US1046106A - Sheath-applying means. - Google Patents

Description

F. N. PALMER.

SHBATH APPLYING MEANS.

APPLIOATION FILED MAR. 17, 1910.

Patented Dec. 3, 1912.

4 SHEETS-SHEET l.

F. N. PALMER. SHEATH APPLYING MEANS.

APPLICATION FILED MAR. 17, 1910.

Patented Dec. 3, 1912.

P. N. PALMER.

SHEATH APPLYING MEANS.

APPLICATION FILED MAR.17,1910.

Patented Dec. 3, 1912.

Z /Z. '7 F575. 70 72 F {J [y 69 .JrENT OFFICE.

FRANCIS N. PALMER, or' KENOSHA, WISCONSIN.

SHEATH-APPLYING MEANS.

Specification of Letters Patent.

Patented Dec. 3, 1912.

Application filed March 17, 1910. Serial No. 549,826.

To all whom it may concern:

Be it known that I, FRANCIS NI PALMER, a citizen of the United States, residing at Kenosha, in the county of Kenosha and State of "Wisconsin, have invented a new and useful Improvement in Sheath-Applying Means, of which the following is a specification.

My invention relates particularly to means f or applying a sheath or jacket to steel tubing, or the like, as, for instance, a brass covering to a steel tube for bed construction purposes.

My primary object is to provide improved means of the character indicated which will operate in an improved manner in forming a sheath from a brass ribbon, or other sheathing material, and applying the same to the steel tubing or objectto be sheathed.

A further object is to provide an improved method of effecting sheathing of tubes or like bodies, whereby inspection of the working during process of construction is rendered feasible, thus enabling abortive operation to be instantly detected and the defect remedied, and, also, facilitating the work of repair as well as increasing greatly the durability of the apparatus employed.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a broken plan view of sheathing apparatus constructed in accordance with my invention; Fig. 2, a broken side elevational view of the same; Fig. 3, a plan view of the ribbon guiding and flange forming dies, with the upper die-blocks removed: Fig. 4, a rear elevational view of the same, with the upper die-blocks in place; Fig. 5-,a vertical sectional view, taken as indicated at line 5 of Fig. 3; Fig. 5, an upper, front perspective view of a small diesection which aids in the final portion of the operation of forming the dovetail 'for mat'ion at one lateral edge of the sheathingstrip, and which die section, for convenience, is formed separately from the rear upper die-block at that side of the course of the sheathing-strip; Fig. 6, a broken transverse section taken as indicated atline 6 of Fig. 1; Fig. 6 a broken section showmg a fragment of the lower the shown in Fig. 6, the section being taken as lndicated at line 6 of Fig. 1; Fig. 7, a section taken.

as indicated at line 7 of Fig. 1; Fig. 8, a -.L(i1fin taken as indlcated at line 8 of F1g. 1; Figs. 9 and 10, bottom views, respecserv ng ing theinterl'ocking tongues and imparting tively, of the upper die-blocks flanking the course of the sheathing-strip; Fig. 11, a view mainly in elevation, but partly in section, of the die in which the locking tongues,

or hooked flanges, of the sheathing-strip (formed in passing through the dies at the left-hand end of Fig. 1) are brought into interlocklng relation and mashed together somewhat; Fig. 12, a front end view of said 1d1 e; Fig. 13, a rear end view of thesame; -F1gs. 14, 15 and 16, sections taken as indicated at the corresponding lines of Fig. 11,

the steel tube and its sheath being shown,

also; Fig. 17, a broken plan view of a forming die serving to preliminarily roll the edge-portions of the sheathing-strip up as said strip enters the tube-former; Fig. 18, a rear view of the same taken as indicated at line 18 of Fig. 2; Fig. 19, a sectional view of the product as itissues from the die shown .in Fig. 11 and enters the finishing dies; and Fig. -20, a broken section showing a fragment'of the finished product.

