US752223A - Charles s - Google Patents

Description

PATENTED PEB.' 16, 1904,

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PPLIUATION FILED 00T. 22, 19.03.

E0 IODEL.

UNITED STATES Patented February 16, 1904.

PATENT FEICE.

CHARLES S. HISEY, OF DAYTON, KENTUCKY, ASSIGNOR TO THE HISEY- WOLF MACHINE COMPANY, OF CINCINNATI, OHIO, A CORPORATION.

VARIABLE-SPEED MECHANIASNI.

SPECIFICATION forming part of Letters Patent No. 752,223, dated February 16, 1904.

- Application filed October 22, 1903. Serial No; 17 8,105. (No model.)

To all whom it may concern,.-

Beit known that I, CHARLES S. HIsEY, a citizen of the United States, residing at Dayton, in the county of Campbell and State of Kentucky, have invented certain new and useful Improvements in Variable-Speed Mechanism, of which the following is a specication.

My invention relates to a variable-speed contrivance particularly adapted to small or hand devices, such as portable hand-drills, electric driven. In these devices the space available is very little and the disposition of the main feed-shaft is so close to the spindle that an arrangement of gear-Wheels has to be devised particularly adapted to this limited scope of disposition.

Thefeatures of my invention are more :fully set forth in the description of the accompanying drawings, forming a part of the specification, in Which- Figure 1 is a plan view of. my device attached. Fig. 2 is a section on line ma, Fig. 1. Figs. 3 and 4 are plan views of the gearing, illustrating the relative positions in the fast and slow speeds. Fig. 5 is a detail sectional view on line w w, Fig. 1.

A represents the head of the easing inclosing the motor.

B represents the armature-shaft or main feed-shaft, on which is fixed the driving-pinion 1.

C represents the drill-spindle shaft, to whichk it is desired to impart a fast and a slow speed from shaft B.

D represents a journal-stud mounted on the head A and carrying the gear-wheel 2, in mesh with pinion 1 on shaft B.

E F represent the'members of a compound tumbler-lever, which are pivoted together by the stud-pin e. One end of the member F has a journal-sleeve Z), journaled on the spinalle-shaft C.

c represents a stud-pin on theouter member E of the compound tumbler-lever. G represents the' moving end of this compound tumbler-lever, which is provided with a segmental .or cam slot d, through which projects the clampingscrew post H, which screw threads into the casing A and upon which post is A the ulcrum of the members E F, are the compound gear-wheels 5 6, gear-wheel 5 beinginintermesh with gear-Wheel 3 on the stud-pin c at all times.' The spindle-shaft C is provided with the final driven gear-Wheel 7, constantly intermeshed with the gear-wheel 6 on the stud-pin a. The end of the tumbler G has the finger-clasp g for swinging the compound tumbler.

' Of course the casing-cap A is slotted at la and-r to admit of the movements of the studpins a and-c.Y Also the cap has orifices for passing. the armature shaft and spindle.

If the nut H is released and the handle g grasped and swung to one extremity of the slot CZ, the compound tumbler-lever E F Will fulcrum on the spindle C and the member E will fulcrum on the. member F toswing the gear-wheel 4 in mesh with the gear-Wheel 2, and the transmission will be through the gearwheels 1 2 1- 3 5 6 7, in the order named. If the handle g be manipulated to bring the other extremity of the slot d into engagement with the binding-post H, gear-wheel i will be disengaged from gear-wheel 2, and gear-wheel 5 will be thrown into mesh with the driving gear-'Wheel 1, the transmission being through gear-wheels'l, 5, 6, and/7, in the order named, and gear- wheels 2, 3, and 4 being disengaged obviously rotate as idlers.

It is evident that the walls of the slot CZ of the moving end G of the compound tumblerlever have a cam action on the clamping-post H, which causes the outer end of the tumblerlever to move toward the gear-wheel 2 and to cause the middle joint a of the compound tumbler-lever to move away from the driving gear-wheel 1. when the compound tumblerlever is swung in one direction.

compound tumbler-lever is swung in the other When the direction, the engagement of the post H and f compass and Without interfering withvthe close disposition of the feed shaft and spindle necessary in such a motor-driven drill.

The movement of the compound tumblerlever required to make the two changes is so slight and the movement so exact that the tumbler-lever can be readily shifted while the armature-shaft is in motion without danger.

The arrangement of gearing thus described gives two changes of speed to the driven shaft in the same direction.

rIhe invention is preferably applied to the armature-shaft; but I use the term first and second shaft in the claims as involving a generic application of the principle.

The direction of transmission might be reversed without departure from the principle of the invention, and I do not, therefore, desire to be limited to the relative position of the driving and driven shafts. Also various means might be employed to 'give the free end of the compound lever a cam engagement or the equivalent thereof with the casing, so as to cause the middle-joint and the outer end of the tumbler-lever to move in opposite directions when the tumbler-lever is swung in either direction on its main fulcrum. Also obviously any suitable lock may be employed for fixing the tumbler-lever in position.

