US1219477A - Drill-sharpener. - Google Patents

Description

E. L. OLDHAM.

DRILLSHARPENER. APPLICATION FILED APR-5. 1915.

Patented Mar. 20; 1917.

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E. L. OLDHAM.

DRILL SHARPENER.

APPLICATION FILED APR. 5. 1915.

Patented Mar. 20, 1917.

9 SHEETSSHEET 2.

PN01D-LIYMU WASHING mu. 0 c.

E. L. OLDHAM.

DRILL SHARPENER.

APPLICATION FILED mm. 1915.

Patented Mar. 20, 1917..

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E. L. OLDHAM.

DRILL SHARPENER.

APPLICATION FILED APR. 5, 1915.

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DRILL SHARPENER.

APPLICATION FILED APR.5,1915.

Patented Mar. 20, 1917.

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JNKTED STATESJPATENT @FFEQE.

EDWARD L. OLDHAM, F DENVER, COLORADO, ASSIGNOR TO THE DENVER ROCK DRILL MANUFACTURING COMPANY, OF DENVER, COLORADO, A CORPORATION OF DELA- WARE.

' DRILL-SHARPENER.

Specification of Letters Patent.

Patented Mar. 20, 1917.

Application filed April 5, 1915.. Serial No. 19,315.

ject is to provide a mechanism which is S1II1- ple and effective in its character, and which is convenient to operate, leaving the hands of the workman free to manipulate the tool being sharpened, and is furthermore economical in the amount of motive fluid utilized, provision being made for re-using a portion of the motive fluid in the successive operations of the machine.

In the drawings Figure 1 is a side elevation of a machine embodying the present improvements.

. Fig. 2 is a sectional view therethrough at,

right angles to Fig. 1.

Fig. 3 is a plan view of the base or bed of the machine.

Fig. 1 is a rear elevation,partly in sec tion.

Fig. 5 is a view that is diagrammatic in its character, illustrating the controlling valve and its connection with the apparatus.

Fig. (Sis a longitudinal sectional view on an enlarged scale through the valve, showing it in its normal position when the machine is inactive.

Fig. 7 is a similar view taken at right angles to Fig. 6.

Figs. 8, 9 and 10 are views similar to Fig. 8, but showing the valve respectively in different operative positions.

Fig. 11 is a detail sectional view through the dies and the holding means therefor.

Fig. 12 is a front elevation of the structure shown in Fig. 11.

Fig. 13 is a rear elevation of the same.

Fig. 14 is a cross sectional view on the line 14-14c of Fig. 11, and

Fig. 15 is a detail sectional view illustrating the pipe connections with the cylinder member of the die operating means.

Similar reference numerals designate corresponding parts in all the figures of the drawings.

In the embodiment disclosed, a base 16 is through the flange into the base.

employed having a flange or foot 17 and being substantially hollow, thelowerportion 18 being tubular in form, the upper portion comprising spaced side walls 19, leaving opposite side openings which are closed by suitable sliding doors 20. A jaw member 21 is rigidly supported upon the side walls 19, and cooperating therewith is an upper movable jaw member 22. These members 21 and 22 carry coacting dies 28 for holding the tool to be operated on.

The jaw member 22 is rigidly fixed to a pair of vertically reciprocating rods 21 that slidably pass through the lower jaw member 21 and have reduced lower ends 25 slidably mounted in sockets 26 formed in the tubular portion 18 of the base. These side rods are also connected by a cross head. 27 located just above the said tubular portion 18 of the base, the cross head being held in place by suitable jam nuts 28 threaded on the rods beneath the cross head, said cross head being abutted against annular shoulders 29 formed upon the said rods.

For the purpose of moving or reciprocating the upper jaw member 22 the following mechanism is employed: A cylinder member 30 is located in the tubular portion 18 of the base, being provided at its lower end with an outstanding flange 31 that rests against an under-cut shoulder 32 formed in said base, the cylinder member being held in place by bolts 38, or other devices passing In this cylinder member is located a reciprocatory piston 81, to which is attached a piston rod 35 extending upwardly through the upper cylinder head to a point between the side rods 24, and below the fixed jaw member 21. Two sets of toggle links 36 are disposed be tween the rods 24, the upper ends of the sets being suitably pivoted as shown at 37 to the side walls 19 of the base,, their lower ends in like manner having pivotal connections 38 with the cross head 27. The central pivots 39 of said sets are pivotally connected to the ends of a third set of toggle links 40, which links have their central portions pivoted as shown at 4:1 to the upper end of the piston rod 35. It will thus be evident that if the piston 34. rises, the toggle 10 will be broken, or in other words, the links will be caused to assume an acute angular relation. This will draw the links of the toggle 36 into acute angular relation, so that the cross head 27 and consequently the side rods 2d and the upper aw member 22 will be elevated, opening the jaws. On the other hand, if the piston is depressed, all the sets of toggle links will be straightened, thereby causing the downward movement of the cross head 27, side rods 24 and the jaw member 22.

