US25368A - powell - Google Patents

Description

similar number of cog wheels of dierent UNrTEn sTATEs PATENT oEEroE JNO. B. POWELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND G. B.

FRICK, OF SAME PLACE.

AUTOMATIC FAN.

Specification of Letters Patent No.

To all whom it may concern:

Be it known that I, JOHN B. POWELL, of the city and county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement 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 drawing and to the letters of reference marked thereon.

My invention consists in a spindle with any convenient number of cog wheels of diii'erent diameters, in combination with a diameters on a spindle, with a crank connected to the vane of the fan the first spindle being rendered adjustable and applied to and combined with the works of an automatic fan substantially in the manner described hereafter so that the vane of the fan may be agitated by a faster or slower speed at pleasure by the adjustment of the said spindle.

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 drawing which forms a part of this specification, Figure l is a front view of an automatic fan with my improvements. Fig. 2 a side view. Fig. 3, a detached view of the change gear.

Similar letters refer to similar parts throughout the several views.

A is a stand which may be constructed in the manner illustrated or in any other form which the situation occupied by the fan suggests as the most appropriate. To a platform a on this stand are secured the two plates B and B in which turns the spindle C, operated by a coiled spring D, a wheel E, on this spindle gearing into a pinion F on the spindle G, which has a wheel H gearing into a pinion I on the spindle J, the latter having a wheel K, gearing into a pinion L, on the spindle M. The latter spindle has a iiy wheel Q and two cog wheels N and P, the former-being larger in diameter than the latter. A slight longitudinal movement is allowed to the spindle M in its bearings in the plates B and B', the longitudinal motion of the spindle being controlled by the lever It, which has its fulcrum on a stud z' 25,368, dated September 6, 1859.

on the plate B, the point of the lever fitting between two collars j, on the spindle so that the latter may be moved backward and forward by the movement of the lever.

Above the spindle M is another spindle S turning in the plates B and B', and furnished with two cog wheels T and U, the former being arranged to gear into the cog wheel N and the wheel U to gear into the cog-wheel P, both sets of wheels however are never in gear at the same time, but by operating the lever R the wheel P may be thrown into gear with the wheel U, or the wheel N into gear with the wheel T at pleasure. On the end of the spindle S is a crank m the pin of which is connected by a rod n to an arm p on the spindle g which vibrates in hangers t secured to an arm /v projecting from the frame, the vane W of the fan being secured to this spindle g.

The spring being wound up motion will be communicated by the train of wheels above described, to the fly wheel shaft M, and either through the wheels N and T, or the wheels P and U, (if the latter pair instead of the former be arranged to gear into each other) to the spindles the revolution of which will impart through the crank 'm and connecting rod n a vibrating motion to the vane w. When a moderate agitation of the air by this vane is required the shaft M is slid by the lever R until the smallest wheel P gears into the largest wheel U, as shown in Fig. l, when the speed of the spindle S will necessarily be less than that of the shaft M. When a more rapid agitation of the air is required the spindle N is slid out until the two last mentioned wheels are out of gear with each other and until the larger wheel N on the spindle M gears into the smaller wheel T on the spindles S when the latter will revolve more rapidly and communicate the required rapid motion to the vane W.

I wish it to be understood that I lay no claim to a fan operated by clock work or to the application of a balance wheel to the works of an automatic fan; but that I limit my claim to and desire to procure Letters Patent for- The spindle M, with any convenient number of cog wheels of different sizes, in com- Wheels also of different sizes on the crank name to this specification in the presence of bination with a similar number of cog In testimony whereof I have signed my Spindle S, when the said spindle and its i two subscribing Witnesses.

Wheels are rendered adjustable, and are ap- JOHN B. POWELL. plied to, and combined With the Works Witnesses:

of an automatic fan substantially as and HENRY HoWsoN,

for the purpose herein set forth. CHARLES D. FREEMAN.

Images