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US Patent: 807,274
Gearing for Lathes or Other Tools
Patentee:
Israel H. Johnson, Jr. - Philadelphia, PA

USPTO Classifications:
74/333, 74/348, 74/384

Tool Categories:
metalworking machines : metalworking machine mechanisms
metalworking machines : metal lathes : engine lathes

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Will. A. Barr
Joseph H. Klein
Titus H. Irons
Louis S. Buck

Patent Dates:
Applied: Mar. 02, 1904
Granted: Dec. 12, 1905

Patent Pictures:
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"Vintage Machinery" entry for Israel H. Johnson Jr. & Co.
Description:
Abstract:

My invention relates to the feed mechanism of the tool-carriage of a lathe or other tool in which the speed of the moving part has to be varied according to the work.

The object of my invention is to make a compact and-easily-operated change-gear by which any number of changes can be made very quickly and without detaching the gearing from the lathe.

Claims:

1. The combination in change-gearing, of a driving-shaft, a gear-wheel mounted on the shaft so as to turn with it but to slide there on, an arm, a gear-wheel carried by the arm and meshing with the gearwheel on the shaft, a driven shaft, a series of gears secured to said shaft, said gears differing in diameter, a casing inclosing the said gears, a perforated plate secured to the casing and having a series of notches corresponding to the gears, the said arm extending under the casing and having a portion bent relatively to the remainder, with a pin arranged to be projected into any one of the perforations in the plate, and a lug also on the arm arranged to enter any one of the notches to bring the arm in proper alignment with a perforation and with the gear corresponding thereto, substantially as described.

2. The combination of a driving-shaft having a longitudinal groove therein, a gearwheel mounted on the shaft and having a spline entering the groove so that the gearwheel will turn with but slide on the s aft, an arm mounted on the extended hub of the gear-wheel and bent substantially as described, a driven shaft, a series of gears secured to said shaft, said gears differing in diameter, an independent casing inclosing the gears and having the bearings for the two shafts, a stud on the arm, a gear-wheel carried by the stud and meshing with the gearwheel on the driving-shaft, said gear-wheel on the stud being movable to mesh with any one of the gears on the driven shaft, said arm extending under the frame, a notched and perforated plate secured to the frame, a lug on the arm arranged to enter the notches and to limit the movement of the arm, and a pin carried by the arm and arranged to enter any one of the perforations in the plate, substantially as described.

3. The combination in change-gearing of a driving-spindle, means operatively connecting said spindle and shaft including a driven shaft, a series of ears differing in diameter, a shaft, a gear splined to said shaft and arranged to slide thereon, an arm, an intermediate gear carried thereby and arranged to mesh with any one of a series of gears and with the gear on the spline-shaft, means for adjusting said arm, with a plurality of sets of change-gearing between said mechanism and the driving-spindle, each of said sets including a plurality of shafts, intermeshing gears, of which certain are loose on their shaft, a sliding rod, and a key for connecting any one of the loose gears with its shaft, substantially as described.

4. The combination in change-gearing of a driving-spindle, a driven shaft, a series of gears differing in diameter, a shaft, a gear splined to said shaft and arranged to slide thereon, an arm, an intermediate gear carried thereby and arranged to gear with any one of the series of gears and with the gear on the spline-shaft, means for adjusting said arm, two sets of change-gearing between the said mechanism and the driving-spindle, and reverse mechanism between said two sets of change-gearing, substantially as described.

5. The combination in change-gearing of a supporting-frame, a driving-spindle, a shaft geared to the said spindle, three change gears loosely mounted on the shaft, a key-rod constructed to lock any one of the gears to the said shaft, a stud mounted on the frame, three gears loose on the said stud and meshing with the three gears on the shaft, a reverse-lever, two gears therefor, means for locking the reverse-lever in position, a bearing-frame, a shaft carried thereby, a gearwheel for said shaft constructed to mesh with either one of the wheels on the reverse lever, a gear-wheel and a pinion on the said shaft, an intermediate shaft, a gear-wheel and pinion loose thereon, a key-rod constructed to lock either the gear or pinion to the shaft, said shaft having a keyway, a gearwheel mounted on said intermediate shaft, a key entering said keyway so that it will turn with the shaft but be free to slide thereon, an arm pivoted to the shaft, an intermediate gear carried by said arm, a driven shaft, a series of gears differing in diameter on said shaft, said arm being movable to bring its gear into line with any one of the gears, and means for locking the arm in position, substantially as described.

6. The combination in change-gearing, of a driving-spindle, a shaft geared to the said spindle, three change-gears loosely mounted on the shaft, a key-rod constructed to look any one of the gears to the said shaft, a stud, three gears loose on the said stud and meshing with the three gears on the shaft, a reverse lever, two gears therefor, means for locking the reverse-lever in position, a bearing-frame, a shaft carried thereby, a gearwheel for the shaft placed to mesh with either one of the gears of the reverse-lever, a gear-wheel and a pinion on the said latter shaft, an intermediate shaft, a gear-wheel and pinion loose thereon, a key-rod constructed to lock either the gear or pinion to the shaft, said shaft having a keyway, a gearwheel mounted on said shaft, a key for said wheel entering the keyway so that it will turn with the shaft but be free to slide thereon, an arm pivoted to the shaft, an intermediate gear carried by said arm, a driven shaft, a series of gears differing in diameter therefor, said arm being movable to bring its gear into line with any one of the gears, and means for locking the arm in position, a screw-shaft and reversing mechanism between the screw-shaft and the driven shaft, substantially as described.

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