Improved Method of Mounting Compass Cards.
Year: 1893

page_text: Date of Application, 21st June, 1893
Complete Specification Left, 21st Mar., 1894-Accepted, 21st Apr., 1894
PROVISIONAL SPECIFICATION.
Improved Method of Mounting Compass Cards.
1 WALLACE JOHN REYNOLDS of 32 Crutched Friars, City of London, Marine-
Instrument Maker, do hereby declare the nature of this invention to be as
follows:-
This invention has for object mounting ships and like compass cards in an easy
and reliable manner.
The kind of compass card to which my invention mainly relates is that known as
Sir W. Thomson's (Lord Kelvin) card, i.e. a border suspended from a centre by
silk threads which were in given lengths and knotted to the border and centre
respectively.
According to my invention groove the outer face of aluminium or other ring
to which the outer edge of the border is secured in any easy manner and I form
holes at given distances apart in the groove. I also form notches in an annular
lip of the centre piece and pass silk or other thread from hole to notch and
vice versa in regular order the silk being preferably in one length to obviate knots.
I paste or otherwise secure the border (which has the compass markings upon it)
over the flange or edge of the ring and bind the same down by a narrow tape or
strip of paper.
I also paste or otherwise secure a strip or band of mica or the like upon the
under side inner edge of the border and I lace a thread through them to give
stiffness and to connect the border which may be in sections or segments for obtaining
flexibility from the centre piece and to ensure a free suspension of the card, the
thread also passing through the loops of the inner edge threads.
Dated this 21st day of June 1893
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said W. J. Reynolds.
COMPLETE SPECIFICATION.
Improved Method of Mounting Compass Cards.
I WALLACE JOHN REYNOLDS, of 32 Crutched Friars, City of London, Marine
Instrument Maker, 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 object mounting ships and like compass cards in an easy
and reliable manner.
The kind of compass card to which my invention mainly relates is that known as
Sir W. Thomson's (Lord Kelvin) card i.e. a border suspended from a centre by
silk threads, which were in given lengths and knotted to the border and centre
respectively.
According to my invention and as i show in the annexed drawings Figures 1
and 2 plan and edge view of ring and laced thread, Figures 3 and 4 plan and edge
views of card frame but without the magnets, Figure 5 a partial section on an
enlarged scale, I groove the outer face of an aluminium or other ring A, and I form
holes at given distances apart in the groove.
I also form notches in an annular lip.
[P1

page_text: of the centre piece B and pass silk or other thread C from hole to notch and vice
versa in regular order, the silk being preferably in one length to obviate knots
except at the finish as at D.
I paste or otherwise secure the border E (which has the compass markings upon
it) over the flange or edge of the ring A and bind the same down by a narrow tape
or strip of paper F.
I also paste or otherwise secure a washer or band G of mica or the like upon the
under side inner edge of the border E, and I lace a thread H through them to give
stiffness and to connect the border E which may be in sections or segments, as
indicated by the lines for obtaining flexibility from the centre piece and to ensure
a free suspension of the card, the thread also passing through the loops of the
inner edge thread.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The construction of mariners compass cards from a combination of grooved
ring A, notched lip centre B laced thread C washer G rim thread H and marked
border E pasted to ring A and edge covered by tape F the whole being arranged
or mounted and bound in the manner shown for the purposes set forth.
בד
1
CML 1904
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said W. J. Reynolds.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said W. J. Reynolds.