In the construction illustratedfA represents a bed or frame; B, a flangeforming group of dies carried by a plate B mounted .on a plate B supported on the bed; C, a

sheathing-strip or ribbon-guiding means disposed in front of the group of dies B; D, a die located in the rear of the flange-form- 'ing dies B and serving to initially curve or curl the edge-portions of the sheathingstrip after the locking-tongues have been formed at the lateral edges thereof; E, a flaring tubular member or die serving to completethe operation of folding the sheath about the steel tubing as the steel tubing and sheathing strip are simultaneously drawn through the machine; F, a die serving to cause the locking-tongues of the sheathingstrip to become interlockingly engaged and part ally mashed; and G, a finishing die to complete the operation of masha substantially true circular external contour to the product.

The bed A may be of any suitable con .struction, and supported. in any suitable Win B andadditional cross members 2 and 3 are supported. The members 1 are supported in any desired manner to form a bench. i

The dies B are adapted to operate on the lateral edgeportions of a sheathingstrip or brass ribbon a to form a simple locking-tongue or flange 5 at one edge and p group of dies B comprises adjustable plates l 7 and8 mounted on the plate B and adjust-.

able transversely with relation to the bed A;

has its front end tapered or beveled, as ina lower die 9 mounted on the inner end of the plate 7 and disposes at one side of the path of the sheathing-strip; a lower die 9, constructed in sections, mounted on the inner endoftheplate 8 and located adjacent -.the other side of the path'of the sheathingstrip; an'upper die 10,-constructed in sections, co-acting with the die 9';'and an upper die 10 constructed in sections, co-actrn'g with the die 9*.

The plates 7 and 8 are adjustable toward and away from each other, having bo-lt-andslot'connection' 11 with the plate 13 That is'to say, said plates are received by re-' cesses or guides in the plate 13 and have slots which receive cap-screws, which pass through the slots and into threaded perforations in the plate B The cap-screws may be loosened to enable the plates 7 and 8 to be adjusted, and may be tig'htenedgtoclamp them in place. The die 9 comprises a block which is mortised into the upper surface of the inner end portion of the plate or block 7, as will be understood from "Fig. 4, being connected with said plate by cap-screws-12 which pass upwardly through the plate B Said die 9 has a fiat upper surface 13 at its inner portion and has a'raised outer portion or flange 141, said surfaces being joined by a shoulder 15 which is beveled as indicated at 16 (Figs. 3 and 6), and which be comes substantially vertical and slightly undercut, asindic'ated at 16 in Fig. 6 and continues rearwardly as a tapering over-' hanging edge 17, as shown in Figs. 7 and 8,

being thus adapted to curl the correspond-' ing edge of the sheathing-strip upwardly and bend'it inwardly to form the simple hooked flange or lockmg-tongue'5 sho-wn'in Fig. 8;The'upper die 10'is composed of sections 18, 19'and 20 which are secured to the plate 7 by cap-screws-2L' The shank portions of the die-sections 18, '19 and 20 are provided on their lower surfaces with tenons-22 which fit in a mortise with which the plate-7 is provided. Each of the diesections 18, 19 and 20 has the lower surface of its inner end provided with a flange '23 having a flat lower surface spaced slightly above the flat surface 13 of the die 9. The inneredge, or shoulder, of the flange 23 is undercut, as indicated at 24, thus af fordinga sharp edge 25, which edge continues across the whole of the sectio-n'ally constructed die 10 somewhat obliquely or tapering to correspond with the taper or obliquity of the edge 17 ofthe lower die 9.

The sectionally constructed lower die 9"* comprises, as appears from Figs. 3, 4, 5 and dicated at 31; and upon the upper surface of the die-section 27 is a rib 32 which is in substantial alinement with the rib30 and Upon the upper surface of virtually forms a continuation thereof. The

front end of the rib 32 in tapered slightly, and-the lateral shoulders of said rib are undercut, so that the rib 32 is' of dovetail cross section, but tapers slightly from front to rear.

The die-section 28 is mortised' into the outer edge-portion of the die-section 27,

and has a beveled tapering edge 33 which underlies the adjacent overhanging shoulder of the dovetail rib a flange 34 on its lower surface which fits in a'corresponding recess with which the die-section 27 is provided, and from the flange 34: depends a stud 35 which fits in'a holewith which the die-section 27 is pro vided, as shown in Fig. 5. As will be un- The member 28 has derstoo-d, the die-section 28 is smallest'at its front end, and the tapering'beveled edge 33 is adapted to perform the final bending movement of the locking-tongue 36 of the dovetail locking member 6 in the course ofthe formation of said locking member.

The sectionally constructed upper die 10 comprises die- sections 18, 19 and 20 The lower die- sections 26 and 27 are secured to the plate 8 by cap-screws 37 which extend upwardly, and the die-sections 1'8", '19

and 20 are provided on their lower surfaces 1 with tenons 38 which fit into corresponding recesses with which the plate 8 is provided,

and said last-named die-sections are secured to the plate 8 by cap-screws 39. The, diesection'18 has its inner end provided at its lower portion with a slightly; tapering flange 40 having a flat bottom face disposed slightly above the surface 29 of the diesection 26, and back of the-flange 40, the lower surface of the block is recessed to afford a space 41 which accommodates the rib 30. The die- sections 19 and 20 have corresponding flanges 410, that is, flanges'cor responding with the flange 40 of the die-' The die- sections 19 and 20"" section 18. also are provided with a rib or flange 4:2 separated from the flanges 40 by a space 43, as appears from Fig. '9 The shoulder of the flange 42.'Wlii0h is adjacent the'fiange 40, on the die-section 19 is provided with a, tapering bevel 414:, as will be understood from Figs. 7 and 9.'- The tapering bevel 14 isadapted to engage'the edge-portion of the sheathing-strip 4 and curl it down wardly over the rib '30, as shown in Fig. 7. Thereafter, the downwardly curled edgeportion passes into engagement with the tapering beveled surface 33 of the die-section 28 and the formation of the dovetail member 6 of the sheathing-strip is thus completed. The flange 42 of the die-section 20 is reduced or cut away to accommodate the die-section 28, as shown in Fig. 8.

It may be stated here that the die-section 28 virtually forms a part of or is complemental to the die-section 20*, said section 20 being formed independently for convenience in manufacturing and assembling.

The flange of the die-section 20 has its inner shoulder undercut, as indicated at L5, and thus acts in conjunction with the adjacent undercut surface of the rib 82 in forming the dovetail member 6.

The means O for guiding the sheathingstrip into the flanging dies B and holding the strip rigid with relation to said dies at the point of entry comprises a pair of journal-blocks 46 secured to the front edge of the plate B a roller 4L7 journaled between said blocks and having end flanges a8 whose inner surfaces are in substantial alinement with the passage through the fianging dies; said roller 47 being located immediately in advance of the entrance to the flanging-dies; a second roller 49 disposed a short distance in front of the roller 47 and in substantially the same horizontal plane; a guide member 50 disposed above and slightly in advance of the roller 47 and having a substantially flat lower surface 51 suitably spaced with relation to the roller 47 to admit the sheathing-strip;and bolts or cap-screws 52 connecting the angular shanks 53 of the member 50 with the blocks 46. The shanks 53, which extend forwardly from the member 50, are provided with longitudinal slots 54 which receive the bolts or cap-screws 52 and permit the member to be adjusted with relation to the roller 47. The member 50 is provided with a. perforation 55 adapted to serve as a guidefor the steel tubing 56 to which the sheath is to be applied. In entering the strip of sheathing material, the strip is first passed beneath the roller 4-9 and then up over the roller 47 and beneath the lower surface 51. of the member-$0 and into the flanging dies.

The die 1) comprises a lower die-member 57 whose upper surface is provided with an elongated recess 58*having 'a flat bottom 59 and upwardly rounded lateral walls 60 which converge somewhat from front to rear, as indicated in Fig. 17; and a pair of die-members 61 secured to the die-member 57 by capscrews 62 and studs 63, each of said diemembers 61 having an inwardly projecting end provided with a depending flange 642 having a rounded lower surface correspond ing approximately with the rounded surfaces 60 of the lower die-member. The diemembers 61 are cut away as indicated at 65,

The member E is of flaring tubular form,.

preferably open at its front upper portion and conforming in cross-section at its front end substantially to the outlet of the die D. The rear end of the member E conforms 'approximately to the entering end of the die I to which it extends.

The die F comprises an approximately tubular member 67 which is somewhat open at its'upper side, and rings 68 and 69 on the end portions of said tubular member. The member 67is in the form of a split cylinder, and at the front end of said member one edge-portion 70 is open somewhat and received in a recess with which the ring 68 is provided internally at its upper portion.

The member (37 is slighty elliptical, its vertical axis being longer than its transverse 3 axis.

The recess 71 affords a shoulder 72' against which that edge of the sheathing' strip which is equipped with the simple locking-tongue 5 may bear in the passage of the sheathing-strip through the die. The

' other edge 73 of the split cylinder (37 is depressed somewhat at the entering end of the die and for a short distance in the rear of the ring 68, so as to be adapted to hold the dovetail locking member 6 depressed until the tongue 5 is brought into engagement with the tongue 36, which is accomplished by the internal conformation of the member 67, as will be understood from Figs. 1a and 15. The rear portion of the die F is closed (eircumferentially), although slightly elliptical. The upper portion of the cylindrical member 67 is cut away somewhat centrally as indicated at "74, which enables the opera tion of the interlocking of the tongues 5 and 36 to be constantly viewed, if desired.

The finishing die G may taper somewhat from front to rear, and is of true cylindrical I I of the ribbon and the dovetail locking member 6'is formed at the other edge of said ribbon, the tongue 5 being turned upwardly and inwardly while the tongue turned downwardly and inwardly. As the ribbon passes through the die D, its edge portions are curved or made concavo convex, as shown in Fig. 18, and, in the passage through the tube-shaping die E the material is rounded into approximately cylindrical form, entering the die F with the locking tongues approximately in the relation shown in Fig. 14 During the passage through the die F, the locking tongue 5 is gradually advanced across the tongue 36 and lowered into locking relation with the tongue 36, as shown in Fig. 15, and during the final ortion of the movement through the die F the locking tongues are mashed together, as shown in Fig. 16. The product then passes through the finishing dies and emerges wlth a substantially true outer cyllndrical surface, the completion of the mashing operation, which results in flattening the internal tubing slightly at its upper portion, resulting in the passage through the dies. The seam produced in theoperation is one which is known in the art as a double lock seam, which is scarcely visible in the finished product. It is to be noted that while the sheathing-strip is passing through the mechanism C, it is properly guided and stiffened, so that its lateral edge-portions will properly-enter the flanging dies. ment whereby the thin brass ribbon is caused to pursue a somewhat tortuous path, that is, to pass beneath the roller 49 and over the roller L7, and the juxtaposition of the flanging dies insures the ribbon against buckling and aids materially in the accurate feeding of the ribbon through the flanging dies. The retarding pressure exerted upon the ribbon as it passes through the space between the roller 47 and surface 51 of the member 50 may be regulated at will by adjustment of the member 50.

From the foregoing, it will be understood that the flanging, or lock-tongue forming operation is performed while the sheathingstrip is in the open or non-tubular condition and that a very gradual tube-forming operation then follows, in the final portion of which the tongues are brought into interlocking relation and mashed together; and it will be appreciated that by reason of this principle. of operation the strain upon the dies is very greatly lessened, the life of the apparatus increased, and the detection and remedying of defects greatly facilitated. My invention enables small gage sheathing material to be employed, and, as the output per machine is increased for the reasons pointed out, it will be understood that my invention enables the cost of product-ion of sheathed tubing to be very materially reduced. It is obvious that the form of the tube or object to be sheathed may vary.

The foregoing detailed description has been given for clearness of understanding only. and no undue limitation is to be understood therefrom, but the appended claims The arrangeare to be construed as broadly as permissible in View of the prior art.

What I regard as new, and desire to secure by Letters Patent, is

1. In apparatus of the character set forth, the combination of a pair of rolls disposed one in advance of the other, a guide-member coacting with the rearmost roll, fianging dies located in the rear of said rearmost roll and adapted to form locking tongues at the lateral edges of a sheathing-strip fed. therethrough, and means for curving said strip into tubular form and bringing said locking tongues into interlocking relation.

