US1432011A

US1432011A - Slot-cutting machine

Info

Publication number: US1432011A
Application number: US412009A
Authority: US
Inventors: Edwin J Armstrong
Original assignee: FREDERICK B MCBRIER
Current assignee: FREDERICK B MCBRIER
Priority date: 1920-09-22
Filing date: 1920-09-22
Publication date: 1922-10-17
Anticipated expiration: 1939-10-17

Description

vE. J. ARMSTRONG. SLOT CUTTING MACHINE- APPLlcATIoN msn sEPLzz. 1920.

INVENTOR ATTOR E. 4l. ARMSTRONG.

SLOT CUTTING MACHINE. APPLICATION FILED SEPT. 22. 1920.

1,432,011. mma oet. 17,1922..

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I VENoH ATTONEY E. J. ARMSTRONG.

sLoT cuTTmG MACHINE.

` i APPLICATION FILED SEPT. 22| 1920- '4 1,432,01 1 Patented Oat. 17, 1922. v

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.en FH INVENTOR if? #Cif ATTORNEY E. l. ARMSTRQNG. SLOT CUTTING MACHINE. APPLlcArlon man SEPT. :z2`l 1920.

Patented Oct. 17, 19212.

s SHEETS-shin 4.

ATTORNEY E. J. ARMSTRONG.

SLOT CUTTING MACHINE. APPLICATIQNHLED SEPT. 22. 1920.

1,432,011. Patented 0015.174922.

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l /IZ' gli! 97 IXNT R m @zdf/fm AT ONEY EQ I. ARMSTRONG. SLOT CUTTING MACHINE. APPLICATION FILED SEPVT. 22, I920 1,432,01 1, Patented ont. 17,1922.

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I INVENTOR I L ATTORNEY j atenteel @et i7, 1922.

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EDWIN J. ARMSTRONG, OF ERIE, PENNSYLVANIA, ASSIGNOR TO FREDERICK IB. MCBRIER, 0F ERIE, PENNSYLVANIA.

snor-CUTTING MACHINE.

Application led September 22, 1920.` Serial No. 412,009.V

T0 all whom t may concern.'

Be it lrnown thatl, EDWIN J. ARMSTRONG, a citizen of the United Sta-tes, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in a Slot-Cutting Machine7 of which the following is a. specification. i

Thisinvention is designed for making slots with one side of the slot closed and particularly with one end of the slot inclined. It is particularly designed to slot a wrench in which there is a fixed jaw, a movable jaw, a guiding surface for the `movable jaw, and a slot extending from theiguiding surface into the body of the wrench, one side of the slot being formed by a drilled opening, the slot extending endwise in an inclined direction under the lined jaw,` the slot in cross section being ofhey-liole shape.

In carrying out niy invention l reciprocate a tool and move lthe material from the guiding surface into the drilled opening. The direction of reciprocatioii follows the inclination of the end of the slot. This permits of the use of an ordinary cutting tool and simplies the making of this type of wrench.

The invention is illustrated in the accompanying drawings as follows:-

Fig. 1 shows a front elevation of the machine. j

Fig. 2 a rear elevation of the machine.

Fig. 3 a plan view of the machine.

Fig. 4 a side view of the end of the wrench showing the form of the slot. t

Fig. an enlarged view` of the clamping mechanism. I

Figs. 6, 7 and 8 details of the clamp or workholding mechanism.

Fig. 9 an elevation of the automatic stop mechanism.

Fig. 10 an elevation of the latch forming part of the automatic stop mechanism. 1 marks the table of the machine and 2 the legs on which it is mounted, the table being secured to the legs hy bolts 3. An upright frame 4 is mounted on the table being secured by screws 4a.

A tool holder is carried in a reciprocating arm 5. This arm is mounted on a shaft' 6 locked there-on by a key 7. The end of the arm is split at 8 and a clamping screw 9 is provided for clamping the arm on the shaft vso as to make the arm rigid with the shaft.

A tool l() is carried ina tool-holder 11, the rear of the tool being engaged by an adjusting screw 12 and the tool being clamped in the yholder hy thescrews 13. The tool has a reciprocating motion for convenience. In thel form shown the reciprocation is in the form ofoscillations on the shaft 6. The arc, however, is such that the curve of the finished cut does not interfere with the finished article. The shaft 6 is journaled in hearings 14 and 15 in the frame. A rock arm 1G isl locked with the opposite end of the shaft from the arm 5. A pin 17 connects the roch arm 16 with a pitman or connecting rod 18. The connecting rod 18 has a strap or crank'bearing 19 which operates on a craiilr 20. The crank 20 is formed in the drive shaft `21. The drive shaft 21 is mounted in bearings 22 on the frame 4 and is provided with tight and loose pulleys 23 and 24. The wrench 25 has an opening26 in the end of the handle. lt is provided with a xed jaw 27 with a guiding surface 2S on which a moving jaw operates, a drilled opening 29 and a slot 30 extending from the face 28 into the drilled opening. The end of `the slot is inclined at 31 to permit of the extension of the projection on the movable jaw as hereinbefore expressed.