As shown more particularly in Figs. 11-14 inclusive, means are provided for securing the dies 23 to the jaw members 21 and 22. Each of said jaw members is provided with a substantially semi-circular recess 42 that is enlarged at one end, as shown at 43, the shoulder between the two portions a2 and &3 being undercut, as illustrated at 1 i. Each die has a shank portion 45 fitting in the recess 4:2, and a head portion 66 that fits in the enlarged portion 13. The rear end of the head portion 16 has an undercut shoulder 17 interfitting with the undercut shoulder i l of the jaw member. It will thus be evident that this end of the die will be effectively held in its recess, as long as the die is secured against longitudinal displacement. To prevent, such displacement, a cap plate 48 is fitted upon the opposite end of the die, being secured in place by a headed screw 49, said cap plate overlapping the adjacent face of the jaw member and being held against turning by a pin 50 detachably engaged therein and carried by said jaw member. lVith this construction, it will be evident that the dies may be readily removed and replaced, but when in position, are effectively held against accidental detachment.

Projecting from the rear side wall 19 of the base is a platform 51, which in turn supports an upwardly and rearwardly extending bracket 52. On the platform is mounted a horizontally slidable dolly carrier 53 having a plurality of dollies 5 1, any one of which can be brought into cooperative relation with the dies 23. The carrier is held in its different positions by a plunger latch 55 that is mounted in the platform 51 and engages in any one of a plurality of suitable sockets formed in the bottom of the carrier. The plunger 55 is suitably operated by a hand lever 56.

The bracket 52 supports a fluid operated hammer 57, which may be of any desired structure, and it is believed needs no minute description. This hammer is alined with :the dies 23, and consequently any dolly 5a presented to said dies is in position to be operated on by the hammer in a manner well understood.

There will now be described the means for controlling the operation of the dies and of the hammer, and for this purpose, attention is particularly called to Figs. 510 inclusive. A valve casing 58 is mounted on the rear portion of the base, as shown particularly in Fig. 4, and is provided with an in ternal valve chamber designated generally by the reference numeral 59. This chamber has a plurality of annular grooves or pockets which are designated respectively 60, 61, 62, 63, 64, 65, 66, 67 and 68, said pockets being spaced apart. A motive fluid supply pipe 69 communicates with the groove 63, this supply pipe leading from any suitable source of fluid under pressure, preferably air. Another pipe 70 leads to the bottom of the cylinder member 30, and has communication by means of a passageway 71 with the bottom groove 66 and the top groove 68. Another pipe 7 2 communicates with the upper end of the cylinder member 30 above the piston 34, and has communication with the grooves 61 and 66 by means of a connecting passageway 73. A third pipe 74 leads to the hammer cylinder 57 and is in communication with the groove 65, while an exhaust pipe or port 75 leads from the groove 67.

Operating in the valve chamber 59 of the valve casing. 58 is a reciprocatory piston valve composed of a series of heads, respectively designated 76, 77, 78, and 79, these heads being spaced apart and connected by neck portions 80, 81 and 82. The valve furthermore has a stem 83 projecting downwardly from the lower valve casing head 84, and said head is provided with a spring pressed holding plunger 85 that is movable into and out of either of a pair of grooves 86 formed in said valve stem.

The valve casing, as shown more particularly in Fig. 4 is mounted upon the rear portion of the base, and the lower end of the valve stem rests upon the rear end of a foot treadle 87 fulcrumed between its ends, as shown at 88, on one side of said base. This valve stem is surrounded by a coiled spring 89, the upper end of which bears against the lower head 8d of the valve casing 58, the lower end resting upon a collar secured to said valve stem. It will be evident that the spring 89 urges the valve to its lowermost or normal position.

