US61459A - peters - Google Patents

Description

@with faire atnt @fitta SMITH E. Gr. RAIVSON, 0F SARATOGA SPRINGS, NEWT YORK. Letters Patent o. 61,459,`dateti January 22, 1867.

IMPROVEMENT IN GLOBE CLOCKS.

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Be it known thatV I, Su'ITlI E. G. RAWSON, of Saratoga Springs, in the county of Saratoga, and State of New York, have invented a new and improved Globe Clock; and I do hereby declare that the following is afull, clear, and exact description thereof, reference being had to the accompanyingl drawings, making a part of this specification, in which- Figure 1, sheet 1, is a diametrical section through the globe clock, taken in a vertical planegthrough the axis of the globe. I

Figure 2, sheet 1, is a vertical section taken in a. plane through the globe and its supports at right angles to the plane of the section of fig. 1.

I Figure 3, sheet 2, is a front elevation of the improved globe clock complete.

Similar letters of reference indicate corresponding parts in the several figures. This invention relatesto aglobe'time-piecev for giving the difference of time in places of different degrees of longitude,` or the difference of time between any place on the globe and the place where the clock is used,

said globe being so constructed that the mechanism for moving it one revolution in twenty-four hours is contained within it, out of sight and out of the way, thus leaving nothing exposed outside of the globe but the dial-plate andpointers and the pedestal support for the instrument, as will be hereinafter described.

Hitherto globe clocks have been constructed for indicating the time when the sun culminates for any place ron the globe,ia.nd also the ditference of time between different localities, but in such time-pieces the mechanism for moving the globes is located outside thereof, and the globes are thus rendered unwieldy and cannot be adjusted and used as ordinary globes for instruction To enable others skilled in the art to understatid my invention, I will proceed to describe its construction and operation. Y l

In the accompanying drawings, A represents a. terrestrial globe, which is constructed hollow for the purpose of receiving the clock mechanism. This globe A is mounted upon a hollow shaft, B, which passes through it and projects from its poles a suitable distance to enter bearings which are formed on the upper extremities of a semicircular support, C, which may be concentric to the centre of the gldbe, as shown in fig. 1, sheet 1. This semicircular support is passed through a. box, a, formed on the upper end cfa vertical spindle, b, and by means of the rack c and pinion cythis support C, together with its appendages, may be adjusted and set at any desired inclination. The stem of the pinion passes transversely through said box, and has a thumb-button, c'f', axed to'one end, as clearly shownin figs. 2 and 3. 'The spindle benters a standard or pedestal, D, and may be susf tained upon a step at e, so that the lglobe may be rotated about a vertical axis. The globe A'is constructed of two hemispherical sections, divided at-theequ'ator, as shown in g. 1, and attached together by a sliding-latch or-otherwise. The clock mechanism, whicl is sustained by the, hollow shaft B, may be made in any ofthe well known ways which will give one revolution in twenty-four hours. The clock-work which I have represented in the drawings is an ordinary marine clock, having its main-spring shaft,f, coinciding with the axis of thehollow shaft B, about which the lobe revolves. This arrangement brings the axis of the spring shaft f in. such a position that the spring can be wound up by means of a key introduced into one end of the said hollow shaft. The movementis communicated to the globe from the clock-work by means of a pinion-wheel, g, which is attached to a tube, g, upon the day-wheel shaft 7L, by means of a friction cla-mp. This wheel g engages with the teeth of a wheel, j, which is rigidly affixed to one hemisphere of the globe and within the latter, as shown in iig. 1. In this Way the globe is revolved around the fixed shaft B once in twenty-four hours. By attaching the piniona wheelg to its tubular arbor; gf, by means of friction clamps, as above stated, the globe may be turned about its/axis by hand, in either di1 ection,-without in any manner deanging the clock-work, and without stopping the clock. The globe A is kept in gearwith the clock-work by means of two collars 2'z`,'which are aiiixed at its poles to the shaft B, by means of setscrews, as shown ing. 1, The index hand Ic, which is fixed rigidly to the upper end of the support C, as shown in figs. 1 and 3, points to a dial upon the globe, and indicates the time a* places upon di'erent degrees of longitude, or the difference of the time bet'ween any place on the globeand tue place where the clock is used. The-local time is indicated upon a. meridian ring, G, which is sustained upon-the upper end of the box a, and which is stationary with respect to the globe. This ring has the twenty-four hours marked oi upon it, running from the upper half of the meridian on each side cfa vertical line passing through the diameter of this ring, as shown in gs'. 2 and 3. The index for pointing outlocal time upon the meridian ring is applied to the globe, may be constructed as follows: n n are two index handsarranged on each side of the ring Gr, and applied to a curvedrold, '10,' in such mannerA that both indices can be moved up to or from the said ring, so as to admit of the detachment of' the ring from the globe or thesection of the globe from the ring or from eaolother:

Having thus described onemode of arranging clock-Work Within a movable globe, so that the. globe shall be revolved once in twentyfour hours, I do not confine my invention to 'thisv particular mode, as it is evident that the clock mechanism can be, arrangedv and'applied in a variety of ways so as to effect the desired result.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. Providing for the winding up of avglobe clock through an aperture in tle axle` or shaft of rotation of the globe within which the. clock is contained.

2. Having, the winding-up `shaft of a globe clock coincident with the axis of rotation of the globejvithin which the clock mechanis'n'i' is contained. l

3. 'Sustaining a 'globe clock upon anA adjustable support, C, or its, equivalent, substantially as described.

4. Supporting a globe clock, by means of av vertical spindle, upon a pedestal, i'n such manner that the globe can be rotated about a vertical axis, substantially as described. v

5'. The combination of a fixed index, 7c', and movable index, n, with a globe vwhich is rotated automatically, substantially las described. A

6. Sustaining a globe, ivhich is rotated by means of clock-work, uponl a tubular shaft in such manner' that the clock spring can be woundup without 'detaching the sections of ytlie globe, substantially as describe@A s. E. e. RAwjsoN,

Witnesses:

R. T. CAMPBELL, EDW. Sonnen.

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