...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7360420 | Method and bearing for balancing rotors without journals In order to be able to determine the imbalance of rotors (2) with pocket hole bores with great precision in a bearing arrangement with a bearing mandrel (5) for holding a rotor (2), without journals but having a bore (6), in a balancing d... | 04/22/2008 |
| 7311003 | Method and device for balancing journal-less rotors In the case of a bearing with a bearing mandrel for mounting a journal-less rotor with a bore hole in a balancing device, in which the bearing mandrel has openings for fluid to pass through, to be able to determine the imbalance of rotors with bearing possibilities ... | 12/25/2007 |
| 7231822 | Machine and method for balancing a member during rotation A machine for balancing a rotating member includes hard bearing balancing apparatus for determining the magnitude and circumaxial location of imbalance. A sensor responds to the position of the rotating member. A computer receives signals from the balancing apparatu... | 06/19/2007 |
| 6666087 | Unbalanced force sensing apparatus An unbalanced force sensing apparatus for sensing an unbalanced force produced due to rotation of a cylindrical rotor, the apparatus including a shaft having gas passageways to convey a first gas against the inner surface of the rotor to support the rotor... | 12/23/2003 |
| 6374682 | Force-measuring apparatus, particularly a weighing cell I A force-measuring apparatus has a stationary part, a load receiver, and two parallel guides connected to the load receiver and attachment areas of the stationary part. The load receiver is restrained by the guides to move parallel to the stationary part. ... | 04/23/2002 |
| 5067349 | Method and apparatus for balancing rotating components A method and apparatus for dynamically balancing a rotating component, such as a compressor wheel, without using an arbor is disclosed. A balancing fixture includes a nest for receiving the compressor wheel and is defined by a balancing surface on the bal... | 11/26/1991 |
| 4976147 | Device for measuring dynamic balance of a rotor A device for measuring dynamic balance of a rotor including a shaft to which an impeller is secured at its one end and which has a neck portion adjacent to the impeller so that the shaft may be rotatably supported by a bearing member at the neck portion. ... | 12/11/1990 |
| 4930348 | Vertical balancing machine with cartridge assembly A vertical, hard suspension, two plane balancing machine has a suspension cartridge which drops into an aperture in a support plate of the machine base, and a spindle cartridge which slides snugly into bores in the suspension cartridge. The suspension car... | 06/05/1990 |
| 4543825 | Procedure for balancing of rotors without journals A procedure is described for the balancing of rotors without journals, as well as an auxiliary bearing arrangement used to accomplish the balancing of such rotors. Fluids function to separate the rotor being balanced from the journal exterior of the beari... | 10/01/1985 |
| 4250756 | Apparatus for balancing a rotating body This invention relates to a process and an apparatus for balancing a body of rotation in two parallel balancing planes disposed perpendicular to the rotational axis of the body. A slotted plate disposed substantially perpendicular to axis of rotation of t... | 02/17/1981 |