Improvements in Extension Standards for Floor or other Lamps or other Analogous Purposes.
Year: 1889

page_text: Date of Application, 22nd May, 1889
Complete Specification Left, 22nd Feb, 1890-Accepted, 22nd Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Extension Standards for Floor or other Lamps or
other Analogous Purposes.
We EDMOND BERZELIUS TILLAM, and EDGAR HARRISON, both of Gothic Arcade,
Snow Hill, Birmingham, in the county of Warwick, Mechanical Engineers, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in what are known as lamp extension pillars
or standards, and which may be used for other analogous purposes, and has for its
object an improved combination and arrangement of parts, whereby the extensible
rod or tube may be secured in any given position, by means of a moveable collar
or disc travelling with the said extensible tube, and embracing or sliding upon fixed
longitudinal wires, which said wires also similarly pass through the lower end of the
said extensible tube, in such a manner that when the aforesaid collar is drawn
closer to the lower end of the extensible tube, the said wires are contracted, and prevent
further movement.
In constructing this our invention, we proceed somewhat thus :-
Within the lower part or pillar of the standard, two or more longitudinal wires
are fixed, if two, diametrically opposite to each other, if more, in a circle. The one
end of these wires being fixed to the upper part of the pillar, and the other to the
lower part of the said pillar.
Within these wires, slides the extensible tube, having at its lower end a disc or
flange, provided with holes through which these wires pass just freely, its outer
diameter freely sliding within the outer lower tube.
Again. Near the upper end of the extensible tube is a lever or its equivalent, con-
nected to or acting upon a central rod, which passes down the centre of the tube, and
extending somewhat below it.
This central rod is held up in a raised position by means of a spiral spring. At the
lower end of this central rod is attached a disc or collar, in which are holes corre-
sponding to the number of longitudinal wires, and through which the said wires pass.
These holes however, are somewhat nearer to each other in their circle or diametrical
line than the holes in the flange upon the lower end of the extensible tube.
Thus, the action of the spring upon the central rod is always to draw the moveable
are wider apart
disc nearer to the flange, but inasmuch as the holes in the one
than in the other, the disc in its upward motion contracts the said wires upon the
insides of the holes in the flange, and thereby jams or binds it firmly to the said
fixed wires, preventing any further motion of the extensible tube.
Upon however pressing the lever, the moveable disc is pushed farther away from
the flange, when the elasticity of the wires, readily permit the slight curve in their
form, necessary to freely slide through both the flange and also the disc, until the
lever is again acted upon by the spring as aforesaid.
In some cases we may place the wires to pass up into the extensible tube in its
descent, and secure them firmly only at their lower end, when the action of the disc
and lower end of the extensible tube would be similar to that already described, but
modified to suit requirements.
1000
CHARLES T. POWELL,
Applicants' Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Extension Standards for Floor or other Lamps or
other Analogous Purposes.
We, EDMOND BERZELIUS TILLAM, and EDGAR HARRISON, both of Gothic Arcade,
Snow Hill, Birmingham, in the county of Warwick, Mechanical Engineers, 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 to improvements in what are known as lamp extension
pillars or standards, and which may be used also for other analogous purposes, and has
for its object an improved combination and arrangement of parts, whereby the
extensible rod or tube may be secured in any given position, by means of a moveable
collar or disc travelling with the said extensible tube, and embracing or sliding upon
fixed longitudinal wires, which said wires also similarly pass through the lower end
of the said extensible tube, in such a manner that when the aforesaid collar is drawn
closer to the lower end of the extensible tube, the said wires are contracted, and prevent
further movement.
We will now proceed to more fully explain this our invention having reference to
the accompanying illustrative sheet of drawings upon which are figures and letters
of reference, similar letters referring throughout the several views to the same thing
or part.
Fig. 1, is a general sectional elevation of this our invention.
Figs. 2, 3, and 4, are detail views of parts of the said invention.
In constructing this our invention we proceed somewhat thus :-
Within the lower part or pillar A, of the standard, two or more longitudinal wires b, b,
are fixed, if two, diametrically opposite to each other, as seen in Figs. 2 and 3, if more,
in a circle, as shown for instance in Fig. 4. The one end of these wires being fixed
to the upper part of the pillar, by secure attachment to the collar
ends to the lower part of the said pillar at d.
and their other
Within these wires b, slides the extensible tube e, having at its lower end a discor
flange, provided with holes g, through which these wires pass just freely, its outer
diameter freely sliding within the outer lower tube a.
Again. Near the upper end of the extensible tube e, is a lever h, or its equivalent,
connected to or acting upon a central rod i, which passes down the centre of the
tube e, extending somewhat below it. This central rod i, is held up in a raised position
by means of a spiral spring j. At the lower end of this central rod i, is attached a disc
or collar k, in which are holes l, corresponding to the number of longitudinal wires,
and through which the said wires pass. These holes however, are somewhat nearer
to each other in their circle or diametrical line, than the holes in the flange upon
the lower end of the extensible tube, as indicated by the dotted lines, (see Figs. 2
and 3).
Thus, the action of the spring j, upon the central rod i, is always to draw the
moveable disc k, nearer to the flange f, but inasmuch as the holes 9, in the one, are
wider apart than holes 1, in the other, the disc k, in its upward motion contracts the
said wires upon the insides of the holes g, in the flange, and thereby jams or binds
it firmly to the said fixed wires, preventing any further motion of the extensible
tube e.
Upon however pressing the lever h, the moveable disc k, is pushed farther away
from the flange, when the elasticity of the wires b, readily permit them, (with the
slight curve in their form) to freely slide through both the flange f, and also the
disc k, until the lever h, is again acted upon by the spring j, as aforesaid.
In some cases we may make the wires b, to pass up into the extensible tube e, and
secure them firmly only at their lower end, but the action of the disc k, and lower
end of the extensible tube f, would be similar to that already described, but modified
to suit requirements.

page_text: In Fig. 4, three of such wires are shown but as will be apparent a greater
number may be used if desirable.
Having now particularly described and ascertained the nature of our said Inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1st. In an extensible pillar or standard, the employment and combination of wires
or flexible rods, with contracting moveable discs, constructed and acting substantially
as hercin described and illustrated upon the drawings and for the purposes specified.
2nd. The general combination and arrangement of parts constituting an extensible
standard, substantially as herein described and illustrated upon the drawings.
Dated this 21st day of February 1890.
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicants' Agent.