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 |
| 7065922 | Locking mechanism for a gate A locking mechanism for a stair gate, comprising a displaceable latching member and an operating element which can engage on the latching member, wherein in a non-loaded state the operating element substantially releases the latching member and in a loaded state the... | 06/27/2006 |
| 7044023 | Knob with different gear ratios A knob adjustment device particularly for adjusting the temperature in valve units for water-heating apparatus. The device comprises a geared transmission interposed between the knob and an operating member of the valve unit in order to transmit a rotary movement to... | 05/16/2006 |
| 6028504 | Removable door chime The present invention provides a decorative door chime particularly well suited to festive occasions. The chime includes a speaker which is suspended on one side of the door by a strap, and a door-knocker actuated trigger switch suspended on the other sid... | 02/22/2000 |
| 5914650 | Removable door chime The present invention provides a decorative door chime particularly well suited to festive occasions. The chime includes a speaker which is suspended on one side of the door by a strap, and a door-knocker actuated trigger switch suspended on the other sid... | 06/22/1999 |
| 4800833 | Tubular door lock with a bell A sort of tubular door lock whose inside knob or outside knob can be forced to rotate by each other's rotation and force a rotating unit to turn pushing and overpassing a projection of a knocking spring to get the knocking points at its both ends to knock... | 01/31/1989 |
| 4577584 | Bell lock (II) An improved knob lock commonly used, which comprises a bell inside. The main part of which is a rotator which is turned by rotating either of the knobs and has two extending-out springs to which are attached a steel ball respectively at their ends. Hindra... | 03/25/1986 |
