Year: 1895

page_text: I, WALTER PIGOT, of Richview, Dundrum, in the County Dublin, Ireland,
Gentleman, do hereby declare the nature of this invention to be as follows
:-
The object of this invention is to produce a new or improved apparatus for the
purpose of erasing pencil, ink, colour, and the like in a simple expeditious and
effectual manner.
In carrying out my invention I arrange two pieces of suitable tube, one sliding
telescopically within the other.
The inner tube is closed at the top by an ornamental knob and through a
threaded aperture in the lower end works a spirally grooved rod, the inner end of
which impinges against a spiral or other suitable spring contained in the tube for
the purpose presently described.
At a suitable distance from the free end of the spirally grooved rod is fixed a
collar which abuts against an internal shoulder formed on the lower end of the
outer tube, thus allowing a certain portion of the rod to project beyond said outer
tube, and on this exposed portion of the rod is mounted the india-rubber or other
material suitable for the purpose of erasing pencil, ink, colour, or the like. Over
this rubber envelope is then placed a suitable hood which is secured to the end of
the outer tube and which serves as a guard for the rubber when the instrument is
not in use, and as a guide when an erasure is being made.
As thus constructed the action of my invention is as follows:-
In the normal condition of the instrument, the inner tube projects somewhat
beyond the outer tube owing to the action of the spiral spring in pressing forward
the spirally grooved rod, and the fixed collar, on the latter abutting on the internal
shoulder of the outer tube.
Now upon pressing down the inner tube, the spiral spring is compressed and the
rod receding through the threaded aperture assumes a rotatory motion in one
direction, and upon the removal of the pressure, the spring re-expanding extends
the inner tube from the outer and imparts to the rod a rotary motion in the reverse
direction.
.
Thus by the intermittent pressure on the inner tube an alternating rotatory
motion is imparted to the rod and consequently to the eraser carried on its
free end.
The instrument is used by applying the rubber to the matter to be erased, then
alternately pressing and releasing the inner tube whereupon a rapidly alternating
rotatory motion is produced, and this rolling action speedily and effectually
accomplishes the object in view.
1
L1005
J. K. FAHIE & SON,
9 Westland Row, Dublin, Agents for Applicant.

page_text: I, WALTER PIGOT, of Richview, Dundrum, in the County Dublin Ireland,
Gentleman 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 :-
The object of this invention is to produce a new, or improved apparatus for the
purpose of erasing pencil, ink, colour and the like in a simple, expeditious and
effectual manner.
The accompanying drawings will enable my said invention to be more readily
understood and applied in practice.
Fig. 1, represents the instrument complete in its closed form,
Fig. 2, shews the inner tube partly drawn out,
Fig. 3, is a longitudinal section, and
Fig. 4, is a detachable detail hereinafter more fully described.
A, and B, are two suitable tubes of brass, or other suitable material.
The tube B slides telescopically within the tube A and is closed at the top by
an ornamental knob C. Through a threaded collar I, carried in the lower end,
works a spirally grooved rod 2, the upper end of which impinges against a spiral
spring 3, while the lower end runs through the collar 4, and carries a disc 5,
beyond which it carries a shoulder 6, and terminates in a threaded point as shewn.
On this point is screwed a suitable ball of india-rubber, or other suitable material
for the purpose of erasing pencil, ink, colour or the like.
Over this end of the apparatus slides a hood 7 (Fig. 4) provided with an
aperture 8, through which the iudia-rubber is exposed. This hood serves as a
guard for the rubber when the instrument is not in use, and as a guide, when an
erasure is being made.
The tube B is provided with a stud 9, which engages in a bayonet slot in the
head of the tube A whereby the instrument is maintained in its closed form when
not in use.
As thus constructed the action of the apparatus is as follows.
Upon releasing the stud 9, from the bayonet slot the spiral spring forces the
tube B outwards, during which movement, the spirally grooved rod is caused to
rotate in one direction, while upon pressing home the tube B it (the spirally
grooved rod) is caused to rotate in the reverse direction.
Thus by the intermittent pressure of the tube B an alternating rotatory motion
is imparted to the rod and consequently to the rubber carried on its free end.
The instrument is used by applying the rubber to the matter to be erased, then
alternately pressing and releasing the tube B whereupon a rapidly alternating
rotatory motion is produced, as described, and this rolling or rotatory action
speedily and effectually accomplishes the object in view.
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,
The use and application of an apparatus, constructed, arranged and operating in
the manner and for the purpose substantially as herein specified and set forth.
--
Dated this 19th day of September 1896.
J. K. FAHIE & SON,
9 Westland Row, Dublin, Agents for Applicant.