US1798920A - Threading machine - Google Patents

Description

March 31, 1931. R WILCQX TI-IREADING MACHINE Filed Jan. 20, 1930 1 9 Sheets-Sheet l R. L. WILCOX v THREADING MACHINE Filed Jan.

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March 31, 1931. R. L. WILCOX THREADING MACHINE Filed Jan. 20, 1930 9 Sheets-Sheet 9 gvvuvntor, ichardLesfermlcoac Patented Mar. 31, 1931 UNITED STATES.

PATENT orrlcr.

RICHARD LESTER WII COX, F WATEBBURY, CONNECTICUT, ASSIGNOR TO THE WATER- IB'URY FARREL FOUNDRY AND MACHINE COMPANY, OF WATERBURY, CONNECT ICUT, A CORPORATION OF CONNECTICUT rnmiamne MACHINE Application filed Januaw 20, 1930. Serial No. 422,146.

This invention relates to a new and improved threading machine of the roll thread type.

. In a machine of this character it is desirable to operate upon blanks of various lengths and upon blanks of the same length wherein the length of thread rolled thereon varies, and to accomplish this with the minimum adjustments. A

It is advantageous also that the blanks be conveyed in a continuous stream to a. point where they are presented to the dies, with the minimum mechanism.

These and other new and useful objects are accomplished in the threading machine herein shown and described, and in addition thereto means are provided whereby it is impossible for more-than a single blankto enter or lie between the dies or be positioned there- 29 between at one and the same time, the stream of blanks being entirely shut ofi" after a blank has entered between the dies and unltil it has passed between and been released by the dies. To these and other ends my invention con-v sists in the threading machine, having certain details ,of construction and combinations of parts, as will be hereinafter described and more particularly pointed out in the claims.

In the drawings, wherein like numerals of reference designate like parts in the several figures:

Figure 1 is a fragmentary plan view of my improved threading machine;

Figure 2 is a side view thereof;

Figure 3 is an end view thereof;

Figure 1 is an enlarged side view of the chute mechanism and associated parts adjacent thereto;

Figure 5 is an enlarged side view of the threading machine, substantially 'opposite that portion of the machine shown in Figure 4;

Figure 6 is an enlarged view of a portion of the threading machine showing particu- 15 larly the fixed die, the slide mechanisms and '26 is secured by the clamp 27, or the like, is

associated parts, the parts in section being illustrated as taken generally upon line 6-45 of Figure'l;

Figure? is an enlarged view of a portion of the mechanism substantially as shown in Figure 6 with the safety device in the position opposite to that shown in Figure 6;

Figure 8 is an enlarged fragmentary plan view of that portion of the threading machine immediately adjacent to the delivery end of the chute; I Figure 9 is an enlarged fragmentary plan view of a portion of my improved threading machine as illustrated in Figure 8, but showing a plurality of blanks in the chute and one blank about to be passedbetweeni the threading dies;

Figure 10 is an enlarged sectional elevation of that portion of the mechanism shown in- Figure 8, the parts in section being taken generally on line 10-10 thereof.

Figure 11 is a sectional view of the hopper device parts, upon line 11-11 of Figure 12;

Figure 12 is a sectional view of the hopper devlice parts, upon line 12-12 of Figure 11; ant

Figure 13 is a transverse sectional view of the slides and adjacent parts, taken generally upon line-13-13 of Figure 6.

In the drawings, 10 designates the pedestal or base having a pan ll-connccted therewith to receive the finished product and lubricant, 1f any, after passing through the machine, and secured to the top of the pedestal at an gngle of approximately 30 is the body mem- Power is transmitted to the machine through a driving wheel 13 fixed on the shaft 14, having a pinion 15 thereon, the teeth of which mesh into those of a. gear 16 upon the shaft 17. The shaft 14 is journaled in a bracket 112.

Slidable within the body member 12 between the gib 20 and a cap 21 is the gate 18 that is connected with the gear 16by the pitman 19, whereby reciprocatory movement is imparted thereto; Secured to the gate by the clamp v22, or the like, upon a suitably sized filling block 24, is the movable die 23.

A die block 25, to which the stationary die adjustably mounted on the body member 12 toward and away from the gate, by screws '29 and stop screws 28, substantially as shown in Figure 1. A stud 30 in the body member 12, in engagement with the die block 25, provldes additional support for the die block and in part absorbs the end strain thereof. The die block is held in any of its adjusted positions on the body member by the bolts 31 which pass through slots 32 therein.