The work-carrying and feeding mechanism is as follows: A work carrier 32 has the guide extensions 33 and 34. The extension 33 operates in a guide opening 35 in the frame 4 and the extension 34 in a guide 36 on a movable plate 35'h1 at the top of the frame. The carrier has an extension 37 which has an off-set 38 (see Fig. 3) on which a plate 39 is secured by means of screws 40. lThis forms a groove which engages a guide 4l on the frame and loclis the carrier against swinging on the guides 33 and 34. A plate 42 is secured on the extension 3T by a screw 43, the plate having a slot 44 (see dotted lines) to permit of adjustment and a set screw 45 is arranged at the end of the plate for convenience in adjusting the plate on the extension. The bottom of the plate is provided with a pin 46 which extends into a `rock lever 47. A wheel 48 is mounted at one end of the rock lever and awheel 49 at the opposite end of the rock lever, The wheel 48 rides the cam 50.` The cam 50 is locked on a shaft 51 secured by a nut 52. The shaft 51 is journaled in bearings (not shown) on the frame. A ratchet wheel 53 is secured to the opposite end of the shaft 51 by means of a nut 54 and locked against rotation on said shaft.

It will readily be seen that as thecam is rotated it operating on the wheel 48 gradually lifts the work-carrier until the wheel 48 passes olf the end of the cam when it permits the work-carrier to drop preparatory to a second operation. The ratchet wheel is actuated by a pawl 56. The pawl 56 is carried by a .pin 57 on a plate 58; The plate 58 is secured by a screw 59 to the end of the shaft 6. The screw extendsthrough a slot 60 by means of which the eccentricity of the plate may be adjusted so as to vary the throw of the pawl. A set screw 61 is arranged in an ear 62 on the arm 16 by means of which the plate may be locked against movement under the thrust of the pawl. The pawl extends past an off-set lever 63, this lever being mounted on a screw 64 extending from the frame. The lever is provided with a pin 65 which, when the lever is operated, operates against the pawl to disengage it from the ratchet wheel. A spring 66 yieldingly holds thepawl in engagement with the ratchet wheel. A holding pawl 67 is mounted on a screw 68 extending' from the frame. The spring 66 also operates on the holding .pawl and keeps itin engagement with the ratchet wheel. A pin 69 extends from the lever 63 in position to operate on the-holding pawl 67 to throwit out of engagement when the lever is operated. When these are thrown out of engagement it permits of a free movement of the cam for setting the machine. It will be noted that as the arm 16 is oscillated the ratchet pawl is reciprocated and the ratchet wheel moved forward .to effect the step-by-step movement of the cam 50 so as to effect the feeding of the work-carrier.

In order to back off the work from the tool `on the return stroke I provide a cam 70 on the drive .shaft 21 which operates on the wheel 49 at the end of the rock lever 47. Thecam 70 is so formed that on the return stroke of the arm 5 the roller 49 drops into a depression in the cam and this allows a slight backward movement of the carrier and just previous to the forward stroke of the tool carrying arm the lever 47 is again lifted to its normal position and held in this position during the cut. Thus the cam 70 operates to back off the work and the cam 50 progressively feeds the work forward.

belt shifter 71 is mounted on a rock arm 72, the rock arm being pivotally mounted on -a pinl 74, the pin extending through the ears 73 on a bracket 78a extending from the frame.v A link 75 extends from the belt shifter to a throw-off lever 76. The throwofi' lever is pivotally mounted on a pin 77 carried by an extension or bracket 77fL on .f the frame. A latch 78 is pivotally mounted at 79 on the extension 7 7a and the latch has a projection which extends into the latch notch 80 in the lever 76. The latch is provided with an extension 81 by which it may be manually disengaged if desired. An escapement lever 82 is pivotally secured on the latch78 by means of a screw 83. A spring 84 is coiled on a pin 85 on the extension 77a, one end resting against a pin 86 and 'the opposite end against a pin 87 on the escapement lever 82. The escapement lever has a projection 88 which engages the pin 79, the pin thus forming-a stop for the lever 82. It also has a projection 89 which is in the path of a pin 90 extending from the plate 89 on the carrier extension 37.

