US Patent: 1,679,541
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| Shaper
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Patentee:
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| Frank Wesley Parker (exact or similar names) - Boise, ID |
| USPTO Classifications: |
| 74/27 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 07, 1927 |
| Granted: |
Aug. 07, 1928 |
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Joel Havens
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Description: |
| Watson, Coit, Morse & Grindle - patent attorneys
This invention relates to reciprocating drive mechanisms, and more particularly to that type of mechanism as applied to metal working machinery. More particularly the invention relates to a reciprocating drive mechanism of positive type for driving the cutting heads, rams, travelling beds, and so on, of metal working machinery. It is a general object of the present invention to provide a novel and improved form of reciprocating drive mechanism. A further object of the invention is to provide a reciprocating drive mechanism of generous proportions, with capacity for a relatively long stroke of the reciprocating member, without necessitating an increase in the customary height of the machine. One of the features of the invention consists in arranging a reciprocating drive mechanism in such a manner as to produce an extremely compact machine in which the drive is positive and intended to provide, throughout the full stroke, adequate power for cutting purposes. Another feature of the invention consists in the arrangement, in a machine tool, of a rack secured to the base of the machine, of a second rack secured to the reciprocating portion of the machine and of a toothed member arranged between the two racks and engaging each and adapted to be itself reciprocated. A further feature of the invention consists in the provision of a reciprocable slide incorporated into a mechanism of the type described, and adapted to be reciprocated on the column of the machine and to carry a rocker wheel which co-acts with the stationary and movable racks. One of the other features of this invention consists in providing a means for extending the stroke of the reciprocating member to any desired length, within the limit of the machine, without either appreciably diminishing the power delivered to the cutting tool, or greatly retarding the cutting speed, at the beginning and ending of each forward stroke, nor unduly speeding up the return action at certain other positions within the range of the reciprocating movement.
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