Year: 1894

page_text: . י
Date of Application, 8th Oct., 1894
Complete Specification Lelt, 8th July, 1895-Accepted, 17th Aug., 1895
I, FRANCIS FREDERICK GANLY of 29 Gt. John Street, West Gorton,
Manchester in the County of Lancaster, Engineor do hereby declare the nature
of this invention to be as follows:-
This improvement relates to screw nuts for screws and bolts and the object of my
invention is to dispense with a second or lock nut and to prevent the screw nut from
working loose.
To effect this improvement I make such screw nut of the following novel design :
One of the flat sides of the screw nut is drilled and taped, and fitted with a suitable
set screw, by preference with fine' thread.
I also employ a small circular die, of any suitable metal; one side of which is
provided with grooves corresponding with the pitch in the screw nut. When the
said screw nut is placed in position, the said small die is inserted' in the opening
on the side of the said screw nut and the said set screw is then firmly screwed
against the die and bolt and thus the nut is securely locked.
Dated this Eighth day of October 1894.
1, FRANCIS FREDERICK GANLY, of 29 Gt. John Street, West Gorton,
Manchester, 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 an improved means for locking screw nuts. The
object of this invention is to economise space by dispensing with a second or
lock nut for the purpose of preventing the principal nut from working loose.
I effect this object by the means hereinafter described and as illustrated in
the accompanying sheet of drawings representing my invention: In the several
views shown therein similar letters refer to similar parts.
In this invention one or more of the flat sides of a square, hexagonal, or
other form of screw nut as a Fig. 1 is drilled and tapped, and fitted with a suitable
set screw bns Fig. 2, 3 or 4, having by preference a fine thread.
1 form a circular die as e represented in Fig. 5 on the drawing, of a size that may
bo readily inserted, without screwing, into the hole c formed in the nut a for
the reception of the aforesaid set screw b. I form one side of the die e with
grooves e, corresponding with the pitch of the threads in the nut a and the
bolt d and with the same radius as the circumference of said bolt.
In order to lock the nut a when screwed on the bolt d linsert the aforesaid
die e into the hole cas in Fig. 6 with the grooves e resting in the threads d' of
the bolt d: I then insert the set screw band tighten the end b' on to the die e:
by these means the nut a is securely locked and prevented from turning until the
I Uning R1

page_text: set screw is slackened: It is not necessary to entirely withdraw the set screw
in order to turn the nut a and said set-screw may be formed so as to be flush
with the flat surface of the nut, and with either a hole as Fig. 2 or an indent
as Fig. 3 by which it may be turned, or may have a projecting head as Fig. 4
or of any preferred form.
The aforesaid die may if preferred 'be employed with a plain surface for
contact with the screw threads of, the bolt d. Fig. 6 represents a bolt with the nut a
in section and locked with a set screw whose head is flush with the outside of the
nut: Fig. 7 represents the side view of a bolt and nut with a set screw having a
hexagon head projecting beyond the flat side of the nut.
Having now particularly described and ascertained' the nature of this my said
invention and in what manner the same. is to be performed, I declare that what I
claim is
-
Ist. In square, hexagon, or other form of screw nuts, the application of a die
ase that may have grooves formed on one side thereof to correspond with the
threads in a bolt, or that may be plain, fitted against the threads of said bolt,, and
forced tightly against the bolt by means of a set screw passing through the nut,
in the manner and for the purpose substantially as herein before described.
2nd. In square, hexagon, or other form, of screw nuts, the application of a set
screw in combination with a die as e fitted into a hole that is drilled and tapped
in one or more of the flat sides of said nuts, in the manner and for the purpose
substantially as hereinbefore described.
Dated this 5th day of July 1895.
:
!
THOMAS PRESCOTT,
53 Arcade Chambers, St. Mary's Gate, Manchester,
Agent for Applicant.