US1559190A

US1559190A - Drill press

Info

Publication number: US1559190A
Application number: US683677A
Authority: US
Inventors: Cortis F Sherman
Original assignee: Henry & Wright Manufacturing Co
Current assignee: Henry & Wright Manufacturing Co
Priority date: 1923-12-31
Filing date: 1923-12-31
Publication date: 1925-10-27
Anticipated expiration: 1942-10-27

Description

C. F. SHERMAN DRILL PRESS Filed Dec. 61, 1923 s sheets-sheet 1 Oct. 27, 1925. 1,559,190

C. F. SHERMAN DRILL PRESS Filed Dec. 1923 3 Sheets-Sheet 2 Oct. 27, 1925- c. F. SHERMAN DRILL PRESS Filed Dec. 31. 1923 3 Sheets-Sheet 5 UNITED STATE PATENT OF FICE.

CORTIS r. sHERMAN, or HARTFORD, CONNECTICUT, ASSIGNOR To THE HENRY & WRIGHT MANUFACTURING COMPANY, or-HAR FoRD, CONNECTICUT, A CORPORA;

TION OF CONNECTICUT.

DRILL PRESS.

Application filed December 31, 1923 Serial No. 683,677.

To all whom it may concern:

Be it known that I, CoRTIs F. SHERMAN,

a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented a new and useful Improvement in Drill Presses, of which the following is a specification.

This invention relates to drilling machines which haveone or a plurality ofrotatable spindles that are fed longitudinally down and up with relation to the work.

The object of the invention is to provide a drilling machine of this character with simple and conveniently manipulated mechanism which can be quickly set so that the spindle or spindles may be fed down by hand, or can be set so that the spindle or spindles will be fed by power semi-automatically, that is, down and up and then stop, or. can be set so that the spindle or spindles will have a full automatic feed, that is, a down and up movement continuously until the machine is stopped. 1

In the accompanying drawings Figure 1 shows a side elevation of the upper part of a drill press provided with feed mechanism which embodies the invention. Fig. 2shows on larger scale a side elevation, with parts broken away, of the feed adjusting and controlling mechanisms. Fig. 3 shows a vertical section on the plane indicated by the dotted line 33 on Fig. 2. Fig. 4 shows a vertical section on the plane indicated by the dotted line l--it on Fig. 1. Fig. 5 is ade: tail section on the planeindicaited by the dotted line 5 section onthe plane indicated by the dotted line 6-6 on Fig. 2. p f

The tool spindle 1 is rotatably mounted in and has a longitudinal reciprocation with the spindle feed sleeve 2 that is supported by the bracket 3 attached to the front of the pillar a in a common manner. The upper end of the spindle has a longitudinal reciprocation through but is rotatable with the spindle-drive sleeve 5 that is mounted in a bearing arm 6 at the topof the pillar in the usual way. On the upper end of the drive sleeve is the spindlerotating pulley 7 which is connected by a belt 8 with a pulley 9 attached to the upper end of the verticaldrive shaft 10 mounted at the back of the pillar. A belt tightener 11 is arranged at the top of the pillar to regulate the tension of the belt.

5 on Fig. 2. Fig. 6 is adetail Attached to the back ofthe spindle feed sleeve 'isa rack 12 and meshing with this rack is a pinion 18 on an arbor 14 that extends horiZontally back of the rack and is journalled in the bracket 8. Atone end this arbor; is provided with a hand rod 15 which may be turned so as'to rotate the pinion and through the'rack and feed sleeve, feed the spindle down and up. The end of the pinio arbor opposite the hand rod is connected with one end of a coiled spring 16, the other end of which spring isattachedto a box 17 that is fastenedto the side of the supporting bracket. The spring connections are so made that when the spindle is fed down thespring is tensioned and when'the hand bar is re leased the tension of the spring will rotate the pinion and feed the spindle up. By this meansthespindle may be'fed down and up by hand, or fed down by hand and returned by the spring. i

Rotatably mounted on the pinion arbor is a sleeve 18 provided with one member 19 of a ratchetclutch, and keyed to this sleeve is a worm wheel 20. The other member 21 of the ratchet clutch is splined on the pinion arbor and is yieldingly held againstthe member 19 by means of spring plungers 22. This clutch permits the worm wheel when rotated to drive the feed pinion and feed the tool shaft down, but allows the 1 feed pinion to be rotated by the hand rod for feeding the spindle down without turning the worm wheel.

