US1496480A - Control mechanism for end matching machines - Google Patents

Description

" June 3,, 1924.

C. J. MARSHALL CONTROL lmclunusn Pen an!) rwrcmus MACHINES Filed April 14 1923 4 Sheets-Sheet 1 June 3 1924. 1,496,480

c. J. MARSHALL CONTROL HEdHANISM FOR END MATCHING MACHINES Filed April 14. 1923 4 Sheets-Sheet 2 June 3 1924- C. J. MARSHALL con-ram, uncx-mmsm FOR END MATCHING mcmrms Filed April 14 1923 4 Sheets-Sheet 3 W Q BW hm q Ml 0 0 W I: 1 mm mm Q 1 I \J\ 1:59

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Sheets-Sheet 4 QDN NN NR.

Filed April 14 1923 Qb Nb win/adj Patented June 3, 1924.

UNITED STATES PATENT OFFICE.

CHARLES J. MARSHALL, or BELorr, wxsconsm. assmnon. r0 1'. 1a. YATES MACHINE COMPANY, or smart, WISCONSIN, A oonromrmn or wrsoonsm.

CONTROL MECHANISM son min-transitive macmrms.

Application fileii April 14, 1923; Serial Ne. 681 972;

To (171 HF/LONE it may cmwcrn Be it known that I. (Rooms Jone: Mensnium a citizen of the United States, residing at Beloit, in the county of Rock and State of ll isconsin, have invented certain new and useful Improvements in (lontrol Mechanisms for End Ma tching Machines, of which the following is a specification.

The present invention relates to novel means for controlling or governing antematically the action of end mate-hers designed to provide the tongues and grooves on the ends of boards. and other mechanisms of similar character.

Its purpose is to stop the operation and feed of the matcher automatically if a board enters it improperlv, as by becoming clogged between the board advancing" lugs on the endless feed chain and the piessnre or gauge h ars above it, the mechanism also having correlative means to permit tlie-rerersal of the motion of the conveyor chain to release the 'amined board.

The improved appliance is of simple structure and economical to produce, and acts also as a safety appliance in case the hand of the operatorljecomcs caught in the mechanism, whereby the operation of the matcher will stop before injury can be done to such member of the workman.

In order that those skilled in this art may have a full and complete understanding of the invention, and its various benefits and advantages, I have illustrated in the accompanying drawings, forming a part of this specification, a desirable and preferred embodiment thereof, like reference charac-- ters referring to the sameparts throughout the several views.

In these drawings:

Figure 1 is a side elevation of an end matcher equipped with the improved and novel control mechanism;

Figure 2 is a plan view of the endmatohcr;

Figure 3 is an end View of the same;

l 'ignre 4 is an enlarged elevation of a portion of the a pliance showing more particularly the en less-chain feeder. the pressure-bars. and the control mechanism Figure 5 is a horizontal section on an enlarged scale on line 5-5 of Figure 7;

Figure 6 is a similar horizontal section on line tl-6 of Figure 7 Figure 7 is an enlarged elevation tion of the trip device.

Referring to these drawings, it will be seen that the machine includes a suitable framework 2 1 of appropriate daign and form and that on this in suitable manner, are mounted two horizontal, spaced, parallel shafts 22 and 28, the latter being adjustah-le, by suitable screw mechanism, to Ward and from the former.

Shaft 22 has fixed thereon a fitting sprocket-Wheel constmction 24 cooperating with an endless sprocket-chain of specific construction the links sewer -e equipped with internal teethadirptcd to he accommodated in recesses 27 of the spmc-ltet whiyel the companion shaft 23 having an appropriate, chain-supporting roller or drum 28 of suitable formation around which the links of the chain are adapted to pass in convenient manner.