The statement of the operation of this mechanism may be premised by saying that these machines have heretofore required a relatively great amount of air to operate the same, pistons of large area having been employed. In the present structure, it will be evident that the die operating cylinder is of relatively small diameter, and a further saving is efiected in bypassing the air from one side of the piston to the other. Referring now to Figs. 510 inclusive, Figs. 5, 6 and 7 show the valve in its lowermost or normal position when the machine is inactive. It will be evident that Fig. 5 is a diagrammatic view, the ports being shown as diametrically opposite in order that all may be illustrated. In this position, the

' supply of motive fluid from the pipe 69 can pass from the groove (38 into the groove 62, and thence through the passageway 71 to the pipe 70, so that the piston 8 L will be elevated. and the dies will be opened. In this position, it will also be noted that the upper portion of the'cylinder member 30 above the piston 8 1 is open to the exhaust, inasmuch as the pipe 72 has communication through the passageway 78 with the groove 66, and this groove is in communication with the groove 67 which communicates with the exhaust pipe 75.

If new a tool. is inserted between the dies and the treadle is pressed downwardly the valve will be elevated and the first position it will assume is that illustrated in Fig. 8. In this position, it will be seen that the exhaust from the upper end of the cylinder member 30 above the piston 3% will be closed by the head 7 8 which has moved across the groove 66, and thus cut off communication betw en said groove and the exhaust groove 67. At the same time, the head 77 has moved upwardly far enough to close the groove 62, so that the supply of motive fluid from the pipe 69 cannot now pass through said groove 62, the passageway 71 and the pipe to the lower end of the cylinder member, but with the closure of the supply and exhaust, as above described, there isv opened a bypass between the lower portion of the cylinder vmember below the piston, and the upper portion of the cylinder member above the piston. This by-pass may be traced as follows :through the pipe 70, the passage 71, the groove 60, groove 61, passageway 7 S and pipe 72. It will thus be seen that the motive fluid compressed below the piston will expand into the cylinder member above the piston and consequently a portion of the fluid employed for elevatin the 11 Joel die and holdin it elevatedr: J. o

is utilized in depressing said die. A continued upward movement of the valve moves it to the position shown in Fig. 9, in which the motive fluid supply from the pipe 69 now enters the upper end of the cylinder member above the piston 34 by way of the groove 63, groove (it, passageway 73, and pipe 72. At the same time, the exhaust is brought intocommunication with the lower end of the cylinder member 30 below the piston 34, inasmuch as the exhaust groove 67 is now in communication with the groove 68 that communicates by means of the passageway 71 with the pipe 70. The result is that the piston will be moved downwardly with force and the tool will be gripped in the dies. A still further upward movement of the valve maintains these relations of the ports, but in addition, as shown in Fig. 10, it brings the groove 65 into communication with the supply groove 63, and as said groove 65 is connected with the hammer cylinder 57 by the pipe 7 t, the hammer will finally be thrown into operation. Upon the release of the'i'oot treadle, a reverse action to that above describedwill take place.

It will thus be seen that with this structure a material saving in motive fluid is effected, the operation of the machine is controlled by a foot treadle, and both hands of the operator are thus free to conveniently manipulate the work.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art will out further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction may be resorted to without d'eparting from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is:

1. In apparatus of the character set forth, the combination with coacting dies, of fluid actuating means for relatively moving the same, a fluid operated hammer, means for supplying fluid under pressure to the die moving means and to the hammer, and a reciprocatory piston valve controlling said supply to first eltect the operation of the dies and afterward the operation of the hammer when said piston valve is moved in one direction and first stopping the operation of the hammer and releasing the d'es when said piston valve is moved in an opposite direction, and means for reciproeating the piston valve.

2. In apparatus of the character set forth, the combination with coacting dies, of fluid actuating means for relatively moving them, comprising a cylinder member and a piston operating therein, means for supplying fluid under pressure to the cylinder member on both sides of the piston, and means for by-passing the fluid from one side to the other.

8. In apparatus of the character set forth, the combination with coacting dies, of fluid actuating means for relatively moving them, comprising a cylinder member and a piston operating therein, means for supplying fluid under pressure to the cylinder member on both sides of the piston, means for bypassing the fluid from one side to the other, and common mechanism for controlling the supply to both sides and to the by-pass means.

4. In apparatus of the character set forth, the combination with coacting dies, of fluid actuating means for relatively moving them,

- comprising a cylinder member and a piston operating therein, means for supplying fluid under pressure to the cylinder member on both sides of the piston, means for bypassing the fluid from one side to the other, and a common valve for controlling the supply to both sides of the piston and through the luv-passing means.

In apparatus of the character set forth, the combination with coacting dies, of fluid actuating means for relatively moving them, including a cylinder member and a piston operating therein, means for supplying fluid to one side of the piston, means forexhausting it from the other side, and means for bypassing the fluid from one side to the other side and simultaneously closing the exhaust therefrom and from the fluid supply means.

