Improved Means for Locking Nuts or the like.
Year: 1899

page_text: Date of Application, 11th Nov., 1899-Accepted, 16th Dec., 1899
Improved Means for Locking Nuts or the like.
I, FREDERICK ARTHUR MURPHY, of 92, Belgrave Road, Oldham, in the County
of Lancaster, 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 relates to improved means for locking the nuts of screw bolts
or the like and whilst having for its object the provision of a neat and efficient
device for that purpose is chiefly designed to economise material and to take
up less space than most devices hitherto used for the same purpose, and with the
additional advantage over many of them that neither the bolt or nut or the threads
thereon are damaged by its use.
The invention consists essentially in the use of a short screw or plug and
threaded block in connection with the nut, the former to press the latter against
the screw threads of the bolt so as to lock the nut firmly to it.
My invention will be fully described with reference to the accompanying draw-
ings in which,
Fig. 1 is a side elevation of a nut and bolt with the improvements applied
thereto,
Fig. 2 a front elevation,
Fig. 3 a plan,
Fig. a sectional view of the nut,
Fig. 5a part sectional plan and
Figs. 6 to 12 views of details which will be readily understood from the follow-
ing description.
In these drawings, which show one way of carrying out my invention, like
parts bear the same reference letter. In one of the faces say of the nut I
form a tapped hole in which 1 insert a short setscrew or screwed plug having
preferably a fine thread which may be turned therein by any suitable means such
as by forming a nick across its outer end or a triangular hole (as shown) or other
shaped hole or projection and using a suitable appliance to fit thereinto or
thereon. From the top face e to the bottom face el of the nut 1 cut a slot or
groove, and in this I insert a die or block e, preferably about the same depth
as the nut though it may be shorter. This die has formed on its inner face, a
screw thread y corresponding in shape and contour with those on the bolt whilst
its other faces correspond with the slot in the nut. The slot therefore keeps
the die in position sideways but enables it to be pushed forward squarely onto
the threads of the bolt by the screw so as to lock the nut firmly on the latter
and prevent it turning. By slucking back the set screw the nut is released and
may be turned. It is not necessary to entirely withdraw the set screw in order
to turn the nut but the screw is preferably so arranged that when slacked back
only a little the nut is released whilst the screw is not in the way of any spanner
that may be used.
The invention is applicable to all kinds of nuts which require to be locked in

page_text: position and to other appliances of a similar character. I would also have it
understood that the nut a may be formed with a square hole at the inner end of
that in which the screw is placed instead of the slot f and in which a square
block chased with a thread on the inner face corresponding to that on the bolt
may be placed and pushed forward by the set screw as before described. Again
in place of the square block there may be a round one prevented from turning
by a pin but capable of moving forward as described. The details may be further
modified without departing from the spirit of the invention.
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
L
L
1. A locking means for screw nuts and bolts comprising a loose die or block
formed with a chased threaded face, corresponding with the threads on the bolt,
located in a slot or hole formed in the nut to be locked and a set screw for forcing
said block against the bolt substantially as described.
•
2. In a nut-lock the combination of a die or block such as c and a set screw such
as substantially as described.
.
3. The improved locking arrangement for the nuts of bolts or the like con-
structed, arranged and operating substantially in the manner described with
reference to the accompanying drawings.
The 10
1000
WILLIAM H. TAYLOR,
Stephens Buildings, 62, Market Street, Manchester,
Agent for the Applicant.
WILLIAM H. TAYLOR,
Stephens Buildings, 62, Market Street, Manchester,
Agent for the Applicant.