Near the upper end of one side of the body member is a plate 33 which may be made in tegral therewith or separate and secured thereto as may be desired. Upon this plate is slidably mounted the hopper bracket 34, through the manipulation of the screw 35, the head of which rests against the lug 36 and is locked in its adjusted position by the nut 37. The hopper mechanism 38, which can be of any preferred type, is supported upon this bracket and is secured thereon so as to be adjustable horizontally by screws 39. Associated with this hopper mechanism is a clearance mechanism 40, also of any preferred type. The hopper mechanism is thus adj ustable relatively to the body member in a plane substantially parallel thereto and also horizontally. Connected and adjustable with the hopper mechanism are companion chute plates 41. The lower ends of the, chute plates are curved inwardly toward the threading dies, as shown in Figure 8, so that I they terminate substantially in line with the fixed die, whereby a blank passing from the chute is presented directly in line with said dies. By so constructing the chuteplates the use of transfer mechanisms with their objectionable features is thus obviated. The hopper mechanism, clearance mechanism and [chute plates, except as modified herein, are

of any preferred form and constitute no part of this invention.

Adjacent to each other, on the body 12, are the brackets 42 and-43. The bracket 42 is adjustable toward and away from the gate and is secured in its adjusted positions by the bolts 44 which pass. through slots in the bracket.

The outer chute plate near its lower end is fixed to a bracket 45 which forms a rigid support therefor and is slidable upon the pin 46- fixed in the adjustable bracket 42 and held in its adjusted positions by the set screw 47. The inner chute plate 41 is fixed to a bracket 48 which is slidably mounted upon a post 49 in the fixed bracket 43 and held-in its adjusted position by the set screw 50.

Above the opening between the chute plates is a cover plate 51 supported adjustably at its opposite ends by studs 52 and 53, the lat-- ter being mounted in a lug 54 on the bracket 45 and the former in a plate 55 preferably connected withthe hopper mechanism and forming an additional support for the outer chute plate. To accommodate heads of blanks of various sizes passing along the chute plates the cover plate 51 1s moved toward and away from Fixed to the inner end of the outer chute.

plate'41 is a guide plate 56, which extends beyond' the chute plate, and having a guide face 57, which substantially fills the space between dies. During the movement of the blank against the guide face 57 the underside of the head rests on the top of guide plate 56 thus insuring a proper axial position of the blank relative to the dies.

At times it is desirable and convenient that the operator may have access to the lowermost blank in the column of blanks in the chute and others adjacent thereto. as to make these blanks thus accessible, I .provide an extension latch 58 which is piv-. otally connected on the cover plate and having an extension lip 59 that projects. beyond the end of the chute plates and terminates at a point over the movable die or adjacent thereto, substantially as shown in Figure 1.. ,This extension lip insures proper alignment of the blank with the dies and prevents the same from tipping oi tilting, as may be liable to occur from time to time. This latch is held rigid against accidental movement on the cover plate by a spring clamp 60, which is fixed to the cover plate by a screw 61 or the like. Lifting up with the fingers the outer end of the spring clamp .sure to insure the engagement of the blank by the dies.

Also mounted in the bracket 48 adjacent to the slide 62, is'a cut-off slide 64, on the outer end of which is a cut-off finger 65 with an angular pointed nose, which during the movement of the slidepasses between the two lowermost blanks out of the chute and into contact with the movable die in advance of the pusher finger 63, substantially as shown in Figure 9. This cut-01f finger at the same time prevents the escape of any further blanks in the column until withdrawn. The slide 62 derives a reciprocatory movement through the pitman 66 between the stud 67 and the arm 68 upon a rock shaft 69 that is journaled in the fixed bracket 70. On this rock shaft, opposite to the rock arm 68, is the rock arm 71. I

.On the body 12 is .the lever bracket 72, having a stud 73 therein, upon which is j ournaled the rock arm 74 carrying a cam roll 75,

which is in constant engagement with the' face of the cam 76 on the shaft 17, through the action of the spring 84. Pivotally connected with the rock arm 74 is a yoke 77, into Which is threaded one end of a rod 78 that has a shoulder 79 between its ends Where the reduced portion 80 of the rod passes through the block 81 that is pivotally connected with the arm 71.

