Adjustable Spanner or Key for Turning and Adjusting Bolts, Nuts and Squares in, or Winding, Watches, Clocks, and other Pieces of Mechanism.
Year: 1899

page_text: Date of Application, 10th Feb., 1899
Complete Specification Left, 26th July, 1899-Accepted, 2nd Sept., 1899
PRICITA DELITICATION.
Adjustable Spanner or Key for Turning and Adjusting Bolts, Nuts
and Squares in, or Winding, Watches, Clocks, and other Pieces of
Mechanism.
I, EBENEZER GEORGE STRONG, Ark Terrace, Bath Road, Melksham, Wilts.,
Watch & Clock Maker & Jeweller, do hereby declare the nature of this invention
to be as follows:-
An adjustable spanner or key having an arrangement in the construction
thereof which automatically prevents the spanner or key from being thrown out
of its correct adjustment whilst in use, keeping the jaws of the spanner, or key,
tightly gripped to the square nut, bolt, or winding post as the case may be
so that more pressure may, if required, be brought to bear upon the turning of
winding post or any other fitting under treatment, than what can be given by
an ordinary adjustable watch or clock key or spanner.
Fig. 1, represents an ordinary adjustable watch key. The pushpiece A, con-
tinued by the rod B, is fastened to the spring ends of the jaws C. This central
fitting comprised by the parts A, B, C, is placed within the tube D. A spiral
spring E is fitted loosely around rod B, acting between the lower end of push-
piece & the stop F (the latter is as one part with the tube D) thereby drawing
the jaws C, together, & within (as far as shown) the lower end of tube D, which
is fitted to receive them. By pressing pushpiece the jaws are thrust out
ingly, from the key, & expand ready to be placed over the winding post. In
using this key, the grip of the jaws is entirely dependent upon the action of
the spiral spring E in resisting the tendency of the jaws, to draw out of key,
expand slip around the winding or other square, which actually takes place
if sufficient pressure is brought to bear in turning key.
accord-
A part of the invention is shown in Fig 2, a projecting stud-piece P being
affixed to the central fitting A, B, C, which is free to move up & down, when
required, by reason of a slot G being cut in the tube 1).
Fig. 3, shows the spanner or key at rest An outer tube H, loosely fitted
over, & reaching from, the shoulder d of tube D, terminates in a wide V shaped
cutting V, at the top, as shown in drawing. The stud piece P projects beyond the
inner diameter of tube H.
Another short tube or collar J, is tightly affixed to tube D, & a spiral spring K
is so placed with one end attached to collar J, & the other to tube H, that
it keeps the stud-piece P centrally above the cutting V, whilst the key (or
spanner) is at rest, so that the central fitting can be freely pressed down when
required.
In Fig. 4, the spanner or key being in use, to turn a square piece S, one
side of the cutting V, is brought obliquely under the stud-piece P, thereby pre-
venting the jaws of the key being drawn outwards from their socket in tube D
& slipping over the square piece S.

