IMPROVEMENTS IN THE METHOD OF LOCKING THE NUTS ON SCREW BOLTS FOR RAILWAY FISH PLATES AND OTHER PURPOSES to be as follows:
Year: 1884

page_text: I, EDWARD BRASIER of Bastable House New Cross in the County of Surrey
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
THE METHOD OF LOCKING THE NUTS ON SCREW BOLTS FOR RAILWAY FISH PLATES
AND OTHER PURPOSES to be as follows:-
"
In carrying my invention into practice I form a recess (advantageously conical)
in the screwed end of a railway fish plate or other boit and when the nut is
screwed up into position a punch is applied to the hollow in the end of the bolt
and struck with a hammer so as to expand the screwed end of the bolt thereby
securely locking the nut thereon. The nut can only be removed by means of a
powerful spanner which contracts the end of the bolt to its original form
without destroying the screw thread. The bolts and nuts can be used over
and over again.
The hollow or recess in the end of the screw bolt can be made in the process of
manufacture or the stock of existing bolts may be readily altered by simply drilling
a hole in the screwed end.
TONGUE & BIRKBECK,
34, Southampton Buildings,
Agents for the Applicant..

page_text: I EDWARD BRASIER of Bastable House New Cross in the County of Surrey
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
THE METHOD OF LOCKING THE NUTS ON SCREW BOLTS FOR RAILWAY FISH-PLATES
AND OTHER PURPOSES and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement:-
"
In carrying my invention into practice I form a recess (advantageously conical)
in the screwed end of a railway fish-plate bolt or other bolt a as shown at a³
Figure 1 of the drawings hereto annexed which shows a separate view of a
railway bolt a formed with a conical recess a¹ in accordance with my invention.
When the nut a² is screwed up into position as shown in Figure 2 (which shows
a railway rail b and fish plate c combined and secured together by the bolt a) the
nose of a punch such as d Figure 3 is then applied to the hollow or recess a¹
in the end of the bolt and struck with a hammer so as to expand the screwed
end of the bolt a (as represented in Figure 2) thereby securely locking the nut a³
thereon.
The nut a can only be removed by means of a powerful spanner which by
unscrewing the nut a² causes the end of the bolt a to contract to its original form
without destroying the screw thread by this means the bolts and nuts can be used
over and over again.
The hollow or recess a¹ in the end of the screw bolt a can be made in the
process of manufacture or the stock of, bolts already made may be readily
altered by simply drilling a hole in the screwed end of each bolt.
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 I make
no claim to any of the parts separately which are well known and in common use
but what I claim is
The improved method of locking the screw nut on the screw bolts of railway
fish-plates and on screw bolts used for other purposes by forming a hole or recess
in the end of the bolt and expanding the same substantially in the manner and for
the purpose herein before described.
TONGUE & BIRKBECK,
34, Southampton Buildings,
Agents for the Patentee.