Year: 1884

page_text: I, JOHN VAUGHAN, Fitter Swansea Road Llanelly, Carmarthenshire JOHN
ALLEN WILLIAMS Newspaper Editor Alltyfran Villa Llanelly do hereby declare
the nature of our invention to be as follows:-
In size it can be carried in a waistcoat pocket, and is at all times ready for
taking nautical and astronomical observations for Latitude, Amplitude, &c., and
it is further suitable for all purposes of Land-surveying, levelling. It will also
be found pre-eminently useful in the study of mechanism, mathematics, astronomy,
and navigation, and for the exploration of new countries, as well as travelling at
home. It is so simple that its practical use as well as its theoretical explanation
may be understood by an ordinary student of the 5th Standard and upwards from
the Board and other Schools of the land. The Quadrant is accompanied with a
book of instructions, examples, and tables.
The construction of the Quadrant, including the Book of Instructions and Tables,
is as follows-The instrument has a plumbob with an index-hand attached, acted
upon by a spring at the back and by a holder on the surface which, when touched,
releases the bob to take the sweep of the half-circle index and when the observa-
tion is made and the spring released concurrently the holder fixes firmly the
index-hand on the required spot on the dial. For observation a set of tubes fixing
one into the other are attached, the smallest to observe the moon, the larger stars
of lesser or greater magnitude, or for observing elevated objects by day. For
taking the altitude of the sun, there are provided two shades, one on either side
the dial or surface of the quadrant. Attached to the book of instructions is also a
balf-circle index with appliance for taking angles or for other surveying pur-
poses. But the invention specially claimed protection for is the principle of
the plumbob and index-hand attached acted upon by a spring at the back and
secured by a holder on the front, as also the shades, as described, for taking the
altitude of the sun, and the tubes for observation.
Dated this twenty-seventh day of September. One thousand eight hundred

page_text: JOHN VAUGHAN, Fitter, Swansea Road Llanelly, and JOHN ALLEN WILLIAMS
Alltyfran Villa, Llanelly, Editor do hereby declare the nature of our invention
for A POCKET QUADRANT and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
The construction of the Quadrant, including the Book of Instructions and
Tables, is as follow: The instrument has a plumbob with an index-hand attached,
acted upon by a spring at the back and by a holder on the surface which when
touched releases the bob and the index-hand to take the sweep of the half circle
index, and when the observation is made and the spring released, the holder fixes
firmly the index-hand on the dial. For observation a set of tubes fixed one into
the other are attached, the smallest to observe the moon, the larger, stars of lesser
or greater magnitude, or for observing elevated objects by day. For taking the
altitude of the sun, there are provided two shades, one on either side of the dial,
or surface of the Quadrant. Attached to the Book of Instructions is also a divided
disc with appliance for taking angles or for other surveying purposes.
For a fuller description of the instrument we would direct attention to the
drawings accompanying. Fig. 1 represents the front elevation, A A A A are stops
on which the glass front rests; B the stop to keep sight tubes in position; D D the
position of sun shades projecting above the surface of the glass, as shewn in
figs. 2 & 3; H H the plumbob holder; P the plumbob; U the indicator attached
to plumbob; G G the divided disc or dial; T the tubes for observation. Figs. 2 & 3
represent the end elevations of the instrument; DD the sunshades; H H the back
section of the plumbob holder; F F the finger plate for actuating plumbob holder;
and S S the spring for actuating plumbob holder. Fig. 4 represents back eleva-
tion of the instrument; H H shewing the plumbob holder, and F the finger-plate
which presses the spring for actuating plumbob holder. Fig. 5 represents a section
of the instrument at C C.
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. The principle of the plumbob and index-hand attached, acted upon by a
finger-plate and spring at the back, and secured by the holder on the front of
the bob, see P U, H, F in drawings.
2. The half-circle index or divided disc, see G G in drawings.
3. The shades attached to the side of the instrument for taking observations of
the sun.
See D D in drawings figs. 2 & 3.
4. The tubes attached to the Quadrant (see T T) for the purposes of observation.
5. The manufacture of this instrument on the principles stated in all sizes.
Dated this Twenty-eighth day of August, One thousand eight hundred and
sighi Girra