US1063984A

US1063984A - Change-speed gearing.

Info

Publication number: US1063984A
Application number: US67990412A
Authority: US
Inventors: John A Leland
Original assignee: Millers Falls Co
Current assignee: Millers Falls Co
Priority date: 1912-02-26
Filing date: 1912-02-26
Publication date: 1913-06-10
Anticipated expiration: 1930-06-10

Description

J. A. LELAND.

CHANGE SPEED GBARING.

APPLICATION FILED FEB. 26, 1912.

1,063,984. Patented June 10, 1913.

COLUMBIA FLANOCIRAPH co" WASHINGTON, D c,

UNITE @TrkTEg @FFlltlF.

JOHN A. LELAND, OF MON'IAGUE, MASSACHUSETTS, ASSIGNOR TO MILLERS FALLS COMPANY, OF MILLERS FALLS, MASSACHUSETTS, A CORPORATION OF MASSACHU- SETTS.

CHANGE-SPEED GEARING.

Specification of Letters Patent.

I iatentetl June 10, 1913.

To all whom it may concern:

Be it known that 1, JOHN A. LELAND, a citizen of the United States, and a resident of Montague, in the county of Franklin and State of lWlassachusetts, have invented cer tain new and useful Improvements in Change-Speed Gearing, of which the following is a specification.

This invention relates to tools of the type known as hand drills, or breast drills, and the invention refers particularly to the structure of the gearing which is employed for changing the speed, although my invention is not limited to this particular type 01" implement.

Obviously the gearing may be employed for driving or rotating a tool other than a drill.

One of the objects of the present invention is to provide an improved speed change mechanism which will enable the speed to be shifted at any time without withdrawing the tool from the work.

Another object of the, invention is to provide an improved mechanism of this type which will enable the gears to be locked whereby the driven spindle or shaft can have a tool more conveniently connected thereto.

Another object of the invention is to provide improved mechanism for enabling the gearing to be operated by either a right hand ratchet motion or a left hand ratchet motion or positively.

To these ends the invention consists in the construction and combination of parts substantially as hereinafter described and claimed.

()i the accompanying drawings,-Figure 1 is a side elevatioiroit sullicicnt parts of a, breast drill embodiment of the invention to illustrate my improvements, parts being broken out and the other parts in section. Fig. 2 is a view lookingt'rom the left of Fig. 1 with the gearing members in section, and the chuck omitted. Fig. 3 represents a section on line of Fig. 1. Fig. 4 is a detail elevation of. the slide by means of which the change oi speed is primarily e'tlected. Fig. 5 is a detail view on an enlarged scale oi. a portion of the crank ratchet mechanism. Fig. (3 is a view similar to Fig. 5, but omitting the head of the ratchet controlling" stud, and showing the ratcheting pawl in section. Fig. 7 is a detail side elevation of the -ateheting pawl, a portion of the recessed disk for operating therewith being shown in scction. Fig. 8 is a detail perspective of the ratcheting pawl and its stud.

Similar reference characters indicate the same or similar parts in all of the views.

The frame 10, which may be a single casting, is provided with handles, portions of which are indicated at 1.1 and 12. Rotatably mounted in said frame is a spindle 13, which, when the implenlent is what is known as a breast drill or hand drill, is provided with a suitable chuck 11 at its outer end. The iuner end ot the spindle is supplied with a roller bearing 15, to sustain end thrust.

Loosely mounted on the spindle 13, and within a semicircular or shell like portion of the frame, are two

pinions

16 and 17. A clutch hub 11.8 is secured to the spindle as by means of the transverse pin 19, between the two pinions 1(3 and 17. The hub 18 is provided with longitudinal sockets or borings :for liolts 20. 21, each bolt having a spring 22 between its inner.end and the bottom of the socketto normally project it so as to engage a recess or keeper in a pinion when the bolt is released and permitted to be projected by its spring as presently described. lVlounted on the hub 18 and slidable lougitudinally thereof is a sleeve 23 having an external annular groove 9-1: which receives a pin 25 projecting from a. controlling slide 96. The sleeve 25) provided with a pin or screw 27 for each of. the bolts. the inner end of such pin passingthrough a longitudinal slot in the slide of the hub 18 and into an elongated recess in its bolt.