A spring 82 encircles the portion 80 of this rod between the block 81 and jamb nuts 83 threaded thereon, substantially as shown in Figure 5.

Motion is transmitted to the cut-off slide primarily from the pusher slide and so arranged as to travel in opposite directions. The mechanism whereby th1s is accomplished comprises a cam plate 85 fixed to the slide 62 and having a cam roove 86 within which travels the cam roll 8 upon one arm of a rock lever 88. This latter lever is journaled upon a stud 89 fixed in the bracket 48, one arm of which is slotted, and movably mounted therein is a block. 90 journaled upon a stud 91 fixed in'the slide 64.

The rock arm 88 is mounted on the fixed stud 89 and oscillates thereon as the roll 87 travels in the cam groove as the slide 62 reciprocates, and the parts are so arranged that as the slide 62 returns or moves away from the fixed die, the slide 64 advances toward said die and the cut-olf finger 65 cuts oil the lowermost blank in the chute and into posithe pusher finger as before is traveling forward and rolling the thread,

and does not return until the thread has been completely rolled, after which it returns, uncovering the stream of blanks and permitting another blank to be advanced in front thereof.

llhave provided means whereby to prevent more than a single blank being between the dies. This means consists generally of a rock lever 92 journaled on a stud 93 fixed in thebracket 48 and having a blade arm 94 fastened thereto by screws 96 or the like. This blade arm 94 projects directly over the space between the dies and is of suflicient length to extend to the finishing end of the stationary die. The rock lever 92 terminates in a hook end opposite to the blade arm. The blank as it leaves thechute passes under the blade arm 94 substantially as shown in Figure 6,

and as it is pushed to its position between the dies is engaged thereby. Thus, the rock lever 92 is moved upon its pivot mounting by reason of the fact that the underside of the blade arm 94 rides against the top of the head, substantially as shown in Figure 7, at which time the hook end 95 is moved downwardly in rear of the pusher finger 63 and there remains until the blank has passed out of the dies, when the support provided by the blank for the blade arm 94 being removed, the latter drops by gravity and lifts the hook end 95 to its former position out of the path of the pusher finger 63.

When the bolt is between the dies the slide 62 cannot return and uncover the stream I of blanks in the chute, because the hook end cause prevented by engagement of the rock lever 92 with the pusher finger, the spring- 82 will be compressed and absorb the motion of-the 'cam 76 without imparting movement to the rock shaft 69.

For convenience in adjusting the machine and watching the operation of some of the parts, and for other reasons, without feeding lanks to the dies, I have provided means for preventing the return of the pusher fingers 63, even though no blank is between the dies, comprising a stop finger 98 that is mounted upon a stud 99 upon the bracket 48.

In one of its adjusted positions, such as shown in Figure 6, the stop finger is held in its operative positlon, but if it is desired to maintain the hook end 95 in the rock lever 92 in the path of the finger 63,.this latter finger is ppshed to the dotted lines shown in Figure In operation the blanks pass from the hopper through the chute mechanism, pass the clearance mechanism and successively arrive at the lower end of the chute from whence they escape one by one into the path of the pusher finger by the action of the cut-01f fin-' ger and then advanced through the dies under the safety mechanism that. prevents an- -other blank entering between the dies and mechanism, chute mechanism, pusher and 5 transfer fingers, and safety mechanism, all

as a unit, are adjusted toward and away from the bed of the machine to accommodate blanks of various lengths, after which the parts are again held securely by the set screws 47 and 50 and the jamb nut 37.

A longer or shorter thread is sometimes required on the same length blank and to pro vide for such contingency the chute and hopper mechanism is adjusted in exactly the same manner, occupying different positions relative to the body ofthe machine for the mately their extreme up position, the latter being for long blag-ks having short lengths of threads, and the former the reverse.

The open space between the chute plates may be varied by adjustment of the bracket 42 upon the bed of the machine and the hopper 38 on the bracket 34 after loosening screws 39.

