US Patent: 828,875
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| Counterbalancing Device
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Patentee:
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| Edward Payson Bullard, Jr. (exact or similar names) - Bridgeport, Fairfield County, CT |
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Patent Dates:
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| Applied: |
Nov. 28, 1905 |
| Granted: |
Aug. 21, 1906 |
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Joel Havens
Vintage Machinery entry for Bullard Machine Tool Co.
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Description: |
| This patent was listed on a Bullard Maxi-Mill patent plate.
Abstract:
My invention relates to new and useful improvements in adjustable counterbalancing devices for use in connection with machinery of various kinds, and especially boring-mills, lathes, and planers. In machinery of this character numerous devices have been used to counterbalance the weight of the head, rail, and other parts of the machine to insure ease of operation and adjustment. The more common constructions of the above counterbalance devices include a weight and chain, the latter being carried up and over rollers of suitable arms. This form of counterbalance, which, as before stated, is largely used, is in many instances undesirable, owing not only to its objectionable appearance, but also to the great amount of room required for the long arms employed, and, further, to the fact that they are more or less difficult to operate. I have therefore devised my present construction with a view of overcoming the above objections and producing a counterbalance which shall first be applicable to machines of various kinds and makes, which shall be neat, compact, and easily operated, and which shall be particularly well adapted for use on boring-mills and vertical lathes.
Claim:
A counterbalance comprising a rack, a pair of adjoining but independent pinions connected with the rack, a weight and connections therefrom to one of said pinions, and a second and distinct connection with the other pinion for adjusting the rack as desired. |
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