An Improved Automatic Catch or Holder for Doors or the like.
Year: 1894

page_text: Date of Application, 28th Nov., 1894-Accepted, 5th Jan.. 1895
COMPLETE SPECIFICATION.
An Improved Automatic Catch or Holder for Doors or the like.
We JOHN WILLIAM HARRISON of 5 Hedon Road, Hull in the County of
York, Merchant, and JOHN ROBINSON, of 2 Cavendish Street Grimsby in the
County of Lincolnshire, Engineer, 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 :-
The object of our invention is to construct a simple contrivance applicable to
doors and the sides, walls, partitions or the like, to act as an automatic for the
purpose of catching and holding the door or the like open.
DESCRIPTION OF DRAWINGS.
Fig. 1 shews my improved contrivance attached to a door and to the side of a
door.
Fig. 2 shews plan of scroll spring.
Fig. 3 shews front view of bobbin for gripping spring.
For the purpose of our invention we employ a scroll spring A which is attached
to the side of the door B on the side which opens, thus if the door opens outward,
the spring is fixed on the outside, and if the door opens inward, the spring is fixed
on the inside, this spring may or may not be held in a plate or bracket C, as desired,
if held in a bracket, such bracket would be affixed to the doors by screws D as
shewn.
To the door post, wall, partition or the like E, against which the door presses
when open, we attach a metal clip or bobbin F, for clipping the spring on the door,
the inner ends of this bobbin are hollowed as shewn in dotted lines G.
When the door B is opened and pushed back, the spring A comes in contact
with the bobbin F, the barrel of the bobbin passes between the two coils of the
scroll spring, and the spring is compressed by the ends of the bobbin, such ends
being hollowed, the bobbin gives a greater grip and entirely prevents the spring
slipping out when it is once gripped, the door is therefore held firmly open until it
is desired to release it, when a slight pull releases the spring A from the clip or
bobbin F, but it is impossible for the door to release itself.
The arrangement of the bobbin and spring may be varied if desired, the bobbin
being placed on the door, and the spring on the door post.
When used in connection with the doors of ships, as the door is opened and the
bobbin enters the spring, it prevents the door fouling the bulkhead thus preventing
shaking or rattling.
This contrivance can be used in connection with scuttle doors for batchways and
for almost if not all constructions of doors.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
An automatic catch consisting of a suitable spring A, and a clip or bobbin F for
holding doors and the like open substantially as shewn and described.
Dated this Twenty-seventh day of November 1894.
JOHN E. WALSH,
Savile Street, Hull, and Crossley Street, Halifax,
Patent Agent for the Applicants.
JOHN E. WALSH,
Savile Street, Hull, and Crossley Street, Halifax,
Patent Agent for the Applicants.