Improvements in Spirit Levels and Clinometers.
Year: 1891

page_text: Date of Application, 12th Feb., 1891
Complete Specification Left, 11th Nov., 189:-Accepted, 19th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Spirit Levels and Clinometers.
1, WILLIAM JONES INGRAM 9 Gideon Road Lavender Hill London S.W.
Builder do hereby declare the nature of this invention to be as follows:-
This invention relates particularly to certain improvements in the arrangement
of the class of spirit levels having a hinged base or bed piece, adjusting screw and
index for ascertaining various gradients and consists in the combination of a
quadrant attached to the base or bed piece by which greater scope is given in
ascertaining steep gradients, also, by which arrangement the spirit level can be set
accurately to a right angle with the base or bed piece. The quadrant is slotted,
and a set screw on the spirit level travels in the said slot.
Dated this 12th February 1891.
E. EATON,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Spirit Levels and Clinometers.
WILLIAM JONES INGRAM 9 Gideon Road Lavender Hill London S.W.
Builder 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 relates particularly to certain improvements in the arrangement
of the class of spirit levels having a hinged base or bed piece, adjusting screw and
index for ascertaining various gradients and consists in the combination of a
quadrant attached to the base or bed piece by which greater scope is given in
ascertaining steep gradients also by which arrangement the spirit level can be set
accurately to a right angle with the base or bed piece. The quadrant is slotted,
and a set screw on the spirit level travels in the said slot.
Fig. 1 of the annexed drawings shows plan of an adjustable spirit level with
quadrant attached.
Fig. 2 side elevation of same.
Fig. 3 elevation of indicating plate.
Fig. 4 back view of level showing the hinge.
Similar reference letters refer to corresponding parts.
A is a sole piece which is attached by means of a hinged joint B. to a spirit
level S. working in a quadrant K. This level S is adjusted by means of a thumb-
screw G. passing into the nut H. which works on a pivot I. to allow sufficient
play when adjusting same. The dotted lines shown at A' represent the sole piece
set to a grade of 24 inches in, say 10 ft. When the desired angle is obtained by
using the thumb screw G. it is secured by the set screw J. on the graduated
piece E. D is a curved piece of metal secured to the sole piece A. and working
in a dovetail D' on the level S: this piece of metal is suitably graduated.
device set at right angles..
The dotted lines A show the

page_text: 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 :
(1) The quadrant K in combination with an adjustable spirit level substantially
as shewn and set forth in the annexed Specification and drawings.
Dated this 11th day of November 1891.
E. EATON,
Agent for Applicant.