US44553A - Improved automatic fan - Google Patents

Description

UNITED STATES ATnN l FFICE IMPROVED AUTOMATIC FAN.

Specification forming part of Letters Patent No. dd, dated CcJobcr 4, 1864.

To @ZZ whom it may concern:

Be it known that I, JOHN B. POWELL, of Philadelphia, Pennsylvania, have invented certain new and useful Improvements in Automatic Fans, and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates toimprovements, fully described hereinafter, in the automatic fan for which Letters Patent were granted to me on 6th day of September, A. D. 1859; and my improvements consist in placing the spring for operating the fan in the base of the implement and connecting the fan itself to a pilla-r rendered adjustable in a column attached to the base, motion being communicated to the fan from the spring through the medium of such devices that the said fan can be adjusted both laterally and vertically without any interruption of its free movements.

My improvements have the further advantage of rendering the instrument portable and steady, as well as more neat and manageable, th an th at described in my aforesaid patent.

In order to enable others to make and use my invention, I will now proceed to describe its construction and operation.

On reference to the accompanying drawings, which form a part of this specification, Figure 1 is a side view, partly in section, of an automatic fan with my improvements; Fig. 2, an end view of a portion of Fig. 1, looking in the direction of the arrow; and Fig. 3, a sectional plan on the line 1 2, Fig. 1, drawn to an enlarged scale.

Similar letters refer to similar parts throughout the several views.

A is the base of the instrument, and consists of a hollow boX, containing a coiled spring similar to that of an ordinary clock, or to that described in my patent of September 6, 1859, any suitable system of gearing being used for transmitting the motion of the spring to the vertical shaft B, which turns at the bottom in a plate, a, secured to the inside of the box. This shaft B passes upward through the column G, which is secured to or forms a part of the base, and into a tube, D, the upper and lower ends of which are arranged to turn freely inthe external tube, E, but can have no vertical or lateral movement independent of the latter tube, which iits snugly, but so as to slide freely, in the upper end of the pillar (l, the latter being provided with a set-screw, e, by mfans of which thetube E and its adjuncts may be secured after adjustment. It should be understood that the shaft B and the interior of the tube D are square or of such other form that while the tube can slide vertically on the shaft one cannot turn independently of the other. On the upper end of the tube. E is a platform, F, supporting two plates, G and G', between which is a system of gearing similar to that described in my patent of September 6, 1859, this gearing being driven by the wheel H, which is secured to a spindle attached to the upper end of the tube D. Frein the plate G" projects an arm, I, and beneath the latter is a shaft, J, arranged to vibrate at one end in the said plate G and at the opposite end in a projection on the arm I, the fan K being secured to the arm J, on which is a short arm, connected by a rod, m, to the crank n on the spindle q, as in my aforesaid patent.

Thelever M, which projects through an opening on one side of the base, is for the purpose of winding up the spring which produces the motive power. As this lever and its appliances and the mode of operation are fully described in the patentfora device for winding up clocks, Sac., granted to me on the 2d day of August, 1859, further description will be unnecessary. In my patent for improvements in automatic fans, granted September 6, 1859, the spring and gearing were placed in close contiguity with eachother, and on the top of acolumn, near the fan, which rendered the apparatus somewhat clumsy and unsteady. This is avoided in my present improvements by placing the spring', with its appliances, (forming the heaviest portion of the machine,) within the base A, which thus forms a weighted and firm foundation for the entire instrument. As the tube E can be turned as well as raised and lowered in the column C, and as the internal tube, D, can slide freely on the shaft B, it will be evident that the fan can be raised or lowered or turned to any desired position laterally without its movement being interrupted.

I wish it to be understood that I do not desire to confine myself to any particular construction or arrangement of parts constituting the driving-gear situated within the base A, nor to any specific system of gearing for imparting a vibrating motion tothe fan from the tubeD; but

I claim as my invention and desire to secure by Letters Patent- 1. ThebaseA, containing thedriving-spring, the column C, and adjustable tube E, carrying the fan K, in combination with the devices herein described, or their equivalents, for transmitting motion from the spring in the base to the fan Without interfering with the ready vertical and lateral adjustment of the latter, as set forth.

2. The internal tube, D, and external tube, E, (the lattercarryingthe fan K,) and anysuitrcombination with the column C and shaft B,

the Whole being constructed and arranged substantially as and for the purpose herein set forth.

In testimony whereof I have signed my naine to this specication in the presence of two subscribing Witnesses.

JOHN B. PO\VELL.

Witnesses J. MAsoN BUnNs, WM. S. PoULsoN.

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