US7953A - Improved double-acting spring-hinge - Google Patents

Description

To all w21/0m `1325 my concern,.- Be `it known that I, THEODORE F. ENGEL] BRECHT, of the city, county, and State of New l UNITED STATES..

PATENT OFFICE "THnoDoRE F, ENGELBRlicHn oF NEW YORK, N Y."

JJIMPROVED DOUBLE-ACTING SPRING-HINGE,

i Speciiication forming part of Letters PatentNo. `7,953, dated February 25, 1851i.

York, have made a certain newand useful Improvement,A being `a Self-Acting Springf Hinge for theEntrance-Doors of Hotels and i other Buildings," and I dollerebydeclaretthe following to be a `full and cleardescription thereof, reference being had to the annexed drawings, makingpart` of this specificationl Figure l represents asectional elevation of the door and door-frame, showing the springllinge. Fig. 2 is a vertical section through the spring-hinge, the door being in a closed position. is a vertical section, the door y being opened fromthe outside and the upper spring being contracted lengthwise its coil and unwound. Fig. @is a horizontal section lbl showing`thespindle,tumbler, and inclined ,.plane.. 1. f

The same letters on the above Iigures indis cate thesanie parts.

The cylindicalcase which forms the "hinge" and within which the spindle, `cylindrical ro tating tumbler, and springs are inclosed con` sists of three parts or `sections AB C,the parts or sections lettered A C'being secured to aplate 1).which isconined by screw-bolts to the frame of the door, andthe part or ceny tral section B, which is confined bymeans of ,rims or flanges d a, projecting from said central' section B and iitting into grooves correl sponding with the rimsor flanges in themad- `jacent ends pot` the parts or sections A C,is

l the upper section A of the case, by which the spindle F is prevented from turning during the opening and closing ofthe door. The middle of this `spindle F islincreased in `diameter to form acylindrical` shoulder H, on

the upper end of which is formed an inclined plane I, commencing from a point c near the middle of the length 'of said shoulder and eX- tending on either side of the spindle to the topofthesame. l w

` J is a rotating cylindrical tumbler open at both ends and made to fit over the cylindrical shoulder H of the spindle F and provided with a heart-shaped projection Kon its innerV i side for the purpose of passing over said in-` clined plane I on the opening and closing of the door, the movement ofsaid heart-shaped `projection being from the lowest point of the inclined plane I to a point diametrically opf posite, as shown in Fig. 3,rhe object of which is to allow the door to lind its own center or `be checked inits movement when the point i of the heart-shaped projection shall have passed the lowest point of theinclined plane, i

and thus the door isclosed and held in that position by means of theinclined planeI and i proj eetion K of theI cylindrical rotatingv tumr;

`been opened from the outside the spring L will be contracted lengthwise its coil and at` the same time be unwound, andthelower springlVI will be wound up and expanded lengthwise its coil, and will' `thus force the" door `closed y on Vbeing relieved.

section or partCof -the case, one end of which is secured to the cylindrical rotating tumbler J and the other end in the end ofthe section C ofthe case in such a manner that .when the door G shall have been opened from the inside the spring Mwill` be `unwound andat the same time be expanded and will force the door closed on being relieved. `The springs L M do not act independently, but assist each other, one being contracted lengthwise .its

coil and wound up, while the other is eX- panded and unwound during the opening and closing of the door. The upper springL may be made stronger than the lower one for the purpose of preventing the door from being opened by the outside.

The spindle F, in connection with the cy` l lindrical rotating tumbler J, is made to `rise and fall alternately (the spindle moving down l and the tumbler up) during the passage of the heart-shaped projection K over the inl clined plane I sufficiently to impart to the L `is a `helical `spring inclosed in the upper l section or part A ofthe case, one end of which'` t,

is attached vto the Vcylindrical rotating tum-i` bler J "and theother end to the cap-nut Gjin such a manner. that whenthedoor shall have M is a helical `spring confined in the lower l pressure of the wind from the springs L M a contraction Aand expansion lengthwisetheir coil in connection with the Winding up and unwinding of said springs, by which they are made to act by torsion and expansion by the motion 'of the door in either direction, and thus each spring is made to have the effect of vtwo in closing the door. The middle section B of the hinge-case is provided with a slot N .to receive-.the head ot a pin or screw O, screwed into the tumbler J, to allow the tumbler to rise and fall in connection with the movement of `the spindle F, and by which screw the tumbler 'J is secured to the central section B of the hinge-case and caused to rotate therewith when the door shall have been vopened -or closed. These sprin g-hin ges may be-entirely concealed With-- in the door and .door-frame,wand4 thus relieve the door from the appearance of hinges and springs ordinarily employed, `the hinge being a cylindrical sectional case confined in the door andv inclosinglthe springs, spindle, and tumbler, so i thatthe whole is concealed from View, the edge of the door being convex and made t0 iitla corresponding concax'ity in the door-frame. .1.

Having thus described my improvements in the spring-hinge for the entrancedoors ot' hotels, &c., I wish it'tobe understood that I do not claim the combination of an adjustable curved inclined plane with a portion of a hinge and an adjustable bearing-rollervwith the other portion of the hinge; but

What I do claim as new, and desire to secure by Letters Patent, is-

The manner ot' combining thel vhelical springs L and Mwith the cylindrical rotating tumbler J and cylindrical sectional case, so that by the rotation of the cylindrical tumbler J the heart-shaped projection K will be made to traverse over the inclined' plane I and cause the tumbler J to Vrise and fall, and thus compress and expand the helical springs lengthwise their coil and simultaneously therewith wind and unwind said helical springs around the spindle F, and thus cause them to act (by the motion of the door in either direction) by torsion and expansion to close the door wh en it shall have been opened, as described and represented.

In testimony whereof n I have `hereunto signed my name before two subscribing Witnesses.

THEODORE F. ENGELBRECHT.

Vitnesses:

A. E. H. JoHNsoN, J. L. SMITH.

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