Improvements in Spanners.
Year: 1897

page_text: Date of Application, 6th Aug., 1897--Accepted, 11th Sept.,
1897
COMPLETE SPECIFICATION.
Improvements in Spanners.
I, JOHN THOMAS PETFORD of the Standard Bedstead Works, School Brow,
Warrington, in the County of Lancaster, Manager, do hereby declare the nature
of this invention, and in what manner the same is to be performed, to Je
particularly described and ascertained in and by the following statement:-
The new or improved spanner which is the subject of the present invention
and which is illustrated by the accompanying drawings, has been designed with
the special object of providing a portable implement by means of which all the
various nuts and screw heads of a bicycle may be turned, and of avoiding the
objections to the use of spanners with adjustable jaws. The spanner may how-
ever obviously be used for other machines and appliances wherein screws of
various sizes are used, and for general work.
The spanner consists of two separate parts, i.e. the head A, shewn in plan and
side elevation by Figure 1, and the handle B, also shewn in plan and side
elevation by Figure 2.
The head A, may consist of a metallic disc, in the periphery of which the
recesses 1 2 3 4 5 6 7 are cut or produced. Each of these recesses is shaped to fit
upon the head or nut of a screw and they may be arranged to fit successively
larger heads and nuts or otherwise as may be convenient. As illustrated, the
spanner is designed to fit the heads and nuts of screws advancing by sixteenths
of an inch from one sixteenth to half an inch diameter with the omission of the
seven sixteenth size, but any other sizes or series of sizes may be adopted.
Nearer the centre of the disc there are a plurality of equidistant holes C C, the
function of which will be hereinafter described.
The handle B may be of any convenient shape and has formed or fixed near one
end, the (preferably) two pins D which have such a diameter, length and
pitch that they can be fitted accurately into any pair of the holes C C.
In use, the appropriate recess having been fitted upon the screw nut or head,
the handle pins are fitted into a suitable pair of the holes when the nut cr
head can be rotated as by an ordinary spanner.
Instead of the two parts being engaged by pins on the handle fitting into the
holes in the disc, this arrangement may be reversed, that is to say holes in the
handle may fit upon pins in the disc; and, in substitution for the pins and holes
other known equivalent devices for temporarily engaging the handle with the
disc may be employed.
It will be seen that the spanner constructed as hereinbefore described can,
when its parts are separated, he conveniently carried in the pocket. Other
appliances and devices may be combined with it if desired. For example, one
end of the handle may be shaped to form a screw driver; an additional pair of
pins may be fitted upon the handle to turn some special nut or part other than the
head A or the handle may be pierced with a hole shaped to fit a special size or
shape of screw head or nut, as also may the centre and other parts of the head.

page_text: 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 new or improved spanner constructed and arranged substantially as
herein before described with reference to the accompanying drawings.
2. A new
or improved spanner comprising a disc or head with a series of
peripheral recesses adapted to fit upon screw heads and nuts and with means
whereby the disc may be turned, together with a separate handle capable of being
engaged with the disc for turning it and of being thereafter disengaged
therefrom; constructed substantially as hereinbefore described with reference
to the accompanying drawings.
Dated this 5th day of August A
1907