This ball and race connection assembly is particularly useful as a connection member in slackless type drawbar assemblies. The impr... | 09/06/2005 |
| 6237785 | Retainer member for use in railway coupling devices A retainer member for use in either an articulated coupling arrangement and/or a slackless drawbar arrangement for retaining a spherical member in an operating position within a male connection member for connecting together adjacently disposed ends of a ... | 05/29/2001 |
| 5967349 | Spring tab shim support in rotary shank coupler A coupler is provided for a railroad rotary dump car. The coupler comprises a coupler housing, a coupler head, a buff loading shim, and as most preferred, a plurality of spring tabs, and spring tab fasteners. The coupler housing defines a coupler cavity w... | 10/19/1999 |
| 5702012 | Rotary drawbar assembly for a railway freight car A rotary type slackless drawbar assembly for connecting one end of a first railway freight car to an adjacently disposed end of a second railway freight car in a substantially semi-permanent fashion. Such drawbar assembly includes a rear block member havi... | 12/30/1997 |
| 5544767 | Freight railway car slackless drawbar assembly A slackless drawbar assembly connecting adjacent ends of a pair of freight cars together includes a pair of rear draft stop members and a pair of front draft stop members engageable with and securable to a pair of side wall portions of a center sill membe... | 08/13/1996 |
| 5472104 | Central buffer coupling for rail-borne vehicles pivotable between an operative and inoperative position The present invention pertains to a central buffer coupling for rail-borne vehicles with a two-part coupling shaft formed by a front shaft part (2) carrying the coupling shaft (1) and by a rear shaft part (3) hinged horizontally pivotably to the chassis o... | 12/05/1995 |
| 5462179 | Slackless drawbar assembly using a ball and race assembly at each end of the drawbar Slackless drawbar includes female member, having a cavity, engaging end of a railway car. Openings through first and second side walls of cavity. A male member has portion movably disposed in cavity. An aperture formed through such male member. A ball has... | 10/31/1995 |
| 5131331 | Articulated coupling apparatus for connecting adjacent ends of a pair of railway cars The present invention provides an articulated coupling apparatus which connects one end of one railway car to an adjacent end of a second railway car in a semipermanent manner. Such coupling apparatus includes a male connection member, a female connection... | 07/21/1992 |
| 5000330 | Railway vehicle rotary drawbar arrangement A railway vehicle drawbar slackless rotary dump arrangement having one end fixed against rotation to one railway vehicle and the other end connected to be rotatable in a second adjoining railway vehicle. Slack elimination is provided by a wedge at each co... | 03/19/1991 |
| 4794867 | Omnibus suitable for train formation The invention relates to an omnibus which is suitable for train formation, can be driven independently and can either be freely steered or guided on tracks. In order not to disfigure the omnibus front by protruding coupling devices, and to be able to carr... | 01/03/1989 |
| 4289247 | Arrangement for arresting and releasing an intermediate buffer coupling An arrangement for horizontal central arresting and releasing of an intermediate buffer coupling has a horizontally swingable coupling rod, a guide member at a rear end of the coupling rod and following the swinging of the latter, two rocking levers pivot... | 09/15/1981 |
| 4049129 | Automatic coupling for streetcars and the like An automatic coupling for streetcars and like vehicles comprises a connecting rod pivotally connected to the vehicle and a coupling head pivotally connected to the connecting rod. The coupling head is pivotally disposed in the horizontal plane between an ... | 09/20/1977 |