Engaging the worm wheel is a worm 23 the shaft 24. of which is mounted in suitable bearings '1I1 a carrier 25 that is pivoted at one end to the supporting bracket. On the end of the worm shaft adjacent to the pivot is a bevel gear 26 in mesh with which is a bevel gear27 on the lower end of the vertical feed shaft 28. The lower end of the feed shaft is journa-lled in a hub 29 on the supporting bracket while the upper endof the feed shaft is telescoped into a rotatable feed quill 30. The feed shaft and feed quill are splined so that they will rotate. as one but are capable of longitudinal extension and contraction to permit the bracket to be raised and lowered s of the pillar.

journalle'd in a casing 31 attached to the top Connectedto the top ofthe feed quill in the casing is a gear 32 meshing with which is a gear 33 on the upper end of ashaft 34 that is journalled' in the casing 31. Keyed on the lower end of the shaft 34 is a cone pulley 35. This pulley is connected by a belt 36 to the cone pulley 37 on the lower end of the spindle drive sleeve 5. By means of these co -operating elements the feed worm is driven from and with relation to the spindle. 'By shifting the belt on these pulleys the speed of the shaft 34 may be altered and by changing the relative sizes of the

gears

32 and 33 the speed of the feed quill may be altered, thus by making such changes as may be elfected through these elements the speed of the feed pinion may be varied very considerably in order to accommodate the operating feed of 'the tool spindle to different kinds of work the tool may be required to perform. A belt tightener 38 may be provided for'keeping'the necessary tension of the belt 36.

Owing to its weight the carrier tends to swing down on its pivot and draw the worm out of engagement with the worm wheel. A vertical rod 39 slidably mounted on the supporting bracket has a collar 40 at its lower end which extends under a part of the carrier. On this rod is a collar 41 and thrusting between this latter collar and'a lug 42 projecting from thebracket, is a spring 43, the tension of which draws up the rod and lifts the carrier so that the worm will engage with the worn wheel. A trip latch 44 in the shape of an angle lever is pivoted to the front part of the supporting bracket in position to engage under a part of the carrier and hold it up with the worm and worm wheel in mesh. A spring plunger 45 engages the trip latch and tends to press it into looking position.

On a horizontally extending rod 46 rotatably and slidably mounted on the supporting bracket is a cam 47 above the top of the rod 39 and a cam 48 above the upper end of the latch 44. This rod has a handle 49 by means of which it may be manipulated. Adjustably clamped on the spindle feed sleeve is a depth gage 50 which is provided with a trip screw 51 located in line with the cam 48. As the-tool spindle approaches the lower limit of its travel, when fed by the power feed with the worm and worm wheel engaged, the trip screw 51 engages and turns the cam 48. This cam when so moved presses down the upper end of the latch 44 and causes the lower end of the latch to swing out and release the carrier. At the same time the cam 48 turns the rod 46 and cam 47, which latter cam thus turned forces down the rod 39 compressing the spring 43 and allowing the carrier to swing down under gravity so that the worm becomes disengaged from the worm wheel. As the rod 39 is forced down the tooth'52 of latch 53, pivoted to the supporting bracket, is swung forward by the spring plunger 54 soas to engage the collar 41 and hold therod 3-9 down with the spring 43 under tension and the worm disengaged from the worm wjheel. As the worm becomes disengaged from the worm wheel the downward feed of the tool spindle ceases. The exact time of-this action is obtained by first adjusting the depth gage on the feed sleeve and then adjusting the trip screw car ried by the depth gage. Immediately the worm and worm wheel become disengaged the spring at the end of the feed pinion arbor causes the upward movement of the tool spindle. .As the spindle rises the

cams

47 and 48 are turned back to their normal position by the spring 55 coiled ontherod 46.

lVhen the tool spindle approaches the upper limit of its travel the collar 56 on thelower end of the feed sleeve engages with the. end of a rod 57 that is adjustably fastened to and extends forward from the lower end of the latch 53, and turns the latch so that therod 39 is released and the spring 43 is free to lift the carrier and cause the reengagement or" the worm and worm wheel.

