Door-Spring. Page: 2 of 4
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UNITED
STATES
PATENT OFFICE.
DANIEL W. BROMLEY, OF WILMORE, KENTUCKY, ASSIGNOR TO IIUGII W.
HARRY, OF DALLAS, TEXAS, AND WILLIAM BRADFORD AND CITARLES
BRADFORD, OF FLORENCE, KENTUCKY.
DOOR-SPRING.
SPECIFICATION forming part of Letters Patent No. 684,742, dated October 15, 1901
Application filed July 30, 1900. Serial No 25,327. (No model.)1o all ivhoin, it may concern.
Be it known that I, DANIEL W. BROMLEY, a
citizen of the United States, and a resident of
the town of Wilmore, in the county of Jessa-
5 mine and State of Kentucky, have invented
certain new and useful Improvements in
Door - Springs, of which the following is a
specification.
The several features of my invention and
io the various advantages resulting from their
use, conjointly or otherwise, will be apparent
from the following description and claims.
In the accompanying drawings, making a
part of this application, and in which similar
15 letters of reference indicate corresponding
parts, Figure 1 represents in perspective the
top end near side of a door-spring embody-
ing my invention and attached to the top of
a door and in operation, the top portion of
20 the door and of the adjacent door-frame be-
ing shown in outline. Fig. 2 indicates a cen-
tral vertical section of the door-spring. Fig.
3 is a plan view of the foundation-plate and
of the spring-ratchet. Fig. 4 indicates a plan
25 view of the spring and the cylindrical casing
which contains it. Fig. 5 illustrates a modi-
fication of the means for connecting the ends
of the spring to the central arbor or sleeve
and to the casing.
30 I will now proceed to describe my invention
in detail.
A indicates a supporting-frame having a
tabular surface A2 and vertical sides A3 and
vertical front end A4. The sides A3 are pref-
35 erably cut away from front to rear, and any
vertical rear end flange is altogether omitted.
Through the front vertical flange A' are two
or more perforations A3,through which screws
can be passed for suitably securing the frame
4o A to the door or other object to which the
door-spring is to be attached. It will be ob-
served that this construction of the frame
imparts not only strength for supporting
the spring above against the strain brought
45 to bear thereon, but also on account of its
open form conveniently allows a screw-driver
to be inserted at the rear to screw the screws
at A5 into position. Over this platform AM
and rotatable thereon is a short hollow cylin-
5o der B, which performs the function of a box,for its contents and the office of a pulley as
to its periphery for the cord to be wrapped
around it. This cylinder B is concentric with
the platform A2. Through the platform A2
and the cylinder B passes a bolt C, having a 55
head C2, an angulated portion C3, and a round
portion C4, provided with a screw-thread C',
which extends to the free end of the bolt.
The angulated portion C' fits into a corre-
spondingly - shaped close - fitting angulated 6o
opening in the platform A2. The screw-
threaded end of the bolt passes up and through
the upper end of the cylinder B and is se-
cured in position by means of a washer CI,
resting on the top B2 of the cylinder B, and 65
a nut C', engaging the free end of the bolt C4
and screwed down upon the washer C6. The
washer Ca gives the cylinder B an opportunity
to turn without moving the nut C7. On the
round portion of the bolt is located a sleeve 70
D, suitably connected to a spiral spring E,
which winds around the sleeve. A preferred
mode of uniting them together consists in
forming in the sleeve D a notch or slot D2,
substantially as shown, and the end E2 of the 75
spring being bent inward and backward in
the form of an angulated hook is introduced
into the slot and is thereby securely held in
place. The other end of the spring is suit-
ably secured to the cylinder B, preferably as 8o
shown-to wit, the outer end of the spring is
provided with a hook E3, engaging hook F,
having shoulder F2 and end portion F3, which
latter is close to the cylinder B.
A bolt or pin G extends through the verti- 85
cal walls of the cylinder B and through the
portion F3 of hook F and is made to secure
the latter firmly to the inner wall of the cyl-
inder. The outer end of this pin is provided
with a hook G2, arranged to receive the cord 90
II, which is to be wound upon the cylinder B
and form the connection between this spring
device and the upper walls of the door-frame
or other stationary piece to which it is to be
attached. The spring G2 affords a conven- 95
ient means of attaching a looped end of the
cord H. I find it desirable to provide my
spring with means whereby its tension may
be increased or diminished, according to the
weight of the door to be closed or the dis- 100
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Bromley, Daniel W. Door-Spring., patent, October 15, 1901; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth514267/m1/2/?q=%22%22~1: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.