One of the features of my invention is the means for operating from the same shaft having a fixed axis, the hopper mechanism irrespective of its relative position in respect to the bedof the machine. This mechanism consists essentially of a gear carrier 100 preferably made in two parts and secure together by bolts 101 or the like, and in which is a stud 102, upon which is journaled a pinion 103, the teeth of which mesh into those of a gear 104, fixed on the hopper shaft 105, upon which is a driving-pulley 106. A connection 107 also connects the stud 102 and shaft 105. On the shaft 14 is a inion 108. The gear carrier is journaled on t e bushin 109 upon the shaft and is held against en wise movement thereon by the nut 110. An opening 113 in the side walls of the gear car.- rier 100 permits movement of the latter rela 'tive to the hopper shaft 105. The belt 111 is connected with the pulley 106 and by means of which the hopper mechanism is actuated.

' The axis of the shaft 14 is constant but the horizontal axis of the shaft 105 varies according to the relative position of the hopper mechanism upon the body member. Power is constantly derived by the shaft 105 a from the shaft 14 irrespective of such various positions of the latter, throughthe pinions 108, 103 and gear 104. Thisis accomplished through the gear carrier the pinion 108 and gear 103 in mesh with each other and the connection 107 holding the gears 103 and 104 in mesh with each other.

minor changes and alterations may be made and I would therefore have it understoo that I do not limit myself to the exact con- 1. In a threading machine; a pair of dies;

means for guiding blanks to the dies; and

means for pushing the blanks from the.

guiding means to engage both dies, all of said means being adjustable as a unit.

2. In a threadin machine; a pair of dies; means for guiding lanks to the dies; means to prevent the escape of more than one blank at a time from the guiding means, all of said means being adjustable as a unit.

3. In a threading machine; a pair of dies; means for guiding blanks to the dies; means for pushing the blanks from the guiding means tolengage both dies; and means to in-' sure the presence-of, only a single blank between the dies at one time, all of said means being adjustable as a unit.

4. In a threading machine; a pair of dies; means for guiding blanks to the dies; means for pushing the blanks from the guiding means to engage both dies; means for preventing the escape of more than one blank at a time from the guiding means; and means to insure the presence of only a single blank between the dies at one time, all of said means being adjustable as a unit.

5. In a threading machine; a air of dies; hopper mechanism; means or guiding blanks from the hopper mechanism to the dies; means for pushing the blanks from the guiding means to engage both dies, the said means and hopper all being adjustable as a unit.

6. In a threading machine; a pair of dies; and means for guiding blanks to the dies, arranged so that the blanks will travel continuously in substantially the same plane at an angle to the horizontal, a portion of the path of travel being in a substantially straight line and another. portion in a curved path, the latter being adjacent to the delivery end of the guiding means.

7. In a threading machine; a pair of es; and means for guiding blanks to the dies t at travel continuously by gravity in a streamat an angle to the horizontal, comprism 1n part, a clutch mechanism that is curved a jacent to the dies and terminates in a plane that is approximately coincident with the face of the dies. I 8. In a threading machine; a palr of d1es;

,means for guiding blanks to the dies; means for pushing the blanks from the guiding means to engage both dies; means for pre- 100 holding/ venting the escape of more than one blank at a time from the guiding means; and means for holding the pushing means against movement while a blank is between the dies.

65 Within the scope of the appended claims, 9. In a threading machine; a pair of dies;

means for guiding blanks to the dies; means for pushing the blanks from the iding means to engage both dies; means or preventing the escape of more than one blank at a time from the guiding means; andmeans for holding the escape means against movement while a blank is between the dies. 10. In a threading machine; a pair of dies; means for guiding blanks to thedies; means for pushing the blanks from the uiding means to engage both dies; means for preventing the escape of more than one blank at a time from the guiding means; and means, as a movable member controlled in part by a blank between the dies, for holding the pushing means against movement while said blank is between the dies.

11. In a threading machine; a pair of dies; means for guiding blanks to the dies; means for pushing the blanks from the guiding means to engage both dies; means for pre venting the escape of more than one blank at a time from the guiding means; means, as a movable member controlled in partby a blank between the dies,- for holding the pushing means against movement while said blank is between the dies; and means for locking the movable member when holding the ushing means. v

12. In a threading machine; a pair of dies; means for guiding blanks to the dies; means for pushing the blanks from. the guiding means to engage both dies; and a rock member actuated in one direction by the blank between the dies that will engage and hold the pushing means against movement.