Vhen the cam 50 reaches its extreme throw and drops into the low surface of the cam thus permitting the work carrier to drop the pin 90 is carried downwardly and engages the projection 89 and the end of the escapement lever being in engagement with the pin 79, latch 78 and lever 82 swing together thus pulling the latch out of engagement with the lever 76 and permitting said lever to operate to throw the belt on to the loose pulley thus stopping the machine. The weight of the rock lever and parts with the pivotal mounting at the inside furnish sufficientpower to .shift the belt, the parts swinging to the position shown in dash lines in Fig. 9. When the carrier is moved upwardly in the feeding movement the escapement lever 82 simply swings on the pin 83 allowing the pin 90 to pass without disturbing` the latch 78. j

A clamp plate 91 is mounted on the workcarrier 32. It has a clamping face 92 which is adapted to engage the fixed jaw 27 and the face 28 of the wrench. A pin 93 extends through the opening 26 in the wrench handle. The pin 93 is carried by a plate 94 secured to the extension 37 of the work carrier. A clamping plate 95 has a lip 96 which engages the side of the wrench when in place (see Figs. 6, 7 and 8). It is provided with a wedge surface 97 which engages the rear face of the wrench and crowds the j aw 27 and face 28 into engagement with the block 92. The plate 95-has an extension 98 with a bevelled end 99, the bevelled end operating on a bevelled surface 100 on the work-carrier so that as the plate is drawn down the wedge surface 100 also operates to force'the wrench intoengagement with the block 92. f

The clamping plate 95 is mounted on a rod 101 and secured thereon by a nut 102. The rod extends through a spring housing 103 having the opening 104 in which the spring 105is placed. A cap 106 is arranged on the rear end of the rod 101 and the spring 105 operates against this cap. The cap operates against a nut 107 and as the cap is moved outwardly against the nut through` the influence of the spring pressure the clamp is set. A lever 108 has a thrust surface 109 operating against the cap 106. The lever is mounted on a pin 110 on the housing 103. It is connected by a link 111 with a foot lever 113, a pin 112 securing the link to the lever. When it is desired to release the clamp the foot lever is depressed, thus depressing the lever 108. The thrust surface 109 engages the cap 106 and crowds the spring inwardly and permits the release 0f the clamp.

It will be noted that the feed is in a line of an acute angle to the path of the tool so that at the completion of the feeding action there are the inclined ends of the slot providing for the projection on the movable jaw of the wrench as before described. The drilled opening 29 having its axis at a-a permits of the clearance into which the tool extends at the completion of its cut and as the feeding movement advances the line marking the end of the tool at the extreme forward end of its reciprocation extends along the drilled opening. The end of the reciprocation of the cutter follows along the line of the drilled opening because the feeding movement is in a line at an acute angle te the line of the cut.

lWhat I claim as new is 1. In a slot cutting machine, the combination of a tool-holding member; a workliolding member; means for reciprocating said members relativelyT to each other; and feeding devices advancing said members relatively to each other, said means and devices operating to make the line marking the end of the reciprocations at an angle other than a right angle to the line of reciprocating movement.

2. In a slot cutting machine, the combination of a tool-holding member; a workholding member; means for reciprocating said members relatively` to each other; and feeding devices advancing said members relatively to each other, said means and devices operating tomake the line marking the .end of the reciprocations at an acute angle to the line of reciprocating movement.

3. In a slot cutting machine, the combination of a tool-holder; a work-holder; means for reciprocating the tool-holder; and devices for advancing the work-holder, the line traversed by the end of the tool carried by the tool-holder relatively to the work carried by the work-holder being at an angle other than a right angle to the line of reciprocating movement.

4. In a slot cutting machine, the combination of a tool-holder; a work-holder; means for reciprocating the tool-holder; and devices for advancing the work-holder, the line traversed by the end of the tool carried by the tool-holder relatively to the work carried by the work-holder being at an acute angle to the line of reciprocating movement.

5. In a slot cutting machine, the combination of a tool-holder; a work-holder; means for reciprocating the tool-holder, the forward point of travel being constant; and a feeding device for the work-holder advancing the work-holder in a line other than a right angle to the line of reciprocating movement.

6. In a slot cutting machine, the combination of a tool-holder; a work-holder; means for reciprocating the tool-holder, the forward point of travel being constant; and a feeding device for the work-holder advancing the work-holder in a line forming an acute angle to the line of reciprocating movement.

7. In a slot cutting machine, the combination of a tool-holding member; a workholding member; means for reciprocating said members relatively to each other; feeding devices advancing said members relatively to each other, said means and devices operating to make the line marking the end of the reciprocations at an angle other than a right angle to the line of reciprocating movement; and mechanism automatically backing oif the feeding movement on the return reciprocation.

8. In a slot cutting machine, the combination of a tool-holder; a work-holder; means for reciprocating the tool-holder; devices for advancing the work-holder, the line traversed by the end of the tool carried by the tool-holder relatively to the work carried by the work-holder being at an angle other than a right angle to the line of reciprocating movement; and mechanism automatically backing off the feeding movement on the return reciprocation.