This endless-chain feeder constitutes the subject-matter of my ctr-pending patent application SerialNumber {531,973, filed April 14, 1923, and neerlf-not here be further detailed. V

A sprocketwrheeh29on the other and 0t shaft 22' is driven by means of a sprtfioleetchain '31 encircling the same and also extending around a smaller sprocket-wheel 32 on another shaft 33, rotatable in bearings 34- and 35, and driven from a lower shaft 38, revoluhle in bearings 39, 41 and 42 by means of intermeshing gears 36 and 37.

sllaft s is fitted with two pulleys 43 and 44in line with a pair of pulleysflti and 46 011 21 drive-shalt 4? revoluhle inh'earings 48 48.

l ulley 45 is designed to rotate shaft 38 by of a pormeans of a belt 459 cooperating with the two gililleys, and pulley 46'is intended to rotate t e shaft 38 in the opposite direction "by a crossed belt '51 co-acting with the pulleys 46 and 44.

Drive shaft 47 is revolved in any aproved'manner, as torinstame by a main pulley 52 cooperating with any convenient source of power by a belt, not shown.

A belt-tightener pulley '53 on an arm 54 loose or rockable on shafi 55, oscillatory in bearings 58 and 59. is normally held up against the lower stretch of the drive belt 49 by means hereinafter described, whereby such belt normally maintains operative driving connection with its two pulleys and 43.

I n somewhat similar manner the belttightener pulley 56 is mounted on an arm 57 fixed to shaft and is ordinarily above the crossed belt 51 sufficiently so that the latter does not drive the shaft 38 until such pulley is pressed or forced down upon the upper stretch of the belt in a manner hereinafter indicated.

Shaft 55 has fixed thereto a bifurcated or double-arm memberi61 rockingly connected to a horizontal rod 62 which extends forwardly through holes in the base of the ma chine, and, in the front of the latter, it is connected to an arm 65 fastened to a rockshaft 66 oscillatory in bearings 67 and provided with a pedal 69.

Rod 62 is surrounded by a coiled expansible spring 63 hearing at one end against a portion of the frame and at its other end against a collar 64 fastened to the rod, whereby the expansive action of such spring normally maintains the pedal elevated and the pulley 56 in inoperative relation or elevated position with respect to the crossed or reverse belt 51.

Above the endless chain-conveyor 25, the machine is supplied with two, spaced, parallel. horizontal pressure-bars T1. 71. and beneath'these the frame or table is supplied with two flexible metal bands or strips 72 below each of which is a plurality of upwardly-pressing spring-operated plungers 73 which. as the boards travel above them, through the flexible bands press such boards up against the under faces of the gauge bars 71, this being a known construction and constituting no part of the present invention.

The top faces of the alternate links of the conveyor-chain are fitted with transverse board-feeding lugs Tel, 'M longer than the width of the chain so that their terminal portions extend and travel over the flexible bands 72, 72. these lugs or blocks being provided for the purpose of engaging the edges of the boards and feeding them forwardly beneath the pressure or gauge bars in a manner well understood in this art.

Two, parallel trip- bars 76, 76 are pivoted to the front ends of the horizontal gauge or pressure bars 71, 71 and are ordinarily held in substantially horizontal position in register with the bars 71 by means of two rods 7 8 (one for each bar) pivoted thereto at 7 9 and extended upwardly through apertures in a bracket 81, being equipped above each bracket with limiting or stop nuts 80 which determine the extent of descent or position of the trip-bars 76. a spring 77 being interposed above each bar 76 between a shoulder on its rod 78 and the under face of the bracket 81, such springs permitting upward swinging of the bars 76 and acting to return the latter to normal position as soon as any obstruction beneath them passes by.

The upper ends of the rods 78 are beneath lateral extensions 82 on a member 83 rockingly mounted on the bracket 81 at 84 and provided with an upstanding projection 85 connected by a link 86 to an arm 87 fast on an appropriately-mounted, cross, rock shaft 88 equipped with a hook 89 pinned or otherwise fastened to its other end at the opposite side of the machine.

This oscillatory hook is designed to co-act with another hook member 91 on an upright rod 92 vertically slidable in hearings or two separated blocks 99 screwed into the frame of the machine.

Rod 92 has pinned thereto an apertured plate 93 with a pair of feet 94, 94 hearing and slidable on the adjacent face of the frame of the mechanism, and another rod 95 extends through a hole in such member 93 and is supported on a spring 97 encircling that portion of the rod 95 above the part 93 and bearing at its lower end on the latter element, the rod being fitted with nuts 96 resting on the top end of the spring.

The lower end of this vertical rod 95 which is bent horizontally is pivotally connected at 98 to the loose arm 54 and is designed to hold the belt-tightener pulley 53 up against ,the bottom stretch of the belt 19.

An upright flat bar 101, at the side of the rod 92, has its lower end bent inwardly to provide a foot 102 which is apertured to receive the rod 92, and it has an arm 103 riveted thereto and pulled downwardly by a coil, contractile spring 104 having its upper end secured thereto and its lower end fastened to the frame of the machine at 105.

The upper end of this bar 101 is pivotally connected to one arm of a bell-crank 106 fulcrumed on the frame at 107 the complementary arm of the bell-crank being connected by a link 108 to an arm 109 rigid with a shaft 111 oscillatory in a air of bearings 112, 112 at the front of t e machine and fitted at one end with an operatin handle 113.

Tliis end-matcher is supplied with the usual cutoff saw 121 rotated by means of a belt 122 encircling a pulley 123 on shaft 47, the belt being maintained tight by a pulley 124 cooperating with its upper part.

The machine is also fitted with one or more saws to provide the tongues or grooves on the ends of the boards. but these have not been shown since they are a well known part of the construction. They are, however operated from pulley 125 on shaft 47 through the action of a drive belt 126.

Under ordinary or usual conditions the rod 92 is held in the elevated position deunease picted'in Figures 1 and 7 by reason; of the the lugs 74. to carry the boards. 200 forwardly under the gauge or pressure bars, such boards being placed in position on the feed chain or endless bed by the operator.

Under regular circumstances. the pulley.

56 is in such position by reason of the action-of spring 63 that it does not render the crossed-belt operative.

Under these conditions, the boards: 200 when properly placed by the operator on the conveyor or feed chain pass beneath the gauge pressure bars 71 against the bottom fiacesof which they are held firmly pressed by the plungers 73, andas they are carried along by the lugs or blocks 74 on the conveyor-chain their ends are severed by the saw 121 and the other saw or saws, not shown, provide such square ends with either tongues or grooves as the case may be.

If' an unduly thick board should. pass beneath the members 7 6, or if a board should travel below such members on top of one of the lugs 74, or if the operator should accidentally permit his hand to pass beneath one of the elements 76- on top of one of the boards or lugs, these parts 76 would: be automatically raised against the action of their springs 77, and, through the-connections described, they would rock the shaft 88 to release the hook 89 from the book 91, in consequence of which, due to the downward pull on the rod 92, it and its companion rod 95 quickly descend permitting the roller or pulley 53 to become sufiiciently lowered to render the belt 49 inoperative, whereupon, this driving connection of the machine having been rendered inoperative, the feeding operation of the machine as a whole stops, although the saws may continue to revolve.

The member 92 in thus descending, carries with it the block 93 and the downward movements of these parts is arrested when such element engages the inturned end 102 of the bar 101.

In order now to release the jammed board or boards, or the operators hand if such has by accident become caught, the workman steps on the pedal 69, depressing it, thereby rocking shaft 55 so as to press the roller or pulley 56 down on to the crossed belt, whereupon the operation of the feeding mechanism is reversed and the chain-conveyor backed up, thus releasing the jammed board or the operators hand.

As soon as this has occurred, the operator removes his foot from the pedal, and, by

pulling forwardly on the handle 113, raises the bar 101 and at the same time the companion rods 92 and 95 until the former becomes again hooked to. the latch 89, the latter now being in position tor co-action therewith by reason of the removal of the improperly placed board, which permits the. parts7'6; to respond to the action of their sprin s 77 and assume their normal horizonta position.