The frame of the implement is rn'ovided with a stud 28 on which is mounted a sleeve 2!). ()n the latter is mounted the hub 3b of a compound gear having an inner circular series ol" teeth 31 and an outer circular series of teeth 32. These two series of teeth will be hereinafter referred to rcspcctiwly as the small gear and the large gear. They are con stantly in mesh with the two pinions 1G, 17 as presently described and the crank hereina'ller described rotates both of the gears 31. 32.

Projecting 'l'rom one side oi the semi-cylindrical portion of the frame are two pins or screws 33 which pass through slots Fl-lin the slide 26, thereby serving to guide the latter. (inc end ot the slide is provided with a knob or handle 35 containing a spring 'pair of radial notches 43.

hub as by pins 39. The recesses are indi= cated at 40. The crank 41, having a suitable handle is connected to the sleeve 29, and is orovided with a tubular bearin 41:2 the outer end of which is provided with tour radial notches 13. Mounted in said tubular bearing is'a stud l l having a beveled block or :pawl 45 at its inner end, and having a transverse pin l6 adapted to engage either A spring 47 tends to hold the pawl 45 in the position indicated in Fig. 2. The stud 4:4 is provided with a head or knob l8 by means of which the stud and the pawl 45 can be drawn outwardly and given more or less of a rotation.

It will now be understood that when the pawl 45 is in the position shown in Fig. the compound gear can be rotated positively in either direction by manipulation of the crank 41. By grasping the knob L8 and partially withdrawing the stud a4 and then giving said stud a quarter rotation and permitting the ends of the pin 16'to return into engagement with the radial notches 43, the pawl 45 will then beiset so as 'to permit ratcheting. This is best illustrated in Fig. .7, "which illustrates the beveled side or" the pawl as in such position relatively to one side of one of the recesses 10, while an abrupt side of the pawl bears against the other side of such recess as to result in movement of the crank 41 in one direction driving-the disk 38 and the compound gear while movement of the crank in the other direction will result in the pawl yielding and passing the notches of the disk without transmitting motion to the compound gear. Of course by reversing the direction of the inclination of the pawl from the position shown in Fig. 7, the direction of ratcheting will be reversed.

The

gears

31, 32 are in mesh with the

pinion

16, 17, but it the sleeve 23 is shifted longitudinally so as to withdraw one bolt from its pinion, and permit engagement of the other bolt, then the spindle 13 will be rotated at a speed according to which one of the

bolts

20 or 21 is projected. By shitting the slide 26 to an intermediate position, both of the bolts will be projected sufliciently so that both pinions are locked to the bolt-carrying hub 18 and results in locking the spindle so that the chuck can be conveniently opened and closed for substitution of tools. This locking of the spindle is due to the fact that it both

pinions

16 and 17 are locked to the spindle through the medium of the clutch hub and its bolts, the engagement of the two

gears

31, 32 with the two pinions, will necessarily effect this locking, because of the different sizes of the two

gears

31, 32.

1. An implement of the character described, having a shaft or spindle to be driven at either one of two speeds, a compound gear having two circular series of teeth, two pinions loosely mounted on said spindle and engaging the two series of teeth of the gear at the same side of the aXis tl ereoit, a hub directly secured to the spindle between said two pinions, independently movable spring-projected bolts carried by said hub to selectively engage the pistons, and means for selectively rendering said bolts alternately operative and inoperative in relation to said pinions.

2. An implement of the character described, having a shaft or spindle to be driven at either one of two speeds, two pinions loosely mounted on said spindle, a hub ecured to the spindle between the pinions and bolts therein adapted to operativelyengage the pinions, a compound gear engaging both pinions, and means for shifting said bolts to alternately engage them with said pinions, or to simultaneously engage them with both pinions to lock the gearing.

3. An implement of the character described, having a shaft or spindle tobe driven at either one of two speeds, two pinions loosely mounted'on said spindle, a hub secured to the spindle between the pinions and independent spring actuated bolts therein adapted to operatively engage the pinions, a compound gear engaging both pinions, and a longitudinally adjustable sleeve for shifting said bolts to alternately render them operative and inoperative in relation to said pinions.

