AN IMPROVED SAFETY BOLT OR LOCK PIN
Year: 1878

page_text: LETTERS PATENT to William Brenton, of Polbathic, St. Germans, in the
County of Cornwall, Agricultural Implement Maker, for the Invention of
"AN IMPROVED SAFETY BOLT OR LOCK PIN."
Sealed the 4th April 1879, and dated the 3rd December 1878.
PROVISIONAL SPECIFICATION left by the said William Brenton at the
Office of the Commissioners of Patents on the 3rd December 1878.
WILLIAM BRENTON, of Polbathic, St. Germans, in the County of Cornwall, Agri-
cultural Implement Maker. "AN IMPROVED SAFETY BOLT OR LOCK PIN."
This Invention consists in the construction of a simple, strong, and efficient
safety bolt, specially applicable for stable and cattle house doors, railway gates, and
also for securing dwelling house doors on the inside, also serving as a lock pin for
various other purposes.
In carrying out my Invention I employ a rod or bolt moving in staples or eyes
on a plate as hitherto, but the out staple is elongated downwards, and provided
with an additional eye underneath the eye in which the bolt moves, and thus forms
an eccentric to the bolt. The outer or handle end of the bolt is turned up at right
angles and formed into a hook.
By this construction if the bolt is in its opened position, and the end thereof in
its vertical or raised position, the bolt can be moved forward, so that the free end
thereof will pass into the staple on the door post or frame; then by rotating the
bolt the hooked end thereof will pass over the hereinbefore described elongated or
eccentric staple, and the bolt will be secured from moving laterally, and a pivotted.
thumb catch is provided, by turning which the handle end of the bolt is prevented

page_text: from rotating. Further, if necessary to lock the bolt a padlock is passed through
the lower eye of the eccentric staple, whereby the safety bolt serves in addition the
purposes of the ordinary padlock-hasp and staple.
To open the bolt the action is the reverse of that hereinbefore described, a suit-
able stop being provided to limit the play of the bolt and prevent it being drawn
out of the staples.
This construction of bolt also serves as a lock pin for various purposes, such, for
instance, as for securing the pieces of corrugated iron forming rick coverings, and
for other uses where bolts and lock pins are required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Brenton in the Great Seal Patent Office on the 30th May
1879.
WILLIAM BRENTON, of Polbathic, St. Germans, in the County of Cornwall, Agri-
cultural Implement Maker. AN IMPROVED SAFETY BOLT OR LOCK PIN."
"
This Invention consists in the construction of a simple, strong, and efficient
safety bolt, specially applicable for stable and cattle house doors, railway gates, and
also for securing dwelling house doors on the inside, also serving as a lock pin for
various other purposes.
In carrying out my Invention I employ a rod or bolt moving in staples or eyes
on a plate as hitherto, but the outer staple is elongated downwards, and provided
with an additional eye underneath the eye in which the bolt moves, and thus forms
an eccentric to the bolt. The outer or handle end of the bolt is turned up at right
angles and formed into a hook.
By this construction if the bolt is in its opened position and the end thereof in
its vertical or raised position the bolt can be moved forward, so that the free end
thereof will pass into the staple on the door post or frame; then by rotating the
bolt the hooked end thereof will pass over the hereinbefore described elongated or
eccentric staple, and the bolt will be secured from moving laterally, and a pivotted
stop or catch is provided, by turning which the handle end of the bolt is prevented
from rotating.
Further, if necessary to lock the bolt a padlock is passed through the lower eye
of the eccentric staple, whereby the safety bolt serves in addition the purposes of the
ordinary padlock-hasp and staple.
To open the bolt the action is the reverse of that hereinbefore described, a suit-
able stop being provided to limit the play of the bolt, and prevent it being drawn
out of the staples.
This construction of bolt also serves as a lock pin for various purposes, such, for
instance, as for securing the pieces of corrugated iron forming rick coverings, and
for other uses where bolts and lock pins are required.
But to make my Invention better understood I will proceed to describe the same
by reference to the accompanying Drawings, in which Figure 1, Sheet 1, is an
elevation of my improved safety bolt open; Figures 2 and 3, Sheet 1, end views of
same; Figure 4, Sheet 1, elevation shewing the bolt raised and moved forward;
Figure 5, Sheet 1, end view of same; Figure 6, Sheet 1, elevation shewing the
hooked end of the bolt turned down over the eccentric staple; Figure 7, Sheet 1,
end view of the same; Figure 8, Sheet 1, elevation shewing the bolt secured by
the stop or catch; Figure 9, Sheet 1, end view of same; Figure 10, Sheet 1, eleva-
tion shewing the bolt secured by a padlock; Figure 11, Sheet 1, end view of same;
Figure 12, Sheet 1, detached view of the eccentric staple; Figures 13 and 14,
Sheet 2, plans shewing my improved safety bolt or lock pin arranged as a sash
fastener; and Figures 15 and 16 elevations shewing the bolt applied to fasten the
door of a railway truck. Similar letters of reference are used to represent similar
parts.
I will first describe the Invention by reference to Sheet 1 of the Drawings.
a is the rod or bolt; b, b', the eyes or staples on the plate c, secured to the door A
in the usual manner; d is the staple on the door jamb B. It will be seen that the
outer staple b has two eyes e and f, the bolt a moving in the eye e, the staple b
thus forming an eccentric to the bolt a; g is the hooked end of the bolt; h is the
pivotted stop or catch; i is the usual stop for limiting the play of the bolt.
The bolt being in the position shewn in Figures 1, 2, and 3 is closed as follows,
videlicet ---By first rotating the bolt so as to move the hooked end thereof into the
vertical position, as shewn by the dotted lines in Figures 1 and 3, and the bolt is
then moved forward into the position shewn in Figures 4 and 5; the bolt is then
turned down, and the hook g thereof will pass over the eccentric staple b, as shewn

