An Improved Gravity Button or Hasp for Securing Cupboard or other Doors.
Year: 1893

page_text: Date of Application, 9th Nov., 1893
Complete Specification Left, 30th Nov., 1893-Accepted, 30th Dec., 1893
PROVISIONAL SPECIFICATION.
An Improved Gravity Button or Hasp for Securing Cupboard or
other Doors.
I, JAMES DUNN of 25 Lumley Street Millfield, Sunderland in the County of
Durham, Marine Engineer do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved gravity button or hasp for securing
cupboard or other doors.
To effect my purpose I form the button or hasp of a peculiar shape more or less
resembling the letter P or the letter U with an horizontal extension on an arm
thereof and I so distribute the metal in the button or hasp that when pivotted at or
near its central point the arm assumes a horizontal position or nearly so under
gravity.
The arm may act as the closing hasp or button which can be easily swung round
by hand but at sea the improved button or hasp will be found especially useful in
preventing doors swinging open when not so required.
The hasp is made to suit both right and left hand doors and its precise shape
though foreshadowed as above is immaterial provided the pivotting point and the
weight are distributed to maintain the position described under the action of
gravity.
Dated this 8th day of November 1893.
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.
COMPLETE SPECIFICATION.
An Improved Gravity Button or Hasp for Securing Cupboard or
other Doors.
I, JAMES DUNN of 25 Lumley Street Millfield, Sunderland in the County of
Durham, Marine Engineer do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to an improved gravity button or hasp for securing
cupboard or other doors.
To effect my purpose I form the button or hasp of a peculiar shape more or less
resembling the letter P or the letter U with an horizontal extension on an arm
thereof and I so distribute the metal in the button or hasp that when pivotted at
or near its central point the arm assumes a horizontal position or nearly so under
gravity.
The arm may act as the closing hasp or button which can be easily swung round
by hand but at sea the improved button or hasp will be found especially useful in
preventing doors swinging open when not so required.
The hasp is made to suit both right and left hand doors and its precise shape
though foreshadowed as above is immaterial provided the pivotting point and the
weight are distributed to maintain the position described under the action of
gravity.
I will fully describe my invention with reference to the accompanying drawings
in which
Figures 1 and 2 show a front or side view and a plan view and in the following
description like marks of reference designate like parts.
D
017

page_text: Referring to the drawings it will be seen that the hasp A B C D formed in metal
of any suitable description is pivotted at B and in the drawing the part A B is
acting as the closing hasp or button, being maintained in the horizontal position by
the distribution of the metal as shown in the part B C D of the hasp.
The drawings show the hasp pivotted on for example a plate P screwed to a
fixed door E or the equivalent thereof, and arranged so that the arm A B normally
keeps door E shut. A plate P¹ is similarly screwed to door E' to facilitate the
working of the hasp.
The hasp is so balanced that when either end of it is depressed and then
released it will automatically re-assume a horizontal position under the action of
gravity.
By reversing the sides contiguous to the door the hasp is obviously adapted to
suit both right and left hand doors.
The plates P and P₁ need not necessarily be used as the hasp might be pivotted
direct to a door or its equivalent but it is obvious that the metal hasp is better
calculated to work smoothly when mounted on a metal base plate.
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 gravity button or hasp pivotted at or about its central point and
having the metal whereof it consists so shaped and distributed as to cause the hasp
arm A B to normally assume and maintain an horizontal position substantially as
and for the purposes herein set forth.
2. The improved gravity button or hasp for securing cupboard or other doors
substantially as herein set forth.
Dated this 20th of NL
1
+
1000
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.