US2301095A - Hinge and method of making parts therefor - Google Patents

Description

Nov. 3, 1942. w. J. TIERNEY 3 5 9 HINGE AND METHOIj OF MAKINGI PARTS THEREFOR Filed Jan. 9, 1941 Z'Sheetsheet 1 Nov. 3, 1942. w. J. TIERNEY 2,301,095 HINGE AND METHOD OF MAKING PARTS THEREFOR Filed Jan. 9, 1941 2 Sheets-Sheet 2 j J9 J3 JJ 12 J ,5'0 )2? 1 Ill:IIIILZIZIIZI:11:11?

a %m4z Patented Nov. 3, 1942 UNITED STATES PATENT OFFICE HINGE AND METHOD OF MAKING PARTS THEREFOR William J. Tierney, Rockford, Ill., assignor to The Atwood Vacuum Machine Company, Rockford,

a copartnership composed of Seth B.

7 Claims.

This invention relates to hinges and is particularly concerned with an improved method of making hinge members, the present method being an improvement upon that disclosed in my copending application Serial No. 317,283, filed February 5, 1940, which is now Patent No. 2,235,- 241, dated March 18, 1941, and has been reissued as Re. 21,876, dated August 12, 1941.

The principal object of my invention is to provide a hinge member which is not only of varying width and thickness, that is, wider and thinner in the attaching portion and narrower and thicker in the pintle end portion and of varying width and thickness at intermediate points but has the pintle receiving extremity of slightly greater width than the rest of the pintle end portion to form protruding bearing portions on opposed edges of the inner hinge member to space the same from th top and bottom walls of the cooperating U-sha-ped sheet metal outer hinge member.

These inner hinge members, in accordance with my invention, are produced from bar stock of uniform width and thickness by passing the same between rolls, one with a plain periphery and the other with a cam-shaped periphery conformed to give the hinge bianks the desired thicknesses at the various points along the length thereof, the strip of bar stock being out after rolling to provide a number of blanks which are then stamped between dies to bend the same longitudinally to the desired shape after which the blanks are coin pressed between other dies in the plane of the blanks to true them up, the pintlereceiving extremity being formed in this final coin-press operation to provide the desired em bossed bearing surfaces of limited area on the opposed edges of the hinge members.

The invention is illustrated in the accompanying drawings in which Figures 1 and 2 are sections in planes at right angles to one another illustrating a hinge of the type using the hook-shaped member with which the present method of manufacture is particularly concerned;

Fig. 3 is a perspective view of a portion of the bar stock used in the production of these hinge members;

Fig. 4 shows the same portion of the bar stock after the initial rolling and forming operation illustrated in Fig. 5, the latter showing the two rolls with a portion of the bar therebetween, and

Figs. 6 and '7 are views illustrating the coinpress operation, Fig. 7 being a plan view showing the blank in the lower die recess, and Fig. 6 being a section on the line 6-6 of Fig. 7 showing the upper and lower dies.

Th same reference numerals are applied to corresponding parts throughout the views.

Referring briefly to Figs. 1 and 2, 8 designates a portion of the body and 9 a portion of the door of an automobile. The hinge shown comprises an outer U-shaped member 10 and an inner hook-shaped member H mounted on the body and door, respectively. The U-shaped outer member is formed from sheet metal providing upper and lower substantially horizontal walls 12 and I3 having end portions [4 and I5 offset inwardly toward one another in substantially hori- Zontal parallel relation for bearing engagement with the opposite ends of the pintle receiving end portion 16 of the hook-shaped inner member ll. 11 is a pintle entered in registering holes I8 and 19 in the walls 14 and I5 and having a working fit in the pintle hole 29 provided in the end portion [6 of the hook member H. The hinge member it! has flanges 21 and 22 providing attaching portions for securing the same to the body pillar, a portion of which is shown at 23. 24 is a sheet metal face plate suitably welded to the attaching portions 2| and 22 and cut away as at 25 to provide operating clearance'for the hook member II. The latter has an offset portion 26 next to its attaching end portion 2'! where it extends through the cut-out portion 25 of the face plat 24 whereby to provide operating clearances for the hook end 28 of the hinge member H when the door closes. The hook end 28 is next to the offset portion 26 and its radius 29 is long enough so that the portion 38 clears the body pillar in the opening of the door. The pintle end portion 31 on the other half of the hook end 28 is approximately at right angles to the attaching portion 21 and the door 9 is accordingly free to swing through approximately 90 from closed to open position. Now, it can easily be seen by inspection of the hinge member H in Fig. 1 that it is desirable to have the attaching portion 27 wide and of relatively thick section so as to provide proportionately broader surface engagement with the door to which it is secured. On th other hand, it is desirable to have the pintle end portion 31 of narrower and thicker section, the thickened section permitting provision of a pintle bearing hole 29 of large enough diameter without reducing the wall thickness around th bearing hole too much. A section between the attaching portion 21 and the pintle end portion 3| is preferably of gradually increasing thickness outwardly and gradually increasing width inwardly as indicated in Figs. 1 and 2. However, it can also be seen by inspection of Fig. 2 that it is desirable to have the extremity it of the hinge member H a little wider than the rest of the pintle end portion 31 so as to provide embossed bearing surfaces 32 and 33 of limited area on the top and bottom of this pintle-receiving extremity and accordingly provide ample operating clearances for the upper and lower edges of the hinge member I I with respect to the walls l4 and i5 of the hinge member Hi.

