Locking the Nuts Pertaining to Screwed Bolts or Screws.
Year: 1888

page_text: Date of Application, 17th Oct., 1888
Complete Specification Left, 16th July, 1889-Accepted, 7th Sept., 1889
PROVISIONAL SPECIFICATION.
Locking the Nuts Pertaining to Screwed Bolts or Screws.
ARTHUR TREADWIN TUCKER, 23 Cranbourn Street London, W.C. Lock and Safe,
maker, do hereby declare the nature of this invention to be as follows:-
The principal objects I have in this Invention are, first, to prevent the nuts of bolts
or screws revolving and becoming loose, secondly to prevents the nuts &c. being bound
by the overscrewing or tightening of the securing nut and thirdly to obtain a perfect
adjustment in locking nuts-This I effect by means of a washer placed over the first
or adjusting nut, after the said nut is screwed up to the requisite distance, having
projecting prongs on the sides or ends, in such a way as to enter in and upon the said
first nut through grooves placed therein for their reception. The second or securing
nut may on account of this locking washer, be screwed up to the utmost tension
without in any way affecting or over binding the article upon which it is placed.
Dated this 15th day of October 1888.
ARTHUR TREADWIN TUCKER.
COMPLETE SPECIFICATION.
Locking the Nuts Pertaining to Screwed Bolts or Screws.
ARTHUR TREADWIN TUCKER Lock Manufacturer 23 Cranbourn Street London W.C.
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 consists of an improvement in the method of locking the nuts of Bolts,
Screws &c., more especially those used in fastening the parts of machinery &
engineering and other work where the utmost tension is required, without binding, to
their detriment, the parts involved; and the purpose of my invention is to prevent the
binding of the parts secured by Lock-nuts-To this end I cause a Washer or Holder,
made with pronged or forked ends or nibs to be inserted in or over the first nut after
the said nut bas been screwed up to the desired extent; the prongs or nibs entering
into slots specially prepared in the first or adjusting nut, to receive them, and, into
corresponding slots in the part to which it is required to be attached; The second or
securing nut can then be screwed up to the highest tension without allowing the first
nut to revolve and so decrease the distance between the head of the Bolt and the nut,
or, in other words, without allowing it to bind as in the case of other Bolts & nuts for
locking purposes heretofore made & constructed without my improvements being
therein contained.
This Invention also applies to the handles for doors of Railway Carriages, Broughams
and all other carriages or vehicles as shown in Fig. 2. of Drawings sent.
Fig. 1 in the accompanying Sheet of drawings represents a Bolt fitted with my
Lock-nut A is the Bolt-B the washer or Holder C the adjusting nut D the locking
nut E section of plates, F space between plates if necessary.
Fig. 2. represents a Door handle, fitted as hereinbefore described. A the spindle
B-the handle C-washer or holder D adjusting nut E locking nut.
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, not

page_text: alone the precise mode & construction of the Washer or Holder but also its use and
application to Lock-nuts and screws to prevent the binding of all articles fixed or
held together by Lock-nuts &c. for purposes hereinbefore detailed.
Dated this 16th day of July 1889.
ARTHUR TREADWIN TUCKER.