Improvements in Wrenches.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Wrenches.
I, JOZUA CORNELIS HENDRIKUS VAN DUYL, of Kralingsche-Veer, near Rotter-
dam, in the Kingdom of the Netherlands, Engineer, do hereby declare the nature
of this invention to be as follows:-
This invention relates to wrenches and has for its object to so construct wrenches
that the edges of the upper and lower jaws shall not wear off and so that the
movable upper jaw of the wrench cannot bend backward nor break off, as is often
the case in wrenches of the well known construction when more than usual work
is required of them, or, if they do not break off, the upper jaw will slip off the nut
and bend out of shape, so that the wrench becomes useless.
According to the present improvements, the upper jaw of the wrench is
strengthened by providing the wrench with a back-part or bridge against which
the upper jaw bears in its different positions. The upper jaw is, moreover, guided
in a groove of the said bridge or support, so that the wrench cannot slip off if
used vertically above the nut.
The upper jaw with its sliding bar moves in the usual well known manner in
a slot or aperture in the body of the wrench, and is actuated by means of a nut
located in the said slot or aperture. In order to prevent bending back of the
upper jaw, the body of the wrench is lengthened behind the upper jaw up to the
top of this jaw when in its highest position and suitably strengthened, thus
forming a bridge against which the upper jaw bears in its different positions.
In moving the upper jaw, it slides tightly over the face of the bridge. This
face is provided with a curved or square groove in which a correspondingly
shaped ridge at the back of the upper jaw slides.
By this arrangement, the wrench is prevented from turning or slipping off the
nut, when it is used vertically above it. As the upper jaw is thus guided in the
bridge, the sliding-bar cannot bend, nor the wrench slip off so easily as heretofore,
and the edges of both jaws will always remain sharp."
1900

page_text: 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 adjustable spanners or wrenches and has for its object
to so construct wrenches that the edges of the upper and lower jaws shall not
unduly wear and so that the movable upper jaw of the wrench cannot bend either
backwards or sidewise nor break off, as is often the case in wrenches of the well-
known construction when more than usual work is required of them, or, if in the
wrenches last mentioned it does not break off, the upper jaw will slip off the nut
and bend out of shape, so that the wrench becomes aseless.
According to the present improvements, the upper jaw of the wrench is
strengthened by providing the wrench with a back-piece or bridge against which
the upper jaw bears in its different positions. The upper jaw is, moreover, guided
in a groove in the said bridge or support, so that the wrench cannot slip off if
used vertically above the nut.
In the accompanying drawing,
Figure 1 is a front elevation,
Figure 1* a plan.
Figure 1 a transverse section on the line I-II Figure 1, and
Figures 2 and 3 side elevations, looking from the left and right-hand side
respectively of Figure 1, showing my improved wrench.
Like letters indicate corresponding parts throughout the drawing.
Referring to the drawing, the upper jaw A with its sliding bar B moves in the
usual well-known manner in a slot or aperture C in the body D of the wrench
and is actuated by means of a nut E located in a seat or aperture F, the lower
part B of the flat slide-bar B being provided with screw-threads at its edges. In
order to prevent bending back of the upper jaw A, the body of the wrench is
extended as at G behind the said upper jaw A up to the top of this jaw when in
its highest position, and is suitably strengthened, as at H, thus forming a bridge
against which the upper jaw bears in its different positions.
As the upper jaw A moves, it slides closely over the face of the bridge G. This
face is provided with a curved or square groove 6 in which a correspondingly
shaped rib or ridge c at the back of the upper jaw A slides. By this arrangement
the bar B is prevented from bending and the wrench from turning or slipping
off the nut, when it is used vertically above it. As the upper jaw is thus guided
in the bridge, the sliding-bar B cannot bend, nor the wrench slip off so easily as
heretofore and the edges of both jaws will always remain sharp.
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:-
The improved adjustable spanner or wrench constructed substantially as
described with reference to the accompanying drawing and for the purposes above
specified.
Dated the 16th dose
D. YOUNG & Co.,
11 and 12 Southampton Buildings, London, W.C.,
Agents for the Applicant.