An Improved Wrench or Spanner.
Year: 1890

page_text: Date of Application, 3rd Nov., 1890
Complete Specification Left, 17th Dec., 1890-Accepted, 17th Jan., 1891
PROVISIONAL SPECIFICATION.
An Improved Wrench or Spanner.
I, PETER MITCHELL, of Greatham Terrace, West Hartlepool, in the County of
Durham, Assistant Manager of Ship Yard and Graving Docks, do hereby declare
the nature of this invention to be as follows:-
My invention relates to an improved wrench or spanner which is specially designed
for use in confined situations.
In carrying out my invention I provide a box or socket adapted to fit a nut of
any desired size and shape. The exterior of this box is circular and has around its
upper part (which is preferably of smaller diameter than the other part) a ring in
which the box is free to turn. On this ring is a lug to which is pivotted a lever
having formed upon it a key or tongue designed to engage with a series of slots
formed on the portion of the box of larger diameter.
Dated the 3rd day of November 1890.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Wrench or Spanner.
I, PETER MITCHELL, of Greatham Terrace, West Hartlepool, in the County of
Durham, Assistant Manager of Ship Yard and Graving Docks, 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 relates to an improved wrench or spanner which is especially designed
for use in confined situations.
In carrying out my invention, I provide a box or socket adapted to fit a nut of
any desired size and shape. The exterior of this box is circular and has around its
upper part (which is preferably of smaller diameter than the other part) a ring, in
which the box is free to turn. On this ring is a lug to which is pivotted a lever
having formed upon it a key or tongue designed to engage with a series of slots
formed on the portion of the box of larger diameter.
To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawing, in which :-
Figure 1 is a side elevation of my improved wrench or spanner :
Figure 2 is a plan:
Figure 3 is an underside view; and,
Figure 4 a section on the line za Figure 2.
a indicates the box or socket provided with an opening which, as shown, is of
hexagonal shape but which may be of any other desired form and of a size corre-
sponding to that of the nuts which it is designed to fit, the upper part c of the said
box being of smaller diameter than the lower part d.
e is the ring surrounding the part e and held in position by means of the washer f
secured to the top of the said part c; g is the lug formed upon this ring, and is the
lever pivotted thereto and having a tongue i designed to engage with the slots j, j
formed around the part d of larger diameter.
With this construction it will be obvious that when the lever is in the position
shewn in full lines in Figure 4, with the tongue i in one of the slots ; the box a can
be rotated by the said lever, and that, when the lever is raised to the position indicated
by the dotted lines in Figure 4, the said lever can be moved around, for instance to

page_text: the position indicated by the dotted lines in Figure 2, so as to engage with another
slot j.
The great advantage of my improved spanner is that it can be operated in a
'very confined space, it only being necessary to move the lever the distance between
any two slots j in order to obtain a fresh hold and that a nut can be screwed up or
unscrewed without removing the spanner therefrom.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A wrench or spanner comprising a box or socket designed to receive the nut to
be turned and a lever pivotted to a ring on one part of the said socket, and provided
with a tongue adapted to engage with slots on the other part of the said socket,
substantially as described.
2. The manufacture and use of the improved wrench or spanner hereinbefore
described and illustrated in the accompanying drawing.
Dated the 17th day of December 1890.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.