Fastenings to be Used in Lieu of Padlocks.
Year: 1886

page_text: Date of Application, 2nd Dec., 1886
Complete Left, 20th Aug., 1887.
Complete Accepted, 20th Sept., 1887.
PROVISIONAL SPECIFICATION.
Fastenings to be Used in Lieu of Padlocks.
I FREDERICK GEORGE UNDERHAY of Crawford Passage Clerkenwell in the County
of Middlesex Engineer do hereby declare the nature of this invention to be as
follows:-
This Invention has for its object fastenings to be used in lieu of padlocks.
Padlocks have the great defect that they are easily broken open by a wedge driven
in between the body of the lock and the strap. I use in place of a padlock a screw
bolt and nut and the nut has a cavity in which a small lock is provided. When the
nut is screwed up to its place this small lock is made to shoot its bolt into a recess
formed in a suitable position in the side of the screw bolt. Or sometimes I lock the
nut upon the stem of the screw bolt by means of a set screw and I arrange the lock
in the nut to shoot its locking bolt into a recess in the side of the set screw.
Dated this 2nd day of December 1886.
CARPMAEL & Co.,
Agents for the Applicant.

page_text: I, FREDERICK GEORGE UNDERHAY of Crawford Passage Clerkenwell in the County
of Middlesex 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:-
This invention has for its object fastenings to be used in lieu of padlocks.
Padlocks have the great defect that they are easily broken open by a wedge driven
in between the body of the lock and the strap. I use in place of a padlock a screw
bolt and nut and the nut has a cavity in which a small lock is provided. When the
nut is screwed up to its place this small lock is made to shoot its bolt into a recess
formed in a suitable position in the side of the screw bolt. Or sometimes I lock tho
nut upon the stem of the screw bolt by means of a set screw and I arrange the lock
in the nut to shoot its locking bolt into a recess in the side of the set screw.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a front elevation of a fastening constructed according to my invention
with the fittings used in connection with it.
Figures 2 and 3 show separately the bolt part of the fastening.
Figures 4 and 5 show separately the nut part of the fastening. The lock parts
which it contains are shown by dotted lines.
Figures 6, 7 and 8 show the lock bolt separately.
Figures 9 to 14 relate to a fastening of another form also constructed in accordance
with my invention.
Figures 9 and 10 shew separately the bolt part of this fastening.
Figures 11 and 12 show separately the nut part of the fastening.
Figures 13 and 14 shew the lock bolt.
In Figure 1 a is a plate to be fixed to one of the parts which the fastening is
required to secure say to the door post. The plate a has upon it a lug a' which is
perforated with a hole to receive the bolt part of the fastening. b is a strap to be
fixed to the other part which the fastening is required to secure, say to the door. The
strap b has an elongated opening in it through which the lug a¹ can pass.
c in figures 1, 2 and 3 is the head of the bolt part of the fastening and d is the stem
of the same.
On the stem d a screw thread d¹ is cut. d' is a recess in the stem to
receive the end of the lock bolt. The form of the head c is such that when the bolt is
in place its side bears against the strap b. e is a shoulder between the stem and the
head of the bolt part of the fastening; this shoulder when the stem d is passed

page_text: through the lug a enters a corresponding recess in the upper face of the lug and
when the fastening is secured a wedge or tool cannot be driven in between the head
and the lug. is a mark on the head c; a corresponding mark on the nut part has
to be brought to align with it before the nut part can be locked in place.
In Figures 1, 4 and 5 the nut part of the fastening is shown; there is a hole 9
through it and a screw thread is cut within the hole adapted to work with the thread d¹
on the stem d. h is a shoulder which when the nut part is screwed up to its place
enters a corresponding recess in the underside of the lug a. is a mark on the nut
to be brought into alignment with the mark fas seen in Figure 1.
The nut part of the fastening is made in two parts which are afterwards firmly joined
together so that the join is not apparent but nevertheless there is a cavity in the
substance of the nut into which a lock is fitted. k is the key hole and I the pin to
receive the key. m is the bolt of the lock and n the tumblers with their springs.
In Figures 6, 7 and 8 m² is the part of the bolt which when it is shot by the key
enters the recess d³. m³ is the part of the bolt against which the key operates and
m is the stump which passes through the gatings of the tumblers when these have
been arranged by the key. In the fastening represented by the figures 9 to 14 the
arrangement is for the most part similar and these figures are lettered to correspond
with the preceding description in so far as the letters are applicable. In this case
however the nut part of the fastening is secured upon the bolt part by screwing in
the set screw o until its end enters the recess d. The lock bolt is of different form
and it has in it a notch m. When unlocked the set screw o occupies this notch in
the bolt and it is then free to be turned but when locked the bolt is moved end wise so
as to cause it to enter the recess o' in the side of the set screw o.
The set screw
cannot then be turned to free the two parts of the fastening until the lock bolt m has
been replaced by means of the key.
These fastenings may have hardened steel pins inserted to prevent them being cut
through.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-
1. My screw bolt and nut fastening substantially as described having a lock within
the nut shooting a bolt into a recess in the stem of the bolt as herein set forth.
2. My screw bolt and nut fastening substantially as described having a set screw
passing through the nut and entering a recess in the stem of the bolt and having also
block within the nut shooting a bolt into a recess in the set screw as herein set
forth.
3. My screw bolt and nut fastening substantially as described and illustrated by the
annexed drawings.
Datal this 20th dust 1987
CARPMAEL & Co.,
Agents for the Applicant.