page_text: Figs. 3, & 4, show one side of key, the other side, can have the same action
by duplicating slot G, stud-piece P, & cutting V.
In addition to foregoing particulars the cutting in slot G could be notched
each side & the stud-piece F, so shaped as to catch in a notch when pressed by
the turning of tube H.
For large keys, or spanners they would require side-pieces or a handle of some
kind affixed to tube H, also the nozzles of jaws may be made stronger in pro-
portion & shaped inside so as to suit other shaped nuts, bolts & the like, to those
which are squared.
These improvements can be applied to other adjustable watch keys & spanners
in use which may differ in minor details of construction, though not in principle,
from the specimen shown in Fig. 1.
Adjustable Spanner or Key for Turning and Adjusting Bolts, Nuts
and Squares in, or Winding, Watches, Clocks, and other Pieces of
Mechanism.
EBENEZER GEORGE STRONG, late of Ark Terrace, Bath Road, Melksham, Wilts.,
45, Market Place, Devizes, Wilts., Watchmaker, Jeweller, etc., 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 consists of improvements in the construction of adjustable
keys or spanners, so that the jaws thereof automatically retain their correct
adjustment whilst in use.
By referring to drawings (left with Provisional Specification) the application
of these improvements to an ordinary adjustable watch or clock key is shown.
Fig 1, represents an ordinary adjustable watch or clock key.
+1
The pushpiece A continued by the rod B, is fastened to the spring-ends of
the jaws C. This central fitting A, B, C, is placed within the tube D.
ST
A spiral spring E, is fitted loosely around rod B, acting between the lower end
of pushpiece & the stop E (the latter is as one part with the tube D) thereby
drawing the jaws C, together & within (as far as shown) the lower end of tube Ď
which is fitted to receive them.
n
By pressing pushpiece the jaws are thrust out accordingly & expand ready
to be placed over the winding post.
In using this key the grip of the jaws depend upon the action of the spiral
spring E resisting the tendency of jaws to draw out of key, expand & slip around
the winding post, which will take place if sufficient pressure be given in turning
key.
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A part of the invention is show in Fig. 2. A projecting stop-piece P, being
affixed to the central fitting A, B, C, is free to move up & down when required,
a, slot G, being cut in the tube D.
Fig. 3, shows the improved key at rest. An outer tube H is loosely fitted over
& reaching from the shoulder "d" of tube D, terminates in a wide Vsliaped
cutting at the-top as shown in drawing.
The stop-piece P, projects beyond the inner diameter of tube H, & in line
with the cutting V: A short tube orc collar J, is tightly affixed to tube D&a
spiral spring K, is so placed, with one end. attached to collar J, & the other

page_text: to tube H, that it keeps the stop-piece P centrally above the cutting V whilst
the key is at rest.
In Figs. 4, the improved key is shown in use. In turning the square piece S,
one side of the cutting V is brought obliquely under the stop-piece P, thereby
preventing the jaws of the key being (by extra pressure in turning,) drawn
outwards from their socket, thrown out of their adjustment & caused to slip
over the square S.
Figs. 3 & 4 show one side of key, the other side may be given, if desired, the
same action by duplicating slot G, stop-piece P, and cutting V.
For a clock key or large spanner, a handle, or side pieces, should be affixed to
tube H also the jaws & nozzles thereof may be made stronger in proportion for
heavier work & shaped inside so as to suit other shaped nuts bolts & the
like to those which are squared.
The key as described in foregoing description & shown in drawings Figs. 3,
& 4, may be simplified by dispensing with the spiral spring K & as an alternative
make the spring E serve the purpose of centreing, by connecting, the one end
to the inside of tube H, adjoining stop, F, & the other end to the push-piece A
adjoining rod B.
If this me nod of centreing be chosen, collar J, may be dispensed with & the
tube D made considerably shorter, the latter being connected to the outer tube H,
in any way that will prevent it being pulled out & at the same time retain the
required revolving action.
If the sides of cutting V, be smoothly formed & quite straight in their per-
spective lines in elevation, it will be found that centreing action to the stop-
piece P, is not necessary for purpose of easy adjustment, but should notches be
cut in the sides of cutting & the stop-piece shaped to fit therein, one or the
other means of centreing must be employed.
If notches are made, the sides V may be made more sloping or even parallel
providing they are wide enough apart to give effect to the centreing action.
Having now particularly described & ascertained the nature of my said inven-
tion & in what manner the same is to be performed, I declare that what I
claim is:-
1. The outer revolving tube H which by clutching the central fitting A, B, C,
whilst the key or spanner is in use, prevents the jaws thereof being drawn out
of their sockets & thereby thrown out of adjustment, as described.
2. The methods of centreing the stop-piece P, by means of a separate spring K
or by the employment of spring E, as described.
0.01
1
1000