Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 6264330 | Self-propelled camera dolly A camera positioning system comprising a track having two parallel outer rails and a center rail, a self-propelled camera positioning device comprising a chassis configured to support a camera, wheels coupled to the chassis for riding on the outer rails o... | 07/24/2001 |
| 5609108 | Track wheel kingpin system for a camera dolly A camera dolly has a track wheel system including a kingpin pivotally supported on a dolly chassis. A kingpin tube extends laterally from the kingpin. An axle is pivotally supported within the tube on pins. A track wheel around a bearing is supported on a... | 03/11/1997 |
| 5267514 | Track for material handling car and car wheel assembly for cooperation therewith A material handling car and track assembly, the assembly comprising a track having a pair of opposed U-shaped rails, and a car having a chassis with four wheel assemblies mounted on the chassis, each of the wheel assemblies comprising a first generally ve... | 12/07/1993 |
| 5024163 | Derailment resisting, tractive power railway system There is provided a multi-rail vehicle system, which can be used to improve the efficiency of existing systems and to reduce risk of derailments. The systems comprises a vehicle designed to ride upon a pair of conventional outer rails and an additional lo... | 06/18/1991 |
| 4984737 | Mobile shelving apparatus Mobile shelving apparatus comprises rails that are leveled by stacks of interlocking shims. The shims are placed under and interlock with rail support brackets at the joints in the rails. Rail spreaders used to align the rails are also leveled with and in... | 01/15/1991 |
| 4589345 | Wheeled carriage A wheeled carriage is capable of moving on rails to-and-fro, and of moving on a railless flat floor in any desired direction. The carriage has at least three pivotable wheel units. Each of these units consists of a first wheel and a second wheel. The firs... | 05/20/1986 |
| 4494464 | Castor wheel carriage A wheeled carriage is proposed which is capable of moving on rails to-and-fro, and of moving on a railless flat floor in any desired direction. The carriage has at least three pivotable wheel units. Each of these units consists of a first wheel and a seco... | 01/22/1985 |
| 4398469 | Laterally compensating radial trolleys A rail-supported carriage, adapted to be moved along a pair of rails spaced from one another at a predetermined distance includes at least three wheel assemblies, each including a frame; at least one wheel assembly is adapted to travel on one rail, and th... | 08/16/1983 |
| 4389943 | Transfer truck A driverless transfer truck includes a chassis having two bogies for riding on rails. Each bogie is provided with at least one drive wheel which is pressed against a drive shaft so that the force for propelling the truck is produced by the friction engage... | 06/28/1983 |
| 4351541 | Vehicle towing system A system for towing a plurality of wheeled load-carrying vehicles in a train in which coacting tongue and pin members are provided on the vehicles. Each vehicle has a body having a front end and a back end, a pair of fixed position wheels secured to the u... | 09/28/1982 |
| 4285280 | Radial railway truck A short wheelbase railroad truck having two axles intended to assume a radial configuration when the railroad vehicle rounds curves comprises a frame having two side members and axles mounted in bearing means. The bearing means are pivotally attached to t... | 08/25/1981 |
