Improvements in or relating to Coach and like Spanners or Wrenches.
Year: 1897

page_text: Date of Application, 8th May, 1897
Complete Specification Left, 8th Feb., 1898-Accepted, 8th June, 1898
PROVISIONAL SPECIFICATION.
Improvements in or relating to Coach and like Spanners or Wrenches.
I, HUGH REID GRIFFIN, of 36, Worship Street, Finsbury, in the City of London,
Engineer, do hereby declare the nature of this invention, which has been com-
municated to me from abroad by The Eccentric Wrench Company, of 11, Pine
Street, New York, United States of America, to be as follows:-
The object of this invention is to construct coach and like spanners or wrenches
in such manner that by an eccentric rotative action given to a grip nut of the
movable jaw, which nut can be caused to engage the thread or rack on the stem
of the fixed jaw, an instant bite or lock of one to the other can be ensured, the
threaded nut being turned by hand to shift the movable jaw to ensure a tight fit
when the jaws require finer adjustment. An instant release of the two parts is
obtained by a reverse motion of the nut for the adjustment of the movable jaw
which then is free to be slid up or down the stem to suit the nut or the head of a
bolt which has to be turned.
The movable jaw is provided with a spring actioned pivot pin to engage in, or
the rotative eccentric may have such a pivot pin to engage in holes for temporarily
holding the rotative nut in a closed position, thus preventing accidental release
of the movable jaw, or a spring or springs may be applied to any part of the mov-
able jaw to lock the eccentric when the threaded nut is in a closed position and so
prevent the jaw being released accidentally or during use.
For the purpose of this invention, the sleeve of the movable jaw is slotted in
the face between the jaw proper and the lower band, and in this slot a threaded
nut is inserted and held in place by a pin which is either made with a portion
eccentric or is encircled by an eccentric in part of its length, the upper end of this
pin (plain or screw threaded) is passed up through the lower band and lodged in
the body of the movable jaw, the projecting lower end of the pin or the eccentric
encircling the pin having a thumb head or a short lever affixed by which it can
be turned to engage the screw threaded nut with the teeth of the metal shank.
If a thumb head or lever handle be fitted to the eccentric pin an annular groove
is formed in it for the location of a set screw to hold it in place, a recess being
formed in one edge of the annular groove for engagement with the set screw under
action of the spring to lock the jaw in position.
By the turning of the eccentric pin, or of the eccentric surrounding the pin in
the nut, the nut is forced toward and in touch for its threads or teeth to engage
with the teeth on the face of stem of the fixed jaw to lock one to the other, and if
a finer adjustment be required the threaded nut can be turned by hand to ensure
same but which nut when turned or moved out of gear with the stem permits of
the sleeve and movable jaw being adjusted to suit requirements.
The employment of a spring or springs, or spring locking device to lock the
eccentric when the threaded nut is in engagement with the shank is an important

page_text: feature of this invention, as its use ensures a perfect working wrench or spanner
without possibility of slip of the movable jaw when in use.
Doted this 8th low of Wow 1907
A
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said-Hugh Reid Griffin.
Improvements in or relating to Coach and like Spanners or Wrenches.
I, HUGH REID GRIFFIN, of 36, Worship Street, Finsbury, in the City of London,
Engineer, do hereby declare the nature of this invention, which has been "com-
municated to me from abroad by The Eccentric Wrench Company, of 11, Pine
Street, New York, United States of America, and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement:-
The object of this invention is to construct coach, engineers, and like spanners
or wrenches in such manner that by an eccentric rotative action given to a grip
nut of the movable jaw, which nut can be caused to engage the thread or rack on
the stock or stem of the fixed jaw, an instant bite or lock of one to the other can be
ensured, the threaded or rack nut being turned by hand. An instant release of
the two parts is obtained by a reverse motion of the nut, the movable jaw being
then free to be slid up or down the stock to suit the nut or the head of a bolt which
has to be turned.'
The movable jaw is provided with a spring actioned pin or pins, or its equivalent
to engage in, or the rotative eccentric may have such a pivot pin 'to engage in
holes for temporarily holding the rotative nut in a closed position, thus preventing
accidental release of the movable jaw; or a spring or springs may be applied to
any part of the movable jaw to lock the eccentric when the threaded nut is in a
closed position and so prevent the jaw being released accidentally or during use.
The invention is clearly shown on the annexed drawings, Sheets 1 and 2, Figure 1
side elevation and Figure 2 part sectional view of a spanner in which the eccen-
tric motioned locking and releasing nut in the slot of the movable jaw is capable
of operation by a thumb head of a pin in same.
Figures 3 and 4 similar views of a spanner in which the eccentric motioned
locking and releasing nut is actuated by hand, said nut having a limiting pin
with spring, the nuts eccentricity being clearly indicated at Figure 5.
--Figure-6-part sectional elevation of a spanner in which the eccentric motioned
nut is operable by a milled band.
Figure 7 represents in section' the eccentric motioned nut as a kind of sleeve on
an eccentric boss as a base and with a boss above to each of which a strong spring
is attached, or has a bearing for keeping the bosses apart and in contact with
the movable jaw.
:
The sleeve of the movable jaw A is slotted in the face between the jaw proper
B and the lower band C, and in this slot an exteriorly threaded nut D is inserted
and held in place by a pin E which is either made with a portion eccentric F, or
is encircled by an eccentric in part of its length, this pin (plain or screw threaded)
is passed up through the lower band C and lodged in the body of the movable
jaw B, the projecting lower end of the pin E, or the eccentric encircling the pin
having a thumb head or a short lever G affixed by which it can be turned to engage
the screw threaded nut D with the teeth H of the metal shank or stock I of the
fixed jaw J, the other end K of said stock serves as the handle.

page_text: If a thumb head or lever handle G be fitted to the eccentric pin E an annular
groove L is formed in it for the location of a set screw M to hold it in place, a
recess N being formed in one edge of the annular groove for engagement with
the set screw under action of the spring to lock the jaw B in position.
By turning the eccentric pin E, F, or the eccentric P, Figures 3, 4, 5, and 6, sur-
rounding the pin E in the nut D, the nut is forced toward and in touch for its
threads or teeth to engage with the teeth H on the face of stem I of the fixed jaw J
to lock one to the other, and if a finer adjustment be required the threaded nut D
can be turned by hand to ensure same but which nut D when turned or moved out
of gear with the stem permits of the sleeve A and movable jaw B being adjusted
to suit requirements.
A spring or springs, or spring locking device Q to lock the eccentric or the
threaded nut when the threaded nut is in engagement with the shank teeth, is an
important feature of this invention, as its use ensures a perfect working wrench
or spanner without possibility of slip of the movable jaw B when in use.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what I
claim is:-
1. In a movable jaw wrench, the movable jaw B, adjusting screw 1), plain pin E,
eccentric F with its thumb piece G operating and constructed substantially as
described.
2. In a movable jaw wrench, the adjusting screw D, the eccentric F, thumb
piece G, spring locking device Q operating and constructed substantially as
described.
The oth day of February 1890.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Hugh Reid Griffin.