US Patent: 890,211
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| Machine-Tool-Operating Mechanism
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Patentee:
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| Stanley H. Bullard (exact or similar names) - Bridgeport, Fairfield County, CT |
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Patent Dates:
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| Applied: |
Jul. 03, 1907 |
| Granted: |
Jun. 09, 1908 |
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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:
Machines of the class to which my invention belongs comprise in part a rotary work carrying table, adjustable tool heads to operate upon the stock carried by the work holder, means for driving the table and feeding the heads across the work, and to two sets of changeable speed mechanisms for operating the table, one set of-which may represent a subdivision of the first. The particular machine to which I have herein shown my invention applied also includes improved mechanism for conveniently changing the speed of rotation of the table, and means for feeding the heads in the performance of their work in a simple and practical manner, and it also embodies brake mechanism whereby the rotation of the table may be quickly and effectively stop)ped. It further includes means for preventing the setting of the brake while either of the first or main sets of clutches are in engagement with the main driving shaft, thus avoiding any possible injury to work, or machine. It is therefore the object of my invention to provide means in connection with the clutch gears and brake mechanism of a machine of the above class, whereby it may readily be determined which of the several speeds are in engagement; to provide means for determining the relative positions of the two speed mechanisms, and to clearly show the operator the direction to operate the respective mechanisms~ to obtain certain desired changes of speeds, and finally to provide means whereby the brake nay be held in its locked-position.
Claim:
The combination of a series of clutches, a brake, a shaft for operating both the clutches and brake and means for holding said shaft in a position to engage the brake. |
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