Year: 1894

page_text: being date of first Foreign Application (in 25th June, 1894
United States of America),
Date of Application (in United Kingdom), 27th Dec., 1894
Complete Specification Left, 27th Dec., 1894-Accepted, 29th June, 1895
Date of Application (in United Kingdom), 27th Dec., 1894
Complete Specification Left, 27th Dec., 1894-4ccepted, 29th June, 1895
COMPLETE SPECIFICATION.
I, JOSEPH KEENE, of No. 493 Carroll Avenue, Chicago, Illinois, United
States of America, Manufacturer, do hereby declare the nature of this invention
and in what manner the same is to be performed to be particularly described and
ascertamed in and by the following statement:-
This invention bas for its object to improve that class of spring hinges designed
to effect the automatic closing of doors or gates to which they are attached.
Fig. 1 is a front view of a door spring embodying my invention.
Fig. 2 18 a view in vertical section on line 2-2 of Fig 1.
Fig. 3 is a view in vertical section on line 3-3 of Fig. 1.
Figs. 4, 5 and 6 are detail views of the spring support.
Figs. 7, 8 and 9 are detail views of the turning sleeve or hub.
Fig. 10 is a detail front view of one of the brackets and pintlo connected
thereto
A designates the spiral spring, to one end of which is connected a bracket B.
The bracket B is provided with a core & that enters the end of the spring, this
core being preferably cast with a spiral groove to receive the end coils of the
spring and preferably also with a recess upon its underside into which the extreme
end of the eping will be bent in order to securely retain the bracket in engagement
with the spring. The opposite end of the sping A is connected to a bracket C
from the base plate of which projects the part c and to this projecting part c 18
connected the pintle D. By preference the pintle D is rigidly connected to the
bracket, the end of the pintle being preferably fixed to the projection c in the
operation of casting the bracket Upon the pintle D is mounted n spring support E
that is revolubly sustained with respect to the bracket C and this spung support is
formed with a core e that enters the end of the spiral spring A and is preferably
furnished with a spiral groove to receive the end coils of the spring and with a
recess e into which the extreme end of the spiral sping may bend in order to
securely hold the spring upon the sping support The pintle D 18 preferably
provided at its outer end with a head, (and if desired also with a washer) in order
to retain the spring support and the spring in connection with the bracket C so
that any danger of accidental loss of the parts will be avoided
In order to enable the sping support E to be adjustably connected with the
bracket C so that the tension of the spring A can be made as strong or light as
desired, interpose between the sping support E and the bracket Ca shifting hub
or sleeve F, the construction of which is more particularly shown in Figs. 7-9 of
the drawings. The shifting sleeve F 18 mounted upon the pintle D and is revoluble
with respect to the bracket C and one end of the shifting sleeve bears against the
face of the extension c of the bincket and is provided with a series of notches f to

page_text: receive a locking pin G. The extension c of the bracket C has its face formed
with a notch or semi-cncular sent so that when either of the notches ƒ of the
shifting sleeve F is brought opposite the notch e' the locking pin G can be inserted
in these co-incident notches and thus securely lock the shifting elcove against
rotation. The opposite end of the shifting sleeve F is provided with suitable
means whereby it can interlock with the spring support. E and for this purpose I
prefer to employ the means illustrated in the accompanying diawings, that is to
ay, the shifting sleeve is provided with a series of seats adapted to receive a
series of projections or lugs on the end of the spring support E Preferably the
seats or notchies" of the shifting sleeve are of such depth as not only to insure the
interlocking of the sleeve with the spring support but also allow enough space to
permit a tuning bar to be inserted into the seats or notches f¹ in order to turn
the shifting sleeve when the tension of the spring A 18 to be varied.
In carrying out my invention I prefer to cast the bracket C with the pintle D
therein as shown in Fig. 2 of the diawing. The spring support E is also preferably
cast in a single piece as the shape of this support is such as to permit it to be cast
in piece and without the necessity of tool work So also by forming the shifting
sleeve as shown I am enabled to make this piece of a single casting and thus
avoid the necessity of drilling holes in order to provide means for tanning the sleeve
and as well also the necessity 18 avoided for cutting the sleeve to form seats to
engage the lugs of the spring support. When the spring support E and the
sleeve Fare assembled upon the pintle D, and the end of the spiral spring A has
been attached to the spring support, the parts will be securely held together and
they can be polished upon an ordinary wheel in the usual manner and thus a much
better fish and appearance can be given to the springs than is possible with any
other springs of this type. In prior constructions of spring hinges it has been
proposed to provide the spring support with perforations extending at night angles
through the support to receive the bar for turning the spring in order to give the
deaned tension bereto, but this method of making the perforations is objectionable
because in diilling the perforations at right angles to each other there is
constant danger of breaking the dulls as they pass through the first perforation
in drilling the second.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same 18 to be performed, I declare that what I
claim 18:-
1. A door spring comprising the combination of a bracket having a raised part,
a pintle cast with and extending inwardly from said raised part of the bracket and
having a head or stop at its free eud, a toision sping, a support for said spring
revolubly mounted upon the free end of said pintle and held in place by said head
or stop and suitable means for locking sand spring support in different positions with
respect to said bracket, substantially as described.
2. A door spring comprising the combination with a bracket, having a raised
hub e provided with a notch, a pintle projecting from said hub, a sleeve F
revolubly mounted upon said pintle D, and provided with the notches upon one
end and the notches upon the opposite end and a spring support E provided with
projections to engage the noti hes fl of the sleeve, said spung support beig
revolubly mounted upon the pintle D, substantially as descubed.
Dated this 15th day of October AD 1804
JOSEPH KEENE.
Ilaseltine, Lake & Co,
45, Southampton Buildings, London, Agents for the Applicant.