Referring now to Figs. 3-5, 34 designates the steel bar stock from which blanks B are produced by rolling and forming between rollers 35 and 36 in the manner shown in Fig. 5. The roller 36 has a smooth cylindrical periphery 3'! but the periphery 38 of the roller 35 is profiled or camshaped to conform to the shape of the blanks to be produced, the periphery 33 having cam surfaces for the formation of five blanks in each turn. The bar 3 1 has a cross-section approximately the same as the pintle end portion 3| of the blank. The attaching end portion 21 of the blank, however, is much thinner and wider and is given that form by pressure between the rollers, these being operated at the same speed in the direction of the arrows and being supported in fixed spaced relation. The intermediate portions of the blanks between the ends 21 and 3! are of varying width and thickness, the blank decreasing in width but increasing in thickness gradually from the attaching end portion 21 toward the pintle end portion 3| as previously indicated and as also appears from an inspection of Fig. 4-.

This rolling and forming operation is done hot.

The blanks are cut from the bar by shearing the same transversely at the points 39. In some instances the attaching end portions 21 will require milling oif along the longitudinal edges to square these up and also trimmed down to the desired width to fit the hinge seats on the door. Then, too, the extremities of the end portions 2! will ordinarily be milled off square and so as to trim the blank down to the desired length. These trimming operations are simple and inexpensive. The blank prior to the final coin-press operation shown in Figs. 6 and 7 for truing up and reshaping the blank in accordance with my invention is bent transversely between dies to the hook shape shown in Figs. 1 and 7, the dies bending the pintle end portion 3| substantially at right angles to the attaching end portion 2! and also from the offset bend 26 therein.

The dies 4:! and 4| shown in Figs. 6 and 7 are coining dies and the recesses 42 and 43 are accurately formed so that when the dies are brought together under heavy pressure with the blank B inserted therebetween the blank is trued up and either straightened if bent slightly out of line, where a hinge member having the opposite ends on a line is desired as is true of the one shown in Figs. 1 and 2, or, where it is desired to have the pintle end portion 3| and, in fact, the complete hook end portion 28 bent into vertically offset relation with respect to the attaching end portion 21, this bending can be taken care of efficiently in this same operation. The coin-pressing results in a greatly hardened surface on the upper and lower longitudinal edges of the blank which means added life for the hinge member inasmuch as it is there that the bearing surfaces are provided at 32 and 33. The surfaces 32 and 33 in this coin-press operation are embossed in relation to the rest of the upper and lower longitudinal edges as clearly appears in Fig. 6.

It is believed the foregoing description conveys a good understanding of the objects and advantages of my invention. The appended claims have been drawn with a view to covering all legitimate modifications and adaptations.

I claim:

1. The method of making inner hinge members for hinges of the class described which consists in subjecting a bar of rectangular cross-section to a combination rolling and forming operation between rollers, whereby to form from a single bar a plurality of connected blank portions, each of increased width and decreased thickness at one end and intermediate thicknesses and widths intermediate the ends and substantially the original width and thickness of the bar at the other end, then cutting the blanks from the bar, then subjecting at least said last named end portion to pressure between dies to true up the edges of this portion of the blank and size the same to width so as to form at the extreme end thereof projecting bearing portions of limited area on opposed edges thereof, and finally drilling a pintle hole joining the approximate centers of said bearing portions.

