IMPROVEMENTS IN THE CONSTRUCTION OF GRAPNELS
Year: 1882

page_text: LETTERS PATENT to George Edward Vaughan, of 67 Chancery Lane, in the
County of Middlesex, Patent Agent, for an Invention of "IMPROVEMENTS IN
THE CONSTRUCTION OF GRAPNELS." Communicated to him from abroad by
Samuel Trott and Herbert Kingsford, both of the City of Halifax, in the
PROVISIONAL SPECIFICATION left by the said George Edward Vaughan
at the Office of the Commissioners of Patents on the 4th July 1882.
GEORGE EDWARD VAUGHAN, of 67 Chancery Lane, in the County of Middlesex,
Patent Agent,
"IMPROVEMENTS IN THE CONSTRUCTION OF GRAPNELS," A com-
munication to me from abroad by Samuel Trott, and Herbert Kingsford, both
of the City of Halifax, in the Province of Nova Scotia; in the Dominion of
Canada,
This Invention relates to the construction of grapnels for submarine telegraph
cable and torpedo work or other operation of a like nature, which grapnels are so
constructed and fitted that the presence of the cable on the same will be indicated
by electrical means at any desired distance the pressure of the cable causing such
indication.
To effect this the grapnel is constructed as follows:-A is the stem of the grapnel,
it has bored through its entire length a hole which carries in it an insulated wire b;
at b'., this wire branches to one or more prongs J. these prongs have holes bored
through them into which the wires b¹. are led, being there embedded in any elastic
insulating material or spring G. and terminating in a conducting surface h. a
washer d. is placed on the top of spring G. with a hole in its centre which allows
of the passage of the pin f, which is in connection with the plug c., this plug
working in the hollow of the compressing screw e., the screw i. closes the lower
opening of the cavity. The pin f. being screwed into the plug c can be lengthened
or shortened at will, in order to facilitate in conjunction with the compressing
screw e. the adjustment for any pressure.

page_text: In some cases a guard to protect the plug from the pressure of ooze and such
Bolids as pebbles and rock may be used.
The operation of the said invention, is now as follows. When the cable is
hooked, its pressure on plug c. will compress the elastic material or spring G. and
will cause pin f to come into contact with the conducting surface h. thereby.
completing a circuit and causing work to be done, such as the ringing of a bell, or
the deflection of a needle, which will thus give a signal that the cable is hooked.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Edward Vaughan in the Great Seal Patent Office on
the 4th January 1883.
GEORGE EDWARD VAUGHAN, of 67 Chancery Lane, in the County of Middlesex,
Patent Agent,
"IMPROVEMENTS IN THE CONSTRUCTION OF GRAPNELS," A com-
munication to me from abroad by Samuel Trott and Herbert Kingsford, both
of the City of Halifax, in the Province of Nova Scotia, in the Dominion of
Canada,
This Invention relates to the construction of grapnels for submarine telegraph
cable and torpedo work or other operation of a like nature, which grapnels, are so
constructed and fitted that the presence of the cable on the same will be indicated
- by electrical means at any desired distance, the pressure of the cable causing such
indication.
To effect this the grapnel is constructed as follows. A. is the stem of the
grapnel, it has bored through its entire length a hole which carries in it an
insulated wire b, at 6'. this wire branches to one or more prongs J. these prongs
have holes bored through them into which the wires 61 are led, being there
embedded in any elastic insulating material or spring G. and terminating in a
conducting surface h. a washer d. is placed on the top of spring G. with a hole in its
centre which allows of the passage of the pin f. which is in connection with the
plug c., this plug working in the hollow of the compressing screw e. the screw i
closes the lower opening of the cavity. The pin f. being screwed into the plug c.
can be lengthened or shortened at will, in order to facilitate in conjunction with
the compressing screw e. the adjustment for any pressure.
In some cases a guard to protect the plug from the pressure of ooze and such
solids as pebbles and rock may be used.
The operation of the said invention, is now as follows:-When the cable is
hooked, its pressure on plug c. will compress the elastic material or spring G and
will cause pin f to come into contact with the conducting surface h. thereby com-
pleting a circuit and causing work to be done, such as the ringing of a bell, or the
deflection of a needle, which will thus give a signal that the cable is hooked.
Having thus described and ascertained the nature of the said Invention and the
manner in which the same is to be performed I would observe in conclusion that

page_text: what I consider novel and original and therefore claim as constituting the
invention secured to me by the said herein before in part recited Letters Patent,
are:-
The improvements in the construction of grapnels, substantially as and for the
purposes hereinbefore set forth and described.
In witness whereof I the said George Edward Vaughan have hereunto set
my hand and seal this fourth day of January in the year of our Lord One
thousand eight hundred and eighty three.
ARA L
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(240.)