Year: 1888

page_text: I, WALTER ALLAN BOIS, of 4 Wallbutton Road, Brockley, Kent, Gentleman,
do hereby declare the nature of iny said invention to be as follows:-
The object of this invention is to so make or arrange the head and stem of a sliding
bolt, and also the catch portion of the barrel that the bolt is made secure when shot
home.
For the purpose of my invention, I make the head of the bolt of inclined taper in
the fore and aft direction of the length of the barrel and I make the catch portion
of the barrel with an angled slot, within which the stem portion of the bolt head
which is made to correspond may have a free motion forward and backward while
being turned.
The terminations of the angled slot may have recesses for locking the sliding bolt
when pushed home and also when pushed back, the inclination of the bolt being when
acted on in any attempt to open the bolt by an instrument inserted through the door
to relock the sliding bolt if the bolt be acted upon, but the inclined tapered head
will to a certain degree prevent the bolt being so acted upon by the instrument
sliding off it.
By this invention, greater security is afforded to doors of dwelling houses against
the bolt being released by what are known as Draw-hacks.
H. GARDNER,.
166, Fleet Street, London,
Agent for the said Walter Allen Bois.

page_text: I, WALTER ALLAN BOIS, of 4 Wallbutton Road, Brockley, Kent, 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
The object of this invention is to so make or arrange the stem of a sliding bolt, and
also the catch portion of the barrel that the bolt is made secure when shot home.
For the purpose of my invention, I make the stem of the bolt of inclined taper in
aft direction of the length of the barrel and I make the catch portion of
the b..
ith an angled slot, within which the stem portion of the bolt-may have a
free mot forward and backward while being turned.
th
The terminations of the angled slot may have recesses for locking the sliding bolt
when pushed home and also when pushed back, the inclination of the bolt being, when
acted on in any attempt to open the bolt by an instrument inserted through the door,
to relock the sliding bolt if the bolt be acted upon but the inclined tapered head will
to a certain degree, prevent the bolt being so acted upon, by the instrument sliding
off it.
By this invention, greater security is afforded to doors of dwelling houses against
the bolt being released by what are known as Draw-backs.
My invention is shown in the annexed drawings. Figure 1 is a face view of
a door or barrel bolt A with the bolt proper B shot home in the socket C, the stem D
being tapered or inclined almost to a point to prevent any holding thereon or thereto
by an article such as a hook, should any felonious attempt be made such as is often
done with ordinary knob headed bolts after a hole has been drilled in the door and
by then inserting a hooked or looped wire through the hole for the purpose. The
stem D of my bolt. is so set out of the vertical that any article, such as a hook or loop,
would slide off from it. The barrel has a notch F in it, so that when the bolt
is shot home and the stem D turned down, it can be shot a little farther to lock it.
By this means, since the bolt cannot be sarreptitiously drawn back, it cannot be
lifted on account of the shoulder of the notch F fixing the stem D in position.
The barrel E has an incline channel G behind the tongue H, down which the
stem can ride when the bolt B is drawn back, the stem D in this case being
received in a notch I to fix the bolt in a drawn back position, see Figure 2. This
notch in addition to locking the bolt B, prevents it rattling when the door is being
shut to, such rattling being usual with ordinary knobbed bolt stems of barrel bolts.
This draw back position of the bolt B will be understood by Figure 2, which
otherwise is a similar view to that shown at Figure 1.
Figure 3 is a top view of a barrel bolt with the inclined or tapered stem. D partly
lifted, the inclined channel G being clearly seen.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The construction of barrel bolts of which the stem D is of inclined or tapered
shape and without a knob as and for the purpose or purposes set forth and as shown
on the annexed drawings.
2. In a barrel bolt in which an unknobbed stem D is present making the barrel E
with a notch F for the reception of the stem D when the bolt B is shot home as and
for the purpose or purposes described.
3. In a barrel bolt in which an unknobbed stem D is present, making the barrel E
with a notch I for the reception of the stem D when the bolt B is drawn back as and
for the purpose or purposes described.
4. In a barrel bolt in which the stem D has no knob, the making of the barrel E
with an inclined channel G for the knobless stem D to ride in when moved to fasten
the bolt B, said incline G leading to a notch I for fixing the stem in a drawn back
condition as described.