Improvements in Locking-bolts or Fastenings.
Year: 1891

page_text: Date of Application, 30th Oct., 1891
Complete Specification Left, 23rd Mar., 1892-Accepted, 23rd Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Locking-bolts or Fastenings.
I, WILLIAM BRENTON, of the East Cornwall Iron Works, Polbathic,
St. Germans, in the County of Cornwall, Engineer, do hereby declare the nature
of this invention to be as follows:-
This invention relates to improvements in that class of bolts or fastenings for
which Letters Patent were granted to me No. 4938 of 1878.
According to my present improvements, instead of shooting the bolt by sliding
the same as described in the Specification of the said former Patent, I now form
the bolt with a rack adapted to be operated by means of a pinion on the spindle
of the handle, which handle is advantageously formed as a hasp so that, when the
bolt is shot, the handle can be turned down over a staple and can be fastened in
that position by means of a padlock passed through the staple.
Where the bolt is to be used for double or heavy doors, in order to obtain a loug
throw, I employ a double rack and two staples.
Instead of securing the hasp to the staple of the pinions as above described I
sometimes attach a permanent handle or knob thereto, the said knob being provided
with a spring which serves to draw a catch-pin into engagement with one or the
other of two holes or slots corresponding with the two positions of the bolt. In
this case in order to lock the bolt I form a kind of staple upon the end of the bolt
and on the case so that, when the bolt is shot, the two staples are brought together
and can be held in this position by means of padlocks.
The spindle of the pinion may be provided with handles at both ends to enable
the bolt to be operated from either side of a door.
Dated the 30th day of October 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Locking-bolts or Fastenings.
I, WILLIAM BRENTON, of the East Cornwall Iron Works, Polbathic,
St. Germans, in the County of Cornwall, Engineer, do hereby declare the nature
of this invention, and in what manner the same is to be performed, to be
particularly described and ascertained and by the following statement :-
This invention relates to improvements that class of bolts or fastenings for
which Letters Patent were granted to me No. 4938 of 1878.
According to my present improvements, instead of shooting the bolt by sliding
the same as described in the Specification of the said former Patent, I now form
the bolt with a rack adapted to be operated by means of a pinion on the spindle
of the handle, which handle is advantageously formed as a hasp so that, when the
bolt is shot, the handle can be turned down over a staple and can be fastened in
that position by means of a padlock passed through the staple.
Where the bolt is to be used for double or heavy doors, in order to obtain a long
throw employ a double rack and two staples.
Instead of securing the hasp to the staple of the pinions as above described I
sometimes attach a permanent handle or knob thereto, the said knob being provided
with a spring which serves to draw a catch-pin into engagement with one or the
other of two holes or slots corresponding with the two positions of the bolt. In
J

page_text: His case in order to 10CK DIC DOLU
and a similar one on the case so that, when the bolt is shot, the two staples are
brought together and can be held in this position by means of a padlock.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawings, in which :-
Figures 1 and 2 are front and end elevations respectively of my improved bolt;
Figure 3 is a section on the line ac, Figure 1; and,
Figure 4 is a section on the line y y, Figures 2 and 3 ;
Figure 5 is an elevation of a bolt adapted for a long throw ;
Figure 6 is a longitudinal section of the same;
Figure 7 is an end view of a bolt in which the bolt proper is designed to be
operated by a knob ; and,
Figures 8, 9, 10 and 11 are views illustrating details of the construction ;
Figure 12 is a front elevation of one end of the bolt shewing how the same is
locked;
Figure 13 is a view illustrating a modification of my invention.
Similar letters of reference indicate corresponding parts in the several figures.
a indicates the case of the bolt, and the bolt proper which is provided at its
central portion with rack teeth c. d is the handle for operating the bolt, which
handle is pivotted to the spindle e carrying a pinion f engaging with the rack
teeth c.
is the staple which is formed integral with the case a for receiving
lock so that when the handle d, which somewhat resembles a hasp, is turned down
over the staple and a lock is passed through the staple the bolt proper cannot be
moved.
g
a
The bolt shewn in Figures 1 to 4 is designed to shoot the bolt for an ordinary
distance only and as the bolt projects through both ends of the casing it is obvious
that the bolt may be used upon a door opening to the right or to the left hand.
The teeth of the pinion and rack are also so proportioned that a half revolution of
the pinion serves to move the bolt from one position to the other so that in either
position the hasp can engage with the staple to enable the bolt to be locked.
In the bolt shewn in Figures 5 and 6, which is designed to throw the bolt proper
more than an ordinary distance, h indicates an auxiliary rack which is attached to
or formed integral with the bolt casing, the pinion ƒ being arranged to engage
both with the rack teeth upon the bolt and with the rack h. It is obvious that
with this arrangement when the pinion is turned by the handle the bolt moves a
distance partly due to the engagement of the rack teeth c with the pinion f and
partly to the movement of the pinion along the rack . Slots i, i are formed in
the casing to permit the travel of the pinion and spindle. In this case as the bolt
is designed for either a right or left-handed door, I provide upon the casing two
staples y, with one of which the handle engages when in one position and with the
other when in the other position.
In the modification of my invention illustrated by Figures 7 to 12 wherein the
bolt is adapted to be operated by a knob, j indicates the said knob which is
secured to the spindle e, the latter in this case being free to slide in the pinion.
Upon the knob I form a pin or lug k, and in the boss upon the case through
which the spindle passes I form two notches or holes m, m corresponding to the
two positions of the bolt b.
The bolt is operated by pulling back the knob so as to draw the pin or lug k
out of the notch m with which it is in engagement. A spring n placed upon the
spindle e serves to normally retain the pin or lug k in one or the other of the
notches m.
In order to provide for locking the bolt, I form upon one end of the bolt proper
a staple o and upon the adjacent end of the casing I form another staple p so that
when the two staples o, p are close together a padlock can be passed through the
same, or I may arrange a small supplementary bolt, operated by a key, to engage
with the bolt proper.
If it is desired to operate the bolt from either side of the dcor I may extend

page_text: for
the spindle e therethrough and attach to the end of the extension a knob
instance, as indicated by dotted lines in Figure 3. In this case, however, it is
necessary to provide for holding the handle d in alignment with the spindle to
prevent the said handle from interfering with the movement of the bolt by the
handle q.
Means suitable for holding the handle d in this extended position may
consist of a spring arranged adjacent to the pivotted end of the said handle and
adapted to bear against a flat surface formed thereon in a manner which will be
well understood without further description.
Instead of employing a pinion I sometimes make use of a toothed segment for
operating the bolt, as shewn in Figure 13, in which case the operating handle is
advantageously formed integral with the segment.
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: :-
1. A bolt or fastening the bolt proper of which is adapted to be operated through
the medium cf a rack and pinion, substantially as described.
2. The combination with a bolt adapted to be operated by a pinion as described
of means for locking the same, substantially as described by reference to Figures 1,
2 and 3 and Figure 12 of the accompanying drawings.
3. In a bolt adapted to be operated by means of a pinion as described, the
arrangement of a fixed rack with which the said pinion engages substantially as
described with reference to Figures 5 and 6 of the accompanying drawings.
4. In a bolt adapted to be operated by a rack and pinion as described means
for operating the same through the medium of a knob, substantially as described
with reference to Figures 7 to 11 of the accompanying drawings.
5. The manufacture and use of the improved bolts hereinbefore described and
illustrated in Figures 1 to 4, Figures 5 and 6, Figures 7 to 12 and Figure 13 of
the accompanying drawings.
Dated this 23rd day of March 1892
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.