US913074A - Tellurian. - Google Patents

Description

L. H. VAN SYGKLE.

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Patented Feb. 23, I909.

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L. H. VAN SYGKLE.

I TELLURIAN. APPLIUATIOH FILED MAR. 28, 180B.

Patentad Feb. 23, 1909.

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LEONIDAS H. VAN SYGKLE, OF FORT LEE, NEW JERSEY.

TE LLURIAN.

Specification of Letters Patent.

Patented Feb. 23, 1909.

Application flied March 26, 1908. Serial No. 423,344.

To all whom it may concern:

Be it known that I, LEONIDAS H. VAN

SYoKLE, a citizen of the United States, and a resident of Fort Lee, in the county of Bergen and State of New Jersey, have invented certain new and useful Im rovements in Tellu rians, of which the fol owing is a specification.

The invention relates to a tellurian used to instruct children in the various natural phenomena of the solar system, such as the approximate movement of the earth as rotating on its own axis it revolves around the sun, thus causing day and night and the seasons; in the relative position of the planets to the earth and sun; and to illustrate the fixed inclina tion of the axis of the earth to the lane of the earths orbit, the fixed general direction in which the axis points, and its relative positions to the sun during the earths revolution.

The invention consists of a combination of mechanical contrivances which, when operated in unison, will impart simultaneously to a sphere representmg the earth and mounted upon an inclined axis, a rotating movement around its own axis and a revolving movement around a predetermined fixed point representing the sun.

The invention further consists of mechanical means for keeping the outer edge of the inclined pulley at a constant distance from the axis of the non-rotatable driving pulley, thus maintaining an even tension in the driving flexible connection. All of which will-be fully described and pointed out in the claims.

In the drawings Figure 1 is a side elevation of the invention representing in its entirety a tellurian. Fig. 2 is a lan of Fig. 1. Fig. 3 is also a side elevation oi the tellurian in which is shown the manner of illustrating the relative ositions of the celestial bodies forming the ipper to the earth in its various stages of rotation and revolution; it likewise illustrates the positions of other planets as well. Fig. 4 is a cross section of the rotatable base showing the manner in which the angular arm is mounted upon it. Fig. 5 is a detached plan of the rotatable base or disk in which is shown the groove adapted to receive the angular arm from which extends the inclined axis. Fig. 6 is a diagram of the main mechanical feature of my invention. Here is shown the center of the inclined pulley lying on the prolongation of the axis of the rotatable base, thus maintaining at all times a fixed distance between the axis of the nonrotatable pulley and the outer and driven edge of the inclined pulley, and maintaining a constant and equa tension upon the driving flexible connection and producing a smooth and even rotation of the sphere representing the earth.

Similar letters refer to similar parts throughout the drawings in which the base a. may be made in any shape and of any material desired, and is provided with a vertically rojecting stud b. centrally located thereon. pon the stud b.is loosely mounted a radial swinging arm 0. having mounted concentrically with its axis a non-rotatable circular disk d.; the longer extension of the said radial swinging arm a. is provided, near its outer extremity, with the rotatable base or disk e. driven from the fixed circular disk (1. by means of a flexible connection. The disk d. and the base e. are e ual in diameter so that the base 6. Will msiire one complete revolution for each complete revolution of the swinging arm 0., thus the successive positions assumed b the inclined axis of the globe representing the earth will be arallel.

he rotatable base or disk 6. is provi ed with the centrally located vertical perforation f. the latter terminating into an angular groove 9. and adapted to receive the corres 0ndingly shaped extension of the incline axis 7. representing the axis of the earth, thus preventing the latter from rotating in the ase e. and causing the motion of the axis h. to coincide with that of the base. There is mounted upon the inclined axis h. and above the rotatable base or disk e. the spherical body i. the latter adapted to engage with the corres ondingly shaped concavity lo cated on t e base of the pulley k. which is rigidly secured to the s here 8. the whole of which is mounted loose y upon the inclined axis h. The said pulle k. is connected with the non-rotatable pu ley Z. mounted concentrically with the axis of the arm a. by means of the crossed flexible connection m. The distance between the non-rotatable pulley l. and the pulley k. is ke t constant b6? reason of the center of the pu ey k. coinci ing with the prolongation of the axis of the rotatable base 6. thus maintaining at all times the same distance between the driving ed es of the non-rotatable pulley and the inc ined pulley and keeping the tension of the flexible connection constant. The shorter or rearward portion 0 of the radial swinging arm 0. is hole n. which is used by insert his pencil or wand operating the device.

It will be obvious that the wire 0. representing the dip er and polar star is rigidly secured to t e upper extension of the inclined axis h. and revolveswith it, as shown in Fig. 3. The wire p. shown in the drawing,

the instructor to when desirous of provided with a loop or taneously movements to the sphere s. and

the inclined axis it. thus illustrating the rotating and revolving movements of the earth around the sun, and the different positions of the inclined axis with regard to the sun, and at the same time maintaining the arallelism of the axis at all stages of revo ution. It will also illustrate the exact location of any antipodes the instructor may Fig. 3, supporting the sphere representing wish to point out.

the moon, is wound around the inchned axis h. loosely but its free end is secured to the sphere s. thus moving. with it; but the c nstruction shown is not intended to show the degree of movement of the moon but to show its relative position to the earth. The upper surface of the base a. is divided into four equal parts representing the four seasons of the year. The longer portion of the radial swinging arm 0. lies directly over the section or division marked winter which indicates the starting point from which the radial swingin arm travels in the direction indicated by t e arrow towards the spring and so on until winter is again reached when the earth shall have made one com.- plete revolution around the sun.

Mode of operation: When the instructor desires to instruct his pu ils in the relative position, of the earth to tile sun, its manner of rotating about its own axis while revolving around the sun; the relative. position of the inclined axis of the earth to the sun at of the tpulley the location of l axis 0" different seasons of the year, t e different antipodes, and various other natural phenomena of the solar system, he will first place his pencil or wand in the loop a. and move the radial swinging arm 0, in the direction indicated by the arrow, thus by means of the flexible connections t and m. respectively imparting a rotary movement a s tata e r d k wi th ulley 7c. the former carr ing the inclinedaxis its attachment wh le the latter carries the sphere re resenting the earth anditsattach; merits. ft will be obvious that all moving parts working in unison will impart simul l l l l J and a globe representing Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. In a tellurian, the combination, consisting of a rotatable base, an inclined axis mounted thereon, a pulley mounted u on the aforesaid axis the center of the pu ley lying in the prolongation of the axis of the rotatable base, and a globe fixedly con nected to the pulley and mounted upon the inclined axis.

2. In a tellurian, the combination, consisting of a fixed base, a swinging arm mounted upon the fixed base, two nonrotatable pulleys and a. ball representing the sun mounted upon the. axis of the arm, a rotatable. base journaled upon one end of the aforesaid arm, a flexible connection driving the. rotatable base from the lower of two non-rotatab e pulleys, an inclined axis mounted upon the rotatable base, a pulley mounted upon the inclined axis the center lying in the prolongation of the the rotatable base, a crossed flexible connection driving the inclined ulley from the upper of the two non-rotata le. pulle *s,

the earth fixedly connected to the inclined pulley and mounted upon the inclined axis.

Signe a Manhatt n ough, ew Y rk cit in the county of New York and State of ew York this 21 st day of March. A. D. 1908.

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