Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7182039 | Striker mechanism for bell unit A striker mechanism 21 which clangs a bell 21 is made up of a support member 31 which projects radially outward of the bell, a striker 41 pivotably mounted on the support member so as to be rockable in a direction toward and away from the... | 02/27/2007 |
| 6450115 | Bicycle bell with inverted dome A bicycle bell with an inverted bell dome and a substantially enclosing cover. Preferably, the cover also functions to activate the bell. Alternatively, a lever actuator can be used, either in combination with the cap or as a separate element. The cover s... | 09/17/2002 |
| 6374767 | Rotating warning bell A railroad car-warning bell is centrally mounted on the hub of a wheel. Three opposed cylinder housings each contain a reciprocating ball which hits an end hammer to sound the bell when the wheel turns slowly up to speeds of nominally 15 mph. At higher sp... | 04/23/2002 |
| 5986541 | Motor driven bell A motor driven bell for producing a sound of a bell in a manner that a hammer member hits a gong through the use of a driving force of a motor. The motor driven bell comprises a supporting shaft A1 born on a front side between a pair of opposed frames, a ... | 11/16/1999 |
| 4912453 | Electromagnetic bell unit, its fitting structure and a method of welding the bell and the yoke of the unit A miniaturized electromagnetic bell unit suitable for use with an alarm clock and the like is provided. The bell unit of the present invention is characterized in that it is miniaturized in such a way that a yoke to which a coil and a bell hammer are atta... | 03/27/1990 |
| 4646064 | Volume control device for ringer A volume control device suitable for installation on the ringer of a telephone incorporates a tone control lever having a damping element cantilevered therefrom and extending as a wing from a point of pivoting in a direction generally parallel to a frame ... | 02/24/1987 |
| 4503800 | Heat responsive alarm device A metallic bell-type alarm device for indicating the need for refueling or otherwise adjusting the heat generated within a wood stove or the like. The device is mounted on or adjacent to a stove at a location where it can respond to heat fluctuations in t... | 03/12/1985 |
| 4329680 | Double gong bell A double gong bell has an outer gong and an inner gong separately arranged to accommodate the inner gong within the space defined by the inner surface of the outer gong. In one embodiment at least two hammer driving members, disposed within the space defi... | 05/11/1982 |
| 4320687 | Cymbal An elliptical cymbal or gong. The cymbal structure has a platelike configuration bounded by a continuous edge defining opposite elliptical areal surfaces about its periphery. The foci of the boundary ellipse are visually indicated at the outer surface of ... | 03/23/1982 |
| 4269136 | Burglar alarm A gong or bell attached to a door such that when a thief breaks open the door, a ball or like object having a rod extending therethrough and resting on a ledge which projects from the top of a frame for the door, falls along the rod as the ball or like ob... | 05/26/1981 |
| 4203383 | Burglar alarm A gong or bell attached to a door such that when a thief breaks open the door, a ball or like object having a rod extending therethrough and resting on a ledge which projects from the top of a frame for the door, falls along the rod as the ball or like ob... | 05/20/1980 |
| 4183018 | Motor driven type gong striking mechanism In a motor driven type gong striking mechanism, the rotation of the main shaft of an electric motor is converted through a crank mechanism into the oscillation of a piston plate, a gong striking hammer is coupled through a spring to the piston plate so th... | 01/08/1980 |
