US369024A - noeceoss - Google Patents
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- US369024A US369024A US369024DA US369024A US 369024 A US369024 A US 369024A US 369024D A US369024D A US 369024DA US 369024 A US369024 A US 369024A
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- 239000002184 metal Substances 0.000 description 16
- 239000000203 mixture Substances 0.000 description 10
- 210000003414 Extremities Anatomy 0.000 description 4
- 210000000887 Face Anatomy 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000036633 rest Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 210000003165 Abomasum Anatomy 0.000 description 2
- 210000003141 Lower Extremity Anatomy 0.000 description 2
- 210000000214 Mouth Anatomy 0.000 description 2
- 241001274197 Scatophagus argus Species 0.000 description 2
- 210000003371 Toes Anatomy 0.000 description 2
- 201000002372 amelogenesis imperfecta type 1G Diseases 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007723 die pressing method Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 235000015108 pies Nutrition 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
- B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
Definitions
- the objects of my invention are, first,'to form such an interlocking marginal socket upon a prepared metal roofing-plate at a single operation second, to form two or more 'such conduits at the same time on a single plate, whether they be on adjoining or opposite sides; third, to make the operation automatic; fourth, to form and bend the involuted rim constituting one side of the slotted socket at the same time and operation, as that in and by which the sides and turns of the initial Z- shaped folds are also brought to their ultimate structural distribution; fifth, to give this marginal structure when formed on a metal roofing-plate such a set that the relation of its parts as a whole will remain constant to their established positions when released by the separation of the press from the formative facesof the dies and their accessories, and,sixth, to construct and adapt to press-dies such accessories as are calculated to form and define the inner contour of such a slotted socket.
- Figure 1 is a plan view of the lower dies acting face.
- Fig. 2 is a like view of the acting face of the upper die.
- Fig. 3 is a vertical section of both upper and lower dies,taken on lineXX of Figs. 1 and 2.
- Fig. 3% is an enlarged sectional view of the buffer-block and fillcted edge of the lower die, the forming-swage, and the pushing-toes of the upper die, showing their positionwhen the upper and lower dies are close together.
- Fig. 4 is a vertical section of the dies, taken on line y y of Figs. 1 and 2.
- Fig. 5 is a plan or top view of the dies and their accessories when assembled for use.
- Fig. 6 is a plan view of the lower side of one of the accessory formative swages, to which is aptrate the mechanism and adjuncts by which in pended, by dotted lines, an end elevation of the same.
- my device consists, when adapted to form these interlocking margins-upon adjoining sides of a prepared blank, of the following parts: A rectangular steel lower die, A, Fig. 1, provided upon two adjoining extremities of its otherwise square plane formative surfaees,with two ridges or fillets, L L, which lie at right angles to each other and on their inner sides, I 5, rise vertically from said plane surface of lower die, A, their height therefrom being equal to the total thickness of the socket Lon when folded, less the thickness of the plate of which it is made.
- Said fillets L L moreover, have convex slanting backs O 0, connecting their rounded summits 0 0 with the outside edges of the die proper, which, if it extend farther than the line formed by the intersection of these surfaces, serves only to form an additional seat, M, Figs. 1, 3, and 4, for an accessory forming-swage, D, Fig. 6, of which more will be said hereinafter.
- the remaining two sides of lower die, A have stop-rims S S, formed by bolting to'them (boltss s, &c.,) thin strips of metal, so as to project slightly, as at s 8, Figs. 3 and 4, beyond its formative face.
- An upper or ram flatter die, B, Fig. 2 is provided on its formative face with narrow rectangular slots 1) b, that lie, when the two dies are brought together, in the guides of a power-press both within and parallel to the fillets L L, Figs. 1, 3, and 4.
- the distance that then separates their outer edges, 1) b and the inner edges, Z Z, of the fillets L L being equal to the major transverse axis of the socket that they are adapted to assist in forming, while their length depends upon and corresponds with that of the inner or back fold thereof.
- these slots 1) b sliding shutters l) I) having attached to their upper sides at suitable intervals cylindrical disks 1) &c., are fitted.
- Accessory forming-swagesD D, Figs. 3, 3%,5, and 6, are composed of fiat steel plates, that are in plan view elongated rectangular parallelograms,but in transverse section wedge-shaped, with their thin sides rounded off into semieylindrical truncations of a diameter equal to the minor transverse axis of the socket that they are adapted to assist in forming, (shown in section in the convex semicircles d" d of Figs. 3, 4, and 6,) the length of their wedge sides being equal to the length of the flange they are adapted to form.
- These swages D D are also provided on one side (which, when in use, is the under one) witha groove, 1, of Figs.
- I form it, as is best seen in Fig. 6, with extended lugs or ears 0 0 upon either end thereof, and to bring it into position I employ buffer-blocks G G, Figs. 3, 31 and 5, securely fastened by bolts Q Q and dovetailed tenons q q, engaging with corresponding female parts at either end of the eX tended side M of lower die, A.
- These blocks are provided on their upper surfaces with parallel planes 9 g, inclining toward the face of the lower die and extending at their outer ends from it to a height above its general plane equal, or preferably more than equal, to the joint height of the fillet L and that of the above-described initial folds of a blank when placed thereon, as indicated at Z in the heavy black line P of'Fig. 3.
- rock-shafts I connect on a line with the general plane face of the lower die, A, with a pivotshaft, K upon which rock-shafts k are engaged and carried by means of elongated slots 70 70
- These rock-shafts are of equal lengths and extend part way toward the adjacent side of the lower die, A. They carry, rigidly secured-to wit, w'elded-to their inner or unslotted extremities, the accessory swage D, so that when assembled it lies inserted between the acting faces of both dies A and B, with its wedge side d pointing between them and the side carrying the groove d turned toward the lower one, A.
- a blank metallic roofing-plate that is provided on two adjoining sides with suitable Z-shaped folds, and otherwise being of prescribed gage and dimensions,placing it so that the stop-rim S of the lower die, A, guides one ofits unbent edges until the other is arrested by the stoprim of the opposite side, the exterior fold of one of the initial Z-shaped folds at the same time sliding along, and as it turns embracing the wedge side of the accessory swage D.
- the swage D is next to be inserted I over the seat M between the outer fold of the remaining side,so that its back d rests upon the incline planes 9 g.
- the press is then put into operation, and upon the separation of the dies the roofing-plateis withdrawn by means of the handle H.
- the swage D is, lastly, slid out from the convolutions of the margin it has assisted in forming, which, like the adjoining one, will be found to be in section,fairly illustrated in Fig. 7, of which Pie theplate, rthe fold compacted upon itself, 3 the involuted rim, a: the rounded back, 1; the free side of the margin,and N the extension,which constitutes the nailing-flange.
- the hereinbefore described wedge-sh aped former D provided with alongitudinal groove, d, in combination with a pair of power-press dies, A and B, one of which is provided with a fillet, L, the whole adapted to register and interact, substantially as hereinbefore described.
- the hereinbeforedescribed Wedge-shaped former D provided with a longitudinal groove, (1, in combination with a pair of power-press dies, A and B, one of which is provided with a fillet, L, and the other with a sliding shutter, If, the whole adapted to register and interact, substantially as and for the purposes hereinbefore described.
- a pair of power-press dies, A and B one of which is provided on its acting face with fillets L L and guide-stops S S, the other being provided on its acting face with sliding shutters b normally protruding from the slots I) b, which lie, when the dies come together in use, parallel to but within said fillets, in combination with cuneiform swages D D, provided, respectively, with longitudinal channels cl (1 and truncated wedge ends (i d, substantially as and for the purposes hereinbefore described.
- a pair of power-press dies, A and B provided with fillets L L, buifer-blocks G G, shutters Z) b and ushin -toes E E and F F in combinationp b 7 with accessory forming-swages D D, provided with longitudinal channels at d, and beveled flanges terminating in rounded edges d one of which formers, D, is further provided with extended lugs G O, the bail h, and handle H,
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Description
(No Model.) 2 Sheets-Sheet 1.
l W. M. NOROROSS.
DIE FOR METALLIC ROOFING PLATES.
