An Improved Tellurion.
Year: 1896

page_text: Date of Application, 7th July, 1896-Accepted, 8th Aug., 1896
COMI DEID DEVITICATION.
An Improved Tellurion.
1, ROBERT MCADAM REDPATH, of Vine Street, Bendigo, in the Colony of
Victoria, Pattern-maker, 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 improved tellurion has been devised to better illustrate the daily and
annual motions of the earth in order to demonstrate the cause of day and night, as
well as the various seasons of the year.
As a matter of convenience I will at once proceed to describe my invention by
reference to the accompanying drawings,-wherein,
Figure 1 is a side elevation,
Figure 2 a vertical central section, and
Figure 3 a plan of my improved tellurion.
Figure 4 is an elevation showing the apparatus folded up for transport.
Figure 5 is a plan of the dish or cup used for illustrating the circle of
illumination on the earth globe.
Figures 6 and 7 are a longitudinal section and plan respectively of the radial
arm which carries the earth globe.
Figure 8 is a perspective view of the pivotted bracket which carries the earth
globe spindle, the end of the radial arm upon which it is mounted and the
longitudinally sliding bar which operates it.
Figures 9 and 10 are a central section and a plan respectively of said
longitudinally sliding bar.
The same letters of reference indicate the same parts in all the figures.
A represents a circular wooden table or stand which can be folded as represented
in Figure 4.
It is formed with a groove B in its periphery and an eccentric or cam ring C
upon its upper surface having a groove D formed in it to receive a pin E projecting
downwards from a longitudinally sliding bar F which is adapted to slide upon a
radial arm G carrying at its outer end a bracket H through which passes the
spindle 1 of a globe J representing the earth. This bracket is pivotted to the
radial arm G as indicated at K so that it can move sideways and it is pivotted as
illustrated at K' on the end of the pivot pin upon which it is supported so that it
is capable of being turned over in a direction longitudinally of the bar F and
arm G. The bracket H is connected to the sliding bar F by means of a
projection L passing through a hole in the end of said bar, so that in the travel of
said arm the bracket H will be moved upon its pivot in such a way as to maintain
the proper angle of the spindle of the earth globe.
Motion is imparted to the radial arm G carrying the earth globe J through the
medium of bevel gear M, a crank handle N and a spindle O extending underneath
the table A and the necessary rotary motion is imparted to the earth globe
spindle I to correspond with the diurnal motion of the earth, by an endless cord P
passed around the peripheral groove B in the stand or table A and around a small
pulley Q secured upon said spindle.
A globe R representing the sun is mounted upon a wire S passing through the
central spindle T of the tellurion and a third globe U to represent the moon is
mounted upon a wire V projecting from a small loose pulley W upon the spindle
of the earth globe. Motion is imparted to the moon globe U by a cord X passing
Pain

page_text: around a groove Y in the periphery of the eccentric or cam ring C which as above
mentioned is secured upon the stand or table A of the contrivance.
The radial arm G has an oval groove Z in its outer end with a shoulder Z¹ at
each end to prevent the retrograde movement of a pin Z³ projecting downwards
from the longitudinally sliding bar F which in conjunction with said oval groove
regulates the angle of the earth globe spindle I.
The longitudinally sliding bar F used for determining the angle of the earth
globe spindle 1 is constructed so that it may be reversed in order to maintain said
spindle in its perpendicular position and thus enable the inevitable result of no
change of seasons to be demonstrated. When thus reversed the pin E is taken out
of the eccentric groove and what was the upwardly projecting part of the pin Z² is
inserted in a hole Z³ in the end of the arm G so as to lock said arm and therefore
the bracket H in such a way as to maintain the spindle of the earth globe always
in a vertical position.
A card-board or other dish or cup 1 constructed as illustrated in Figure 5 is
provided for the purpose of being fitted over the earth globe in order to illustrate
the circle of illumination. Said dish or cup is formed with notches 2 in order that
it may be fitted in the desired position over said earth globe when the spindle of
said globe is at an angle.
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 improved tellurion herein described consisting of the various parts
constructed combined and operating substantially as and for the purposes specified
and as illustrated in the accompanying drawings.
2. In a tellurion a bracket (such as H) pivotted upon a rotating arm and
carrying the spindle of the earth globe in combination with a longitudinally
sliding bar (such as F) actuated by a fixed eccentric groove ring on the main
frame or table of the apparatus in conjunction with an oval groove in the end of
said arm substantially as and for the purposes specified and as illustrated in the
accompanying drawings.
3. In a tellurion an earth globe carried upon a pivotted bracket capable of
being adjusted in two directions so as to enable the spindle of said globe to
be maintained at the correct angle throughout its travel round the sun globe
substantially as and for the purposes specified and as illustrated in the accompanying
drawings.
4. In a tellurion the reversible longitudinally sliding bar F adapted to either
rock the spindle of the earth globe or to maintain it in its vertical position
substantially as and for the purposes specified and as illustrated in the accompanying
drawings.
5. In a tellurion a radial arm (such as G) carrying the earth globe spindle and
formed with an oval shaped groove (such as Z) at its outer end substantially
as and for the purposes specified and as illustrated in the accompanying
drawings.
Dated this 7th day of July One thousand eight hundred
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C.