A counterbalance weight 58, located in the pillar 4, is connected by a chain 59 with the rack 12 for assisting the coiled spring 16, connected with thepinion arbor 14, in lifting the spindle. This weight permits of the use of a relatively light spring for effecting the return of the spindle. The chain is attached to a rod 60 that extends loosely through the weight and at its'lower endhas a spring 61 on which the weight rests. This spring cushions the weight when the spindle is raised and the weight drops so as to relieve the parts from jar.

To eliminate shock when the spindle reaches the upper limit of its movement under the pull of the counterbalance weight and tension of the coiled spring connected with the pinion arbor, suitable cushioning means are'provided for arresting the upward movement of the spindle. These means may consist of plungers 62 resting on air, liquid or springs 63 in sockets in the collar 56 at the lower end of the spindle. Then such cushioning means are provided the plungers are adapted to engage with the under sideofa part of the bracket 3 when the spindle is way'up and prevent shock when the spindle is stopped.

lVith the driving shaft made telescopic as shown, that is, consisting of a shaft 28 entering a quill 29, the bracket may be raised and lowered on the pillar in the common manner for locating the spindle nearer to or further from the work, as is desirable for eliiciency, without the shaft at any time extending above the top of the pillar. This allows the employment of pulleys of any size on top of the pillar, as the drive shaft in any adjustment of the bracket can never interfere with the pulleys or belt.

When the machine is to be used with a full automatic feed the control mechanisms are set so that the depth gage screw at the end of each downward movement of the tool spindle will engage the trip cam and cause the freeing of the carrier so that it will swing down and be temporarily held down with the worm and worm wheel disengaged, and then at the end of each upward movement of the spindle the latch that holds the carrier down will be released and allow the spring to lift the carrier and reengage the worm and worm wheel. These movements can be continued automatically with the parts properly adjusted to give the required travel down andup of the tool spindle as long as desired.

If it is desired to use the machine with a semi-automatic feed, that is, to allow the feed shaft to, through the gears, worm and worm wheel, feed thetool spindle downward and then become released so that the spring will feed the tool spindle upward and the feed stop, the parts are adjusted the same as described as for the full automatic feed except that the rod 57 which extends from the latch 53 is pushed back so that it will not be engaged by the collar 56 on the feed sleeve when the spindle reaches its upward limit.

' 'When the rod 57 is not thus engaged the latch 53 holds the carrier down with the worm and worm wheel disengaged. A subsequent downward power feed may be obtained by pushing back the rod 46 against the latch 53 and causing it to release the rod 39 so that the spring will be free to lift the carrier and engage the worm and worm wheel. If it is desired to feed the tool spin dle by hand, as previously described, the carrier may be retained down by the-latch 53, and then the feed sleeve moved up and down by the hand bar. It is possible to move the pinion for feeding the tool spindle down faster than would be possible with theworm and worm wheel by-hand, owing to the provision of the ratchet clutch between the worm wheel and the feed pinion arbor. V

