US347255A

US347255A - Half to chas

Info

Publication number: US347255A
Authority: US
Publication date: 1886-08-10
Anticipated expiration: 1903-08-10

Description

7 (No Model.)

D. WQPORTER.

AUTOMATIC FAN.

Patented Aug. 10, 1886.

N PETERS. PhOIO- WKW Washing, D. Q

UNITED STATES:

PATENT Fries.

DAVID W. PORTER, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO CHAS. PRILL, OF SAME PLACE.

AUTOMATIQ FAN.

SPECIFICATION forming part of Letters Patent No. 347.255, dated August 10, 1886.

(No model.)

foaZlwhom it may concern..-

Be it known that 1, DAVID W. PORTER, of Pi ttsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvementsin Motors for Fans; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being bad to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in motors for fans; and it consists in the combination of an air-pump or other suitable compressor, a tank into which the air is pressed,

a cylinder, a piston and piston-rod placed l motor for a fan, which, together with the fan,

can be moved freely around from one place to another, the fan adjusted into any desired position, and then set in motion.

Figure 1 is a side elevation, partly in section, of a motor embodying my invention. Fig. 2 is a vertical cross-section taken at right angles to Fig. 1. Fig. 3 is a horizontal sec tion taken through the top of the base. Fig. 4 is an edge view of the spring and its attachments.

A represents a suitable frame-work of any kind, and which is mounted upon rollers B, so as to be moved, readily from one place to another. Mounted upon the top of this framework B are the two pillars or uprights O, of any length, and which have the shaft D extending across and uniting them together at their upper ends. Upon this shaft D are placed the two arms F, in which the fan F is journaled at their outer ends. 7, The fan F is adjusted vertically by means of the slotted arm G, which is held in any desired position by means of a set-screw or other similar device, which will hold the arm in any position in which. it may be adjusted.

In the base A is placed an air-pump, H, which is operated by the lever I, which projects through the top of the frame. The air passes from the pump I through the pipe J into the reservoir L, where it can be compressed to any desired degree. Leading from this reservoir L to the bottom of the cylinder N is a pipe,'0, which is provided with astopcock, P. TIn this cylinder N is placed a tightly-fitting piston, Q, to which the rod R is connected, and which rod extends up through the top of the pillar or post 0. To the bottom of the cylinder is' connected a stop-cock, S by means of which the air in the cylinder below the piston can be discharged after the stopcock in the pipe 0 has been closed, so as to shut-off communication between the cylinder N and the reservoir L. When the stop-cock S is closed and the one, P, is open the compressed air passes into the bottom of the cylinder N and forces the piston Qand rod R upward. Fastened to this rod R, above the top of the cylinder, is a suitable projection,*T, of any kind, and to this projection T is fastened a cord, U, which extends down and passes around aIdrum or pulley, V, inside of which is placed a spring and ratchet. This ratchet and dog'W engage, so as to hold the spring at any desired point. As the piston Q and rod R move upward, the cord U causes the drum V to revolve, and in revolving the spring is wound up. After the piston has been moved as high as it will move in the cylinder the cock P is closed and the one, S, is opened, so as to dischargethe air from the cylinder, and then this-spring draws the piston down to the bottom of the cylinder again, where it is again ready to be operated upon by the compressed air.

Journaled horizontally in the base A are the two shafts X, upon which are arranged, alternatel y, a series of large and small driving-pulleys, the small pulleys being placed opposite and geared to the large ones for the purpose of multiplying speed. Bands, belts, wires, or cords are used to connect these pulleys together and impart the motion which is connected to the first large pulley, next to the spring-actuated drum, successively to the others, which are placed loosely on their shafts. The firstlarge pulley moves veryslowly,but the last one of the small pulleys, from which the belt Y passes, moves very rapidly. The belt Y passes up through one of the hollow standards and around a pulley which is placed upon the driving-shaft 1). Upon this shaft l) is placed a pulley, Z, from which passes the driving-belt 1 around the pulley 2 on the fanshaft. \Vhen the stop-cock I is opened, so as to admit air to the bottom of the cylinder N, the whole train of pulleys is at once set in motion, and the fan is driven very rapidly, so as to create a current of air. When the stopcock P is closed, the fan at once stops. The pulleys, being placed loosely upon the shaft X, are not cll'eelied by the reverse movement of the drum V.

Having thus described my invention, I claim The combinationofan air-compressor, a reservoir for the compressed air, a pipe for conneeting the reservoir and cylinder, the piston placed in the cylinder, a projection on the piston-rod, a spring-drum placed upon one of the shafts and connected to the projection on the pis on-rod, the two shafts upon which the drivi ng-p ulleys are placed, the driving-pulleys connected together, the standards, the drivingshaft journaled in the standards, the arms projecting from the standards and between which the fan is journaled, the fan, and the operating-belt for driving the fan, substantially as shown.

In testimony whereof I affix my signature in presence of two witnesses.

DAVI D XV. TOFFEE. \Yilncsses:

.TnNNIn Kama, EMMA A. MoGINNIs.