Code transmitter having intermittent drive mechanism |
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| 申请号 | US3675237D | 申请日 | 1970-03-02 | 公开(公告)号 | US3675237A | 公开(公告)日 | 1972-07-04 |
| 申请人 | MC GRAW EDISON CO; | 发明人 | WEINFURT WILLIAM J; | ||||
| 摘要 | An intermittent drive mechanism for an encoding device is driven by a continuously rotating drive source. First and second Geneva drive discs are each rotated through a sequence of rotated rapid incremental displacements to a plurality of positions each of which are utilized for providing coded information. The first Geneva drive disc is rotated by a drive means which is moved to a high energy level condition by the drive source and permitted to rapidly discharge. A second drive means is connected to the first disc and is moved to a high energy level condition by rotation of the first disc and permitted to discharge to rapidly drive the second disc. | ||||||
| 权利要求 | 1. In an encoding device, the combination of first drive means including a first rotatable gear wheel having a first plurality of code units arranged thereon and having gear teeth formed therein in the shape of a Geneva drive contour, said first drive means also including a drive member engaging the teeth of said first gear wheel and rotatably driving the latter, second drive means rotatable with said first gear wheel, and driven means including a second gear wheel having a second plurality of code units arranged thereon and having gear teeth formed therein in the shape of a Geneva drive contour, said second drive means engaging the teeth of said second gear wheel and driving the second gear wheel. 2. In an encoding device, the combination of first drive means including a drive shaft and a first rotatable gear wheel having a first plurality of code units arranged thereon, second drive means rotatable with said first gear wheel, and driven means including a second gear wheel freely mounted on said drive shaft and having teeth formed therein and a second plurality of code units arranged thereon, said second drive means engaging said teeth driving the second gear wheel. 3. In a drive mechanism, the combination comprising, first drive means including a first rotatable drive shaft, a first gear wheel rotatable through a plurality of distinct positions by said first drive means, second drive means coupled to and rotatable with said first gear wheel, a second gear wheel rotatable by said second drive means through a plurality of distinct positions and being freely mounted on said drive shaft, first code means having a first plurality of code units on said first gear wheel, one of said code units being provided for each position of the first gear wheel, second code means positioned opposite said first gear wheel for operative association with said first plurality of code units, third code means comprising a second plurality of code units on said second gear wheel, one of said second plurality of code units being provided for each position of the second gear wheel, and fourth code means positioned opposite said second gear wheel for operative association with second plurality of code units. 4. The combination according to claim 3 wherein said first and second gear wheels each have a Geneva drive gear contour, said first drive means including a first drive member engaging the gear contour of said first gear wheel and rotating the latter to each of its distinct positions, said second drive means including a second drive member engaging the gear contour of the second gear wheel and rotating the latter to each of its distinct positions. 5. The combination according to claim 3 wherein each of said gear wheels has a side, and further comprising a space defined by two planes each aligned with a different one of said sides, said sides facing toward said space, and said second and fourth code means being positioned in said space. 6. The combination according to claim 5 further comprising support means including a first wall positioned in said space and separating said second and fourth code means, a second wall, said second gear wheel has opposed sides and is positioned between said first and second walls, said walls supporting said drive shaft, and each of said walls has a projection extending into engagement with one of the sides of the second gear wheel whereby the second gear wheel is maintained at a predetermined axial position on said shaft. 7. In an encoding device, the combination comprising a gear wheel having a plurality of code units arranged thereon and being rotatable in a predetermined circumferential direction, code means responsive to the position of said plurality of code units to indicate the position of said gear wheel, drive means movable along a path including a first portion in engagement with and substantially along the circumference of the gear wheel to rotate the gear wheel in said predetermined direction, actuating means engaging said drive means and being movable between a high energy level condition and a low energy level condition, said actuating means being effective while moving from said high energy level condition to said low energy level condition to rapidly advance the drive means along the first portion of said path whereby said gear wheel is rapidly rotated, said drive means being movable along a second portion of said path in a direction opposite to said predetermined direction to return the actuating means from said low energy level condition to said high energy level condition. 8. The combination according to claim 7 wherein said gear wheel is stationary while the drive means moves along the second portion of said path and said drive means includes a holding segment engaging and maintaining said gear wheel stationary during movement of the drive means along said second portion of said path. 9. The combination according to claim 8 wherein said gear wheel has a Geneva drive contour comprising a series of alternating notches and concave portions, said drive means engaging one of said notches during rotation of the gear wheel and said holding segment engaging one of said concave portions while said gear wheel is stationary. 10. The combination according to claim 7 wherein said actuating means comprises resilient means and said gear wheel is in a biased condition in response to said resilient means during movement of the drive means along the first portion of said path and in an unbiased condition during movement of the drive means along the second portion of said path. 11. The combination according to claim 7 wherein said actuating means comprises weight means and said gear wheel is in a biased condition in response to said resilient means during movement of the drive means along the first portion of said path and in an unbiased condition during movement of the drive means along the second portion of said path. 12. The combination according to claim 7 wherein said drive means includes a rotatable shaft, a first lever member rigidly affixed to said shaft, a second lever member freely mounted for rotation on said shaft, said second lever member being in engagement with and rotated by the actuating means in said predetermined direction, said second lever member being in engagement with and rotated by the first lever member in said opposite direction. 13. The combination according to claim 12 wherein said actuating means comprises resilient means held by the second lever while the latter is rotated in said opposite direction whereby the resilient means is placed in said high energy level condition. 14. In an encoding device having code means, the combination comprising, a drive shaft, a support having two opposed sides supporting said drive shaft and a gear wheel having a plurality of code units arranged thereon for cooperation with said code means, said gear wheel also having two opposed sides and being freely mounted on said shaft between said opposed support sides, each of said support sides having a projection including an elongated surface in engagement with a side of the gear wheel whereby said gear wheel is maintained at a predetermined axial position on said shaft. 15. In an encoding device having code means and a drive mechanism, the combination comprising, a support, a shaft rotatably mounted on said support, drive means for rotating said shaft including a gear wheel having a first plurality of code units arranged thereon for cooperation with said code means, said gear wheel being mounted on said shaft in axially movable relationship to the shaft, and a crank member connecting said gear wheel and shaft, said crank member holding said gear wheel in a circumferentially fixed relationship to said shaft. |
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