Improvements in Springs for Doors or Flaps.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Springs for Doors or Flaps.
I, ALFRED DOMAN, of Terry Street, Kates Hill, Dudley, in the County
of Worcester, Manager of Iron Works, do hereby declare the nature of this invention
to be as follows:
My invention relates to an improvement in springs such as door springs and the
like and is of the following description. A pivot or pin of metal or other suitable
material carrying coiled springs or a coiled spring with projecting arms in such
manner that when the pivot is fixed to the door post and the arms of the springs
rest on the door on opening the door the springs are further coiled or uncoiled so
as to cause it to be closed again on being released. The coiled springs are held in
position by having part of the pivot of square or such section that when one or two
of the coils of the spring are bent round it tightly the spring will be prevented
from revolving on the pivot or they may be held by passing part
of one of the coils through a hole or slot in the pivot. The
pivot has two or more holes at right angles to its length through
one or more of which it may be fastened to the door post or wherever it may be
required to fasten the spring by a screw nail or bolt and also by means of these
holes it may be turned by a bradawl or suitable key and then fastened so as to
adjust the spring to the required tension.
At the ends of the spring arms a roller can be carried to prevent the arms
scratching the surface of the door.
It will be seen from the above description that my improved spring may be
used for letter clips all kinds of traps and similar devices.
Dated this 15th day of February 1898.
ALFRED DOMAN.
Improvements in Springs for Doors or Flaps.
I, ALFRED DOMAN, of Terry Street, Kates Hill, Dudley, in the County
of Worcester, Manager of Iron Works, do hereby declare the nature of this invention
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 springs used for automatically closing doors or flaps,
and known as door springs, and has for its object to simplify the construction
and fixing and adjusting as regards tension of such springs. To these ends the
Price 81

page_text: invention consists in the combination with a spring of a pin or pivot having one or
more holes passing through its middle part and having its ends of angular or
square section, and in combination with this part of a coiled spring having one or
more coils at each end bent to the shape of the ends of the pivot, so as to fit
closely thereto, and thus be prevented from revolving on the pivot, and having
its middle part prolonged into and forming an arm.
In the accompanying drawing forming part of this specification, A, represents
the pivot having its ends B, B, of triangular or square section; C, C, represents
the spring, having its end coils D, D, bent in triangular shape to fit closely to the
ends of the pivot, and its middle prolonged into an arm E. In carrying out my
invention, I fasten the pivot A to the door post or other fixture by means of
one or more screws passing through the holes provided as shown at G, so as to
cause the arm E to press on the door or flap. Should the spring become slack, I
unscrew the pivot from the door post, take off the spring, give the pivot a one third
turn, then replace the spring and thus add slightly to the tension, when it is again
fixed to the door post. If the ends of the pivot are of square cross section,
I give it a quarter turn, and if greater tension is required, I put the screws
through from the opposite side, and without removing the spring turn the pivot
round while the arm E is resting on the door, then refasten it to the door post,
thus giving a half turn.
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. In a door spring, the combination with a coiled spring of a pin or pivot
which is fastened to the door post or other fixture by one or more screws or nails
passing through its middle part, and having its ends of angular or square section
for the purpose above described.
2nd. In a door spring the combination with a pivot fastened to the door post
or other support by one or more screws or nails passing through its middle part
and having its ends of angular or square section of a coiled spring having one or
more of its end coils bent to the shape of the ends of the pivot, so as to fit closely
thereon and having its middle part prolonged into and forming an arm.
Dated this 8th day of November 1898.