A New or Improved Device or Contrivance for Use in connection with Drawing Pencils and the like.
Year: 1899

page_text: Date of Application, 30th Oct., 1899-Accepted, 2nd Dec., 1899
QUAIT LEIE DIMUITICATION.
A New or Improved Device or Contrivance for Use in connection with
Drawing Pencils and the like.
I, GEORGE DAVIDSON RODDA, of 97, Abbey Road, St. John's Wood, London,
N.W., Gentleman, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to a new or improved device or contrivance for use
in connection with drawing pencils and the like, the object being to provide
a cap designed to pass over and clip upon the top of a drawing pencil or other
drawing implement in connection with which it may be advantageously used,
and to furnished this cap with a sufficient number of projecting pins or
pricking points arranged around the periphery of the top of the cap and at
certain suitable distances apart for the purpose of enabling spaces, corresponding
to the distance at which the pins or pricking points are set apart, to be readily
marked off.
This device is provided with a detachable cap or cover for protecting the
pins or pricking points when not in use, said cap or cover being preferably
furnished on its upper extremity with a piece of india-rubber which allows of
the said cap being further usefully employed.
In order that this invention may be fully understood, I will now proceed to
describe same with reference to the accompanying drawings in which:-
Fig. 1 is a side elevation of a drawing pencil fitted with this improved
device complete.
Fig. 2 is a perspective view of one form of the device detached from the
pencil and with covering cap removed.
Fig. is a plan of Fig. 2, and
Fig. 4 is a vertical section through the device.
Figs. 5, 6 and are views illustrating other forms of construction herein.
after more fully referred to.
This improved device in the form shown at Figs. 1 to 4 consists of a tubular
sleeve a having a thickened upper part b and lower reduced walls which
are of such a thinness and elasticity as to sufficiently grip the top of the
pencil for securing the device in place. Five pins or pricking points care
arranged around the top of the thickened walls where they may screw into
position or be secured in any other suitable manner, while a covering cap d
preferably furnished at the top with a plug of india-rubber e covers and
protects the pins or pricking points c when not being used..
In the form of construction shown at Fig. 5 the top f of the device is
completely closed and the pins or pricking points which are headed, pass
through holes or perforations in the top f. A circular plate f¹ is arranged
beneath the heads and the whole is pressed closely up against the top f and
retained in that position by the sides of the device being pressed in beneath
the plate f in any convenient and suitable manner and as shown.
In the form of construction shown at Fig. 6 the pins c pass through the

page_text: top of the device, the inner part of which is then cut and bent back under
and against the heads of the pins c as shown at gy for the purpose of retaining
them in place, while to allow of the pins or pricking points being placed
further apart, sockets s may be secured to the top f of the device as shown
at Fig. 7 within which the pins or pricking points are secured in any suitable
manner.
Any number of pricking points may be employed in connection with a
device of this kind within the limits of practical utility, and these pins or
pricking points may be arranged at any predetermined distances apart, such
distances being considered with more particular regard to the different scales
employed by architectural, engineering and other draughtsmen, moreover, the
device is not restricted to the forms of construction herein described and shown,
the invention consisting essentially in furnishing the top of a drawing pencil
or other drawing implement of a like nature, with pins or pricking points and
with or without the agency of a cap designed to clip on to such pencil or
drawing implement.
The device is preferably constructed of hard metal with steel pins or pricking
points, but it may be constructed out of any material or combination of
materials suitable for the purpose, while it is preferably formed as a separate
detachable article and capable of being applied to any existing drawing pencil
or the like.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1/. The combination with a drawing pencil or the like such as p of a metal
cap or clipping device such as a furnished with pins or pricking points such
ase and protected when not in use by a covering cap such as e, the whole
combined and arranged substantially as herein described and shown in the
accompanying drawings and for the purposes specified.
2. The new or improved device or contrivance for use in connection with
drawing pencils and the like, consisting of a sleeve such as a designed to spring
over and clip onto the top of the pencil, in combination with pins or pricking
points such as e arranged around the top of the sleeve a and a covering cap
such as d, substantially as herein described and shown with reference to the
accompanying drawings and for the purposes specified.
3/. The furnishing of the top of a drawing pencil such as p or other similar
drawing implement with pins or pricking points such as e through the medium
of a sleeve such as a designed to clip on to or be secured to the top of such
drawing pencil or the like, substantially as set forth.
4/. In the device such as above clainied, the various forms of construction
substantially as herein described and shown with reference to Figs. 5, 6 & 7
of the accompanying drawings.
CASSELL & Co.,
22, Glasshouse Street, Regent Street, London, W.
Agents for the Applicant.