No. 369.024. Patented Aug. 30, 1887.
s A A 3* a WITNESSES; I IVEINTOR ZQM ",1/ -M N. PETERS. Phulc-Lflhagnpher, Walhlnghm. D. c
(No Model.) 2 sheets sheet 2. W. M. NORGROSS.
DIE FOR METALLIC ROOFING PLATES. No. 369,024. PatentedAug. 30, 1887.
- INVENTOR %aaj MAW V I f a; 4, Mm I l N FET ERS, PholoLnncgnphor, Washington 0.0
WIT NESSES:
UNITED STATES PATENT OFFICE.
WILLIAM M. NOROROSS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOB TO THE OORTRIGHT METAL ROOFING COMPANY, OF SAME PLACE.
one FOR METALLIC ROOFING-PLATES.
SPECIFICATION forming part of Letters Patent No. 369,024, dated August 30, 1887. Application filed May 3, 1887. Serial No. 236,929. (No model.)
To all whom it may concern.-
Be it known that 1, WILLIAM M. NoRoRoss, a citizen of the United States, residing at Phila- .delphia, county of Philadelphia, State of Pennand set, after they have been subjected to the initial stage of having the side or sides which are to hear them formed by any convenient method into Z-shaped folds of suitable widths. By means of my device I produce, at a single die-pressing operation, out of these initial 2 -shaped folds a margin adapted to receive and interlock with the marrying edge or edges of similar metal roofing- .plates and to form therewith a tight joint, this'margin consisting of what may be described as a slotted tubular socket composed of a portion of the plate bent under and compacted with itself, the doubled edge thereof turning in a rim toward the nailing-flange, while the free or short part of the above plication, after a sufficient interval, returns by a reverse half-turn in a single thickness outward under this rim, beyond which it extends into and forms the nailing-flange aforesaid. Subsidiary parallel folds may also, if desired, be used in conjunction with the'above-described socket, as by forming one upon the edge or other convenient part of the nailingflange, but, not being essential, will be passed here with the mere suggestion.
The objects of my inventionare, first,'to form such an interlocking marginal socket upon a prepared metal roofing-plate at a single operation second, to form two or more 'such conduits at the same time on a single plate, whether they be on adjoining or opposite sides; third, to make the operation automatic; fourth, to form and bend the involuted rim constituting one side of the slotted socket at the same time and operation, as that in and by which the sides and turns of the initial Z- shaped folds are also brought to their ultimate structural distribution; fifth, to give this marginal structure when formed on a metal roofing-plate such a set that the relation of its parts as a whole will remain constant to their established positions when released by the separation of the press from the formative facesof the dies and their accessories, and,sixth, to construct and adapt to press-dies such accessories as are calculated to form and define the inner contour of such a slotted socket.
Reference being now had to the accompanying drawings, which form a part of this specification, and in which similar letters of reference refer to corresponding parts throughout the several figures, they will be found to illuspractice I have obtained the above objects with most useful results. Of these, Figure 1 is a plan view of the lower dies acting face. Fig. 2 is a like view of the acting face of the upper die. Fig. 3 is a vertical section of both upper and lower dies,taken on lineXX of Figs. 1 and 2. Fig. 3% is an enlarged sectional view of the buffer-block and fillcted edge of the lower die, the forming-swage, and the pushing-toes of the upper die, showing their positionwhen the upper and lower dies are close together. Fig. 4 is a vertical section of the dies, taken on line y y of Figs. 1 and 2. Fig. 5 is a plan or top view of the dies and their accessories when assembled for use. Fig. 6 is a plan view of the lower side of one of the accessory formative swages, to which is aptrate the mechanism and adjuncts by which in pended, by dotted lines, an end elevation of the same. Fig. 7 is an inverted transverse section of a portion of a metal roofing-plate -provided with such an interlocking slotted socket and a nailing-flange In general,my device consists, when adapted to form these interlocking margins-upon adjoining sides of a prepared blank, of the following parts: A rectangular steel lower die, A, Fig. 1, provided upon two adjoining extremities of its otherwise square plane formative surfaees,with two ridges or fillets, L L, which lie at right angles to each other and on their inner sides, I 5, rise vertically from said plane surface of lower die, A, their height therefrom being equal to the total thickness of the socket Lon when folded, less the thickness of the plate of which it is made. Said fillets L L, moreover, have convex slanting backs O 0, connecting their rounded summits 0 0 with the outside edges of the die proper, which, if it extend farther than the line formed by the intersection of these surfaces, serves only to form an additional seat, M, Figs. 1, 3, and 4, for an accessory forming-swage, D, Fig. 6, of which more will be said hereinafter. The remaining two sides of lower die, A, have stop-rims S S, formed by bolting to'them (boltss s, &c.,) thin strips of metal, so as to project slightly, as at s 8, Figs. 3 and 4, beyond its formative face.