Such return of the rods 92 and 95 to elevated position of course restores the belttightener pulley 53 to normal operative relation with its belt 49*, thus again establishing proper forward driving connection with the matcher.

As soon as the operator releases handle 113 it. automatically rocks back to its usual elevated position as shown in Figure 1 by reason ofthe; contraction of spring 104.

It will be readily seen, therefore, that the operator through the use of the pedal. and the handle has full control of the machine and may quickly release any jammed boards hence readily restoring the machine to normal or natural operative condition.

The tripping of the mechanism is wholly automatic, but its restoration toordinary active condition depends upon the operator working the parts as specified above.-

This invention is susceptible of a variety of satistactory embodiments and the one illustrated and described may be modified within more or less radical limits without departurefrom the heart and essence of the invention and without the sacrifice of any of-its substantial benefitsand advantages.

I claim:

1. In a lumber endmatching machine, the combinationof means to feed boards forwardly to the matching mechanism of the machine, a trip to stop the action of said feeding means automatically upon the oc currence of abnormal conditions, means to reverse the direction of feed of said feeding means to permit the operator to remove the abnormal condition, and means permitting the restoration of said feeding means to normal untripped operative condition to permit continuance of the customary forward feed of the boards only after such removal of the abnormal condition.

2. In a lumber end-matching machine, the combination of means to feed boards forwardly to the matching mechanism of the machine, a trip to stop the action of said feeding means automatically upon the occurrence of abnormal conditions, footoperated means to reverse the direction of feed of said feeding means to permit the operator to remove the abnormal condition. and means at least in part manually-operated to restore said feeding means to normal untrippcd operative condition to permit continuance of the customary forward feed of boards only after such removal of the abnormal condition.

3. In a lumber end-matching machine, the combination of means to feed boards forwardly to the matching mechanism of the machine, a belt-drive for said feeding means, a trip to render said belt-drive automatically inoperative upon the occurrence of abnormal conditions, a normally-inoperative belt-drive to reverse the direction of feed of said feeding means, means to render said reversedrive temporarily operative to permit the operator to remove the abnormal condition, and means permitting the restoration of said forward-feeding belt-drive to normal untripped operative condition to permit continuance of the customary forward feed of boards only after such removal of the abnormal condition.

I. In a lumber end-matching machine, the combination of means to feed boards forwardly to the matching mechanism of the machine, a belt-drive for said feeding means, a first belt-tightening pulley to co-act with said belt-drive, trip means normally holding said belt-tightening pulley in co-operative relation with said belt-drive, means to release said trip means automatically upon the occurrence of abnormal conditions to effect *1 the cessation of forward feed of said feeding means, a normally-inc erative belt-drive to reverse the direction of feed of said feeding means, a second belt-tightening pulley to cooperate With said second belt-drive, means to render said second belt-tightening pulley active on said second belt-drive to permit the operator to remove the abnormal condistretch of said belt-drive, trip means normally holding said belt-tightening pulley up to render said belt-drive operative, means to release said trip means automatically upon the occurrence of abnormal placing of stock on said conveyor to cause the cessation of forward feed of said conveyor, a normally-inoperative crossed-belt drive for said conveyor to reverse its direction of feed, a second belt-tightening pulley adapted to cooperate with said crossed-belt drive, pedal 1 means to render said second belt-tightening pulley operative on said crossed-belt to temporarily reverse the direction of feed of said conveyor to permit the operator to remove the abnormal condition, and means at least in part hand-operated to restore said first belt'tightening pulley to normal untripped operative condition to permit continuance of the customary forward feed of boards only after such removal of the abnormal condition.

In witness whereof I have hereunto set my hand and seal. a

CHARLES J. MARSHALL. [L.s.]

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