Improvements in Safety Bolts.
Year: 1891

page_text: Date of Application, 7th Nov., 1891
Complete Specification Left, 23rd Mar., 1892-Accepted, 23rd Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Safety Bolts.
I, WILLIAM BRENTON, of Polbathic, St. Germans, in the County of Cornwall,
Agricultural Engineer, do hereby declare the nature of this invention to be as
follows:
My invention relates to safety bolts of the kind described in the Specification of
former Letters Patent granted to me dated December 3rd 1878, No. 4938 and has
for its object to adapt the same for use upon doors opening either to the right or to
the left hand.
According to my present invention the plate with which the hook or handle of
the bolt engages is made double, that is to say, it extends right across the bolt plate
so that the hook or handle can engage with either side of the same and to permit
of locking the bolt in either position the said plate is provided with two holes.
the centre of the plate between the two holes is a notch or recess which allows the
hook of the bult to slide past the plate.
Dated the 7th day of November 1901
At
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Safety Bolts.
I, WILLIAM BRENTON, of Polbathic, St. Germans, in the County of Cornwall,
Agricultural 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
in and by the following statement:-
My invention relates to safety bolts of the kind described in the Specification of
former Letters Patent granted to me dated December 3rd 1878, No. 4938, and has
for its object to adapt the same for use upon doors opening either to the right or to
the left hand.
According to my present invention the plate with which the hook or handle of
the bolt engages is made double, that is to say, it extends right across the bolt-
plate so that the hook or handle can engage with either side of the same, and to
permit of locking the bolt in either position the said plate is provided with two
holes. At the centre of the plate between the two holes is a notch or recess which
allows the hook of the bolt to slide past the plate.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is an elevation of a bolt constructed according to my present invention ;
and,
Figure 2 is a section of the same on the line a x, Figure 1.
a indicates the bolt-plate, and b the bolt having the hook c as described in the
Specification before referred to. d is the locking-plate with which the said hook
engages, the said plate having its two sides formed symmetrically as shewn and
each provided with a hole e for the lock. f is the central notch or recess in
the plate which allows the passage of the hook over the said plate when moving
the bolt.

page_text: 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. The combination with a bolt having a hooked handle as described, of a
locking-plate each side of which is adapted to be engaged by the said hook and
which is provided with a hole for receiving a lock, and a central recess or notch
formed between the said holes, all substantially as, and for the purpose, described.
2. The manufacture and use of the improved bolt hereinbefore described and
illustrated in the accompanying drawing.
Dated the 22nd day of March 1802
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.