4. In change speed gearing, the combination with a shaft or spindle, of two pinions loose thereon, a hub secured to the spindle and a plurality of independently movable devices therein to engage the pinions, a compound gear engaging both pinions, and a longitudinally adjustable sleeve having lost motion connection with said movable devices to shift the latter to cause the hub to be locked to either pinion.

5. In change speed gearing, the combination with a shaft or spindle, of two pinions loose thereon, a hub secured to the spindle between the pinions and having a plurality of longitudinal sockets, spring actuated bolts in said sockets, a compound gear meshing with both pinions, and av longitudinally adjustable sleeve having lost motion connections with said bolts.

6. In change speed gearing, the combination with a shaft or spindle, of two pinions loose thereon, a hub secured to the spindle between the pinions and having a plurality of longitudinal sockets, spril'ig actuated belts in said sockets, a compound gear meshing with both pinions, and means for con trolling the positions of said bol ts longitudinally of their sockets, said means comprising a sleeve having pins engaging the bolts, said sleeve being longitudinally adjustable.

7. In change speed gearing, the combination with a shaft or spindle, of two pinions loose thereon, a hub secured to the spindle between the pinions and having a plurality of longitudinal sockets, spring actuated bolts in said sockets, a compound gear meshing with both pinions, and means for controlling the p sitions of said bolts lmigitudinally ol their sockets, said means coi'nprising a sleeve longitudinally shit'table on said hub and having inwardly projecting pins, the bolts having elongated recesses into which the pins project.

8. In change speed gearing, the combination with a shaft or spindle, ol. two pinions loose thereon, a hub secured to the spindle between the pinions and having a plurality of longitudinal sockets, spring actuated bolts in said sockets, a compound gear meshing with both pinions, and means for controlling the positions o'l? said bolts longitudinally of their sockets, said means comprising a sleeve longitudinally shi'ltable on said hub and having inwardly projecting pins, the bolts having elongated recesses into which the pins project, the sleeve having an external annular groove, a slide having a pin entering the groove of the sleeve, and means tor holding said slide in either one of a plurality of positions.

t). In change speed gearing, the combination with a shaft or spindle, ol two pinions loose. thereon, a hub secured to the spindle and a plurality of indepemlently movable devices therein to engage the pinions, a compound gear engaging both pinions, means for controlling said movable devices to cause the hub to be locked to either pinion, a tank, and ratcheting connections between said crank and compound gear.

10. In change speed gearing, the combination with a shaft or spindle, of two pinions loose thereon, a hub St(7ltl'0tl to the spindle and a plurality of independently movable devices therein to engage the pinions, a

compound gair engaging both pinions, means for controlling said movable devices to cause the hub to be locked to either pinion, a crank, and ratcheting connections between said crank and compound gear, said connections comprising a reversible pawl carried by the crank, the gear being provided with a circular series o'lf recesses to cooperate with said pawl.

l1. An in'iplemcnt oi the (2l]tl]{t(2l;(.l described, comprising a gear having a circular series of recesses, a crank having a reversible pawl to ctioperale with said recesses, means for holding the pawl in an intermediate position to positively lock the crank and gear together, a spindle, and connections between the spindle and gear lor rotating lhespindle.

12. An implement ot the character described, comprising a gear having a circular series of recesses, a crank having a tubular bearing, a rotatably adjustabli spring-actie ated pawl in said latring, and operative (amnections between the spindle and gear.

'13. An implement olf the character described having a. spindle, gearing including a pair of pinions loose on the spindle, a hub secured to the spindle between the pinions and having iiidependently movable springprojiarlcd members mounted to move longitudinally lhercot toward and From the pinions, said pinions having opposing l'aces formed to be engaged by the ends of said longitudinally movable members, arch of the members being movable to engage with but one ol the two pinions, and means for selectively withholding .aid members 'l'rom engagement with one or the other of the pinions.

i l. in mechanism at the character described, the combination with a spindle at high and low speed gearing including a pair at pinions loose on the spindle, said pinions having opposing ratchet teeth, and a barrel secured to said spindle between the pinions aml having longitiulinally movrble pawls, means being provided lor selectively remlering said pawls active or inactive.

ln testimony whereol' l have allixcd my signature, in presence oi two witnesses.

JOHN A. LELAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G.