Door or Window Fastener.
Year: 1891

page_text: Date of Application, 13th Apr., 1891
Complete Specification Left, 13th Jan., 1892-Accepted, 13th Feb., 1892
PROVISIONAL SPECIFICATION.
Door or Window Fastener.
JOSEPH LEE 12 Monson Road Tunbridge Wells Kent do hereby declare the
nature of this invention to be as follows :—
Two metal plates with sections of an internal screw cut upon their faces which
pieces of metal to be fixed upon stile of door or sash of window & frame of
door & window. Then when the door or window is closed I put a screw or
grooved piece of metal into the sections of the screw cut upon the two pieces of
metal aforesaid.
COMPLETE SPECIFICATION.
Door or Window Fastener.
I, JOSEPH LEE of 12 Monson Road, Tunbridge Wells, Kent 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 this invention is to provide means for securely fastening doors and
windows. For this purpose I fix a metal plate upon the edge of the stile of the
door on the lock side and a corresponding metal plate opposite on the door frame.
The plates should be let in flush. In each plate is formed a section of an internal
screw thrend. In these latter I fit a screw so as to engage with the said
screw sections and having by preference the thread cut away on one side. Instead
of screw thread I may use vertical parallel grooves. When the screw or grooved
bolt is turned so that the threadless or grooveless part is flush or parallel with the
joint between door and door frame the fastener is undone, and when turned partly
round it is fixed and holds the door. The invention is also applicable to hinged
windows, fanlights and the like, and to the fastening of the bolts of locks and latches
the bolt being formed with part screw thread or grooves.
In the accompanying drawing
Fig. 1 shows a door fitted with my fastener near the top and bottom at A and B
taking may be the place of ordinary top and bottom bolts for the inside of street
doors or other doors and fitted with my fastener to the lock at C.
Fig. 2 is an edge view of the door with the fastener applied as at A and B
Fig. 1.
Fig. 3 is a cross section on line D E of Fig. 2 shewing the three main parts of
the fastener riz. the metal plate a which is fixed by screws a' into the edge of the
stile of the door, the metal plate which is fixed opposite by screws into the
inside of the door frame and the screw c which is made to screw into the screw
thread sections cut into the plates a and and which serves to unite the door firmly
with the door frame. The screw c has by preference the screw thread cut away on
one side as shewn, and when this part comes opposite to the plate as shewn here
the fastener is undone but when the screw is turned partly round, so that the stop c²
enters an upper recess in the plate a the screw threaded part of the screw cengages
with the screw thread section of the plate and holds the door firmly to the frame.
is a handle for turning the screw. Any other suitable stops may be provided
instead of the arrangement shown. If the screw thread were not partly cut away
on the screw it would take several turns to fasten or undo the fastener, and the
screw when quite removed might be easily lost or mislaid. The screw threads

page_text: should be deep in order that the fastener may remain efficient even if the door
should shrink somewhat after being fitted therewith.
Fig. 4 is an edge view of the fastener as adapted to fastening the bolt of a door
lock (or it may be a latch lock).
Fig. 5 a part sectional view and Fig. 6 a view of the fitting on the inside of the
door frame as at C, Fig. 1. In this case the plate a on the door and the plate bon
the door frame have as before corresponding sections of screw thread wherein
fits the screw c which engages with a screw thread section formed in the underside
(or upper side) of the bolt of tor it might be of the latch of a latch lock).
Fig. 7 is a side view and Fig. 8 a cross section of a modified form of fastening bolt
which is not formed with screw threads as in the previous cases but with vertical
parallel grooves and flanges the plates a and b being formed with corresponding
sections of flanges and grooves.
The fastener being applied to the inner side of the street door or other door affords
complete security against the entry of burglars or other unauthorized persons.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
A fastener for doors, windows, and the like consisting of a plate fixed to the edge
of the door or window a plate fixed opposite it to the inside of the door or window
frame both plates being formed with corresponding sections of an internal screw
thread (or vertical parallel grooves) and a screw or bolt for fastening the parts
together, substantially as set forth.
Dated this 13th day of January 1885