An Improved Bolt for Doors and the like.
Year: 1890

page_text: Date of Application, 7th May, 1890
Complete Specification Left, 6th Feb., 1891-Accepted, 7th Mar. 1891
PROVISIONAL SPECIFICATION.
An Improved Bolt for Doors and the like.
AUGUSTUS WILSON, Crown Villa, Clarendon Road, Weston-super-Mare,
Somerset, Gentleman, do hereby declare the nature of this invention to be as
follows:-
Over the bar of the bolt is fixed a small spring lever with a catch in it, which
upon the bar of the bolt being forced out, the catch of the lever springs into one or
more holes or racks cut in the bar of bolt making it very secure from the outside,
but easy to open inside, together with being very simple. The bar is round but
flaten one side to keep the holes or rack in place for lever to act upon.
1000
AUGUSTUS WILSON.
COMPLETE SPECIFICATION.
An Improved Bolt for Doors and the like.
I, AUGUSTUS WILSON, of Crown Villa, Clarendon Road, Weston-super-Mare,
in the County of Somerset, Gentleman, 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 :-
My invention relates to an improved method of constructing bolts, for use upon
doors, cupboards and the like, and has for its object a means, whereby the door or
cupboard fastened therewith cannot possibly be opened from the outer side
thereof.
In order that my invention and the manner of operating the same may be clearly
understood I have appended the accompanying sheet of drawings.
Fig. 1 is a plan view and Fig. 2 a side elevation of a finished bolt fixed in position
upon a door or the like.
Fig. 3 is a side elevation of one type of bar used in the construction of said bolt,
having ratchet shaped slots or serrations formed thereon.
Fig. 4 is a plan view of bar similar to Fig. 3 but with holes formed therein instead
of slots.
In carrying my invention into effect I provide a plate A furnished with suitable
rew holes, to which I attach or form integrally therewith, a casing A', of such a
length that the bar B when idle may be wholly contained therein, said case A¹
externally, is preferably shaped as shewn in the drawings, but internally it may be
of circular, polygonal or any shape in cross section to suit the outer configuration
of the bar B. In the accompanying illustration I have chosen to represent the
bar B of circular cross section, but these may be of any desired shape with one or
Within the
more flat sides formed thereon to suit the requirements of their use.
upper surface of A¹ 1 form an opening C through which may be seen one or more
of the serrations or holes D formed upon, or within the bar B. A spring catch or
lever E is swivelled upon the upper surface of A¹, one end of which is bent down-
ward at a and passes through C and engages with one or the other of the ratchets
or holes D when the bar B is shot out, or in use, and holds B in that position and
prevents its return until E is pressed down at the opposite end against the tension
of the spring, when B may be returned within A'. To facilitate the operation of
of BI form a slot F in the upper surface of A' through which passes a threaded
stud G attached to or forming part of a knob or handle H. The stud G is screwed
into a suitable hole in B so that the longitudinal movements of H within F gives a
corresponding movement to B. The end 6 of the spring catch E being close to H

page_text: when Bis shot out of A', the release of a from D and the backward movement of H
is performed in one operation, as the finger used to move 11 may also press upon ↳
and so release a from D. A suitable slot of any of the types in general use, may
he employed to receive B when in use.
1
In fixing a bolt of the types that have hitherto been made and used upon a door
or the like the space left between A' and I invariably occurs immediately over the
division of the door and its frame d, and if this division be abnormally large a
pair of scissors or the like may be passed through from the outer side of the door so
as to grasp B and push it back and thus unbolt the door. The same space between
and d may exist when my improved bolt is used, but it is simply impossible to
operate upon B in a similar manner, by reason of the tension of the spring upon E
holding within D, and until is depressed B cannot be removed froin I.
I do not confine myself to any particular metal, or alloy of metals from whic
construct my said bolt, or to the exclusive use of any particular type of spring or
operating the catch E and
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is :-
In an improved self locking bolt for use upon doors and the like, the use and appli-
cation, and inethol of construction thereof, in combination with a case A with slots (',
and F. and screw handle H, and carrying a spring enteh E. engaging with holes, or
serrations D, within, or upon a bar 15, substantially as and for the purposes herein
described and shewn by the appended drawing».
B01
GEO. TITOS. HYDE,
4, Moorfields, Fore Street, London, E.C., Agent for the Applicant.