US1521761A - Drill sharpener - Google Patents

Description

J. DWSON DRILL SHARPENR Filed Sept. 5. 92l Sa'ShwcS-Sheet 2 HIS AT f! v Jan, 6. 1925. @51,71

' '.J. DITSQN DRILL SHARPENER me@ sept. s, 1921 s--shmsshet :y

INVENTOR vsgeg'wm Patented dan.` 6, 1925.

UNITED STATES JESSE DITSON, 0F LITTLETON, COLORADO,

PATENT: OFFICE.

ASSIGNOR T0 ING-ERSOLL-RAND COMPANY,

0F JERSEY CITY, NEW JERSEY, A CORPORATION 0F NEW JERSEY.

DRILL sHaRrENER. ,1

Application led September To all 'whom t may concern.'

Be it known that I, JESSE 4DrrsoN, a citizen of the United States, a resident of Littleton, county of Arapahoe, and State of Colorado, havev invented 'a certain Drill Sharpener, of which the following is a speciication, accompanied by drawings.,

This invention relates to drill Sharpeners 4of the self contained type, having a vertically movable fluid actuated cross head which carries the upper half of the dies and other accessories, the lower cooperating half of said dies and accessories being'oarried upon the main cylinder frame.

The objects of the invention are toimprove upon and simplify the construction of such machines, permit the piston for the cross head to be operated upwardly by constant pressure maintained in the base of the machine as a pressure reservoir, so that no air is consumed on the raising stroke, enable all the sharpening operations to be controlled .by a single throttle valveand inanually actuated lever, and produce ample clamping pressure without excessive shock to the machine. f

Further objects of the invention will here inafter appear and to `all of these ends the invention consists ofthe features of construction; arrangement' of parts and combinations of elements, substantially as hereinafter fully described and claimedin this specification, and shown in the accompany ino drawings, in which igure 1 is a longitudinal sectional elevation'of a drill Sharpener.

Figure Qfis a detail longitudinal sectional elevation partly broken away of that portion Aof the machine includin the throttle valve chest showing the thrott e'valve in another position,

Figure 3 is a det-ail vertical sectional elevation through the throttle valve chest at right angles to the view shown in Figure 1v with the valve in still another position,

Figure 4 is a' side elevation partly 'in longitudinal section of the machine taken at right angles to Fig-ure 1. y

Figure 5 is a detail longitudinal sectional elevation through the hammer cylinder 'showing the hammer in a diii'erent position fro that indicated in Figure 4:.

l e 6 is a side elevation ,partly in longitudinal section on the line 6-6 of Figureb?, the view being taken from the same s, 1921. serial No. 498,212.

'side of the machine as that shown in Figure 4, and

Figure 7 is a partial top plan view of Fiv'ure 6.

tReferring to the drawings, the machine comprises the base A` having a main cylinder frame B suitably secured thereto as by means of the studs C' and nuts D. A cross head rod E is movable vertically in the main cylinder frame B and carries a cross head F at its upper end and a piston Gr at its lower end, operatin in the cylinder bore H. The piston G has lie reduced extension J sleeved over the reduced end K of the cross head` rod E and `suitably securedto the rod E by means of the nut L and locking key O. The C raising stroke. No air is admitted within l K the large cylinder bore H beneath the piston head G for the raising stroke, but said space is open to atmosphere andmeans are provided for cushioning the downwardl stroke of the piston when live air is admitted above the main pistonhe'ad G for the downward stroke. The distribution of motive Huid from the hollow base or constant pressure reservoir for the operation`of'the machine, iscontrolled by a throttle valve S movable in the valve chest T andL controlled -by the manually operated handle U.

The provision of a constant pressure reservoir of motive Huid within the hollow base -A enables me touse a comparatively long and small supply pipe connected to the inlet R of the reservoir. In operation, a cylinder ,of comparatively large size maybe supplied in a rapid manner fromthe reservoir in the base without a substantial drop in pressure.` The reservoir is connected by a passage V in the main cylinder casing to al'port 4in the valve chest T which opens directly into the cylinder above the piston G when the vconi ing stroke and no air is consumed o-n sa-id stroke, the construction of the throttle valve S and throttle valve chest T is much simplied.

