Improvements in Adjustable Wrenches.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Adjustable Wrenches.
WALTER BURTON, Chemist, 71, Alfreton Road, Nottingham, do hereby declare
the nature of this invention to be as follows:--
A boxed in wrench fitted with a sliding bottom jaw which is placed above
two cams, or eccentrics. The jaw is brought into position by moving the upper
cam, & locked in that position by bringing the lower cam into contact with the
upper one.
These wrenches may be made of any size.
WALTER BURTON.
I, WALTER BURTON, Chemist, 71, Alfreton Road, Nottingham, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
This invention relates to adjustable wrenches and consists of an improved
construction of wrench comprising features of novelty hereinafter fully set forth
and illustrated in the drawings. The essential features of this invention com-
prise a fixed and a sliding jaw combined with two eccentrics or cams by which
the sliding jaw is locked in operative position. Referring to the accompany-
ing drawings:-
Figure 1 is a front elevation and Figure 2 a side elevation of a complete
adjustable wrench constructed in accordance with this invention.
Figure 3 is a front elevation of the upper portion of the wrench showing the
bottom sliding jaw and locking eccentrics in different positions from those
indicated in Figures 1 and 2. Figure 4 is a section on the line YY and Figure 5
is a section on the line XX of Figure 1.
A represents the metal body of the wrench, which may be of any suitable
shape, B a rectangular opening formed in the upper wider part thereof and C
the shaped upper jaw which as shown is of such a contour as to embrace or fit
against two contiguous faces of a nut and may be termed the fixed jaw.
Each of the two vertical sides A12 of the opening B is of a projecting
✓ shape and the sliding jaw ]) on each of its sides 123 is furnished with a
V groove to fit slidably thereover as is most clearly indicated in Figure 4.

page_text: The upper edge D¹ of the sliding jaw D is also adapted to fit two sides of a
nut.
The bottom of the sliding jaw D is furnished with a foot D or projecting
ledge which rests on the upper edge of an eccentric E or equivalent pivotted
loosely at E to the body of the wrench A and a further eccentric F or equiva-
lent is also movably pivotted at F¹ below the eccentric E and in a different
vertical plane from the latter for a purpose hereinafter appearing.
A rectangular piece G greater in width than the sliding jaw is removed
from the body of the wrench to enable the sliding jaw to be introduced into the
opening B and when the said jaw is inserted in its place in the latter the said
piece G is shrunk or otherwise fitted into the opening at the bottom and
becomes part of the body of the wrench to which part the eccentric E is ful-
crummed.
Each of the eccentrics is furnished with a toothed or milled edge F2 to give
greater frictional contact when the wrench is being practically used.
To use the wrench, the sliding jaw D is first moved up or down as the case
may be until the two jaws grasp the nut to be tightened or released.
The top eccentric E is then moved close up against the foot D* of the bottom
jaw and the lower eccentric F is moved up against and in contact with the
top eccentric E to lock the latter and the sliding jaw in position for operative
purposes.
The above operations are reversed when the wrench is to be removed from the
nut. By pivotting the two eccentrics in different vertical planes they will resist
any downward pressure on the sliding jaw in whatever relative position they
are placed in peripheral contact.
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. A wrench comprising a fixed jaw and adjustable sliding jaw and two
eccentrics or equivalents substantially as described.
2. A wrench comprising fixed and sliding jaws and two rotatable eccentrics
each fulcrummed in a different plane substantially as and for the purpose
described.
3. The improved wrench consisting of the parts constructed, arranged and
operating substantially in the manner described and illustrated in the accompany-
ing drawings.
Tatal
101 1
0 T
1000