13. In a threading machine; a pair of dies; means for guiding blanks to the dies; means for pushing the blanks from the guiding means to engage both dies; and a rock member in the path of movement of a blank between the dies which is actuated by such blank and by reason thereof holds the pushing means against movement.

14. In a threading machine; a pair of dies; means for guiding blanks to the dies; means for pushing the blanks from the guiding means to engage both dies; and a rock member projecting over the open space between the dies and terminating adjacent to the extension limit of movement of the dies in the path of movement of a blank between the dies, which is actuated by such blank and by reason thereof holds the pushing means against movement.

15. In a threading machine; a pair of dies; means for guiding blanks to the dies; means for pushing the blanks from the guiding means to engage both dies; and means, comprising in part, a cut-ofl member actuated from the rushing means to prevent the escape of more than one blank at a time from the guiding means and so timed that the member is projected between the two blanks adjacent to the die in advance of the pusher means.

16. In a threading machine; a pair of dies; means for guiding the blanks to the dies; means forpushing the blanks from the guiding means to engage both dies; means to prevent the escape of more than one blank at a time from the guiding means; and an operative connection between the pushing means and escape means, whereby the escape means and in advance of the latter is actuated from the pushing means.

17. In a threading machine; a pair of dies; means for guiding the blanks to the dies; means for pushing the blanks from the guiding means to engage both dies;-

means to-prevent the escape of more than one blank at a time from the guiding means,

ing meansto engage both dies; comprising in part a slide, means to prevent the escape of more than one blank at a time from the guiding means ;.comprising in part a slide, and a cam actuated rook mechanism between the said slides, and so timed that the means to prevent the escape of more than one blank at a time from the guiding means will operate in advance of the pusher means'.

19. In a threading machine; a pair of dies; means for guiding the blanks to the dies; means for pushing the blanks from the guiding means to engage both dies; means to prevent the escape of more than one blank at a time from the guiding means; and an operative connection between the pushing means and escape means, whereby the escape means means for guiding lanks to the dies having a slot therein, through which the blanks travel; means for pushing the blanks from the guiding means to engage both dies; and means to prevent the escape of more than one blank at a time from the guiding means, the arrangement of said "means being such that when the escape means uncovers the end of said slot the pushing means is in front thereof. b

21. In a threading machine; a pair of dies; means for guiding the blanks to the dies, comprising in part a bracket adjustable in a path substantially perpendicular to the face of the dies; a second bracket having a similar adjustment and also movable toward "and away from the other bracket; and chute plates connectedwith said brackets.

22. -In a' threading machine ;-a pair of dies; means for guiding the blanks to the dies,-

comprising in part a bracket adjustable in a path substantially perpendicular to the face of the dies; a second bracket having a similar adjustmentand also movable toward and away from the other bracket; and chute plates connected with said brackets that are curved in the direction of their length and between which the blanks travel to the discharge end of the chute plates where they are successively discharged in substantially the same plane as the face of the dies.

23. In a threading machine; a pair of dies; means for guiding the blanks to' the dies, comprising in part a bracket adjustable in a path substantially perpendicular to the face of the dies; a'second bracket having a similar adjustment and also movable toward and away .from the other bracket; chute plates connected with said brackets, one chute plate being shorter than the other; and a guide plate forming an extension of the shorter chute plate and providing a support for the blanks while out of the chute and traveling a limited distance in a plane substantially parallel with'the-face of the dies.

24; In a threading machine; a pair of dies means forguiding the blanks to the dies,

' comprising in part a bracket adjustable in a path substantially perpendicular to the face of thedies; a second bracket having a simi= lar adjustment and also movable toward'and away from the other bracket; chute plates connected with'said brackets, one chute plate being shorter than the other; and a guide plate providing a support for-the blanks near the discharge end of the chute and in a path at an angle thereto while being presented be tween the dies.

25. In a threading machine; a pair of die means for. guiding the blanks to the dies, comprising in pa'rt a bracket adjustable in a of the dies; a second-bracket having a path-substantially perpendicular to theiface S1ml-. lar adj" stment and also movable toward and 'away from the other bracket; chute plates connected with said brackets; a fixed member forming a support forthefirst-of said brackets; and an adjustable member forming. a support for the latter of said brackets.

