|Publication number||US374788 A|
|Publication date||Dec 13, 1887|
|Filing date||Jan 11, 1887|
|Publication number||US 374788 A, US 374788A, US-A-374788, US374788 A, US374788A|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (2), Classifications (2)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Patented Deo.'-13, 1887-.
N PETERS. Pnowuuw m vm. Wnshing'un. o. c.
may STATES PA ENT ,rricn.
PETER FORG,- OF SOMERVILLE, MASSACHUSETTS.
SPECIFICATION forming part of Letters Patent No. 374,788, dated December 13, 1887.
Application filed January 11, 1887. Serial No. 224,012.
To all whom it may concern.-
Be it known that I, PETER FORG, of Somerville, county of Middlesex, and State of Massachusetts,have invented an Improvement in Hinges, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts. I This invention has for its object to provide a friction-hinge for mirrors and other articles having one part stationary or fixed and another part adapted to be turned to occupy a position at an angle to the fixed part.
Prior to my invention cast-metal hinges, especially those used on mirrors in furniture, have been madewith feet having cup-shaped ears, the said ears being concaved or cupshaped on their inner faces to receivea spiral spring. So, also, hinges have been made with one ear flat and the other cup-shaped 011 its inner face and receiving a spiral spring within it and having a fiat washer on the bolt uniting the cars.
Hinges have heretofore been made of sheet metal struck n p at right angles and the halves connected by interposed rubber and metal washers and a transverse bolt provided with a nut and a coiled spring interposed between thenut and one-half of the hinge.
My invention'consists of a wrought-metal friction-hinge composed of two halves struck up from sheet metal, with feet and ears, the
said ears being flat and in contact throughout the area of their adjacent faces, concavo-convex spring washers or disks being arranged on the outer face of each ear and having other than round holes therein to receive a rivet which turns with the washers and ears and unites the halves of the hinge to secure uniform or constant springaction or wear, substantially ashereinafter particularly set forth and claimed.
Figure 1 is a top or plan view of a sheetmetal friction-hinge made in accordance with my invention; Fig. 2, avertical section of Fig. 1 on line 00 as; Fig. 3, a detail of a washer; and Fig. 4, a view of a sheet-metal strip or blank,
. showing the shape of the blank for the half of a hinge before it is struck up to form an ear, the part to form the ear being indicated by dotted lines.
and of the width desired for the hinge, is subjected to the action of a cutting die not herein shown, but of the shape it is required the leaf should have before being struck up and substantially such as shown at a in the full and dotted lines, Fig. 4, the said die at the cutting operation also stamping out the holes a a". The blank so made and markeda is then struck up by a die, in usual manner, into the shape shown in Figs. 1 and 2, to form feet co and a flat ear, to, substantially at a right angle to the feet a the said ear being subslantiall y fiat or smooth on its inner face.
To form my improved friction-hinge two halves such as described are taken and placed with the inner faces of the smooth fiat ears to in contact, as shown in Figs. 1 and 2, and a rivet, I), is passed through the holes a in said ears. Upon the rivet b, and bearing against the outer face of each ear (0, is a concavo-convexed disk or spring-washer, b, the concaved side of the said disk or washer being next to the said ear, the said disk being convexed at its circumference to form a smooth or rounded contact-surface with the ear, thus preventing a cutting action of the said disk upon the said car when the latter is turned. 7
The parts enumerated and comprising the hinge are secured closely together by means of the rivet b, which is headed in usual manner.
In the application of my invention one-half of the hinge will be screwed or otherwise secured to the fixed or stationary part of the articlesuch,for instance, as the mirror-framewhile the other leaf will be secured to a movable part, as a mirror, there being one at each side of the said mirror. WVhen the mirror is tipped or moved to any desired position, the leaf secured thereto will turn on the rivet b as on a pivot, and it will be maintained in the- The'sheet-metal strip A, of Bessemer steel ICO ties on the inner face of said ears. The open- 7 ing in the washer through which the rivet b is extended is square or rectangular or other than round shape, to prevent the said washer from rotating or turning on the rivet when the movable leaf of the hinge is turned, the position of the said washer with relation to the ear against which it presses being thus maintained always the same, so that the spring action of the said washer against the car will be substantially uniform or constant.
By employing two eoncavo convex springwashers, one for each ear, each washer bearing against the outside of the ear with which it is in contact, and having a square or rectangular or other than round hole, through which the rivet is extended, I am enabled to obtain a much greater friction between the two cars than if asingle washer were employed. Furthermore, by making the hole through which the rivet is extended square or other than round the spring-washer is prevented from rotating on the rivet, and a side friction is obtained between the ear and the outer side of the springwasher, as well as between the two ears.
I do not herein broadly claim a springwasher in combination with a single hinge, as that forms the subject-matter of another application filed concurrently herewith.
I claim- 7 The wrought-metal friction-hinge consisting of two halves struck up from sheet metal, with feet a and cars a, which latter are flat and in contact throughout the area of their adjacent faces, concavo-convex spring-washers or disks b, arranged one on each ear and having other than round holes therein, and a rivet, b, secured in said washers and turning with them and with the ears and passed through the ears and uniting the halves of the hinge, whereby the spring action and wear are uniform or constant, substantially as shown and described.
In testimony whereof Ihave signed my name to this specification in the presence of two subscribing witnesses.
PETER FORG. \Vitnesses:
G. W. GREGORY, 'J. H. CHURCHILL.
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