An upper or ram flatter die, B, Fig. 2, is provided on its formative face with narrow rectangular slots 1) b, that lie, when the two dies are brought together, in the guides of a power-press both within and parallel to the fillets L L, Figs. 1, 3, and 4. The distance that then separates their outer edges, 1) b and the inner edges, Z Z, of the fillets L L being equal to the major transverse axis of the socket that they are adapted to assist in forming, while their length depends upon and corresponds with that of the inner or back fold thereof. In these slots 1) b sliding shutters l) I), having attached to their upper sides at suitable intervals cylindrical disks 1) &c., are fitted. These shutters, when the dies are apart, are kept normally protruded from the faces of the upper die, B, by the action of spiral springs, as shown at t i of Figs. 3 and 4. These are maintained under compression by screw-caps I I, &c., Fig. 5, screwed into the tapped ends a n, &c., of cylindrical holes T T, &c., that are bored in line with the major longitudinal axis of the slots 1) b part way through the top of the upper die, B, and at right angles to its acting face. They are also of such size and interval as to correspond and register with the above-described disks 1) b, 850., for which the lower ends of these holes, as shown in 1'1, &e., of Figs. 4 and 5, form seats.
Accessory forming-swagesD D, Figs. 3, 3%,5, and 6, are composed of fiat steel plates, that are in plan view elongated rectangular parallelograms,but in transverse section wedge-shaped, with their thin sides rounded off into semieylindrical truncations of a diameter equal to the minor transverse axis of the socket that they are adapted to assist in forming, (shown in section in the convex semicircles d" d of Figs. 3, 4, and 6,) the length of their wedge sides being equal to the length of the flange they are adapted to form. These swages D D are also provided on one side (which, when in use, is the under one) witha groove, 1, of Figs. 3 and 6, and d ofFig. 4, running parallel to their said wedge sides, and of such a contour and depth as to constitute the female part of the fillets L L, with which they are adapted to register, save only that the mouths of these grooves are wider than the bases of their correspondin g fillets by a space approximately equal to two thicknesses of the roofing-plates that they are to assist in bending, and also saving that the edges formed by the intersection of the fiat sides of these grooves d d and the adjoining plane surfaces of swages D D in which they are formed are slightly chamferred or rounded off, the distance between said fiat sides (1- d and the rounded ends d d being equal to the major transverse axis of a finished socket.
Should it be desired to apply one of these swages by hand, I form it, as is best seen in Fig. 6, with extended lugs or ears 0 0 upon either end thereof, and to bring it into position I employ buffer-blocks G G, Figs. 3, 31 and 5, securely fastened by bolts Q Q and dovetailed tenons q q, engaging with corresponding female parts at either end of the eX tended side M of lower die, A. These blocks are provided on their upper surfaces with parallel planes 9 g, inclining toward the face of the lower die and extending at their outer ends from it to a height above its general plane equal, or preferably more than equal, to the joint height of the fillet L and that of the above-described initial folds of a blank when placed thereon, as indicated at Z in the heavy black line P of'Fig. 3. The other or inner ends of these incline planes 9 9 end in two seats distant in a right line from the inner or fiat side, Z, of the fillet L by a space that is equal to the shortest distance in a right line from the flat side d of the groove d to the back (1 of the swage D plus at least twice the thickness of the metal which is to be folded, said seat being formed by the intersection at right angles of notehing-planes 9 g of Fig. 3, of which the terminal pair 9 9" lie in the same general plane and form continuations of the auxiliary scat M, Fig. 5.