26. In a threadingmachine; a pair of dies;

a fixed bracket; a chute member adjustably connected-with the bracket; a second bracket adjustable toward and away from the first mentioned bracket; a chute member adjustably mounted thereon; and a chute plate con-. nected with'each of said chute members and positioned relatively to each other so asto leave an open space therebetween through which blanks travel. e 27. In a threading machine; a pair ofdies;

means for guiding the blanks to the dies, com

prising in part a bracket adjustable in a path substantially perpendicular to the face of the dies; a second bracket having a similar ad-' justment; chute plates connected with said -movably associated with one of said brackets.

29. In a threading machine; a pair of dies; means for guiding the blanks to the dies, comprising in part a bracket .adjustable in a path substantially perpendicular to the face of the dies; a second bracket having a similar adjustment; chute plates connected with said brackets; means to prevent the escape of more than one blankat a time from the guiding means, both of said means being movably associated with one of said brackets; and independent mechanism for moving both of said means in opposite directions.

30. In a threading machine; a pair of dies; means for guiding the blanks to the dies;

means for pushing the blanks from the guiding-means to engage both dies; means .for reciprocating the pushing means, comprising in part a rock-member; a connection between the rock member and pushing means; a cam for, actuating the rock shaft; and a connection between the cam and rock shaft.

31. In a threading machine; a pair of dies; means for guiding the blanks to the dies; means for pushing the blanks from the guiding means to engage both dies; means for reciprocating the pushing means, comprising in part a rock member; a connection between the rock member and pushlng means; a cam for actuating the rock shaft; and yielding means between the cam and rock shaft, wherebythe cam may continue to operate if move-. ment of the rock shaft is prevented.

32. In a threading machine; a pair of dies;

hopper mechanism; means for guiding blanks from the hopper mechanism to the dies;

. means for pushing the blanks fromthe guiding means to engage both dies, the said means andhopper all .beingadjustable as a unit; a shaft; and means for actuating the hopper from the shaft, comprisingq'intermediate positively actuated mechanism that will function in any ofthe adjusted-positions of the hopper.

33. In combination; a shaft;'a.hopper adjustable relatively to the shaft; and means v for positivelyactuating thehopper from the shaft irrespective of the relative position-0f the latter, comprising a carrier movably connected with the shaft; a pinion rotatably connected with the carrier; a hopper shaft; a connection between the shaft and the part upon which the pinion rotates; a pinion on the first mentioned shaft, the teeth ofwhich mesh into those of said pinion; and a gear associated with the hopper shaft, the teeth of which also mesh into those of the first mento tioned pinion.

34. In combination; a shaft; a hopper adjustable relatively to the shaft; ,means for positively actuating the hopper from the shaft irrespective of the relative position of 1 the latter, comprising a hopper shaft; a stud or the like connected with the carrier, the axis of said hopper shaft and stud being constant relative to each other; a connection between the hopper shaft and stud; and a train to of gears and pinions connecting the hopper shaft and shaft, one of such trains of gears being on the shaft, another on the stud, and another upon the hopper shaft.

35. In combination; a shaft; a hopper ad- 2 justable relatively to the shaft; means for positively actuating the hopper from the shaft irrespective of the relative position of the latter, comprising a pinion upon the shaft; a stud or the like carrying a. pinion 80 and movable around the axis of the shaft; a hopper shaft, having a connection with the stud, whereby the latter will maintain a constant position relative to the former; and a gear upon the hopper shaft, the teeth of which mesh into those of the pinion upon said stud.

36. In combination; a shaft; a hopper adjustable relatively tothe shaft; means for positively actuating the hopper from the shaft irrespective of the relativeposition of the latter, comprising a carrier journaled on the shaft; a. stud or the like fixed in the carrier and occupying during the movement of the carrier a position wherein the axis thereof is relatively constant with that of the shaft; pinions connecting the shaft and stud; a hopper shaft having a movement about the axis of the shaft independent of the carrier; a connection between the hopper shaft and stud; and a gear upon the hopper shaft, the teeth of which mesh into those of the pinion on the stud.

37. In a chute, the combination with a cover plate shorter than the chute; of a latch movably connected therewith and forming an extension of said plate.

38. In a chute, the combination with a cover plate shorter than the chute; of a latch movably connected therewith and forming an extension of said plate; and means for locking the latch against accidental movement.

In testimony whereof, I have hereunto affixed my signature.

RICHARD LESTER WILGOX.

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