US Patent: 1,132,179
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| Key Seating Machine
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Patentee:
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| Chester Hacking (exact or similar names) - Pawtucket, RI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 13, 1914 |
| Granted: |
Mar. 16, 1915 |
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Patent Pictures:
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Joel Havens
Crompton & Knowles Corp.
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Description: |
| Southgate & Southgate - patent attorneys
This invention relates to a key seating machine and to other similar machines in which a longitudinally movable tool is operated through a rack and pinion drive. In machines of this type it is customary to limit the length of the rack in order that it may be impossible to force the rack longitudinally into contact with fixed portions of the machine. It often happens that the driving pinion is not reversed at the proper moment and the rack is thus moved out of working relation to the pinion before the pinion is stopped or reversed. It is then necessary to move the rack bar manually until it again engages the pinion. If the pinion is rotating in a reverse direction, the teeth of the pinion or of the rack are often damaged by this method of procedure, as it is impossible to bring the parts into cooperation in any predetermined relation. It is the object of my invention to provide means for automatically returning the rack into position to engage the pinion and for insuring that the parts shall be in operative relation to each other when thus engaged. With this object in view, my invention contemplates the provision of means for yieldingly forcing the rack bar toward the driving pinion, so that the rack shall immediately engage the pinion in proper operative relation when the rotation of the pinion is reversed. |
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