IMPROVEMENTS IN DOOR SPRINGS
Year: 1884

page_text: I, ANDREW MOMILLAN, of House Lodge, Thornliebank, in the County of Renfrew,
North Britain Joiner, do hereby declare the nature of my said invention for
"IMPROVEMENTS IN DOOR SPRINGS and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement, that is to say :-
My said Invention relates to door springs of the kind for which I obtained a
Patent dated 21 May 1881 N° 2222, and has for its object to improve and simplify
the construction or arrangement of parts of the device, so as not only to render
the same less costly but also to make it more durable and less liable to get out of
order.
My improved door spring is shown upon an accompanying sheet of explanatory
drawings on which figure, 1, is a sectional plan showing the door in its closed
position, whilst figure, 2, is a similar view with the door in a partly opened position.
Figure, 3, is a sectional elevation corresponding to figure, 1. In these drawings
the same reference numerals are used to mark the same or like parts wherever
they are repeated.
My improved spring device is applicable to doors which open or swing both
ways as well as to those arranged to open one way only; and in figures, 1, and 2,
dotted lines, 4, indicate the double-acting hinges employed with a door swinging
both ways, whilst the hinges, 5, shown in full lines are such as are used with a
door swinging one way only. A groove, 6, is formed in the top of the door, 7, to
receive a helical spring, 8, of which the outer end or that further from the hinges
is engaged upon a hook, 9, fixed to the bottom of the groove. The inner end of
the spring, 8, is engaged upon a hooked link, 10, which is jointed to a lug or
projection, 11, formed on a plate, 12, which is screwed to the door frame, 13. This
lug, 11, projects into the groove, 6, of the door, and in consequence of the centre or
joint of the link, 10, in the lug, being situated relatively to the hinges in the
position in which it is shown, the spring, 8, becomes stretched on opening the door
as will be seen on comparing figures, 1, and 2. I prefer to fix a metal mounting, 14,
at the corner of the door to protect the inner end of the groove, 6, and I also
prefer to cover the groove with a thin metal plate, but these parts are not absolutely
required.
Instead of the groove, 6, at the top of the door a horizontal recess for the spring
may be formed across any convenient part of the door; but I prefer to place the
spring at the top as when it is in that position its tension assists in supporting
the overhanging weight of the door,

page_text: I do not restrict myself to the precise details herein described or delineated
provided that the distinctive features of my Invention are retained; these being,
1 the combination of parts constituting the door spring, and 2, the connection of
the spring to a centre situated relatively to the other parts as herein described
and shown.
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
1. The improved combination of parts constituting a door spring as hereinbefore
described.
2. The connecting of the spring to a centre situated relatively to the other parts
substantially as herein described and as shown on the accompanying drawings.
Dated this twenty-ninth day of September 1884.
EDMUND HUNT,
Applicant's Agent.