Year: 1885

page_text: I ALFRED JULIUS BOULT of 323 High Holborn, in the County of Middlesex
Engineer, do hereby declare the nature of this invention (a communication from
Gilbert R. Elliott of New York, United States of America), and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
This invention relates to an improvement in door checks, the object of which
is to facilitate the closing of doors and to prevent the slamming thereof; and it
consists in the construction, arrangement and combination of parts to be hereinafter
fully explained and pointed out in the claims.
Referring to the accompanying drawings:
Fig. 1 is a central longitudinal section of my apparatus, clearly showing its novel
features.
Fig. 2 is an end view thereof, showing the connection between the door and
jamb.
Fig. 3 is a perspective view of the hub or sleeve.
In the specification, like letters of reference denote like parts throughout the
several figures, in which A represents the cylindrical casing, the ends of which are
provided with apertures forming bearings for the hub or sleeves, b, b¹ and it may
be made of any suitable metal and provided with lateral projections or lugs, a,
having poles for the purpose of receiving screws; by this arrangement the check
is firmly fastened to the door or jamb.
At each end of the case are formed flanges, c, c extending partly around the
circumference of the cylinder these flanges have formed therein, holes d, d, that
register with corresponding holes, e; said holes being arranged at certain distance
apart around the periphery of flange, f, which forms a part of the hub, b, b¹ as here-
tofore referred to are the hubs or sleeves, preferably each hub is cast in one piece
and forms an essential part of this invention; they having the flange, f, into which
are arranged the holes, 6, and an aperture running centrally through their length
in which turns the shaft B. The purpose of this hub or sleeve is to allow the check
CD

page_text: to be operated either from the door or from right to left, when the check is secured
to the door, the shaft B being connected to the hub, b, by means of a screw, i, is
together with the hub, operated in the direction shown by the arrow, 1. The
hub, 61, is here held in place and prevented from turning by pin, g, but forms a
bearing for shaft B, when it is desired to operate the check by attaching it to the
jamb, the pin, g, is removed from the hub, 61, and inserted in the hole formed in
the hub, b, and in like manner screw, i, is reversed.
G is a slot formed in the hubs, through which the ends of springs H pass, and is
secured to and around the shaft, these recesses are arranged to prevent twisting
and working out of place of the spring, and as the ends are passed between the
sides of the recess and secured to the shaft, they greatly help the tension of the
spring; M is a crank-arm formed with the shaft in a single piece, and is bifurcated
at its top to receive the end of the connecting rod, o, which is pivoted therein by
a pintle, q; at the opposite end of the connecting rod, o, is secure in like manner,
a plate bracket, R, provided with screw holes for the purpose of securing the rod
to the door or jamb as may the case might be. 8, is a pin extending through the
end of shaft B, maintaining case might be. 8 is a pin extending through the end
of shaft B, maintaining it in its normal position. The spring being arranged around
the shaft and its ends rigidly held in place in the slot G of the hubs. The door
being opened, unwinds the spring lessening its resiliency so that when the door is
violently shut the spring winds, which motion increases its resiliency and therefore
its resistance, and thus the door is eased to its position without slamming, in its
normal position.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated to
me by my foreign correspondent I declare that what I claim is
1. In a door check, the combination of the casing having flanges formed at its
ends, a lateral projection for the purpose of securing the check to the door or jamb
with a hub or sleeve at each end of the casing, and with the shaft and spring, as
herein before set forth.
o
2. In a door check, the combination of the casing A having flanges, c, c, into
which are formed holes d, for the insertion of pin, g, lugs a, as described, with
hubs b, b provided with flanges, f, having formed therein pin holes, d, an aperture, u,
adapted to receive screw, and the slot G and spring H, as hereinbefore set forth.
Dated this 27th day of October 1885.