A New or Improved Duplex Wrench or Spanner for Axle Collets, Nuts, and the like.
Year: 1890

page_text: Date of Application, 11th Sept., 1890-Accepted, 11th Oct., 1890.
COMPLETE SPECIFICATION.
A New or Improved Duplex Wrench or Spanner for Axle Collets,
Nuts, and the like.
We ROBERT CANNING JONES, and JOHN WILLIAM CUNNINGHAM, both of
196 Blackfriars Road, in the County of Surrey, Engineers, 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 :-
Our invention relates to a new or improved duplex wrench or spanner for axle
collets, nuts, and the like, and consists of a bar or axis, having a square shape in the
centre and terminated at both ends with a handle. One half of such square part is
provided with a key way, while the other half is furnished with a square thread.
Upon the former half is fixed by means of a key, a block carrying two jaws, one on
each side, one jaw being well in front of the other; these jaws are formed integrally
with the said sliding block. Upon the latter half slides another block carrying likewise
two jaws, one on each side and one in front of the other. In this block is formed a
recess in which is located a circular nut mounted upon the said axis and turning upon
the rectangular thread abovementioned, in order to impart a to and fro motion to the
last mentioned sliding block.
The two pairs of jaws are so arranged that one pair can be fitted to larger size caps
or nuts than the other, the latter being in closer proximity than the former.
Instead of forming one half of the axis or bar with a key way, we may form therein
a series of tapped openings arranged at suitable intervals, the corresponding sliding
block being centrally perforated and likewise tapped, so as to receive a thumb screw
which would pass through the same and be secured in either of the tapped perforations
according to the distance at which the block is moved, i.e. according as the two
corresponding jaws are opened more or less.
And in order that our invention may be more fully understood, we have shown the
same in the accompanying drawings in which
Fig. 1 is a front view of our improved wrench or spanner,
Fig. 2 being a plan thereof.
Figs. 3 and 4 are respectively a central vertical section on line x. x of Fig. 1 and
an end view of the same.
The bar or axis A has as shown a rectangular shape in its central part being
furnished at each end with a handle h by means of which the wrench or spanner is
operated.
The square part of this axis is divided in two parts P. P¹ the part P being furnished
with a key way k while the part P' is furnished with a square thread.
Upon the part P¹ is mounted a circular nut n provided with perforations p p' &c.
on its outer periphery in which a spike is inserted, for the purpose of turning such nut
round. This nut n is located in the recess of the block b which is capable of sliding
This block b carries
on the part P¹, being moved to and fro thereon by the said nut.
two jaws j¹ ja one on each side, the former jaw j being in front of the jaw j³ as clearly
shown in Fig. 1. Correspondingly another sliding block 6' fixed on the part P carries
two jaws similarly arranged jj, the front jaw j forming with the jaw j¹ of the block b,
one wrench or spanner i.e. that used for nuts, while the jaw j forms with the jaw j³
the other spanner used for axle caps, collets and the like. The block b¹ is fixed as
shown in Fig. 2 by means of the key land is intended to remain a fixture, while the
circular nut n is turned and moves the sliding block b to and fro according as the
distance between the jaws j and j¹ and 2 and j³ respectively has to be increased or
decreased, according to the size of the ordinary nuts or collets to which they are to
be applied. But if such nut or collet was of unusual size, and the travel of the
block 6 was not sufficient for the jaws to grasp the same, the key / would have to be

page_text: removed and the block 6¹ pushed further off the distance required, being subsequently
fixed by the key in such position.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
The improved duplex wrench or spanner for axle collets, nuts, and the like,
arranged, constructed and operating substantially as and for the purpose described
and shown.
Dated this 11th day of September 1800.
HUGHES, SON & Co.,
38, Chancery Lane, London, W.C., Agents for the Applicants.