2. In apparatus of the character set forth, 80 flange-forming dies adapted to form locking tongues on the lateral edges of a sheathingstrip, comprising lower dies having flangeforming walls separated by a space and a pair of sectionally constructed upper dies separated by a space and having flangeforming walls coacting with said firstnamed walls, in combination with means for "guiding a tube to be sheathed, means for forming the sheathing-strip about said tube, and means for interlocking and mashing the locking-tongues of said sheathing-strip.

3. In apparatus of the character set forth, flange-forming dies adapted to form locking tongues at the lateral edges of a sheathing- 95 strip comprising a pair of lower dies, one of c which is equipped with a flange having a shoulder with a beveled surface at its front end and an undercut surface at its rear end and the other of which is equipped with a rib tapering at its front end and undercut to dovetail form at its rear end, an upper die having a depending flange with an undercut edge adapted to coact with said shoulder, and another upper die having shoulders adapted to bend the metal of said strip about said rib and thereby form a dovetail-form locking member.

4. In apparatus of the character set forth, the combination of a lower die having an 11 upwardly presented flange with a shoulder having a beveled surface at its front end and undercut at its rear end, a second die having an upwardly presented rib with a tapering front end and an undercut rear end -of dovetail form, a die-section having a beveled tapering edge present-ed beneath the outer undercut shoulder of said rib, an upper die having a shoulder coact-ing with said first-named shoulder adapted to act in con- 130 junction therewith to form a simple locking-tongue, and another upper die having shoulders adapted to bend the metal of the sheathing-stripabout said rib, one of said shoulders having an undercut surface 00- acting with the inner undercut surface of said rib. v

5. In apparatus of the character set forth, the combination of a lower die having a flange with a shoulder beveled at its front end and undercut at its rear end, a sectionally constructed upper die having at the inner end thereof a tapering undercut flange coacting with said shoulder and adapted to act in conjunction therewith to form a simple locking-tongue, a second lower die spaced apart from said first-named lower die equipped on its upper surface with a rib having a tapering front end and undercut surfaces at its rear end, and a sectionally constructed upper die coacting with said last-named die and having shoulders serving to act in conjunction with said rib to form a dovetail locking member.

6. In apparatus of the character set forth, the combination of a pair of lower dies, one of which is equipped with a shoulder having a beveled front portion and an undercut rear portion presenting a tapering edge, a

second lower die spacedapart from said.

first-named die and having a rib with a tapering front end and an undercut rear end, a die-section having a beveled tapering surface coacting with the outer undercut surface of said rib, an upper die coacting with said firsbnamed lower die and having a flange-forming shoulder coacting with said first-named shoulder to form a simple locking tongue. an upper die coacting with said second-named lower die and having shoulders adapted to bend the sheathing-strip about said. rib, and strip-guiding and stiffening means located immediately in front 'of said dies.

7. In apparatus of the character set forth, the combination of a pair of plates adjustable toward and' away from each other, flange-forming dies mounted on said plates adapted to form locking tongues at the lat- C'opies of this patent may be obtained for eral edges of a sheathing-strip fed therethrough, means for guiding the sheathingstrip into said dies, means for guiding a tube adjacent said dies, and means for forming the sheathing-strip about said tube and interlocking and mashing the locking-tongues of said sheathing-strip.

8. In appa 'atus of the charwrter set forth. the combination of a pair of plates adjust able toward and away from each other, flange-forming dies mounted on said plates adapted to form locking tongues at the lat-- eral edges of a sheathing-strip fed therethrough. a pair of rolls located one in advance of the other and adapted to permit a sheathing-strip to pass between them and over the rear roll. and an adjustable guidemember located above the rear roll.

9. In apparatus ofthe character set forth. the combination of a lower die-sect ion having a rib on its upper surface provided with a tapering front end, a second die-section in the rear of said first-named die-section and having a rib in al'inement with said first-named rib and provided with undercut lateral shoulders, a third die-section having a tapering beveled edge projecting beneath the outer undercut surface of said secondnamed rib, another lower die having a shoulder with a beveled front end-portion and an undercut rear end-portion, and upper dies having shoulders coacting with the shoulders of the lower dies to form lockingto-ngues at the lateral edges of a sheathingstrip.

FRANCIS N. PALMER. In presence of L. HEISLAR, R. SCHAEFER.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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