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 |
| 6955747 | Cam driven paddle assembly for a plating cell The present invention overcomes the drawbacks and limitations described above by providing a paddle assembly having a paddle that moves in a bidirectional fashion for agitating solution in a container of a plating cell. A follower is coupled to the paddle. The follo... | 10/18/2005 |
| 6848338 | High acceleration spindle drive and method of using same An apparatus for moving a spindle along a longitudinal axis, the apparatus includes a spindle; a drive member for moving said spindle over a range of travel along said longitudinal axis in a first direction; a spring for applying a first force in combination with a ... | 02/01/2005 |
| 5676024 | Cam device A cam device includes an armlike cam follower for moving a lift unit upward and downward, and a plate cam having a cam contour face in contact with the cam follower. The cam is formed in a side surface thereof with a recessed portion having an inwardly fa... | 10/14/1997 |
| 5341702 | Apparatus for calibration of an angular displacement A system for calibrating a rotary table (10) includes an indexing table (20) (which is a Hirth coupling table) and an angular interferometer (100), together with a control (200). The indexing table is mechanically coupled to the rotary table (this being t... | 08/30/1994 |
| 5031478 | Two gear, connecting arm and crank apparatus Rotation and linear movement of a main gear is provided by a pinion gear rotatably mounted on a crank arm and in meshing engagement with the main gear. A connecting arm between the gear centers keeps the gears in meshing engagement. The pinion gear may ha... | 07/16/1991 |
| 4836040 | Differential rotary-to-rotary cam system to achieve long dwell periods with continuous rotary input A differential rotary-to-rotary cam system to achieve long dwell periods with continuous rotary input including a rotary prime mover of several different types and a differential cam assembly which can be interposed between a particular power input and a ... | 06/06/1989 |
| 4452103 | Twin cam index drive An improved dual cam indexing drive assembly (10) is disclosed which is well suited for use in driving various types of rotational, linear, and/or reciprocating work transfer apparatus (12). The drive system (10) utilizes primary and secondary rotatable c... | 06/05/1984 |
| 4448093 | Stepping drive mechanism Stepping drive mechanism for converting a constant input rotatory movement to a linear movement of a given length accelerated first from zero, then continuing at constant velocity, and finally decelerated back to zero, in which the constant input rotatory... | 05/15/1984 |
| 4380180 | Energy storage for indexing mechanism The kinetic energy of an intermittently movable work member is converted, independently of its main drive motor, to potential energy during deceleration of the work member as it approaches each of its dwell positions. During the initial portion of the nex... | 04/19/1983 |
| 4377953 | Indexing apparatus An indexing apparatus (10) is disclosed which is designed for use with various types of work transfer equipment and is operative to provide smooth rapid jerk-free acceleration and deceleration whereby workpieces may be smoothly and rapidly transferred bet... | 03/29/1983 |
| 4301696 | Method and an arrangement for the compensation of inertia forces in the indexing movement of a machine element When machine elements having a large mass are indexed, i.e. subjected to short, quick rotating movements, very great acceleration and deceleration forces must be transmitted via the driving means of the machine. Due to vibrations occurring, increasing the... | 11/24/1981 |
| 4271727 | Apparatus for cycloidal acceleration and deceleration with partial constant velocity A reversible rotary indexing mechanism capable of generating large indexing angles including those exceeding one revolution. A constant velocity rotary input is connected to a rotary output by an eccentric accelerating-decelerating drive means which, by r... | 06/09/1981 |
| 4262563 | Turret indexing assembly for machine tools A turret index assembly has an air piston connected to a pawl to provide a cushioned stop therefor after its engagement with one of the teeth of a machine tool turret index plate.... | 04/21/1981 |
| 4202221 | Indexing apparatus Indexing apparatus is disclosed whereby a constantly rotating drive shaft can intermittently drive apparatus driven thereby. An arm carried by the drive shaft pivotally carries a second arm which has means for engaging a cammed surface whereby the pivoted... | 05/13/1980 |
| 4189963 | Index apparatus for rotary table An index apparatus for indexing a rotary table rotatably and vertically slidably received within a base, comprises a pair of coupling members secured to the rotary table and the base, respectively, and engageable with each other. The rotary table is lifte... | 02/26/1980 |
