US206129A - Improvement in fan-blowers - Google Patents

Description

I. M. PHELPS.

Pan-Blower.

No. 206,129. Patented July 16., I878,

N PETERS. PHOTO-LITHDGRAPHER. WASHINGTON, D C.

UNITED STATES PATENT OFFICE.

IRA M. PHELPS, OF PHILADELPHIA,

PENNSYLVANIA, ASSIGNOR OF ONE- HALF HIS RIGHT TO JOHN SHILLITO, JR, OF SAME PLACE.

IMPROVEMENT lN FAN-BLOWERS.

Specification forming part of Letters Patent No. 206,129, dated July 16, 1878; application filed April 16, 1878.

To all whom it may concern:

Be it known that I, IRA M. PHELPS, of Philadelphia, Pennsylvania, have invented a new and useful Improvement in Fan-Blowers, of which the following is a specification:

The object of my invention is to construct a fan-blower which will impart a greater pressure to the air than those in common use, and this object I attain in the following manner, reference being-had to the accompanying drawing, in which Figure 1 is a longitudinal vertical section of my improved fan-blower; Fig. 2, a sectional plan 011 the line 1 2, and Fig. 3 an enlarged View of part of the device.

The casing A of the blower is of the usual form, and has a discharge-nozzle, b, at the base, and in one side a central inlet-opening, to which, in the present instance, is tightly fitted a funnel, a. Within the casing A is arrangeda wheel, B, the shaft d of which is adapted to a bearing, e, in the back of the casing, and this wheel B has hollow arms f, (three in the present instance,) which communicate with the hollow hub 2' of the wheel, the said hub being open at one side, so as to receive the inner end of the funnel a, which projects beyond the inside of the casing A, so as to form an annular flange, m.

The opening in the hub i is somewhat larger in diameter than the said flange 112, so that an annular space, a, intervenes between the two, as shown more fully in Fig. 3.

On the front of each of the arms f is a blade, 10, which, in the present instance, projects beyond the sides of the arm, and also beyond the end of the same, as shown in Figs. 1 and 2.

then the wheel B is revolved rapidly in the directions of the arrows 1, air will enter the hollow hub i through the funnel a, and this air will pass through the hollow arms f with a force due partly to centrifugal action, and partly to the partial vacuum existing immediately in the rear of the projecting portions of the rapidly-moving blades 20.

The air which thus enters the casin g is acted upon by the succeeding blade, and is thereby forcibly driven out through the dischargenozzle b.

By means of the hollow arms f the air is at once conveyed to a point where it is directly in the path of the blades, so that the full blowing or fanning effect of the latter is utilized.

As the funnel a fits tightly in the opening in the casing A, all leakage of air at the inlet is prevented, any air which passes between the outer face of the wheel B and the casing A being directed by the projecting flange m of the funnel a into the hub i through the an nular space a, so that it does not interfere with the free inlet of air through the openmg a.

By allowing the space a to intervene between the edge of the opening in the hub of the wheel B and the funnel a, I overcome the friction which would be caused by a contact of these two surfaces.

The blades to need not in every case project beyond the ends of the arms f, nor even beyond the sides of the same-for instance, the arms might be made of such a width that they would themselves form blades without any addition. The form shown, however, is preferred.

I claim as my invention- 1. The combination of the casing A,ha\'ing an inlet and outlet, with the wheel B, having a hollow hub, i, and hollow arms j, which afford communication between the hollow hub and the interior of the casing, and the fronts of which form or carry tanning-blades, all substantially as set forth.

2. The combination of the wheel B and its hollow arms f, open at the outer ends, with blades 10, projecting beyond the ends of the arms, as specified.

3. The combination of the wheel B, having a hollow hub, '2', the casing A, and the annular flange at around the inlet-opening, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

IRA M. PHELPS.

\Vitnesses:

HARRY A. CRAWFORD, HARRY SMITH.

Images