Improvements in Shifting Spanners.
Year: 1897

page_text: Date of Application, 30th June, 1897-Accepted, 31st July, 1897
COMPLETE SPECIFICATION.
Improvements in Shifting Spanners.
I HARRY PERCIVAL ANDERSON Mechanical Engineer residing at No. 61 Church
Lane Old Charlton S.E. 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 improvements in Shifting Spanners so as to make the
said spanners adjustable, and suitable, either, as a pipe, or ordinary nut and bolt
wrench by the application of a fork-ended lever which has for its fulcrum a movable
pin. The forked ends of the lever, terminate in arcs with holes for the movable
pin or fulcrum, to pass through, and placed so as to give the said arcs an eccentric
inotion. The drawings accompanying this Specification will make the Invention
understood.
17
"
In the drawings herewith Fig. 1 is a side elevation, Fig. 2 is a front elevation:
In Figures 1, & 2, a, is a stationary jaw which terminates in a short stem, b,
c, is a movable jaw, free to move up and down the stem, b, d, is a fork-ended lever,
the forked ends terminating in arcs of a suitable radius as shown, e, are holes down
the centre of the stem, b, the distance of the centres of these holes from one another
are less than the eccentricity given to the ares of the lever, d, f, a movable
pin passing through the lever, d, and the stem, b, forms a fulcrum for the lever to
turn on a small pin, g, is fixed at the end of the stem, b, to keep the movabila
jaw, c, from falling off; a chain, h, secures the lever, d, to the jaw, e, the movable
pin, f, is also attached to the chain; &, as shown so as to prevent any of the parts of
the spanner from falling away; the jaws, a & b, are cut as shown in Figure 1,
so as to assure a firm grip. It will be seen that as the lever, d, is moved one way
or the other, the space between the jaws is made larger, or smaller, by the eccentric
movement of the arcs as hereintofore explained, and as the distance of the centres
of the holes, c, are less than the eccentricity given to the ares of the said lever, that
the spanner will grip any sized' article within its limits, by simply placing the
pin f, in the hole suitable to the size of the article to be operated upon, as shown
in Figures 1, & 2.
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 shifting Spanner, adjustable, and suitable, either, for turning round
hexagonal, or other shaped articles, the pressure and turning movement against
the articles to be derived from a forked lever having the forked ends terminating
in arcs of a suitable radius, turning on a fulcrum so placed, so as to give the said
ares, of the said lever, an eccentric motion, by which means, the jaws of the said
spanner may be brought together with great pressure against the article to be
operated upon, substantially, and adjustable, by the shifting of the said fulcrum,

page_text: in the shape of a movable pin; the whole to be performed, and chained together,
substantially, as hereintofore described, and shown in Figures 1, & 2.
Dated th: 20th of T 1005
HARRY PERCIVAL ANDERSON,
: Applicant: