US78105A - Improved maohiie foe,, foemiig sheet-metal waee - Google Patents

Description

4 Sheets-Sheet 1.

N. C. LOMBARD & M. BRAY. MACHINE FOR FORMING SHEET METAL WARE;

Patented May 19, 1868.

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4 Sheets-Sheet 2.

N. 0. LOMBARD & M. BRAY. MACHINE FOR FORMING SHEET METAL WARE.

No. 78,105. Patented May 19. 1868.

4 Sheets-Sheet 3;

N. 0. LOMBARD & M. BRAY. MACHINE FOR, FORMING SHEET METAL WARE. o. 78,105.

Patented May 19, 1868.

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4 Sheets-Sheet 4.

N. G. LOMB-ARD & M. BRAY. MACHINE FOR FORMING SHEET METAL WARE.

No. 78,105. Patented May 19. 1.868.

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N. C. LOMBARD AND ,MELLEN BiRAY, OF' BOSTON, MASSACHUSETTS, ASSIGN- OliS TO MELLEN BRAY.

Letters Patent No. 78,105, dated M'ay 19, 186B.

mesovso MACHINE FORJFOR-MING SHEET-METAL WARE,

vT0 ALL WHOM IT MAY CONCERN:

Be it known that we, N. C(LOMBARD and- MELLER BItAY, of Bostomin the countyof Sulfolk, ahdstate of Massachusetts, have invented new and useful Improvements in Machinesfor Forming Sheet-Metal Waie, th e' same being improvements on a machine invented byMELLEN BnAY, for, which Letters Patent were granted to him, December 12, 1865, and numbered 51,421 and we do hereby declare the following to bee full, clear, and exact description otthe same, reference being bad to the accompanying drawings making apart of this specifi cation, in which- Figure 1 is a side elevation of a machine embodying our improvements.

Figure 2 is a sectional plan, the cutting-plan bcing on line 1 2, on figpl.

Figure 3 is a vertical section on line 3 4,011 fig. 2. l

Figure 4 is a front elevation.

Figure 5 is-a transverse section through clutch on line 5 6, on fig. 4.

Figures 6 and 7 are details, showing the construction of the femaleidic for'forming boxes and other articles having vertical sides. I

The subject-matter of our invention relates; in the first place, to the mcchanism by which the dies are operated and controlled, and consists I First, in the use, in connection with a vibrating-shaft, of one or; more cranks, keyed orotherwise made fast to said vibrating-shaft, so as to vibrate in unison with it, and carrying on their oiitcr'e'nds friction-trucks, working inslots in side-levers, said levers being attached to theframeof the machine below the vibrating-shaft by'means of fulcrum-pins at their lower ends, whilc'the upper ends (if said lovers are connected, by means of connecting-rods and wrist-pins, to the side toggles that work the shell. Said lev'ersare madein two pieces, the

secondary one being pivoted to the principal piece near the middle of its length,-and provided with a. groove "or path, extending nearly the whole length of the lever, in such a manner that about one-half of the path shall be made in the metal of the principal piece, while the other half, more or less, as the case may he, shall be made in the metal of the movable piece, and thctwo shall beso connected as tamake one continuous path or groove, of.

a length sufficient to allow the friction-truck to travel the whole distance necessaryfor forming the deepest dish, while at the same time one portion of the path may be" adjusted so as toalter the'sha'pe of the path, and consequently vary the movement of the toggles that control-the movement of the shell. It does not follow that the path must be made of just such a form as is represented in the drawingQ-but it is evident that it maybe made straight,'in the form of an arc of a circle, or curved in any form required to give the, necessary movement to the toggles, without at all affecting the principle. g g i It also consists, in the second place, in the application of adjustabledogs'to the said vibrating-shaft, and working in conjunction with the vibrating-cranks above mentioned, for the purpose of operating thecentral crank, which is fitted to said shaft in such amanncr as to be free to move independently of said. shaft eiroep't when acted upon by one or the other of' said dogs.

Thirdly, in the use, in connection with the above mechanism, of a crank on the main gear-shaft, having an adjustable crank-pin, the purpose of which is to enable us to regulate the movement of the dies, and proportion their movements according to the depth of the dish, by increasing or diminishing the amount of the vibration given to the shaft. i i

Fourthly, in theapplication of adjustable wedges to the under sides of the blocks, to which'the lower ends of the toggles are attached, in such a manner thatyhvhilc the wedges are free to be moved out or in, they are so attached to the base of the machine in which they move, and also to'the blocks to which the toggles are attached, that the blocks are prevented from being lifted by the action of the toggles, the purposcof said wedges being to regulate the pressure of the dies, and also, in the case of the central one, to be used, in conjunction with the adjustable crank-pin above mcntioned, to regulate the motion of the plunger and forming-die.

"w, on the cranks W W.

:Fifthly, in so co'nstructlngthe' plunger that operatesthe forming-dies, and so fitting it to the shell, that 'lvhen the shell is in itslowest position the plunger shall rest upon the shell, and when the shell is moved up by the operation of the side toggles the plunger shall move with it, so that the top'of the male forming-die attached to the plunger, and the top,of 'the holding-die, attached to the shell, shall bear the'same relation to each other till the upward movement of the shell hasoeased, and theblanl; is firmly held between the holding-surfaces.

Sixthly, in a peculiar construction ofolutch, by which itis made companatively elastic or yielding, by

which the conoussio'n caused by throwing the clutch into gear is greatly reduced The subject-matter of our invention-relates, in the second place, to a device for relieving the-toggles from a portion of the strain and shock attending the downward movement of the shell and plunger, andlconsists in placing under each end ofthe shell as stop-bar, -rcsting on powerful -springs, s'o arranged that the height of the bar may be varied toadapt it to the varying-movement ofthe shell, when the. sameis varied to adapt it to the depth of dishto be formed.

7 Our invention relates, in the; third place, to'a'die for forming such articles as have vertical sides, such, for instance, asblaelring and pill-bores, and consists in the insertingi-n thefemale die of a series of spring-catehes,= arranged radially around the opening in' the die in such a manner that their inner ends shall'project slightly into the opening, but so made that while they shall present no impediment to the upward movement of the male die, they shall. act to preventthe dishfrom. being drawn down again with the male die, and hold itin suspenon till the next operation of the machine. I

In, the drawings, A is the base, B the columns, and C the cross-head, all bolted firmly together by the tie bolts D, and forming the arch, within which the work .of forming the dish is'performed E is-the shell, which carries the male cutting and lbwerholding-die F. Gis the plunger,,c.-.rryi ng the male forming-die H. I Iare the side toggles, that operate the-shell, and J is the central toggle, that operates the plunger The upper portion of the plunger G is made larger-in diameter than the lower portion, so as to form a shoulder. at a, and

the shell is bored out to fit the two diameters of the plunger, and so that the shoulder a of the plunger shall rest on a corresponding'shoulder formed in the shell, 80 that when theshell is moving up to .cut and hold the metal the plunger shallbe moved up with it.

. K K K are th e' blocks, to which the lower ends of the toggles are ,attache.d,'and which are connected to the;

wedges b, b. and c, by means of lips, 02 dyfittingto'dove-tailed grooves in the upper corners of the wedges, as. shown indottedlinesatd, i'n fig. 4, and utf, in fig. 3. The wedges b, b, and c are also provided with lips, g g,

ontheir lower corners, which fit in corresponding grooves in the base, A, bywhieh means they are prevented from being lifted up by the movement of the toggles. h' h are the screws, for adjusting the wedges b b, and are operated inv unison by means of the ratchet-whcels it, the pawls v 7' j, levers It It, and the link l.-' m is the screw for adjusting the centre-wedge c, and is. operated by the hand-wheeler. I

IrL are the side-frames of the machine, on which are the bearings for the shafts. M'is an independent stand,

' forming the outer bearings ofthe pinion or driving-shaft N, the inner bearing of which is on one of the side frames of the machine. 0 is the fly-wheel and driving-pulley. Pis the clutch and pinion, made'in three parts,

with powerful springs interposed between two of the parts, as shown at o in figs. 2 and 5, in such a manner that when that portion,.p, which is splined to the shaft in the usual manner, and is clasped by theshipper-ferkq, is

thrown into gear with the portion r wh'ich is next to it onthe shaft, the springs o 0 will, ,be compressed, and; cause the pinion t to be startcdmor'e gradually,and thereby greatly diminish the strain on the teeth oi the gears, and other parts of the mechanism, occasioned by throwing into gear a "perfectly rigid and unyieldingv clutch. I g I The tension of the springs may he adjusted'by means of the sct-screws'u u acting on the washers u u, inserted in the recess back of the springs. Q is'the large gear, mounted on the shaft R, on the opposite end of which is the crank, S, carrying an adjustable-crankpim; is a connecting-rod, by means of which, and the crank, U,'motion is transmitted from the rotary shaft Rte the vibratingshat't V. W W are two cranks,-keyed firmly to the shaft V, imd provided-with friction-trucks, u) at, on their outer ends, to work in the paths orgrooves in the oscillating side-levers X X, and also provided with the lugs a: w and set-screws ,1] y, by means of which the (logs Y'Y, fitted tosaidshaft by the side of the cranks W W,. arc adjusted 'to the required position, and then madeto' move in unison with the-said cranks,'as' though they were a part of the some casting. X X are two oscillating side-levers, each made intwo pieces, the principal of which is attached to the frameof the machine by means of the fulcrum-pin z,'on whioli it is free to oscillate, as it isope'ra'ted upon by the friction-trucks w H At or near the middle of the levers- X are pivoted ,tothe same the secondary pieces Z'Z, in such a mannerthatthe opposite endis free to move when acted upon by the set-screws :i'z, working in the lugs a, a, cast on the principal pieces X X, so that they may lie-adjusted at the pleasure of the operator, as the circumstances of the casemay require. I v I I Said oscillating-levers are each provided with a groove or path extending about equal distances above and belowthe centre line of the vibrating-shaft V, and of suificient length to allow snliicientscope or throw to the vibrating-cranks W W, to give the require'd throw to form the. deepest dish.

Said path may he made of various formsydifferinglfrom those shown in'tho drawing, its, for instance, that portion which is castin the principal portion'cfthe lever, and which we have represented as being straight in the drawings, may be -madean are of. a circle, or in tho-form of an increasing or diminishingcurve, according the time of the buildeholf to adapt itte any peculiar movement that he'wishesto obtain. Also that portion of the path contained in the'adjustnblc pieces Z Z may be mado of a diil'erent form from that represented in the 'drawingg if it is found necessary to have the relief not more abruptly at any point while the dish is being ormed v To that end of the levers X X, oppositeto thefulcrum-pin, on which they oscillate, is attached one end of the connecting-rods A A, through which the motion of the oscillating-levers is transmitted to the side, toggles I I, to straighten them and move the shell and lower cutting and hoIding dies up to the blank, and hold it firmly between the holding-dies.

B is the central crank, so fitted to the vibrating-shaft that it is free to move independently of the mowement of the shaft, except when controlled the dogs Y'Y,'and connected to the central toggle bymeans of the connecting-rod G. D D are the stopbars, placed o ne under each end of' the shell, and resting on the uprights E E, which have hearings in the lugsor ears F F, cast on the base, A, which serves to keep them in an upright position. G G are collars, fiitted tc the uprights E E .by means of a screw-thread, so that theymay be adjusted to any required height. Between the collars G" G and the lugs or cars F F are placed the powerful springs H H. p l l a V The collars G G are to be adjusted so that when'the spring is expanded, the top of the stop-bars shall be slightly ab ove the line to which the bottom of the shell should come when it is moved down by the actionofthe toggles upon it, so'that alarge portion of the shock that would otherwise be received by the toggles shallbe transferred fi'om the toggles to the springs H H. v g In figs. (land 7 is'shown the. manner of constructing .the female cutting and forming-die when the article to be made has vertical sides, 6 is the cutting-die; c, the holding surfacefd, the fingers that pick the'diah'oii of the male die, and hold it in suspension while the male die recedes; e e are the springs which hold the fingers to their work.

The operation of, our improved machine is as follows; The machine being at rest, with the shell and plunger in their lowest position, the metal to be operated upon is placed upon the surface of the cutting and holding-die. If the foot be now placed upon the treadle, and the clutch thrown-into gear, the pinion, acting upon the large gear,

revolves its shaft, and the crank, with the adjustablecrank-pin, havinga rotation given to hit, transmits its motion to the longer crank on the outer end of the shaft V, and gives to said shaft 11 vibratory motion of greater or less extent, according as the adjustable crank pin is nearer to or farther frcm the centre of -t h e gear-shaft. When the shaft V begins to vibrate, and'while the, trucks on the'outer ends of the cranks W W mirth-,1. ling in that portion of the path cast in the principal piece X X of the oscillating-levers, their-upper ends are thrown back-further from theshaft V, and, drawing upon the' counecting rods A lhflstraightcn the toggles I I, and raise the shell and male cutting-die until the blank is cutand firmly held between the holding-dies.

In raising the shell by this operation, the plunger has also been raised the same distance, partially straightsuing the toggles to which itis attaohed and also acting through the connecting-rod A to move the 'crank 13'.

Just at this point, when the friction-trucks on the cranks W W have arrived at the point where the adjustable pieces, Z Z, are pivoted to the oscillating-levers X X', and the shell has arrived at its extreme upwardiposit'idn, thedog Y comes in contact with the surface on the central crank B, provided for the purpose, and shown it; dottedlines at f, and compels it to travel with the shaft until the motion of the shaft in that direction cease'si,

which motion straightcns the central to gles and forces the plunger upward, and, forcing the maleformingdie,

O r with the metal, 'into the female-forming-dic, forms the dish or other article to be made.

In this process, if .themetal were held rigidly by the holding-dieswithout anyr elief, the metal would be torn asunder on'aecou nt of thc tendency to gather into wrinkleswhilc being formcd ,whi ch tendency causes the metal to become thicker at the edge, and thereby-increases the pressure; but just when the plunger commences tomove' upward independently of the movement of the shell, the friction-trucks.onithc cranks W pass into the adjustable portion of the slot'or grooves in which they travel, and asthey are so adjusted as to be a little cccentricto the shaft, when the trucks have arrived-at this point, the continuation of the movement causes the lovers X X to be thrown still farther back, and breaking the toggles from a straight line, allow'the shell, with the lower holdingsdie, to drop enough to relieve the pressure and allow the metal to drawin, and thusxprevcnt its breaking. 4

When it becomes necessary to adjust the machine for forming a dish of less depth, the adjustahle'crank- PliL'L' is moved in its crank toward the centrc'of the shaft R until its throw will give just suflicie'nt' vibration to the shaft V, so that the movement of the cranks W Wfrorn their upper position to ahorizontal position, shall give a motion to the shell equal to the depth of the dish, plus the amount of spacethat it is desirable to have for clearance in removing the dish from the dies. p l i The wedge under the toggle that operates the plunger should now be drawn out, by means of its screw and hand-wheel, a sufficient distance tn drop the block to which the lower end of the toggle is attached a distance just equal to the di-tferoiicebctween the depth of'the dish previously formed and the depth of the one that it is' now desirable to form.

Then turn the machine around until the cranks W W have arrived atthei'r lowestposition, and their more. mcnt in that direction ceases; then 'stop-the motion of the machine and adjust the dog Y on the shaft, bymeans of the set-screws on the cranksWW, until it raises the central crank B, until the centre of the shaft V and the centre of the pins by which the connecting-rod A is attached to the central toggle and to. the central crank, are in line, when the machine is ready for OPBIll-hlOfl." p

The advantages claimed for this arrangement of mechanism foroperating and controlling thedies over that used in the machine patented by-MELLEN Bun, as above referred to, are, first, it is cheaper; second, it works smoother; and thirdly, its adaptability to longer throws; or, in other words, with this arrangement we are enabled tov get throw enough to the dies to make the deepest dish, while with that it would be impossible to make a very deep dish without making-am'cnormously large machine on account of the limited amount of throw 7 that can be obtained by means of the cams and carriage as used in that machinc.-

Having thus described onr improvements,.on'd explained their operationywhat we elaini as new, and wish to secure by Letters Patent, is---' 1. Imperting the motion ofthe vibfatihg-sh i't Y to the side-toggles that operate and control-the motion of the cutting and holding-dies by mean's of the vibrating-monks W'W and the oscillating slotted levers X X, substantially as described.

2. So constructing the oscillating-levees XJX that a portion of the slot or path may be adjusted, sii'bstan tially as described.

3,. The combination of thevibrating-ei'anks W W with the central crank B by means of adjustable dogs or stops Y'Y, substantially as described;

' 4. Theyielding stop-bars, for arresting the downward motien of the-shell end plunger; substantially as described.

5; The spring-fingefs d, oi their equivalents, 'for remoiring the dish from the male forming-die, substantielly as described.

'6. Wo donot claim, broadly, wedges placed nudes-toggles for adjusting the some, for we a re aware that snch have been used before; but whot'we claim, is the nse of wedges under toggles for adjusting the pressine of .the same when. they are so attached to the toggles, and to the base in which they slide; that they maybe'fr eely uioved out or in, while at the same time they hold the toggles firinlyin their pioper relation to the has e, and prevent them from being .disconneetedfrom the'same. I V 7- Fitting the plunger G to the shell E insueh a mennei that th'e plnngel shall rest upon the-shell, end be moved with it when the shell is moved up by the notion of the side-toggies, substantially as'deseribed'. v

In testimony whereof, we have signed our names to this specification before'two shhscrihing witnesses.

' N. c. LOMBARD,

MELLEN BRAY. I

Witnesses:

Giuse- Jommn, DAVID PRAY.

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