US434877A

US434877A - Charles morrow

Info

Publication number: US434877A
Authority: US
Publication date: 1890-08-19
Anticipated expiration: 1907-08-19

Description

(Model.) O. MORROW. SPRING HINGE.

No. 434,877. b Patented Aug. 19, 1890.

UNITED STATES ATENT OFFICE.

CHARLES MORROl/V, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE CHICAGO SPRING BUTT COMPANY, OF SAME PLACE.

SPRING-HINGE.

SPECIFICATION forming part of Letters Patent No. 434,877, dated August 19, 1890.

Application filed January 3, 1890. Serial No. 335,836. (Model) To all whom it may concern.-

Be it known that I, CHARLES MORROW, a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Spring- Hinges, of which the following is hereby declared to be a full, clear and exact description, sufficient to enable others skilled in the art to which such invention appertains to [0 make and use the same.

The invention relates to spring-hinges, and more especially to such as are one Way or single acting, and is direct-ed particularly to the improvement of hinges wherein the spring acts positively to hold the door, &c., either open or closed, the spring serving to restore the door to one or the other position, according to the amplitude with which the door is swung.

The object in view is to simplify and cheapen the structure and to promote the efficiency in operation of spring-hinges, especially of those of the class named; and to this end the invention consists in the peculiarities in organization and construction, substantially as hereinafter described, and pointed out by claims at the conclusion of the description.

In the drawings, Figure 1 is a plan view of 0 the hinge. Figs. 2 and 3 are views in cross section on lines 00 a: and z z of Fig. 1. Fig. 4 is a central section on line yy of Fig. 1. Fig.

5 is a detail perspective view of the crankshaft detached. Fig. 6 is a detail (under) 3 5 view of the open-slot radius-arm and its wrist-pin. Fig. 7 is a sectional detail of the spring'chamber, showing the trunnion-seat.

Near the ends of the hinge-leaf A and proj ect-ing upwardly from the inner margins thereof extend the radius-anus Ct to, which carry the pintles 0, these latter being preferably cast in one piece with the arms and finished with an acorn or other like ornamental terminahif desired. From the companion leaf B extend in like fashion the radius-arms bb, these arms being furnished, respectively, with the eye d and the open slot 6 to receive the pintles c, projecting inwardly from the opposite radius-arms a a. The open slot 6 is cas- 5o ily made in casting the arm I), so that in ordinary practice only the eye cl requires to be drilled forfitting. The arms I) b are easily set upon the pintles c, and, being mounted in position, the stops f g on the adjacent arms a I) encounter each other ultimately to limit the outward swing of the hinge. In normal relation the abutting margins of the flat leaves 66 b may contact to arrest the swinging movement.

Between the pairs of radius-arms ct b a Z) and the inner edges of the hinge-leaves A B extend the trunnion-seats h. These seats are conveniently cast in one piece with the pintle leaf A and as a part of the hollow chamber 0, this latter being preferably of semi-cylindrical contour and terminating at its free end in near proximity to theinner margin of the eye-leaf B. Sufficient space is left between the adjacent edges of the chamber C and leaf B to allow either of them to swing away without encountering the other, the direction of swing being determined by the use of the hinge, whether for right or left hand turn. The trunnion-seats h afford journalbearings for the trunnion-shaft D, which eX- 7 5 tends axially between them, and is provided with the terminal crank It. The trunnionshaft D is usually made with a series of longitudinal grooves therein, one of which, as at 0, is carried through the trunnion proper p to the extreme end of the shaft D. A coilspring E surrounds the trunnion-shaftD and at one terminal projects outwardly to engage a hole orlike stop in the pintle-leaf A. The

opposite end of the spring E is inturned, and,

being admitted along the slot-groove o, permits the spring to slide freely upon the shaft until fully set thereon. The'inturned end of the spring locks against the edges of'its groove,