Vith or without the worm and. worm wheel engaged the tool spindle may be fed down by hand through the hand bar. .I/Vhen the full automatic operation is required the depth gage screw 51 is set to engage the trip cam 48 at the lower limit of the travel of the tool spindle and cause the disengagement of the worm and worm wheel, and the rod 57 set to be engaged by the collar 56 on the feed sleeve at the limit of its upward travel so as to permit the worm and worm wheel to be engaged. For semi-automatic feed Work the rod 57 is adjusted so that it will not be engaged by the collar on,the feed sleeve at the upward limit of its travel. Under this condition the tool spindle is fed down by power, released, lifted by the spring and then stops. The movements of the carrier for engaging and disengaging the worm and worm wheel are slight, therefore are quickly accomplished and are made in such man- 1. In a drilling machine in combination with. the rotatory and reciprocatory' tool vspindle and 'means for rotating the spindle,

of a rack and pinion for reciprocating the spindle, a worm wheel connected with the pinion shaft, a worm engaging the worm wheel, means driven from the spindle for rotating the worm, and means operable automatically and by hand for engaging the worm with the worm wheel and disengaging the worm from the worm wheel and effecting the feed and cessation of feed of the spindle.

2. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of a rack and pinion for reciprocating the spindle, a worm wheel connected with the pinion shaft, a worm adapted to engage the worm wheel, means driven from the spindle for rotating the worm, and means tripped by the upward and downward movements of the spindle for automatically engaging the wormwith and disengaging the worm from the worm wheel.

3. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of a rack. and pinion for reciprocating the spindle, a worm wheel connected with the pinion shaft, an oscillatory worm adapted to engage the worm wheel, means driven from the spindle for rotating the 'worm, and means for automatically oscillating the worm toward and from the worm wheel for the purpose of engaging these members at the end of the return movement of the spindle and disengaging them at the end of the feed movement of the spindle.

4. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle,

by the movements of the spindle for engaging the worm with and disengaging the worm from the worm wheel and thus effecting the continuous alternate feed and re turn of the spindle.

5. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of a rack and pinion for reciprocating the spindle, a worm wheel, a ratchet clutch connecting the worm wheel with the pinion shaft, a worm engaging the worm wheel, means driven from the spindle forrotating the worm, and means actuated by the move ments of the spindle for disengaging the worm from and engaging the worm with the worm wheel.

6. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of a rack and pinion for reciprocating the spindle, a worm wheel connected with the pinion shaft, a worm engaging the worm wheel, means driven from the spindle for rotating the worm, means for rotating the pinion shaft by hand with the worm engaged with the worm wheel, and means for disengaging the worm from the worm wheel.

7. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of a rack and pinion for reciprocating the spindle, a worm wheel, a ratchet clutch connecting the worm wheel with the pinion shaft, means for rotating the pinion shaft by hand, a worm engaging the worm wheel, means driven from the spindle for rotating the worm, and means actuated by the movements of the spindle for disengaging the worm from and engaging the worm with the worm wheel.

8. In a drilling machine in combination with the rotary and reciprocatory tool spindle and means for rotating the spindle, of a rack and pinion for reciprocating the spindle a worm wheel connected with the pinion shaft, a worm engaging the worm wheel, means driven from the spindle for rotating the worm, a spring for engaging the worm with the worm wheel and means operable by hand for disengaging the worm from the worm wheel.

9. In a drilling machine in combination with the rotary and reciprocatory tool spindle and means for rotating the spindle, of a raclcand pinion for reciprocating the spindle, a worm wheel connected with the pinion shaft. a worm adapted to engage the worm wheel, a spring for causing the engagement of the worm with the worm wheel, means for locking the worm engaged with the worm wheel, means driven from the spindle for rotatin the worm, means operable by the downward movement of the spindle for releasing said locking means and allowing the disengagement of the worm from the worm wheel, means operable by the clownward movement of the spindle for placing said spring under tension, means for retaining the spring under tension, and means operable by the upward movement of the spindle for releasing said retaining means and allowing the spring to engage the worm with the worm wheel.

10. In a drilling machine in combination with a rotatory and reciprocatory tool spindle and means for rotating the spindle, of a rack and pinion for reciprocating the spindle, a worm wheel connected with'the pinion shaft, a worm adapted to engage the worm wheel, a spring'for causing the engagement of the worm with the worm wheel, means driven from the spindle for rotating the worm, means actuated by the downward iiovement of-the spindle for relieving the tension of said spring and allowing the disengagement of the worm from the worm wheel, means for retaining the worm disengaged, and means actuated by the upward movement of the spindle for releasing said retaining means and allowing the spring to engage the worm with the worm'wheel.

11. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of a spring for feeding the spindle upward, a rack and pinion for feeding the spindle downward, a worm wheel connected with the pinion shaft, a worm engaging the worm wheel, means driven from the spindle for rotating the worm, a spring for engaging the worm with the worm wheel and means for disengaging the worm from the worm wheel and at the same time placing said worm engaging spring under tension.

12. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of a spring for feeding the spindle upward, a rack and pinion for feeding the spindle downward, a worm wheel connected with the pinion shaft, a worm adapted to engage the worm wheel, a spring for causing the engagement of the worm with the worm wheel, means driven from the spindle for rotating the worm, means actuated by the downward movement of the spindle for disengaging the worm from the worm wheel and allowing the feed spring to lift the spin dle, means for retaining the worm disengaged, and means actuated by the upward movement of the spindle for releasing said retaining means and allowing the worm elevating spring toengage the worm with the worm wheel.

13. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of a rack and pinion for reciprocating the spindle, a worm wheel connected with the pinion shaft, a worm engaging the worm wheel, a spring for engaging the worm with the worm wheel, means for disengaging the worm from the worm wheel and placing the spring under tension, bevel gears for rotating the worm shaft, a telescopic shaft for driving the gears, and gearing driven from the spindle for rotating the telescopic shaft.

14. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of a spring for feeding the spindle upward, a rack and pinion for feeding the spindle downward, a worm wheel connected with the pinion shaft, a worm adapted to engage the worm wheel, a spring tensioned for engaging the worm with the worm wheel, means driven from the spindle for rotating the worm, means operated by the downward movement of the spindle for relieving the action of said worm engaging spring and disengaging the worm from the worm wheel and allowing the feed spring to lift the spindle, means actuated by the upward movement of the spindle for releasing the worm engaging spring and allowing it to engage the worm with the worm wheel.

15. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of a spring for feeding the spindle upward, a rack and pinion for feeding the spindle downward, a worm wheel connected with the pinion shaft, a worm adapted to engage the worm wheel, a spring tensioned for engaging the worm with the worm wheel, means driven from the spindle for rotating the worm, means operated by the clownward movement of the spindle for relieving the action of said worm engaging spring and for disengaging the worm from the worm wheel and allowing the feed spring to lift the spindle, cushioning means for stopping the upward movement of the spindle, and means actuated by the upward movement of the spindle for releasing the feed spring and allowing it to lift the spin dle.

1.6. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of means for feeding the spindle upward, a rack and pinion for feeding the spindle downward, a worm wheel connected with the pinion shaft, a worm adapted to engage the worm wheel, a spring for' engaging the worm with the worm wheel, means driven from the spindle for rotating the worm, means actuated by the downward movement of the spindle for relieving the action of said spring and allowing the worm to drop out of engagement with the worm wheel, and means operated by the upward move- ,ment of the spindle for permitting the gagement of the worm with the worm wheel.

18. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating'the spindle, of a rack and pinion for reciprocating the spindle, a worm wheel connected with the pinion shaft, a worm adapted to engage the worm wheel, a spring arranged to engage the worm with the wormwheel, a latch adapted to hold the worm and worm wheel engaged, a latch adapted to retain the worm disengaged from the worm wheel with said spring under tension, means movable downward with the spindle for disengaging the former latch, means movable upward with the spindle for disengaging the latter latch, and means driven from the spindle for rotating the worm.

19. In a drilling machine in combination with the rotatory and reciprocatory tool spindle and means for rotating the spindle, of a rack and pinion for reciprocating the spindle, a worm wheel connected with the pinion shaft, a worm adapted to engage the worm wheel, a spring arranged to engage the worm with the worm wheel, a latch adapted to hold the worm and worm wheel engaged, a latch adapted to retain the worm disengaged from the worm wheel with said spring under tension, means movable with the spindle and by hand for disengaging said latches, and means driven from the spindle for rotating the worm.

CORTIS F. SHERMAN.