Improved Means applicable to Articles where an Advancing and Retiring Motion is Required.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improved Means applicable to Articles where an Advancing and
Retiring Motion is Required.
We, HARRY LAMBERT SYMONDS, of the Firm of S. Mordan and Company,
Manufacturers, and JOHN PUGH, Engineer, both of 41 City Road, in the County
of London, do hereby declare the nature of this invention to be as follows:-
:-
This invention relates to improved means applicable to articles where an
advancing and retiring motion is required, such articles being for instance, pencil
cases, tooth-picks, penholders, copying presses, music stools, surgical and other
instruments, and it has for its object to so construct these articles that when in
their advanced position they shall be securely held in place without fear of their
retiring, and also to avoid friction in the working thereof.
In applying our invention, say, to a pencil case, we dispense with the usual
longitudinal slot in the inner tube, and in which slot slides the pin or stud of the
carrier, and in place thereof we employ a spiral slot so arranged that its
inclination is at right angles to that of the spiral groove or slot, forming the
guide for the pin or stud, in the outer casing of the instrument.. We thus obtain
a quick action; and the pencil, when in its advanced position is prevented from
retiring, owing to the pin or stud of the carrier being maintained in the angle
formed by the crossing of the two spiral slots or grooves. And as the inclination
of the spiral slot is at right angles to that of the guide, this latter does not tend
to force the pin or stud against the side of the slot, and hence friction in working
is avoided.
Furthermore, by means of our invention the pencil is caused to revolve while
being projected, and hence binding is obviated.
Or we may employ two spiral slots, the pin or stud in this instance projecting
on either side of the carrier and entering both the slots. A stronger construction
is thereby obtained which will be found useful when applying the invention to
heavier articles, such as music stools and copying presses.
Dated this 20th day of September 1894.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improved Means applicable to Articles where an Advancing and
Retiring Motion is Required.
We, HARRY LAMBERT SYMONDS, of the Firm of S. Mordan and Company,
Manufacturers, and JOHN PUGH, Engineer, both of 41 City Road, in the County
of 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, reference being had to the accompanying drawings
and to the letters and figures marked thereon, that is to say :-
This invention relates to improved means, applicable to articles where an
advancing and retiring motion is required, such articles being, for instance, pencil-
cases, tooth-picks, pen-holders, surgical and other instruments, and it has for its
object to so construct these articles that when in their advanced position they
shall be securely held in place without fear of their retiring, and also to avoid any
binding action in the working thereof.
In applying our invention, say to a pencil-case, we dispense with the usual
longitudinal slot in the inner tube, and in which slot slides the pin or stud of the
pencil carrier, and in place thereof we employ a spiral slot so arranged that its
inclination is at right angles, or thereabouts, to that of the spiral groove, or
grooves, in the outer tube or casing of the instrument, forming the guide for the
pin or stud.
Or we may employ two spiral slots in the inner tube, the pin or stud in this
instance projecting on either side of the carrier and entering both the slots.
And in order that the invention may be better understood, we will describe the
same fully with reference to the accompanying drawings, in which:
Fig. 1 is an elevation, Fig. 2 a longitudinal section, partly in elevation, and
Fig. 3 a cross section, showing our invention applied, by way of example, to a
pencil-case.
Fig. 4 is an elevation of the inner tube detached from the outer casing.
Fig. 5 shows, also in elevation, a modified arrangement of inner tube having two
spiral slots.
Referring to Figs. 1 and 2, a is the outer tube or casing of the pencil-case,
which is formed with spiral grooves or flutings serving as guides for the pin or
stud hereinafter mentioned. is the inner tube, and is the spiral slot therein,
the twist or inclination of this slot being approximately at right angles to the
grooves or flutings of the outer casing. In the example shown, the slot forms a
left hand spiral, and the flutings a right hand spiral, but if desired the reverse
position could be adopted. At its rear end, the inner tube b is provided with a
knob or head b, for rotating it, and at its front end a collar 63 is secured to it and
fits closely up against the end of the outer casing a, which casing is held on the
inner tube between the said head and collar, so that longitudinal movement,
relatively to one another, is impossible, while either of them, however, is free to
turn.
c is the carrier in which is fitted the pencil d, and c¹ is the pin or stud of the
carrier which works in the slot 6' and engages in one or other of the spiral grooves
or flutings of the outer casing.
By rotating the inner tube b, (by means of the head (2), or the outer casing a,
the pin or stud c¹ is caused to travel in a forward or backward direction, according
to the way in which the tube is turned, thereby advancing or withdrawing the
pencil, and, as the pin travels, a motion of rotation is imparted by it to the carrier
and pencil, as it follows the spiral grooves or flutings of the outer casing.
It will readily be seen that by reason of the slot b' being of spiral form, and of
an opposite twist to the flutings of the outer casing, we obtain a quick action,

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and the pencil, when in its advanced position, is prevented from retiring, owing to
pin or stud of the carrier being maintained in the angle formed by the crossing
of the spiral slot and the fluting. Moreover, as the inclination of the spiral slot
is at right angles to that of the fluting or outer casing, and as the pencil is caused
to rotate when being advanced or retired, binding is obviated.
In the modified arrangement shown in Fig. 5, two parallel spiral slots b' are
formed in the inner tube b, and two pins or studs c¹ are provided on the carrier c,
one on each side thereof, and pass through the slots and enter the grooves or
flutings in the outer tube or casing, thereby equalising the strain. A stronger
construction is thus obtained which it will be found useful to adopt when applying
the invention to heavier articles.
Although we have described and shown our invention as applied more especially
to a pencil-case, it will be obvious that it can be applied in a similar manner to
tooth-picks, pen-holders, and surgical and other instruments.
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. Means for obtaining an advancing and retiring motion, comprising an outer
tube or casing, having spiral grooves or flutings, and an inner tube having a spiral
slot, or slots, running at right angles, or nearly so, to the grooves or flutings in
the outer tube, a carrier to which the motion is imparted being arranged within
the inner tube and provided with a pin, or pins, projecting through the spiral slot,
or slots, and engaging the grooves or flutings of the outer casing, substantially as
set forth.
2. A pencil case (or like instrument) provided with a grooved or fluted outer
casing surrounding an inner tube in which works the pencil carrier, said inner tube
having one or more spiral slots running at right angles to the grooves or flutings
of the outer casing, and the pencil carrier having pins engaging both the slot, or
slots, and the groove, or grooves, so that by turning either the inner or the outer
tube, an advancing, or retiring, and at the same time a rotary motion, is imparted
to the pencil, substantially as described and shown with reference to the drawings.
3. Our improved means applicable to articles where an advancing and retiring
motion is required, whereby, when applied to such articles, will securely hold
them in place when in their advanced position, and without fear of their retiring
when in use, substantially as herein before described and shown in the annexed
drawings.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 5* Market Street, Nottingham,
Agent for the Applicants.