In conjunction with the above-described buffer-blocks, I secure by bolts 6 c, &e., to the upper or top side of the upper die, B, andjust within them and at right angles to the underlying shutter-slot b, right-angled downwardlypointing pushing-toes F F, provided on their lower extremities with planes f f, that lie in the same general plane and parallel to but projecting below or beyond the plane of the formative face of the upper die, B. They, moreover, terminate on their sides nearest to the die in right-angled notches so constructed and located as to form re-entrant angles of sufficient size to clear those portions of the swage D which underlie their ends when said swage is brought home to its seat, as hereinafter described. If, however, it is desired to make the mechanism entirely automatic, I securely fasten upon the anvil-bed of the power press (see Figs. 4 and 5) vertical pillars K K, and by screwing their reduced lower ends, K K, into holes tapped therein at equal and convenient distances from the side bearing the fillet L of the lower die, A, when in position on said anvil, the height of these pillars being about equal to that of the summit of this fillet L when thus assembled in the press. These pillars I connect on a line with the general plane face of the lower die, A, with a pivotshaft, K upon which rock-shafts k are engaged and carried by means of elongated slots 70 70 These rock-shafts are of equal lengths and extend part way toward the adjacent side of the lower die, A. They carry, rigidly secured-to wit, w'elded-to their inner or unslotted extremities, the accessory swage D, so that when assembled it lies inserted between the acting faces of both dies A and B, with its wedge side d pointing between them and the side carrying the groove d turned toward the lower one, A. To the center of the back d of the swage D, I also at tach, as by the ring r, one end of a spiral spring, R, the other or outer end of which is carried off at right angles to said side d and attached under moderate tension to some higherand convenient fixed part-as to guide of the power-press. In conjunction with this device I secure by bolts 6 e, &c., to the top or upper side of the upper die B, and just within and at right angles to the axis of the underlying shutter-slot b, right-angled downward-pointing pushing-toes E E, Figs. 4 and 5, provided on their lowerinside parts with parallel planes 0 c,inclining outward and downward from their beginning orintersection with the inner sides, 0 c",of said. toes,which should likewise be parallel to and equidistant from the nearest side,b ofthe slot 1) in the upper die, B, and extending below the general plane of said dies formative face to the above-mentioned line of intersection with the incline planes 0 of for a distance at least equal to and preferably greater than the thickness 'of the back or butt end d of the swage D.
In order to put the above-described mechanism into operation,it is only necessary to assemble the several parts, as shown in Figs.3, 4, and 5, and to attach the dies in the usual way to the ram-head and anvil-sockets of a power-press. Then to insert over the seat M, face down and between the separated dies, a blank metallic roofing-plate that is provided on two adjoining sides with suitable Z-shaped folds, and otherwise being of prescribed gage and dimensions,placing it so that the stop-rim S of the lower die, A, guides one ofits unbent edges until the other is arrested by the stoprim of the opposite side, the exterior fold of one of the initial Z-shaped folds at the same time sliding along, and as it turns embracing the wedge side of the accessory swage D. The
blank then rests its sides, carrying these folds lying upon and projecting slightly beyond the fillets L L. The swage D is next to be inserted I over the seat M between the outer fold of the remaining side,so that its back d rests upon the incline planes 9 g. The press is then put into operation, and upon the separation of the dies the roofing-plateis withdrawn by means of the handle H. The swage D is, lastly, slid out from the convolutions of the margin it has assisted in forming, which, like the adjoining one, will be found to be in section,fairly illustrated in Fig. 7, of which Pie theplate, rthe fold compacted upon itself, 3 the involuted rim, a: the rounded back, 1; the free side of the margin,and N the extension,which constitutes the nailing-flange.
Of course in an operation such as above described, in which two adjoining sides are thus pressed, it is necessary that the corner of the plate should be cut away so as not to interfere with the bending of the margins; but as this is also a matter of necessity, even in the preliminary stage of forming the initial Z-shaped folds, and is well understood by sheet-metal workers, it is here passed as unnecessary to further describe. Moreover, while the preceding mechanism and mode of operation have been gone into in great detail as being the best mechanism and way that I have devised of producing these results, still all the parts therein described are neither essential nor necessary to carry the main features of my invention into practical use.
