ADJUSTABLE LOCKING SPANNER
Year: 1885

page_text: WILLIAM GEORGE CROSSKEY Smith & engineer, Upper Shirley, Croydon, and
JOHN CRAIGIE ROBERTSON gentleman, Prior's, Keston, Beckenhamn do hereby
declare the nature of our invention for AN ADJUSTABLE LOCKING SPANNER to be
as follows:-
An Adjustable Locking Spanner, which by its internal mechanism will (within
certain limits) firmly grip any-sized nut, whether square or polygonal, to which it
is applied, by means of mechanism put in action by the force applied to the handle
of the spanner.
The range of the adjusting capacity of cach such spanner though limited is a
wide one, and a spanner may be conveniently constructed on this principle to fit
nuts varying from a quarter of an inch to four inches square, although for the
purposes of trade two sizes or three of the spanner within that range would be
desirable for Registration.
The action of this Spanner is as follows:-
On one end of the Stock or Handle a portion of the metal is cut out about two
thirds the thickness of the Iron-through the remaining portion, which forms a kind
of web, is drilled a hole into which is fixed a stud or pin-on this pin works &
cam the thickness of which is equal to the recessed portion of the Handle―The
cam is a plain oblong shape-having a hole at each end-one being for the stud on
the Handle as before described-and the other working on another stud similarly
fixed on the moving jaw. This sliding jaw is so made with raised bearing slides-
that it fits into corresponding parts in the fixed jaw-the latter jaw fits also over the
end of the Handle and is secured by a strong rivet passing through both cheeks of
the jaws and the Handle near the recessed out end before described.-It is plain
now that the Handle being swung, as it were, on the rivet through the fixed jaw-
the small cam connected by the cam or link to the sliding jaw-will in fact act
like a fixed lever or connecting rod-and as the Handle is moved will cause the
sliding jaw to move also in the sliding groove into which it is fitted in the fixed
jaw-thus the one jaw remaining fixed-the other will move backward or forward,
as the Handle is moved one way or the other.
In order to prevent the jaws opening too wide-the limit is fixed by
1st The shape of the recess in which the connecting cam moves-the cam coming
in contact with the shoulder or solid part of the Handle.

page_text: 2nd The recessed part being formed into a curved front-which when the jaw is
opened to the fixed limit, comes up with the other edge of the connecting cam,
which is notched at the point of contact to form a stop.
In order to make the Spanner handy for using on say a number of nuts or bolts
of equal size-the large or fixed jaw has at its lower end, that is, the end which
fits over the end of the Handle-a quadrant shaped cheek or two cheeks, which are
made on the lower edge with notches like the teeth of a spurwheel-a slot is cut
through the Handle-through which are two rivets holding together two snugs
which have one tooth corresponding to the notches in the jaw cheeks-so that
when the Spanner is fixed at its required size-the snugs are pressed upwards and
the teeth fit into the notches-and the Spanner cannot then be altered until the
Snugs are pressed back far enough to clear the teeth from the notches.
This latter arrangement is made more practicable by fitting a spring on the
Handle over which the snugs work-thus making them firm and not liable to
shift either in or out of gear, unless intentionally moved. But this arrangement
is not necessary to the utility of the Spanner-which is a good, useful, shifting
Spanner without it.

page_text: We, WILLIAM GEORGE CROSSKEY Smith and Engineer, Upper Shirley Croydon
and JOHN CRAIGIE ROBERTSON Gentleman, Prior's Keston, Beckenham 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 has for its object an adjustable locking spanner which will (within
certain limits) firmly grip any sized nut whether square or polygonal to which it is
applied by means of mechanism in connection with the handle of the spanner.
The improved spanner is represented by the drawings annexed.
་
Figure 1 is a plan of the spanner, part is removed in order that the mechanism
may be more clearly seen. Figure 2 is a section on the line A A in Figure 1.
B is the handle of the spanner: it is connected by a rivet D to the cheeks of a
part E on which is one of the jaws. The handle can turn freely about the rivet D.
The handle is recessed at its fore end, and in the recess a stud I is fixed upon it.
The stud I receives a link L which also engages with another stud H fixed into
the part F on which is the other jaw of the spanner. The surfaces F1 F2 on the
part F are received between the cheeks E¹ E of the part E and are able to slide
truly and rectilinearly between these cheeks in such a manner as to increase or
decrease the distance between the faces of the jaws. The checks E' E2 at their inner
ends are formed with notches, with which a bolt K can be made to engage-This
bolt is in two parts K1 K2 connected by rivets C, C, passing through a slotted hole
in the handle B. M is a spring stop which, when in the position represented in
Figure 2 prevents the bolt receding so as to release the notches in the cheeks E¹ E,
but when this spring has been depressed the bolt can be drawn back freely, the
end of the spring being then received into a recess in the bolt, which is provided
for the purpose. When the bolt has been drawn back the handle can freely turn
around the rivet D so as to cause it to alter its position relatively to the jaws of
the spanner, and in this movement the handle carries the part F along the guides
in which it is free to move, and so alters the distance between the face of this jaw
and that of the opposite jaw upon the part E. When the desired distance has
been attained the bolt K is to be moved forward into the notches and the handle B
is thereby locked in position relatively to the jaws, and the position of the jaws.
relatively the one to the other then cannot be altered until the bolt is again with-
drawn. The form of the parts as represented causes the relative movement of the
jaws to be confined within suitable limits.
It is obvious that in place of the bolt K other locking mechanism may be
employed also the connection between the extremity of the handle B and the part F
may be varied but still being such that the movement of the hande B around the
rivet D causes a corresponding relative movement of the parts E and F,

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is
(1.) An adjustable locking spanner in which by the movement of the handle
relatively to the jaws and around a stud or centre attached to one of them the
other jaw is moved relatively to the first so as to increase or diminish the distance
between the faces of the jaws.
(2)—An adjustable locking spanner substantially as described.