Positive clutch and brake with limit switch |
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| 申请号 | US3744603D | 申请日 | 1971-06-15 | 公开(公告)号 | US3744603A | 公开(公告)日 | 1973-07-10 |
| 申请人 | INST FRANCAIS DU PETROLE; | 发明人 | GARNIER J; | ||||
| 摘要 | Device for stopping a moveable member at a position defined with accuracy with respect to an adjacent stationary element carrying a stopping member, comprising the combination of recess means in said stationary element and in an intermediary element driving in motion said moveable member through connection means and clenching means cooperating with said recess means so as to interlock said connecting means and said intermediary element until the recess means thereof registers with the recess means of said stationary element and to interlock said stationary element with said connecting means while disconnecting the latter from said intermediary element, at the time when said recess means register, thereby resulting in the stopping of said connection means at an accurately defined position, and in the corresponding stopping of the moveable member driven in motion therewith. | ||||||
| 权利要求 | 1. A device for stopping a driven member at an accurately defined position comprising: a driving member, a driven member, a stationary member, and connection means for selectively connecting said driven member to one of said driving member and said stationary member, said driving member having a first recess formed therein, said stationary member having a second recess formed therein, said driving member and said stationary member being spaced from one another in a direction perpendicular to the direction of displacement of said driven member to form a guide path for said connection means, said guide path having substantially the same width as said first and second recesses, said connection means including a plurality of arms articulated about a pivot carried by said driven member, each of said arms having a roller at the outer end thereof, a first of said rollers being engaged with a slight play in said first recess to drivingly connect said driving and driven members during displacement of said driven member, a second of said rollers being maintained in said guide path during displacement of said driven member until said first and second recesses are removed close to one another to a position where said second roller becomes engaged with said second recess to lock said driven member to said stationary member while said first roller simultaneously disengages from said first recess upon pivoting of said arms about said pivot, whereby said driven member is automatically engaged with said driving member for predetermined displacement and is automatically disengaged from said driven member and locked to said stationary member after said predetermined displacement. 2. A device according to claim 1, wherein clenching means are provided on said stationary member for automatically effecting the pivoting of said arms when said second roller becomes aligned with said second recess. 3. A device according to claim 1, wherein said connection means includes three arms with rollers at the ends thereof, a third one of said rollers being positioned in said guide path at all times during operation of the device. 4. A device according to claim 3, wherein said first roller is in said guide path when said second roller is completely engaged in said second recess. 5. A device according to claim 1, wherein said driven member is rotatably drivable and wherein said guide path is annularly shaped and extends at the outer circumference of a portion of said driven member. 6. A device according to claim 2, wherein said driven member is rotatably drivable and wherein said guide path is annularly shaped and extends at the outer circumference of a portion of said driven member. 7. A device according to claim 3, wherein said driven member is rotatably drivable and wherein said guide path is annularly shaped and extends at the outer circumference of a portion of said driven member. 8. A device according to claim 1, wherein said pivot is displaceable with a slight play in a slot provided in said driven member in a direction perpendicular to the direction of displacement of said driven member. 9. A device according to claim 2, wherein said clenching means consist of abutments provided on said first stationary element. 10. A device according to Claim 2, wherein said clenching means consists of repelling resilient members respectively placed at the bottom of said second recess and at the bottom of said first recess. 11. A device according to claim 1, comprising means for remote information which are actuated when the driven member has reached its stopping position. 12. A device according to claim 11, wherein said means for remote information comprise an electric contact device. 13. A device according to claim 1, comprising means for stopping the movement of said driving means, which are actuated when the driven member has reached its stopping position. 14. A device according to claim 13, wherein said means for stopping the movement comprise an electric contact device. |
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