Having described my invention, I claim* 1. In an electric-driven drill, the casing, an armature feed-shaft and drill-spindle, supported in parallel position in the casing, a driving and a driven gear thereon respectively, an intermediate gear-wheel journaled on the casing and intermeshed with the gear on the feed-shaft, a tumbler, gearing thereon, and means for swinging the tumbler in opposite directions whereby varied trains of gears alternately engage the said driving and intermediate gear-wheels, substantially as described. 2. In a drill, a feed-shaft and spindle in parallel planes, a driving and a driven gearwheel thereon respectively, an intermediate gear-wheel journaled on the casing and intermeshed with the gear on the feed-shaft, a tumbler fulcrumed on one of said shafts, a train of gear-wheels thereon, in mesh with the gear-wheel on the fulcrum-shaft of the tumbler, and means for shifting said tumbler in opposite directions, whereby two different trains of gear-wheels are alternately engaged between the feed-shaft and spindle, substantially as described.

3. In a drill, a casing, a feed-shaft and spindle disposed therein in parallelplanes, a

driving and a driven gear-wheel thereon re- Vfirst-named gear-wheel, a tumbler fulcrumed on one of said shafts, a train of gear-wheels thereon in mesh with the gear-wheel on the fulcrum-shaft, and means for swinging said tumbler in opposite direction whereby different members of the gearing are alternately intermeshed with the gear-wheel on the other of said shafts or with said intermediate gearwheel, substantially as described.

4. In a drill, a casing, a rst and second shaft parallel therein, gear-wheels thereon, an intermediate gear-wheel journaled on the casing and intermeshed with the outside of saidgear-wheel on the rst shaft, a tumbler-lever fulcrumed on the second shaft, gearing on the tumbler intermeshed with the gear on the second shaft, and means for swinging said tumbler in opposite directions whereby different members of the tumblergearing are alternately intermeshed with the intermediate gearwheel or with said gear-wheel on the lirst shaft, substantially as described.

5. In a drill, a casing, a rst and second shaft parallel therein, gearwheels on said shaft, an intermediate gear-wheel journaled on the casing and in intermesh with the gearing on the first shaft, a compound tumblerlever, one end of which is fulcrumed on the second shaft, compound gears on the middle joint and on the end of the tumbler-lever in train with one another and with the gear- Wheel on the second shaft, nand means for shifting said compound tumbler-lever whereby in one direction of movement the compound gearing on the end of the tumbler-lever is intermeshed with the intermediate gear, and in the other direction of movement the compound gearing on the middle joint of the tumbler-lever is intermeshed with the gear on the first shaft, substantially as described.

6. Inadrill, acasing, airst and second shaft parallel therein, gear-wheels thereon, an intermediate gear-wheel journaled on the casing and intermeshed with the gear on the first shaft, a compound tumbler-lever one end of which is fulcrumed on the secondV shaft, compound gears on the end of the tumbler-lever and on the middle joint thereof, in train with one another and the gear-wheel on the second shaft, the swinging end of said tumbler compound lever being provided with a cam-slot, and a clamping-post on the casing engaging through said slot, whereby when the lever is moved to one extremity of the slot, the gearv ing on the end of the lever is moved toward the intermediate gear-wheel, the gearing on the middle joint of the lever being moved from the gear-wheel on the first shaft, and when the lever is moved tothe other extremity of the slot the middle joint is moved toward the first shaft, and the end ofV the .tumbler-lever away III from the intermediate gear,substantially as described.

7. In a drill, a casing, afirst and second shaft parallel therein, gear-wheels thereon, an intermediate gear-wheel joui-nailed on the casing and intermeshed with the gear on the first shaft, a compound tumbler-lever one end of which is fulcrumed Aon the second shaft, the middle joint and the outer end of said tumbler-lever having stud-pins, the head of the casing'having slots through which project the said stud-pins, compound gears on said studpins in train with one another, and with the gear on the second shaft, the outer end of said lever having a cam engagement with the casing adapted to move the end of said lever in opposite direction from the direction of movement of the middle joint, when said lever is swung in either direction on its fulcrum, whereby the gear on the first shaft and its intermediate gear are alternately brought into train with different members of the gears on the tumbler-lever, substantially as described.

8. ln adrill, a casing, a first and second shaft parallel therein, the casing having a cap forming a seat for variable-speed mechanism, and

having orifices for the passage of said first and second shafts, gear-wheels on said shafts within the cap, an intermediate gear-wheel journaled on the inside of the cap, intermeshed with the gear-wheel on the rst shaft, a compound tumbler-lever one end of which is fulcrumed on the second shaft, outside of the cap, the middle joint of the lever, and the outer end having stud-pins internally projecting through slots in the cap, compound gears on said stud-pins within the cap, in train with one another, and the gear-wheel on the second shaft, and means for manipulating the tumbler-lever to throw different members of the compound gears into mesh with the intermediate gear and the gear on the first shaft, when said lever is swung in opposite directions, substantially as described.

9. In adrill, a casing, an armature-shaft and a spindle parallel therein, a tumbler, and seven gear-wheels arranged on the casing, shafts and tumbler adapted to be thrown into two trains as the tumbler is swung in opposite directions to give two changes of speed in the same direction of rotation of the driven shaft, substantially as described.

10. In a drill, an armature-shaft and a spindle arranged close together in parallel planes, a gear-wheel arranged on each to pass each other without engagement, an intermediate gear-wheel intermeshedwith one of said gearwheels, a tumbler, a train of gearing thereon, meshing with one of the first-named gearwheels and means for swinging said tumbler and connecting said shafts and spindle in varied trains alternately, substantiallj7 as described.

h Inl testimony whereof I have hereunto set my CHARLES S. HISEY.

Witnesses:

OLIVER B. KAIsER, Luisa BECK.

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