The throttle valve Sis provided with the heads-W and X connected by the stem Y, and a bell crank Z pivoted at one end to the throttle valve by means of the pin a and connected at the other end to the hand lever shaft I), enables the throttle valve to be raised and lowered by rocking the lever U. The lever U may be clamped to the shaft b as by means of thesplit socket c and bolt d.

When the valve lever U is in central or neutral position, as indicated in F igurel which is the position l"indicated in dotted lines in Figure 3, the valve` head-VV closes communication between the supply passage Y from the reservoir in the base, and t e space above the piston head G is open to atmosphere/through the passage e communieating with the valve chest and thence around the stem Y of the valve to the small port j' and then through the passage g in the wall oi the valve chest toY the port h communicating with the exhaust pipe j. The space beneath. the piston head G is also open to atmosphere through the 'passage k communicating with the valve chest, and the passage g. The piston G is in its uppermost position due to the constant pressure on the smaller pressure area constituted by the lower end of the piston shank and cross head rod within the cdnstant pressure reservoir.

Movement of the operating handle U from the neutral position to the position indicated in full lines at 2 in Figure 3, admits live air above the main piston head G to carry the piston and cross head downwardly, but in passing from position 1 to position 2 indicated in Figure 3, the handle U passes through the intermediate position 1a indicated in detail in Figure 2. In Figure 2, thc valve has been moved upwardly a suieient distance to open communication between the passage V and the the stem Y of the valve, so that motive Huid passes above the piston head G and forces the piston downwardly. The descent and blow of the piston G ris cushioned, owing to the fact that the exhaust from beneath the piston head G passing out through the passage is and the small passage g in the wall of the valve chest T, is throttled at this point in the movement of the valve]A Continued movement of the handlever U to the second position indicated in Figure 3, raises the valve suficientlyto permit the exhaust from beneath the piston head G to pass out directly underneath the valve head X to atmosphere through the exhaust pipe j, instead of through the throttling passage g.

Continued movement of the valve handle U to the third position as indicated in Fig` passage e, past ure 4, which is the piston shown in dotted lines at 3 in Figure 3, moves the valve S upwardly still further and admits live air from the passage V" around the valve stem Y to a `supply passage o in the frame of the 7) machine leading to the hammer cylinder p for actuating the dolly g, which is shown in Figures 4 and 5 operating upon the drill steel 1 held within the dies s, carried by the cross head F and the main cylinder frame B respectively. y

The hammer cylinder p may /be mounted on the main cylinder frame B, as by means of the clamping plates t and bolts u. The

hammer cylinder p is provided lwith a back head 'v and a front head w, which front head forms .a guide for the dolly g, and a ring or bushing m is inserted within the cylinder rearwardly of the front head fw. The

parte of the hammer cylinder are held together by the usual side bolts y having springs .e and nuts 6. The hammer piston 7 is preferably of the valvele'ss type, andthe arrows in Figures 4 and 5 sufficiently indicate the distribution of motive fluid for 99 actuating a hammer and operating the dolly when the valve lever U is in the position indicated. in Figure 4. The usual dolly spring 8 is provided for the dolly.

By reversing the rocking movement of the valve lever U and returning said lever' from position 3 through position 2 and la to the neutral position l, all as indicated in Figure 3, the cylinder bore H above the piston head Gl will be exhausted to atmosm0 phere and the constant pressure on the reduced shank of the piston will raise the cross head F to the position indicated in Figure l.

By rocking the valve handle U backm5 wardly to the position indicated in full lines in Figure 6, and in dotted lines indicated at 4 in Figure 3, an arm 9 on the valve lever U will bear upon and force downwardly the valve stem 10 of a spring pressed blow 110 valve l1 which is normally held to its seat 12 by the` spring 13 and live air will be admitted fromvthe valve chest T t0 a pas- .sage 14,1eading to a blow head 15 having downwardly directed apertures 16 which 115 direct the air blast upon lthe dies s to clean them for the next operation.

l claim: j

1. In a drill Sharpener, the combination of a hollow base maintained under substantently supplying motive Huid from the base m30 tothe cylinder bore above the piston head for actuating the cross head and rod downwardly, the under side of said piston head being open 'only to atmosphere, and means for thro'ttling` the escape of air from beneath the piston head on the downward 'stroke to cushion the piston head.