page_text: in Figures 6 and 7, and the bolt will be prevented from moving laterally. The
stop or catch h is now turned into the horizontal position, as shewn in Figures 8
and 9, and the bolt will be securely fixed and prevented from rotating. In
Figures 10 and 11 the bolt is shewn secured by a padlock C passed through the
lower eye f of the eccentric staple b. It will be seen by reference to Figure 1 that
the stop also serves to keep the bolt from being accidentally shot or shaken out
of its open position.
To open the bolt the action will be the reverse of that herein before described.
In carrying out my Invention as applied to a sash fastener I form the end of the
rod or bolt a with a projection or book j, as shewn in Figures 13 and 14, Sheet 2,
which shew respectively a plan of the sash fastener opened and closed. The bolt
being moved forward the end thereof will pass into the staple or box d, the front
of which is formed inclined or taper, as shewn by the dotted lines, so that when
the bolt a is turned into the position shewn in Figure 14 the hook j acting on the
inclined surface of the staple or box d will draw together the two meeting rails D
and E of the sashes. If desired a set screw or other suitable arrangement may be
applied to the fastening so as to hold the bolt in its closed position. Instead of
the front of the staple d being tapered the same effect would be produced by
tapering the staple b, as shewn by the dotted lines.
In Figures 15 and 16, Sheet 2, I shew the arrangement for bolts or fastening
for the hinged doors of railway trucks. For this purpose I prefer to place the
staple or guide bat an incline, by which arrangement the mere turning of the
bolt a will draw the bolt from the staple d. by the inclined staple b acting in the
hooked end g of the bolt. The free end of the bolt may be tapered and should fit
nearly tight in the staple or eye d, whereby the door will be closed tight. A suit-
able spring catch may be employed to keep the handle in its raised position if
required.
I
Having thus described my Invention and the manner of performing the same,
wish it to be understood that I do not confine myself to the precise details herein
laid down and shewn in the Drawings, as the same may be varied without departing
from the peculiar character of my Invention, but what I claim is,-
Firstly. The improved safety bolt or lock pin, constructed and operating
substantially as hereinbefore described, and represented in the accompanying
Drawings.
Secondly. I claim a bolt having a hooked end in combination with an eccentric
staple, as and for the purpose hereinbefore described.
Thirdly. In a bolt constructed as hereinbefore described I claim a pivotted stop
or catch for preventing the rotation of the bolt, as herein before described.
Fourthly. I claim the eccentric staple 6 having a lower eye or opening for
receiving a padlock, as and for the purposes herein before described.
Fifthly. I claim the book or projection j in combination with the inclined por-
tion of the staple d, as and for the purposes hereinbefore described, and shewn in
Figures 13 and 14, Sheet 2 of the Drawings, or any mere modification thereof.
Sixthly. I claim the placing the staple or guide b at an angle, as and for the
purpose described, and shewn in Figures 15 and 16, Sheet 2, of the accompanying
Drawings.
In witness whereof, I, the said William Brenton, have hereto set my hand
and seal, this Twenty eighth day of May, in the year of our Lord One
thousand eight hundred and seventy nine.