IMPROVEMENTS IN
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said John Malin at the Office
of the Commissioners of Patents on the 4th January 1883.
JOHN MALIN of Sheffield in the County of York
ADJUSTABLE SPANNERS"
"IMPROVEMENTS IN-
My invention relates to improvements in adjustable spanners, and particularly to
the spanner known as the "
'Clyburn" and refers to the method of actuating the
moveable jaw of such spanners.
In carrying out my invention I retain the general configuration of the Clyburn
Spanner, that is to say, the head with the fast jaw in combination with the handle;
and the adjustable jaw sliding within the bead. I also form an oblong hole through
the head for the adjusting movement, as in the Clyburn, but instead of a worm
rotating on a plain pin or axle, and engaging with a series of teeth formed on the
underside of the loose jaw, I use a circular nut or disc, which may be traversed
from one side of the opening to the other upon a quick threaded screw; the edge
or periphery of the circular nut engages with a slot or groove cut in the bottom
edge of the traversing jaw, and it will be obvious that on turning the Circular nut
round, it will travel along the fixed scrow and will carry the loose jaw along
with it.
As a modification of my invention instead of a fixed screw I use a screw that
will work to and fro in a correspondingly screwed hole, and in the centre of the
screw when in its place I secure a disc or roller fitting into the beforementioned
groove or slot in the loose jaw; in this case the screw and the disc travel together
with the jaw. I do not bind myself to the configuration of the "Clyburn," as my
invention may be applied to straight handled spanners, such as the one known to
the trade as the "Budding". Spanner.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
tho said John Malin in the Great Seal Patent Office on the 4th July 1883.
"IMPROVEMENTS IN
JOHN MALIN, of Sheffield in the County of York
ADJUSTABLE SPANNERS"
My Invention relates to improvements in adjustable spanners, and is particularly
applicable to the adjustable Spanner known as the "Clyburn," and it refers to the
method of actuating the moveable jaws of such spanners.
In applying my invention to a "Clyburn " Spanner, for example, I retain I retain
the general configuration, that is to say, the head with the fast jaw, in combination
with the handle, and the loose jaw sliding within the head, and in order that my
invention may be clearly understood, I shall in my description refer to the
annexed sheet of drawings, and to the letters of reference, premising that the same
letters refer to the same parts in all the figures.
"
Fig. 1, represents a Clyburn" spanner fitted with my improved means of
actuating the adjustable jaw.
Fig 2, represents the adjustable jaw, withdrawn from the spanner.
Fig. 3, the screw and the traversing circular nut or disc, (in section).
I form an oblong hole F, through the head as in the ordinary Clyburn, and fit
the shank E, of the loose jaw C, so that the lower edgo shall project into the
oblong hole, and instead of cutting a series of teeth in the loose jaw, as in the
ordinary spanner, I make a single slot D, to receive the periphery of a circular nut
or disc I which has a central hole, tapped with a screw thread, corresponding with
the thread upon the screw G, which I prefer to be a double, or quick thread, and
on which it may be traversed by the thumb and finger of the operator from end to
end of the oblong hole F, carrying with it the loose jaw C,-The small end of the
screw, marked H, serves to secure the screw in its place, as shown in Fig. 1.
As a modification of my invention, instead of the fixed screw G I use a screw
that will work to and fro, in a correspondingly screwed hole, and in the centre of
the screw I secure a disc as herein before described, so that when turned round by
the operator, the screw and the disc travel together with the loose jaw.
I do not bind myself to the configuration of the spanner, to which my invention
may be applied, as it is evident that it may be adapted to suit various shapes and
patterns of spanners.
Having now described and fully ascertained the nature of the said invention,
and the manner in which it may be carried into effect, I would observe in
conclusion that what I consider to be novel and original and therefore claim, as
the invention secured to me by the hereinbefore in part recited Letters
Patent; is:
In adjustable spanners, the combination of the circular nut or disc I with the
loose jaw C, provided with the single slot D, and the screw G, (whether fixed or
traversing) for the purpose specified, and substantially as described and illustrated,
or any mere modification thereof,
In Witness whereof I the said John Malin have hereunto set my hand and
seal this thirtieth day of June, in the year of our Lord, One thousand
sight hundred and eighty three.