2.l In a drill Sharpener, the combination of a hollow base constituting. a pressure reservoir, means for maintaining. motive fluid under constant pressure 1n said reservoir, a main cylinder frame mounted onV said base, a cross head` rod movable vertically in said cylinder frame Aand extending into the base, the lowerfend of the cross head rod being thereby subjected to constant Huid pressure tending to raise it, a cross head on said rod, a piston head in vsaid rod. reciprocating in the bore of the cylinder frame, and means for supplying motive fluid from the base reservoir to actuate the pistonhead downwardly, while atA the same time maintaining the under side of the piston head open only; to atmosphere.

3. In a drill Sharpener, the combination lof a hollow base, constituting a pressure reservoir, means for maintainingmotive fluid under constant pressure in said reser-l voir, a main cylinder frame mounted o n said base, a cross head rod movable vertically in said` cylinder frame and extending into the base, the lower end of the cross.

head rod being thereby subjected to constant fluid pressure tending to raise it, across head on said rod, a piston head in said rod reciprocating in the bore of the cylinder frame, means for supplying motive fluid from the base reservoir to actuate the piston head downwardly while at thev same time maintaining the under side of the piston head open only to atmosphere, including means for throttling the escape of air from beneath the piston head on the downward stroke for cushioning the piston head` 4. In a drill Sharpener, the combination v4of a base, a main cylinder ,frame mounted on said base, a lu'id vactuated cross head rod movable vertically in said cylinder. frame, a cross head carried by said rod, co-

operating dies carried by the; cross head vand cylinder frame, a blow head located on the cylinder frame adjacent said dies, and

a throttle valve Jfor controlling the distribu tion of fluid pressure in the machine incluling the supply of Huid to the said blow hea of a base, 'a'main' cylinder frame mounted 5. In a'drill Sharpener, the combination,

on said base, a fluid actuated cross head rod movable vertically in said cylinder vran'ie, a cross head -carr1ed by /said vrod, cooperating dies carried by the cross'head and cylin e r frame, a blow head' located on thev cylinder frame adjacent said dies, a throttle valve fop` controlling the distribution head valve 'adjacent said throttle valve, and means for opening the blow head valve to lsupply fluid pressure'to the blow head when said throttle valvelis moved to agiven position. l J 6. In a drillsharp'ener, the'combination of a base, a-main cyl-inder frame mounted on said base, Aa fluid actuated cross head rod movable vertically in said cylinder frame, a cross head carried by said rod, a' fluid actuated hammer mounted /on the cylinder frame, a fluid supply passage in the cylinder frame leadingl tothe said hammer, a valve chest on the cylinder frame and a throttle valve in'said chest for controlling the'distribution of motive Huid for actuating the cross head and for controlling said Isupply passageleading to the hammer. v

7. In a drill Sharpener, the combination with Va hollowbaseforming a motive iuid reservoir, a main cylinder frame mounted on said base having a smaller cylinder openi ingl into said reservoir, a cross head rod movable vertically in said cylinder frame and constantly subjected to the pressure in the base tending to move the rod in one direction, a cross head and a piston head carried by said rod and means for supplying motive fluid to the piston for movinghead Ycarried by-said rod, a piston head onn said rod operating in the larger bore of said main cylinder frame and means 4for intermittently supplying motive fluidv to the larger ,cylinder bore above the piston headv lCf) for actuating thecross head rod rand` crossv I head downwardly.

. 9. In adrill sharpener,'the combination'.

of' a hollow base forminga motive fluid reservoir, a main 'cylinderA frame mounted on said base having a large c linder bore and a small cylinderbore eX ending'into said reservoir, a cross head 'rod movable vertically inthe Asn'ia'ller bore of said cylinder frame and constantly, subjected tothe pressurein the,v reservoir tending to move thel rod 1n one direction, .a cross head, a piston head carried by the -rod and `operating in the larger bore Vofthe cylinder frame, means. for supplying motive fluid to: the pistonl for lmoving the-cross head vrod and cross head in the opposite direction and means for 'l cushioning the'piston head Vwithin the 'larger bore ofthe cylinder frame as thepiston head reaches the end of its stroke in said opposite direction.

10. In a drill Sharpener, the combination of a hollow base forming a motive fluid reservoir, -a main .cylinder frame mounted on said base having a large cylinder bore and a small cylinder bore extending into said reservoir, a cross head rod movable vertically in said smaller bore and constantly subjected to the pressure in the reservoir tending to move the rod upwardly, a cross head carried by the rod, a piston head on said rod operating in the larger bore of the cylinder frame, meansfor intermittently supplying motive fluid to the large cylinderabove the piston head for actuating the cross headkrod and cross head downwardly and means for cushioning the piston head within the cylinder frame as the piston reaches the end of its downward stroke. f

11. In a drill Sharpener, the combination of a hollow. baseforming a motive fluid reservoir, a main cylinder frame mounted on said base and having a large cylinder bore and a small cylinder-bore extending into said reservoir, a cross head rod movable vertically 1n said smaller bore and constantly subjected to the pressure in the reservoir tending to move the rod upwardly, a cross head carried by the rod, a piston head on the rod operating in the larger bore of the main cylinder frame, means for intermittently supplying motive fluid to the larger bore above the pistonfhead for actuating' the cross head rod and cross head piston downwardly and means for throttling the escape of air from beneath the piston head for cushioning the stroke as the piston reaches the end of its downward stroke.

12. In a drill Sharpener, the combination of a hollow base forming a motive fluid reservoir,` a frameon said base having a large cylmder bore and a small bore extending into said reservoir, a cross head and a vertically movable cross head rod operating in the smaller bore and constantly subjected to the pressure in the reservoir for moving the cross head and rod upwardly.

13. In a drill Sharpener, the combination of a .hollow base forming a motive fluid reservoir, a mainv cylinderframe on said base having a large bore and a small bore extending into said reservoir, a cross head; a vertically movable cross head rod operating in the smaller bore and constantly sub- L jected to lthe -pressure in the reservoir for moving the cross head and rod upwardly and means for controlling the supply of motive Huid from said reservoir for actuating the cross head and rod downwardly.

In a drill Sharpener, the combination of hollow base forming ervoir' 'under substantially constant pres- Areservoirto t a motive Huid ressure, a main-.cylinder frame having a large, bore and a relatively smaller bore extending into said reservoir, a cross head, a vertically movable cross head rod operating in the smaller boreand constantly subjected to the pressure in the base for moving the cross head and rod upwardly, means for supplying motive fluid yfrom the reservoir for actuating the cross head and rod downwardly and means for cushioning the downward stroke of the cross head.

l5. In a drill Sharpener, the combination of a hollow base forming a motive fluid reservoir under substantially constant pressure, a main cylinder frame on said base having a main bore and a relatively smaller bore extending into said reservoir, a cross head, a vertically movable cross head rod operating in said smaller bore and constantly subjected to the vpressure in the reservoir for moving the cross head and rod upwardly, a piston head on said cross head rod operating in the larger'bore and means for sup-y plying motive uid from the reservoir for actuatingthe piston head and rod downwardly.

16. In a drill Sharpener the combination of a hollow base forming a motive fluid reservoir under substantially constant luid pressure, a main cylinder frame on said base having a large bore and a relatively smaller bore extending into the reservoir, a vertically movable cross head rod constantly subjected to the pressure in the reservoir for moving the cross head and rod upwardly, a piston head on said cross head rod operating in the larger bore, means for supplying motive fluid from the reservoir 'for actuating the piston head and rod downwardly and means for throttling the escape of air from beneath the piston head on the downward strokfe to cushion the piston head.

17. In a drill Sharpener, the combination of a: hollow `base forming a motive fluid reservoir under substantially constant fluid pressure, a main cylinder frame mounted on said base having a large bore and a relatively smaller bore extending into the reservoir, a cross head rod movable vertically in the smaller bore and .constantly subjected to the pressure in the reservoir tending to move the rodin `one direction, a cross head on said rod and a piston headl carried by the rod for operating in the largerbore, a valve chestmounted on the cylinder frame mittently supplying-motive fluid from the j e larger bore abovethe piston head for actuating the cross head and rod downwardly.

onywh'ereof I have signed this i2() and a throttle valve in said chest' for interr

Images