and so retains the spring in tightercoil'when go the shaft D is rotated 011 its bearings. A lug or lip Z, set upon the shaft D in near relation to the terminal crank k, serves with the latter to snugly embrace the wall of the trunnionseat h, and thus holds the trunnion-shaft 5 against theend-thrustin either-direction. The lug Z acts also as a convenient bearingfor the final coil of the spring E, and in fixing the position thereof so far tends to prevent the slip of the spring under the winding action of' the crank-shaft. Near its outer end the crank it has a stud an, over which fits the heel of the connecting-link F, the forward end or bill of such link hooking over the wrist-pin n, on the radius-arm b. The connecting-link F is thus pivoted loosely at both its ends and adjusts itself easily to the varying position of the parts during the swinging movement, acting also to hold the slotted seat of the hingeleaf snugly in position against its pintle.

When the swing begins, the crank-shaft D 70,

through the medium of the link F and radiusarm a, turns the spring E in closer coil, thereby increasing the tension thereon, so that it tends to return the door to its normal position on release of the power. If the door be swung so far as to carry the wrist-pin n beyond the extreme outer limit (or tangent) of its radial travel about the pintle 0, such wrist-pin in its new relation acts, through the medium of the link F,crank-shaft D 7c, in like fashion, as before, and in retreating from the tangent tends to draw the door to its open position and to hold it there, the'stops f g contacting to arrest the swing.

The construction and arrangement of the parts as here proposed produce a springhinge which is cheap and simple in its make, easily and quickly finished and fitted together, and strong and efficient in operation.

Except for finish and for the better protection of the coil-spring E, it is manifest that the hollow chamber 0 can be dispensed with entirely, retaining merely the end pieces or trunnion-seats h. So, also, other modifications may be practicedwvithin the skill of the mechanic to effect without departing from the spirit of the invention, which in consequence is not limited to the precise details set forth.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, ,is 1. The combination, with the hinge-leaves joined pi-votally together and having the trunnion-seats extended between them, of the trunnion-shaft bearing upon said seats and having a terminal crank, the coil-spring mounted about said shaft .and retained at one end thereby and secured at its opposite end to the adjacent hinge-leaf, and the link-connection between said crank and the radiusarm on the companion leaf, substantially as described.

2. The combination, with the hinge-leaves joined pivotally together, of the hollow housing extended between and from one of said leaves and furnished with trunnion-seats, the trunnion-shaft bearing upon said seats and having a terminal crank, the coil-spring mounted about said shaft and retained at one end thereby and secured at its opposite end to the adjacent hinge-leaf, and the link-con nection between said crank and the radiusarm on the companion leaf, substantially as described.

3. The combination, with the hinge-leaf having projecting radius-arms and axial pintles, of the companion leaf having opposite radiusarms with eye and open slot, respectively, to engage said pintles, and a coil-spring pivotally linked to the open-slot radius-arm and at its other end secured to the opposite hingeleaf, whereby the radius-arms are held in place and the hinge is free to turn under stress of the spring, substantially as described.

4. The combination, with the hin ge-leaf having projecting radius-arms and axial pintles, of the companion leaf having opposite radiusarms with eye and open slot to engage said pintles, respectively, the trunnion-seats extending between said leaves and sustained by one of them, the trunnion-shaftrestin g thereon and furnished with a terminal crank,.and the connecting-link pivoted to said crank and to a wrist-pin on the leaf radius-arm having the open slot, substantially as described.

5. The combination, with the hinge-leaves joined pivotally together and with the trunnion-seats extending between said leaves and sustained by one of them, of the trunnionshaft mounted in such seats, said shaft being furnished with a terminal crank and with an inner retaininglug or lip to engage the wall of the trunnion-seat between them, the shaft being provided also with a longitudinal way or groove, the coil-spring inclosing said shaft and having one end inturned to slide and rest in saidgroove and its other end outturned and secured to the adjacent hinge-leaf, and the connecting-link joined pivotally to the terminal crank of the trunnion-shaft and to the companion hinge-leaf opposite that which sustains the end of the coil-spring, substantially as described.

CHARLES MORROVV.

Witnesses:

JAMES H. PEIRCE, JOSEPH KEENE.