Year: 1899

page_text: Date of Application, 16th Mar., 1899-Accepted, 22nd Apr.,
1899
We, HARRY OCTAVIUS ALLEN, Civil Engineer, and THE HOLDFAST NUT-LOCA
SYNDICATE LIMITED, both of 116, Hamilton House, Bishopsgate Street Without, in
the County of London, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer
tained in and by the following statement:
1
This invention relates to improvements in nut locks and consists in providing
a simple and inexpensive contrivance for this purpose. The said contrivance is
more particularly adapted for use with bolts and nuts employed with woodwork.
According to our invention we provide a thin metal plate or washer having a
lip or flange for engagement with the nut and with a pointed finger for engage-
ment with the woodwork to which the bolt and nut lock are applied, the construc-
tion of the said pointed finger being such that it will not only act to effectually
resist the tendency of the nut to turn in a direction to become loose on its bolt
but will likewise avoid the liability of said pointed finger's becoming disengaged
from the woodwork.
In order that our said invention may be clearly understood and readily carried
into effect we will proceed to describe the same more fully with reference to the
accompanying drawings, in which:
Figure 1 is a plan of the blank from which our improved nut lock is constructed.
Figure 2 is a plan, and Figure 3 a side edge view of the nut-lock in its finished!
condition.
Figures 4 and 5 are end views seen respectively from the left and right of
Figure 2.
Ꮳ
Figure 6 is a sectional elevation showing the nut lock applied to a bolt and nut.
A is the thin metal plate or washer, B the lip or flange and C the pointed finger.
The aforesaid blank is formed with an elongated hole a through which the
bolt passes, and the portion thereof which is to constitute the lip or flange B is
made with ears or lugs bb which are bent at right angles to the surface of the nut
lock as illustrated in Figure 2. The portion of the blank which is to serve as the
pointed finger C is provided at its extremity with a bevelled edge c the said point
being bent at right angles into the position represented in Figure 3.
On reference to Figure 6 it will be seen that when the nut lock is in use it is
placed between the surface of the woodwork and the nut with its lip B in a posi-
tion to engage with one of the flat sides of the said nut. The nut is then turned
in a direction to tighten it and when sufficiently tightened the pointed finger is
struck a sharp blow to cause its bevelled point to enter the substance of the wood-
work. By reason of the said point being bevelled as aforesaid its straight edge c¹
effectually resists the tendency of the nut to unscrew without liability of said
point being unintentionally disengaged from the woodwork.
The aforesaid elongated hole a enables the nut-lock to adjust itself laterally on
the bolt, so that in the event of the hole in the nut not being quite central, the

page_text: said lip will still be able to effectually engage with any of the flat sides thereof
notwithstanding the eccentricity of the nut.
.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
A nut lock having the elongated hole a the cars or lugs and the bevel pointed
finger C substantially as described and for the purposes specified.
.
el 1900
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicants.