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US Patent: 1,285,019
Feeds Works for Machine Tools
Edward P. Bullard, Jr. - Bridgeport, Fairfield County, CT
William N. Stevens - Bridgeport, Fairfield County, CT

USPTO Classifications:
192/89.29, 29/38A, 29/64

Tool Categories:
metalworking machines : metalworking machine mechanisms
metalworking machines : metal lathes : multiple spindle lathes

Bullard Machine Tool Co. - Bridgeport, Fairfield County, CT

Bullard Machine Tool Co. - Bridgeport, Fairfield County, CT


Patent Dates:
Applied: Dec. 31, 1915
Granted: Nov. 19, 1918

Patent Pictures: [ 1 | 2 ]
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"Vintage Machinery" entry for Bullard Machine Tool Co.
Chamberlain & Newman - patent attorneys

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 patent on a multiple spindle machine # 1,258,089 filed Jan. 9, 1914. This feed works is particularly useful in connection with a machine of this type or in fact any machine which includes an operable 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-AuTMatic. The purpose of this invention is to provide an improved design of feed works 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, of change gears, affording an opportunity for cutting exact pitches, and the ability 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. To provide a screw feed operated by clutches which is rigid and satisfactory, and so that the engagement and disengagement of the clutches may vary with the load under which the head is working; to provide means whereby the head may be fed to a predetermined point within a degree of accuracy in feeding and returning, which has not heretofore been accomplished.

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