9. In a slot cutting machine, the combination of a tool-holder; a work-holder; means for reciprocating the tool-holder, the forward point of travel being constant; a feeding device for the work-holder advancing the work-holder in a line other than a right angle to the line of reciprocating movement; and mechanism automatically backing off the feeding movement on the return reciprocation.

10. In a slot cutting machine, the combination of a tool-holding member; a workholding member; means for reciprocating said members relatively to each other; feeding devices advancing said members relatively to each other, said means and devices operating to make the line marking the end of the reciprocations at an angle other than a right angle to the line of reciprocating movement; and an automatic stop mechanism automatically stopping the machine at a pre-determined point in the feeding movement.

11. In a slot cutting machine, the combination of a tool-holder; a Work-holder; means for reciprocating the tool-holder; dcvicesfor advancing' the Work-holder, the line traversed bythe end of the tool carried by the tool-holder relatively to the Work carried by thevvork-holder being at an angle other than a right angle to the line of reciprocating movement; and an automatic stop mechanism automatically stopping the machine at a predetermined point in the feeding movement.

12. In a slot cutting machine, the combination of a tool-holder; a Work-holder; means for reciprocating the tool-holder, the

f forward point of travel being constant; a

feeding device for the Work-holder advancing the Work-holder in a line other than a right angle to the line of reciprocating movement; and an automatic stop mechanism au y tomatically stopping the machine at a predetermined point in the feeding movement 13. In a slot cutting machine, the combi. nation of a tool-ho-lding member; a Workholdingmember; means for reciprocating said members relatively to each other; feeding devices advancing said members relatively to each other, said means and devices operating to make the line marking the end of the reciprocations at an angle other than a right angle to the line of reciprocating movement; and means automatically returning the member having the feeding movement at the completion of the Work'.

14. In a slot cutting machine, the combination of a tool-holder; a Work-holder; means for reciprocating the tool-holder, the forward point of travel being constant; a feeding device for the Work-holder advancing` the Work-holder in a line other than a right angle to the line of reciprocating movement; and means for automatically returning the Work-holder at the completion of the Work 15. In a slot cutting machine, the combination of a reciprocating tool-holder; a Work carrier; a cam advancing the Work carrier;

a ratchet connected with the cam; and a pawlmoving With the tool-holder and acting on the ratchet to actuate the cam.

16. In a slot cutting machine, the combination of a reciprocating tool-holder; a Work carrier; a cam advancing the work carrier; a ratchet connected with the cam; and a pawl moving With the tool-holder and acting on the ratchetto actuate the same, said cam having a depression permitting the return of the carrier at the completion of the cycle.

17. In a slot cutting machine, the combination of a reciprocating tool-holder; a Work carrier; a cam advancing the Work carrier; a rachet connected with the cam; a pavvl moving' with the tool-holder and acting on the ratchet to actuate the cam; and a second cam operating in connection With the first cam With each reciprocation of the toolholder for backing off the Work.

18. In a slot cutting machine, the combination of a Work carrier; a rock lever carrying the Work carrier; a cam operating at each endof the rock lever, one cam arranged to progressively advance the Work and the other cam operating to back off the Work for the return of the cutting tool; and a reciprocating tool carrier connected With the backing-off cam. V

19. In a slot cutting machine, the combination of a Work carrier having a feeding movement and a return movement at the completion of the slot; a stop mechanism; and means for actuating the stop mechanism upon the return movement of the Work carrier. y i

20. In a slot cutting machine, the combination of a work carrier having an advance movement for the Work and a return movement; a belt shifter; a latch locking the belt in driving position; and trip mechanism operated by the return movement of the Work carrier for releasing the belt shifter to shift' the belt to non-driving position.

21. In a slot cutting machine, the combination of a Work carrier; a cam mounted 0n the Work carrier comprising a clamping block; and a clamping plate having a lip and Wedge surface for clamping the Work in two directions against the block andthe face of the carrier.

22. In a slot cutting machine, the combination of a Work carrier; a clampinfr block on the Work carrier; aclamping plate; a wedge surface operating on the clamping plate; and an overhanging surface on the clamping plate whereby the Work is clamped against the face of the Work carrier and moved edgewise against the block.

23. In a slot cutting machine, thecombination of a Work carrier; a clamping plate for holding the Work; a rod extending from the clamping plate; a spring operating on the rod to move the clamp to clamping position and a lever mechanism for releasing the clamp.

24. In a slot cutting machine, the combination of a Work carrier; a clamping plate for holding the Work; a rod extending from the clamping plate; a spring operating on the rod to move the clamp to clamping position; and a foot lever for releasing the clamp.

In testimony whereof I have hereunto set my hand.

EDWIN ARMSTRONG.