6. In apparatus of the character set forth, the combination with coacting dies, of fluid actuating means for relatively moving them, including a cylinder member and a piston pperating thei in, nreans for supplying i'luid to one side or tne piston, means for exhausting it from the other side, means for by-passing the fluid from one side to the other, and a common valve for controlling the by-pass and exhaust and closing the exhaust from the fluid supply means when the bypass is open.

7. In apparatus of the character set forth, the combination with eoacting dies, of fluid actuating means for relatively moving them, including a cylinder member and a piston operating therein, means for supplying fluid to one side of the piston, means for exhausting it from the other side, means for by-passing the fluid from one side to the other, and means for opening the fluid supply and exhaust and thereafter closing the supply and exhaust and opening the bypass while maintaining the supply and exha .st disconnected.

8. In apparatus of the character set forth, the combination with coacting dies, of fluid actuating means for relatively moving them, including a cylinder member and a piston operating therein, means for supplying fluid to one side of the piston, means for exhausting it from the other side, means for bypassing the fluid from one side to the other, and a valve for simultaneously opening the fluid supply and the exhaust and thereafter closing said supply and exhaust and opening the bypass While maintaining the supply'and exhaust disconnected from each other.

9. In apparatus of the character set forth, the combination with coacting dies, of fluid actuating means for relatively moving them, including a cylinder member and a piston operating therein, means for supplying mo tive fluid to opposite sides of the piston, means for eXhausing the motive fluid from opposite sides of the piston, a bypass for admitting motive fluid from one side of the piston to the other, and means for opening the motive fluid supply to one side of the piston and the exhaust from the other side, cutting oil both said supply and exhaust and opening the by-pass.

10. In apparatus of the character set forth, th combination with coacting dies, offluid actuatingmeans for relatively moving them, including a cylinder member and a piston operating ther in, means for supplying motive fluid to opposite sides of the pi on, means for exhausting the motive fluid from opposite sides of the piston, a by-pass for admitting motive fluid from one side of the piston to the other, and a valve for opening the motive fluid supply to one side of the piston and the exhaust from the other side, cutting off both said supply and exhaust and opening the by-pass.

11. In apparatus of the character set forth, the combination with coasting dies, of means for relatively moving the dies, comprising a cylinder member and a piston operating therein, means for supplying fluid under pressure to the cylinder member, means for by-passing the fluid from one side of the piston to the other side, a hammer, means for supplying motive fluid thereto, and means for successively controlling the supply of fluid to the cylinder member and the by-pass and the supply to the hammer.

12. In apparatus of the character set forth, the combination with eoacting dies, of means for relatively moving the dies, comprising a cylinder member and a piston. operating therein, means for supplying fluid under pressure to the cylinder member, means for lay-passing the fluid from one side of the piston to the other side, a hammer, means for supplying motive fluid thereto, and a valve for successively controlling the supply of fluid to the cylinder member, the by-pass, and the supply to the hammer.

13. In apparatus of the character set forth, the combination with coacting dies, of means for relatively moving the dies, comprising a cylinder member and a piston operating therein, means for supplying fluid under pressure to the cylinder member on opposite sides of the piston, means for bypassing the fluid from one side of the piston to the other side, a hammer, means for supplying motive fluid to the hammer, and means for successively controlling the supply of fluid to the cylinder member on one side of the piston, by-passing it to the other side, closing said by-pass, admitting fluid under pressure to said other side, and then admitting fluid to the hammer supply.

14:. In apparatus of the character set forth, the combination with eoacting dies, of means for relatively moving the dies, comprising a cylinder member and a piston operating therein, means for supplying fluid under pressure to the cylinder member on opposit sides of the piston, means for bypassing the fluid from one side of the piston to the other side, a hammer, means for supplying motive fluid to the hammer, and a valve for successively controlling the supply of fluid to the cylinner member on one side of the piston, by-passing it to the other side, closing said by-pass, admitting fluid under pressure to said other side, and then admit- 'ting fluid to the hammer supply.

In apparatus of the character set forth, the combination with coasting dies, of means for relatively moving the dies, comprising a cylinder member and a piston operating therein, means for supplying fluid under pressure to the cylinder member, means for exhausting it therefrom, means forbypassing the fluid from one side of the piston to the other side, a hammer, means for supplying motive fluid to the hammer, and means for opening the supply and the exhaust from the cylinder member and closing the by-pass, thereafter closing said supply and exhaust and opening the bypass, and afterward admitting motive fluid to the hammer supply means.