Having now described my inventiomwhat I claim as new, and desire to secure by Letters Patent, is-
1. As a device for fashioning the rim on the doubled edge of the above-described metallic roofing plate socket, the hereinbefore described wedge-sh aped former D, provided with alongitudinal groove, d, in combination with a pair of power-press dies, A and B, one of which is provided with a fillet, L, the whole adapted to register and interact, substantially as hereinbefore described.
2. As a device for swaging the rim on the doubled edge of the above-described metallic roofing plate socket, the hereinbeforedescribed Wedge-shaped former D, provided with a longitudinal groove, (1, in combination with a pair of power-press dies, A and B, one of which is provided with a fillet, L, and the other with a sliding shutter, If, the whole adapted to register and interact, substantially as and for the purposes hereinbefore described.
3. In the manufacture of metallic roofingplates, a pair of power-press dies, A and B, one of which is provided on its acting face with fillets L L and guide-stops S S, the other being provided on its acting face with sliding shutters b normally protruding from the slots I) b, which lie, when the dies come together in use, parallel to but within said fillets, in combination with cuneiform swages D D, provided, respectively, with longitudinal channels cl (1 and truncated wedge ends (i d, substantially as and for the purposes hereinbefore described.
4; As a device for fastening the abovede scribed metallic roofing-plate socket, a pair of power-press dies, A and B, provided with fillets L L, buifer-blocks G G, shutters Z) b and ushin -toes E E and F F in combinationp b 7 with accessory forming-swages D D, provided with longitudinal channels at d, and beveled flanges terminating in rounded edges d one of which formers, D, is further provided with extended lugs G O, the bail h, and handle H,
for application by hand, while the other is attached to a retractor, (spring R,) and rockshafts K K, pivotally connected by the slots K K, and the pivot-shaft k to the fixed pillars K K, and adapted to work automatically by the interaction of the several parts, the whole being substantially as and for the purposes hereinbefore described.
5. As a device for iiishioning the abovedescribed metallic roofing-plate sockets, a pair of power-press dies of the desired polygonal acting face provided thereon with fillets L L, guides S S, banking abutments, (the shutters Zfbfi) pushing-toes E E F F, and bu fler-blocks G G, in combination with two or more acces sory forming-swages, D D, provided with longitudinal channels (Z d and beveled flanges terminating in rounded edges (1 d, and one or more of which swagcs, D, being further provided with a handle, H, and extended lugs C G, are adapted for application by hand, the remainder being attached to (spring) retractors R and rock-shafts K K, pivotally connected by slots 764 k and pivot-shafts k" to adjacent fixed pivots, (pillars K K,) and adapted to work automatically, the whole being substantially as and for the purposes hereinbefore described.
6. In the manufacture of metallic roofingplate sockets, a pair ofpower-press dies, A and B, ofwhich one, B, is provided on its face with a slot, 1), and holes T T, &e., in which a shutter, 1), provided with disks b, &c., is normally protruded by springs i i, &c., compressed nudcr screw-caps I I, &c., into seats t t, 850., while the other is provided with a fillet, L, having a vertical side, Z, and a convex back, 0, uniting in a rounded summit, 0, in combination with a cuneiform swage, D, provided with a groove, (1, and rounded truncation (1", adapted to register with said shutterb, and fillet L, substantially as and for the purposes hereinbefore set forth.
XVILLIAM M. NOROROSS.
\Vitnesses:
Cimmins F. ZIEGLER, Josuna M ATLACK, Jr.
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US369024A true US369024A (en) | 1887-08-30 |
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Cited By (1)
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US20100037494A1 (en) * | 2007-02-12 | 2010-02-18 | Martin Krebs | Ironing appliance comprising a boiling compartment in which the steam produced can freely escape to an ironing instrument |
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Cited By (1)
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US20100037494A1 (en) * | 2007-02-12 | 2010-02-18 | Martin Krebs | Ironing appliance comprising a boiling compartment in which the steam produced can freely escape to an ironing instrument |
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