US Patent: 1,285,019
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| Feed-Works for Machine-Tools
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Patentees:
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| William N. Stevens (exact or similar names) - Bridgeport, Fairfield County, CT |
| Edward Payson Bullard, Jr. (exact or similar names) - Bridgeport, Fairfield County, CT |
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Patent Dates:
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| Applied: |
Dec. 31, 1915 |
| Granted: |
Nov. 19, 1918 |
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Patent Pictures:
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Joel Havens
Vintage Machinery entry for Bullard Machine Tool Co.
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Description: |
| Abstract:
This invention relates to new and useful improvements in feed works for machine tools and refers particularly to mechanism for operating the head that carries the cutting tools.
While the feed works is susceptible of a wide application to machines of various types, yet it will be seen that it is illustrated in connection with a novel type of multiple spindle machine of the general type and character shown and described in a prior application on a multiple spindle machine #811,198 filed Jan. 9, 1914. (Patent #1,258,089.) This feed works is particularly useful in connection with a machine of this type or in fact any machine which includes an operatable tool carrying slide that is adapted to be operated by a feed screw, as is the case with this machine, which is now commercially known as the Mult-Au-Matic.
The purpose. of this invention is to provide an improved design which does not alone perform a simple feeding operation of the tool carrying slides, but
one which includes a quick forward movement of the feed screw to bring the cutting tool in position for operation; and which further comprises means for then connecting the feed for the cutting tool; further to provide automatic means for tripping the operating or cutting feed when its work is completed and quickly returning the slide to its starting position preparatory to a further operation.
A further object of the invention is to overcome objections now existing in other forms of feeds, whereby a more powerful and rigid feed may be had including the use adording an opportunity and the ability of change; gears for cutting exact pitches, to operate said feed works by hand independent of the other feed works on the machine sending it through all or part of its cycle of operations as occasion requires, finally to provide a load weighing or regulating device whereby the load under which the head is feeding may be predetermined and set to insure uniform operations, and further to provide means whereby an excessive load will engage the clutch to return the head to its position of rest.
Claim:
ln a feed works of the class described, the combination of a tool slide, a threaded element, a feed screw, means for quickly driving the same in a forward direction to place the slide in position for operation, means for advancing the feed screw for the feeding operation, a pivoted weighted arm for regulating the pressure under which the screw may operate, and means for rapidly driving the screw in a reverse direction to return the slide. |
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