2. The method of making inner hinge members for hinges of the class described which consists in subjecting a bar of rectangular cross-section to a combination rolling and forming operation between rollers, whereby to form from a single bar a plurality of connected blank portions, each of increased width and decreased thickness at one end and intermediate thicknesses and widths intermediate the ends and substantially the original width and thickness of the bar at the other end, then cutting the blanks from the bar, then subjecting all but the first named end portion to pressure between dies to true up the edges and the general shape of this portion of the blank and at the same time reduce the width thereof except for a short length at the extreme end thereof so as to produce projecting bearing portions on opposed edges at said extremity, and finally drilling a pintle hole in said extremity joining the approximate centers of said bearing portions.

3. As an article of manufacture, an inner hookshaped hinge member for a concealed hinge for a vehicle door formed from a single elongated piece of bar stock of rectangular section, the said hinge member comprising an attaching shank portion at one end thereof and a pintle receiving portion at the other end thereof, said pintle receiving portion being of relatively thick and narrow section corresponding substantially to the section of the original bar stock and the attaching end portion being formed to relatively thin and wide section and the intermediate portion of said member being formed to decreasing width and increasing thickness from the attaching portion toward the pintle receiving portion, the pintle receiving portion being formed to reduced width an appreciable portion of the length thereof from a point near the extremity thereof so as to leave projecting bearing portions of limited area on opposed edges of said extremity, and there being a pintle hole provided in said extremity joining the approximate centers of said bearing portions.

4. For a concealed hinge of the character described comprising a U-ohaped sheet metal outer part adapted to receive a hook-shaped inner member and a pintle fixedly secured in the outer part and pivotally mounting the inner member thereon, said outer part having spaced top and bottom walls joined by a substantially vertical wall, and outwardly extending attaching flanges at the free ends of said top and bottom walls, a hook-shaped inner hinge member, the pivotal extremity only of which is formed to provide substantially coaxially projecting bearing portions on opposededges of limited area on their exposed outer ends for bearing engagement with the inner sides of said top and bottom walls, said hook-shaped inner hinge member having a pintle opening provided therein joining the approximate centers of said bearing portions, the aforesaid pintle extending through said hole.

5. As an article of manufacture, a rolled hinge member for a vehicle door hinge formed from a single elongated piece of bar stock having the grain running lengthwise, the said hinge member comprising an attaching shank portion at one end thereof and a pintle receiving portion at the other end thereof, the pintle receiving portion being of relatively thick and narrow rectangular section, and the attaching end portion being formed to relatively thin and wide rectangular section so as to compact the grain transversely of said portion, the intermediate portion of said member being formed to decreasing width and increasing thickness from the attaching portion toward the pintle receiving portion so as to compact the grain transversely of said intermediate portion, at least the pintle end portion having the grain compacted edgewise of said portion by pressure between dies from a point near the extremity thereof so as to leave projecting bearing portions of limited area on opposed edges of said extremity.

6. As an article of manufacture, a rolled hinge member for a vehicle door hinge formed from a single elongated piece of bar stock of rectangular section having the grain running lengthwise, the said hinge member comprising an attaching receiving portion at the other end thereof, the pintle receiving portion being of relatively thick and narrow rectangular section corresponding substantially to the section of the original bar stock, and the attaching end portion being formed to relatively thin and wide rectangular section so as to compact the grain transversely of said portion, the intermediate portion of said member being formed to decreasing width and increasing thickness from the attaching portion toward the pintle receiving portion so as to compact the grain transversely of said intermediate portion, at least the pintle end portion having the grain compacted edgewise of said portion by pressure beshank portion at one end thereof and a pintle tween dies from a point near the extremity thereof so as to leave projecting bearing portions of limited area on opposed edges of said extremity.

'7. The method of making hinge members which consists in subjecting a bar of rectangular crosssection to a combination rolling and forming operation between rollers, whereby to form from a single bar a plurality of connected blank portions having the grain running lengthwise of all of said blank portions, each blank portion as a result of the rolling operation having increased width and decreased thickness at one end and intermediate thicknesses and widths intermediate the ends and substantially the original width and thickness of the bar at the other end, then cutting the blanks from the bar, then subjecting at least the pintle end portion to pressure applied thereto in an edgewise position between dies to true up the edges of this portion of the blank but leave substantially coaxially projecting bearing portions of limited area on opposed edges, and drilling a pintle hole crosswise of the last named end portion joining the approximate centers of said bearing portions.

WILLIAM J. 'IIERNEY.

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