Improvements in Door Catches for Holding Doors.
Year: 1892

page_text: Date of Application, 29th Mar., 1892
Complete Specification Left, 17th Dec., 1892-Accepted, 18th Mar., 1893.
PROVISIONAL SPECIFICATION.
Improvements in Door Catches for Holding Doors.
THOMAS STARKEY 170 South Street Moor, Sheffield Ironmonger WILLIAM
ARTHUR STARKEY 170 South Street Moor Sheffield Ironmonger do hereby
the nature of this invention to be as follows:-
Our invention relates to improvements in those catches which have a ball or
projecting bolt (with springs at back) which on door being closed slide into
striking-plate. Those hitherto made have had the ball or catching bolt of metal
of some kind, and the noise and rattle of these are very considerable, especially
when fitted to doors swinging both ways. In our invention we make the ball or
catching bolt of india rubber and of sufficient hardness to withstand wear, yet at
the same time to be intirely noiseless. in action, and the bolt instead of being forced
into its case merely by side pressure against door frame rotates on an axis in the
act of closing or opening door. The projecting ends of spindle or axle revolve in a
frame and are carried by supporting springs. We make the catching bolt spherical
or cylindrical with spindle through its centre.
Dated this 28th day of March 1892.
THOMAS STARKEY.
WM. ARTHUR STARKEY.
COMPLETE SPECIFICATION.
Improvements in Door Catches for Holding Doors..
THOMAS STARKEY, WILLIAM ARTHUR STARKEY Iron Mongers at 170 & 172
South Street Moor Sheffield 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 :-
Our invention relates to improvements in catches for holding doors of all kinds
whether cabinet case, or doors of public buildings, & are of the nature (broadly
speaking) of ball catches now so extensively in use, the great difference in our
invention being in the employment of an indiarubber bolt or catch in place of the
iron, steel or brass ones hitherto used, & by our substituting rubber in lieu of metal,
we thereby obtain a noisless door catch, also considerable less wear through the
said catch or bolt being made to revolve in the act of door closing herein after
particularly described.
First. We attain this object by the special arrangement which we have illustrated,
& for better explanation of our invention have appended one sheet of drawing
similar refferances denoting similar parts in the various figures.
Fig. 1. is a view of our invention in position as fixed on door.
Fig. 2. is a view of the rubber bolt with axle.
Fig. 3. is a side elevation (sectional) of the case containing the springs & tubes
in which they work.
The apperatus is morticed into door edge & the action of its working is as follows.
When the door is being closed the rubber bolt B strikes the door frame (or striking
plate which may be fixed on doorframe) & in so doing is rotated on its axis A. & at
the same time the springs S. S, in the tubes T are compressed by the bolt being
forced inwards, & as soon as the door comes to its normal position the bolt is again
forced outwards into cavity of striking plate prepared to receive it.
The springs S. S. are inclosed in tubes T of just sufficent diar. to allow them
being easily compressed by the axle A.; the tubes are slotted for the axle to slide

page_text: in the act of door closing forcing them down & the springs again bringing the bolt
to the front.
In manufactering, the case can be made either to mortice into door edge, or to
screw on door side.
The springs can be of any suitable shape or kind.
The rubber bolt may be of any shape whatever & the axle may be made secure
in the same, so as to revolve with it; or the axle made loose & the bolt revolve
on it.
Furthermore to ensure silent working we place 2 pieces of rubber sheet on the
underside of face-plate in the position where the ends of axle touches it, the
springs forcing the axle up against these strips of rubber cannot therefore make a
rattle.
Having thus described our invention we wish it to be understood that are
aware that similar catches are used for holding doors & do not claim such use
broadly, but what we do claim & desire to secure by Letters Patent is
First. A door catch with a india rubber bolt, B which revolves & has a fixed
axle A through its centre. The said axle sliding in 2 tubes T in which are spiral
springs S. S. and face plate with rubber strips attached on underside for the purpose
specified & substancially described & shown.
Second. A door catch with a india rubber bolt B which revolves, & has an
axle A on which it rotates; said axle sliding in 2 tubes T in which are spiral
springs S. S. & face plate with rubber strips attached on the under side for the
purpose specified and substantially described & shown.
Dated 16th day of December 1892.
THOS. STARKEY.
WILLIAM ARTHUR STARKEY.