Improvements in or relating to Surveying or Military Sketching Boards.
Year: 1887

page_text: Date of Application, 21st Mar., 1887.
Complete Left, 4th Apr., 1887.
Complete Accepted, 14th June, 1887.
PROVISIONAL SPECIFICATION.
Improvements in or relating to Surveying or Military Sketching
Boards.
I WILLIAM WILLOUGHBY COLE VERNER Esquire Captain in the Rifle Brigade
of the Junior United Service Club, Charles Street, London do hereby declare the
nature of this invention to be as follows:-
A method of adjusting the drawing paper the board by means of a special pattern
of roller fitted on either side of the board in a special manner & which rollers are
capable of being rigidly fixed when required by means of clamping screws of a
peculiar design & which clamping screws serve also as spindles upon which the rollers
can revolve when unclamped.
The other features of novelty" in the board are the addition of certain measure-
ments scales and angles engraved upon it whereby the board can be used as a
clinometer & for other surveying purposes.
The special pattern of roller is a hollow cylindrical metal tube with a longitudinal
slit in it to hold the drawing paper, the ends of the roller as provided respectively
with a spindle & a hollow boring to receive a spindle.
The special manner in which the roller is fitted to the board is by means of the
spindle already mentioned as forming part of the roller & by means of a screw
terminating in a spindle which fits into the other end of the roller.
The peculiar design of clamping screw is a screw working in a collar, the lower
part of which screw is unprovided with a thread & thus forms a spindle.
Dated this Twentieth day of March 1887.
WILLIAM WILLOUGHBY COLE VERNER,
Capt. Rifle Brigade.

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to Surveying or Military Sketching
Boards.
1 WILLIAM WILLOUGHBY COLE VERNER Captain in the Rifle Brigade of the
Junior United Service Club Charles Street London 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:-
G
The drawing Board "AAAA" figure 1 has a head piece BB (in which a
magnetic compass is fixed) and a footpiece "CC" which are both keyed to the board
by means of metal keys as shewn at D D, D D figure 2. The headpiece B B and the
footpiece CC both project beyond the edges of the board A A as shewn at A B, A C
and between these projections two cylindrical metal rollers E E, E E are adjusted so
as to turn freely. At either end of the headpiece B B is a metal shoulder F F, a
section of which is shewn at the right hand side of figure 1, which shoulder is provided
with a female screw as at M and through which a low-pitched flat-headed thumb-
screw "L" works. This thumbscrew "L" is unprovided with any screw-thread on
its lower portion and thus forms a spindle upon which the roller can turn freely. At
the top of this spindle "J a small stud is screwed in so as to obviate the possibility of
the thumbscrew "L" working out and being lost. The rollers EE, E E are hollow
with the exception of a small portion at either end of each as shown in the section
at "G," they are provided with narrow longitudinal slits "HH" to receive the ends
of the drawing paper which is subsequently rolled round them.
"
In the solid portion of each roller in the end next to the head-piece "BB" is a
cylindrical boring, into which the spindle "J" fits. At the end of the rollers next to
the footpiece "CC" a spindle projects into a boring in the footpiece as shewn
"K" in figure 2. The rollers therefore turn freely on these spindles.
at
To clamp the rollers, the thumbscrews "L" are turned so as to lower them
through the female screws as at "M" and the lowest point of the spindle is thus
brought to bear against the base of the cylindrical boring in the roller and into which
the spindle "J" fits. By the pressure thus exerted on the top end of the rollers, the
lower ends are pressed against the footpiece and the rollers are rigidly jammed or
clamped.
By adjusting the clamping screws, the rollers can be only partially clamped so as to-
revolve with any required degree of stiffness.
When a strip of drawing paper has been attached to the rollers by means of
inserting a small portion of either of the ends into the longitudinal slits in the
rollers, the drawing paper can be rigidly stretched across the board between the
rollers by clamping first one roller and then the other.
2. The magnetic compass "0" is sunk-in-a-metal-collar "P" which is graduated
round its circumference into divisions of ten degrees the quadrants being clearly
marked as shewn at "P, P, P, P."

page_text: 3. The footpiece "CC" is ongraved along its upper edge with scales of six inches
and four inches to a mile as shown and also with a normal scale of horizontal
equivalents for surveying purposes. The lower edge of the footpiece is engraved
with a scale of inches and tenths of inches and exactly opposite to the inch graduations
in the footpiece a similar series of graduations are made on the lower edge of the head
piece "BB" as shewn.
4. On the metal shoulders "FF" at either end of the head piece, other scales are
engraved as may be required as shewn.
5. On the back of the drawing board A A A A (see figure 2) a semi-circular
protractor "VVV" is fixed, a small hole is bored through the footpiece at "Q" to
permit of a plumb line being adjusted and by means of which the board can be used
as a clinometer for the measurement of slopes.
a
6. The strap "RR" by which the board is attached to the wrist is fitted through
flat metal collar "SS" which is fixed to a stud "T" which turns freely in a plate
let in to the back of the board. This arrangement is for mounted work on horseback
when the board would be strapped to the arm for work on foot, the strap & stud
would be replaced by an ordinary plane table attachment.
7. The size of the board varies according to the necessities of the case; for working
on horseback, the size as shewn in the drawings would be the most usual one,
namely nine inches by seven inches for work on foot, the size would be about thirteen
inches by nine inches.
Having now particularly described and ascertained the nature of my said invention
and in what manner the said is to be performed, I do declare that what I claim is :-
.
(1.) A novel pattern of rollers whereby drawing paper can be adjusted to a drawing
or sketching board and which rollers are capable of being rigidly clamped by means
of clamping screws, the lower portions of which act as spindles for the rollers to
turn upon.
(2.) The addition of certain scales measurements and angles engraved upon the
drawing or sketching board whereby the said board can be used in the field as a
clinometer or for other surveying purposes without having recourse to other
mathematical instruments.
Untold his auth
A1007