US Patent: 877,402
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| Vertical Turret-Lathe
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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: |
Apr. 23, 1904 |
| Granted: |
Jan. 21, 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:
The main object of my invention is to construct a compact machine which will not only include within the scope of its operations at those now performed by boring mills, turret lathes, and engine lathes, but one on which the work can be handled more advantageously and the various operations performed more conveniently and expeditiously than on those machines. To a limited extent this object has been attained by machines now in use, among which may be mentioned the vertical turret lathe described in Letters Patent of the United States No. 683,592, issued to me Oct. 1, 1901. In the latter machine the cross -head and side -head are mounted upon stationary guide-ways placed 35 in different planes and the tool of each head is adapted to be fed crosswise or lengthwise of the axis of rotation of the table. The utility of machines of that general design, however, is limited in that the tool of neither head can be fed at an oblique angle to the table, a requirement demanded by a large class of work; the cutting capacity of the side tool is also limited in that the side-head, in its upward travel, strikes the cross guide- 45 ways before its tool has reached a height from the table corresponding to that of the underside of the guide-ways, which ways should, in a compactly designed machine, determine the range of vertical cut; and the efficiency such machines, from the standpoint of quick adjustability of the cutting tools of each head to the work, is restricted in that the heads are adjusted lengthwise of the work independently instead of conjointly and independently. Included in the main object of my invention, therefore, are the following specific objects, the fulfillment of which wholly eliminates the restrictions and limitations above mentioned, to wit:—to so design the two heads of the machine that the cutting tool of each will have a transverse and longitudinal movement the full axial and radial swing of the rotary table, and to so combine them that their respective cutting tools may5 be brought into close contact with each other anywhere within their sphere of operation, and in that position fed conjointly crosswise or lengthwise of the axis of rotation of the work, whereby the two tools for instance 70 may be conjointly used on a crosswise or lengthwise roughing cut, thus accomplishing by their joint use twice as much as could be accomplished by either tool alone; to so design each head that its cutting tool may be 75 fed at any desired angle to the table, and to so support them that they may be either conjointly or independently adjusted lengthwise of the axis of rotation of the work supporter upon the rotary table; to so design 8 the machine that the side-head and its feed mechanism will be entirely independent of the crosshead and its feed mechanism, and hereby capable of being added to the ma- shine at any future date, thus providing a machine that can be constructed and sold ;ither as a cross and side-head machine completed, or as a crosshead machine alone, with the option in the purchaser of the single head machine of purchasing the side-head and adding it to the machine at a later date his special requirements demand it, and finally to so design the machine that it may e built and placed on the market at a comparatively low figure. In illustrating my invention I have purposely omitted certain details that are common to all machines of this class and have partially outlined certain features which are reserved for separate applications.
Claim:
The combination, with frame-work, of a work-supporting table; means for rotating said table; a horizontal guideway; a vertical guideway beneath and in substantially the same plane with the horizontal guideway; a saddle adjustable upon each of said guide ways; a tool-slide carried by each saddle, each slide being arranged to project over and clear the guide-way's on which the saddle supporting the other slide is adjustable; a toolholder on one of said slides; and a toolholder on the other of said slides. |
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