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US Patent: 759,111
Variable Speed Gear for Motor Diven Lathes or Other Tools
Patentee:
Israel H. Johnson, Jr. - Philadelphia, PA

USPTO Classifications:
74/353

Tool Categories:
metalworking machines : metalworking machine mechanisms : metalworking machine gearing : metalworking speed changing mechanisms
metalworking machines : metal lathes : engine lathes

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Will. A. Barr
Joseph H. Klein
Hamilton D. Turner
Herman E. Nuhus

Patent Dates:
Applied: Jun. 03, 1903
Granted: May 03, 1904

Patent Pictures: [ 1 | 2 ]
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"Vintage Machinery" entry for Israel H. Johnson Jr. & Co.
Description:
Abstract:

The object of my invention is to provide means whereby a lathe or similar tool can be driven from an electric motor through change gearing, which can be quickly and accurately shifted so as to vary the speed of the spindle without altering the speed of the armature shaft of the motor.

While my invention is especially designed to be used in connection with an electric motor, it will be understood that it can be used in connection with any suitable motor in which it is desired that the speed of the main shaft of the motor should not be varied.

Claims:

1. The combination of a driving-shaft, a pinion thereon, a driven shaft, a gear wheel through which motion is imparted to said driven shaft, a bearing-disk, a-supporting structure therefor, one of the members comprised by the structure and the disk having a guiding-flange and the other a recess therefor, a series of shafts carried by the bearing-piece, a plurality of gears on each of said shafts, one set of said gears being placed to mesh with the driving-shaft pinion and the other of said sets of gears being placed to mesh with the gear-wheel on the driven shaft, said parts being so arranged that when one shaft and its gears are entrain, the remaining shafts are out of action, substantially as described.

2. The combination of a driving-shaft having a pinion, a driven shaft, a gear-wheel for driving the same, a two-part casing, a bearing disk mounted in the casing, means for clamping together the parts of the casing to prevent motion of the bearing-disk, means for moving said disk, shafts carried by the disk, each having a plurality of gear-wheels, one set of said gears being placed to mesh with the pinion on said driving-shaft and the other set being placed to mesh with the gear of the driven shaft, substantially as described.

3. The combination of a supporting structure, a bearing-disk mounted thereon, a series of shafts carried by the bearing-disk, a plurality of gears on each of the shafts, a driving shaft having a pinion placed to be engaged by one set of said gears, a driven shaft having a gear placed to be engaged by the second set of said gears, there being lubricant-ducts in the bearing-disk communicating with the bearings of each shaft, a lubricator on the supporting structure having a conduit placed to align with the duct of that particular shaft which is entrain with the pinions on the driving-shaft and with the gear on the driven shaft, substantially as described.

4. The combination of a driving-shaft having a pinion thereon, a driven shaft, a gearwheel for driving said driven shaft, a two-part casing, a bearing-disk mounted in the casing, means for clamping the casing to the bearing disk, an annular rack on the bearing-disk, a pinion on one portion of the casing meshing with the teeth of the rack so as to turn the bearing-disk, shafts carried by the bearing disk, each shaft having a gear-wheel at each end, one set of gears meshing with the driving-shaft pinion and the other meshing with the gear of the driven shaft, substantially as described.

5. The combination of a driving-shaft, a pinion thereon, a driven shaft, a gear for driving said shaft, a two-part casing, a bearing-disk mounted in the casing, said casing being eccentric to the driving-shaft, a series of shafts on the casing, each shaft having a gear at each end, the several gears varying in diameter and so proportioned that any one of the shafts can be moved into operative position with the driving-shaft and the driven shaft, means for turning the bearing-disk, and means for looking the two-part casing after the disk is turned, substantially as described.

6. The combination of a casing, a bearing disk mounted in the casing, a series of transmitting-spindles carried by the said bearing disk, gears on each end of said spindles, a driving-shaft having a pinion with which one set of gears mesh, a driven spindle having a gear with which the other set of gears mesh, lubricant-ducts in the bearing-disk communicating with the bearings for each transmitting-spindle, a fixed lubricator on the casing arranged to align with the duct of the transmitting-spindle which is entrain with the driving-shaft and driven spindle, substantially as described.

7. The combination of a driven shaft, a sleeve thereon, a gear on the sleeve, a driving-shaft, a pinion thereon, a two-part casing, a bolt and handled nut for clamping the two parts of the casing together, a circular bearing-disk mounted in the casing and having an annular rib thereon fitting an annular recess in the casing, an annular rack on the bearing-disk, a pinion with which the rack engages, a handled shaft for turning said pinion, a spring-pin carried by the casing and arranged to enter notches in the bearing disk, a series of shafts extending through the bearing-disk, a gear-wheel on each end of each shaft, the said gear-wheels varying in diameter, the driving-shaft being eccentric to the bearing-disk so that only one shaft of the bearing-disk will be in motion when power is transmitted from the driving to the driven shaft, substantially as described.

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