16. In apparatus of the character set forth, the combination with coacting dies, of means for relatively moving the dies, including a cylinder member and a piston operating therein,-means for supplying fluid under pressure to the cylinder member on both sides of the piston, means for exhausting fluid from the cylinder member on both sides of the piston, means for bypassing the fluid from one side of the piston to the opposite side, a hammer, means for supply ing motive fluid to the hammer, and means operating successively to admit fluid to the cylinder member on one side of the piston and simultaneously opening the exhaust on the opposite side, thereafter closing said supply and exhaust and opening the bypass, thereafter opening the supply to the opposite side of the piston and simultaneously opening the exhaust to the first-mentioned side, and finally admitting motive fluid to the hammer supply.

17. In apparatus of the character set forth, the combination with coacting dies, of means for relatively moving the dies, including a cylinder member and a piston op erating therein, means for supplying fluid under pressure to the cylinder member on both sides of the piston, means for exhausting fluid from the cylinder member on both sides of the piston, means for bypassing the fluid from one side of the piston to the opposite side, a hammer, means for supplying motive fluid to the hammer, and a valve op erating successively to admit fluid to the cylinder member on one side of the piston and simultaneously opening the exhaust on the opposite side. thereafter closing said supply and exhaust and opening the by-pass,

thereafter opening the supply to the opposite side of the piston and simultaneously opening the exhaust to the first-mentioned side, and finally admitting motive fluid to the hammer supply.

18. in apparatus of the character set forth, the combination with coacting dies, of means for relatively moving the same, including a cylinder member and a piston operating therein, a valve casing having a supply port and outlet ports communicating with the cylinder member on opposite sides of the piston, and a valve operating in the casing and controlling the ports to connect the supply port with either of the outlet ports and for bringing both of said outlet ports into communication with each other to bypass the fluid from one side of the piston to the other.

19. In apparatus of the character set forth, the combination with coacting dies, of means for relatively moving the same, including a cylinder member and a piston operating therein, a valve casing having a supply port, an exhaust port, and outlet ports con'nnunicating with the cylinder member on opposite sides of the piston, and a valve operating in the casing and controlling the ports to connect the supply port with either of the outlet ports and the other outlet port with the exhaust port and for bringing the outlet ports into communication with each other to by-pass the fluid from one side of the piston to the other and simultaneously closing the supply and ex haust ports to both outlet ports.

20. In apparatus of the character set forth, the comhination with coacting dies, of means for relatively moving the same including a cylinder member and a piston operating therein, a fluid operated hammer, a valve casing having a supply port, an outlet port communicating with the hammer, and other outlet ports communicating with the cylinder member on opposite sides of the piston, and a valve operating in the easing and controlling the ports to connect the supply port with either of the outlet ports to'the cylinder member, said valve also operating to bring the outlet ports into communication with each other and being movable to bring the outlet port and the ham mer into communication with the supply port.

21. In apparatus of the character set forth, the combination with coacting dies, of fluid operated means for relatively mov ing the same, a fluid operated hammer, a valve casing having a supply port and outlet ports respectively communicating with the die-moving means and hammer, a reciprocatory piston valve operating in the casing to cause the supply port to be first brought into communication with one outlet port, then ith the other outlet port and maintain simultaneous communication between the supply port and both outlet ports, and means for reciprocating the valve.

22. In apparatus of: the character set forth, the combination with coacting dies, of fluid operated means for relatively moving the same, a fluid operated hammer, a valve casing having a supply port and outlet ports respectively communicating with the diemoving means and hammer, a reciprocatory piston valve operating in the casing to first afford communication between the supply port and the outlet port leading to the die moving means, maintaining such communication and secondly affording commun1ca-, tion with the port leading to the hammer, and means connected to the valve for eflecting its reciprocation.

23. In apparatus of the character set forth, the combination with coacting dies, of fluid operated means for relatively moving the same, a fluid operated hammer, a valve casing having a plurality of internal chambers, a supply port communicating with one of the chambers, outlet ports from other of the chambers communicating respectively with the die moving means and the hammer, a reciprocatory piston valve operating in the valve casing and having means for successively connecting the supply chamber with the outlet chambers to first move the dies and thereafter set the hammer in operation, and means for reciprocating the piston valve.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EDWARD L. OLDHAM.

Witnesses:

F. L. EMERSON, A. H. SKAER.

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

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