improvements in Door Springs, Particularly Applicable to “Climax" Door Springs.
Year: 1885

page_text: improvements in Door Springs, Particularly Applicable to
“Climax" Door Springs.
I, JOHN CARTLAND of Constitution Hill Birmingham in the county of Warwick
Brassfounder do hereby declare the nature of my invention for IMPROVEMENTS IN
DOOR SPRINGS PARTICULARLY APPLICABLE TO "CLIMAX" DOOR SPRINGS, and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
My invention consists in providing a ready, effectual, and easily accessible
arrangement whereby the effect of the wear of the working parts of floor door
springs, (particularly that which is known as the "climax" door spring) is com-
pensated for.
In swing doors either single or double, which are acted upon by springs, after
the spring arrangement has been in operation for some time the working parts
wear more or less, and in proportion to this amount of wear, so the door or doors
do not come to "rest" in a central position, or, what may be said when there are
double doors, they do not come to "rest" exactly and in a line, opposite to each
other.
In order to remedy this defect, and at any time to adjust the "rest" position
of swing doors acted upon by springs similarly as shewn upon drawings herewith
appended, I have devised and arranged this my said invention.
I will now describe my invention more particularly by the assistance of the
accompanying drawings which have letters and figures of reference thereon..
Upon the drawings like letters refer to the same identical thing throughout.
Fig. 1 is a plan of the arrangement.
Fig. 2 is a sectional elevation of Fig. 1 upon line b, c.
Fig. 3 is an elevation of the spring box shewing the adjusting screw a.
Fig. 4 is a part sectional plan of Fig. 1 upon line d, e, of Fig. 3.
Fig. 5 is a plan and two elevations of the screw down plates f & ƒ1.
Fig. 6, is a detail elevation shewing method of attaching springs to lever o.
The action of the spring arrangement will be understood to be as follows:-
The box or case g, in which the details are arranged is let into the floor.
strong upright pivot h, rests in a footstep bearing at i, while its upper end is
A

page_text: supported and held in position by the plate j, and also further shaped square or
other suitable shape at k, to fit into the shoe 7 of the door. A roller m is mounted
upon the pivot h which acts upon the two inclined arms n, & n 1, of lever o. This
lever o is formed with trunnion bearings or centre pins p, & p 1, which oscillate
in, and are carried by the dovetail screw-down plates f and fl. This lever o is
further provided with arm or arms r, to which are attached a spiral spring or
springs 8, the other ends of such springs being secured similarly as shewn at t.
When in action the shoe 7 of the door fits upon the upper end of the pivot h,
and upon swinging the door it will be seen that the roller m lifts the inclined
arms n & n 1 against the tension of the springs; and in so doing the trunnions or
pins p, & p1 in course of time wear more or less in their bearings, and from any
irregularity of such, or other wear in any of the parts it will be readily seen that
the "rest" position of the door will be correspondingly affected. To compensate
this irregularity and bring the door into the correct position when at "
I provide upon each side of the box or case g an adjusting screw pins a, & a 1, 1
which are placed in a coincident position with the trunnion bearings of the
lever o.
rest
"
It will now be readily, seen that upon slacking one of the pins, and tightening.
the other pin, or, vice versa, the lever o will be thrown to the one side or the
other at will, and by acting upon the roller m, and thence to the upright pivot h, 1
the position of the door will be adjusted perfectly as required.
The dovetail screw down plates f& f1 I slide into corresponding dovetail
slides w, w 1, w2, w3, by which means the structure is made very rigid and firm.
Further, Hitherto the springs & have been attached direct on to the lever o, by
means of hooks or other projection formed thereon, but it is found that when the
springs break, they generally break at this point, owing to the rubbing action of
the hook upon the spring. To obviate this I mount in any suitable manner, rollers,
similar to those shewn at v, so that the friction is transferred from the spring to
the roller instead, and, hence no motion between the roller and the spring.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed. I declare that what
I claim is
1st. The adjustable screws acting upon the trunnions or centre pins of the
lever o, by which the "rest" position of the door is regulated, substantially as
herein described and shewn upon the drawings, or any mere modification of the
same.
2nd. The attachment of the spiral springs to the lever o, by means of rollers as
herein described and shewn upon the drawings.