Improvements in Adjustable Wrenches or Spanners.
Year: 1892

page_text: Date of Application, 13th May, 1892
Complete Specification Left, 13th Feb., 1893-Accepted, 25th Mar., 1893
PROVISIONAL SPECIFICATION..
Improvements in Adjustable Wrenches or Spanners.
I, JOHN THOMAS HUMPHREY, of 16, Junction Road, Plaistow, in the County
of Essex, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved adjustable wrench or spanner the object of
the improvements being to provide simple means for allowing the movable jaw 'to
be rapidly adjusted.
In carrying out my invention the movable jaw is adapted to slide on the handle
of the fixed jaw, serrations being provided on one side of the handle and corre-
sponding serrations being formed on one side of a projection on the movable jaw.
These serrations are preferably made in the form of ratchet teeth.
By this arrangement it will be obvious that the serrations will allow of the
movable jaw being adjusted into different positions and when adjusted it is held
in position by a suitable latch or its equivalent. Sufficient play is provided so
that, when the latch is in its open position, the serrated projection of the movable
jaw can be raised so as to allow of it being moved longitudinally relatively to
the fixed jaw.
Dated the 13th day of May 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Adjustable Wrenches or Spanners.
I JOHN THOMAS HUMPHREY, of 16, Junction Road, Plaistow, in the County
of Essex, 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 adjustable wrench or spanner, the object
of the improvements being to provide simple means for allowing the movable jaw
to be rapidly adjusted.
In carrying out my invention the movable jaw is adapted to slide on the handle
of the fixed jaw, serrations being provided on one side of the handle and corre-
sponding serrations being formed on one side of a projection on the movable jaw.
These serrations are preferably made in the form of ratchet teeth.
By this arrangement it will be obvious that the serrations will allow of the
movable jaw being adjusted onto different positions and when adjusted it is held
in position by a suitable latch or its equivalent. Sufficient play is provided so that,
when the latch is in its open position, the serrated projection of the movable jaw
can be raised so as to allow of it being moved longitudinally relatively to the
fixed jaw.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawings, in which
Figures 1 and 2 are side and edge views respectively of an adjustable spanner
constructed according to my invention.
Figure 3 is a view similar to Figure 2 illustrating the mode of adjusting the
spanner.

page_text: Figures 4 and 5 are views similar to Figures 1 and 2 respectively illustrating a
modification.
Similar letters of reference indicate corresponding parts in the several figures.
a is the fixed jaw having the handle b formed in one piece therewith and
c is the movable jaw which is formed with a hole c and slides upon the handle b.
d, d are the teeth or serrations on the handle and e, e are the corresponding teeth
formed on the part projecting from the movable jaw c. As shewn in Figures 1,
2 and 3 the teeth d, are formed on one side of the handle b and the corresponding
teeth e, e on the adjacent face of the part fin such a manner that when the said
part is in close contact with the handle the teeth will be in engagement to
prevent the movable jaw c from moving away from the fixed jaw a.
y is a latch
or catch which I employ for holding the two sets of teeth in engagement. When it
is desired to move the jaw c relatively with the fixed jaw a the catch g is moved from
the position shewn in full lines in Figure 1 to the position indicated by the dotted
lines and then the projecting portion f is moved away from the handle 6 as shewn
in Figure 3 so that the teeth d and e are disengaged; the said jaw can then be
moved as desired.
In the modification of my invention shewn in Figures 4 and 5 the teeth d, d are
formed upon the edge of a projecting block upon the handle b and the projecting
portion of the movable jaw c is made longer than shewn in Figures 1 to 3 so that
it can be gripped by the hand and forms part of the handle, the said party having
the teeth e, e formed on the edge of its rear end adjacent to the block so that the
two sets of teeth d, d and e, e can engage. The adjustment of the movable jaw is
effected by moving the part f as indicated by dotted lines in Figure 4 to move the
two sets of teeth out of engagement. A spring i fixed to the handle band bearing
with its free end against one edge of the part f serves to retain the two sets of
teeth normally in engagement.
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 :-
The manufacture and use of the improved spanners herein before described
and illustrated in Figures 1, 2 and 3 and Figures 4 and 5 of the accompanying
drawings.
1 1
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.