US497108A

US497108A - Positive-pressure blower

Info

Publication number: US497108A
Authority: US
Publication date: 1893-05-09
Anticipated expiration: 1910-05-09

Description

(No Model.) 4 V 2 Sheets-Sheet 1'.

J. W. WILSON. POSITIVE PRESSURE BLOWER.

No. 497,108. Patented May 9, 1893.

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No. 497,108 Patented May 9, 1893.

IN ENTUR UNITED STATES PATENT Erica.

JOHN W. WVILSON, OF BROOKLYN, NEW YORK.

POSITIVE-PRESSURE BLOWER.

SPECIFICATION forming part of Letters Patent No. 497,108, dated May 9, 1893.

Application filed November 23, 1891. Serial No. 412,888. (No model.

To all whom it may concern:

Be it known that I, J OI-IN W. WILSON, a citi zen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Positive-Pressure Blowers, of which the following is a specification.

My invention consists essentially of wings pivoted in radial slots in the conic side of a rotating piston working in a case having one side oblique to the plane of rotation, and forming a cut-oif abutment at one side and a way for receiving and compressing the air on the opposite side of the axis of the piston, and it also consists of certain details of construction and arrangement of the parts, all as hereinafter fully described reference being made to the accompanying drawings in which- Figure 1, is a central sectional elevation of myimproved blower transversely of the shaft. Fig. 2, is a central sectional elevation in the plane of the shaft. Fig. 3, is ahorizontal section in the plane of the shaft, and Fig. 4:, is an elevation of one of the covers of the case.

In this example of my invention I represent a duplex machine whereof the rim 1, of the case in which the wings I), and the rotating piston 0 work, is faced obliquely to the axis at both sides and the piston is conic on both sides (1, and carries wings I), on each side making two compression ways as e, and two outting-off abutments at f, and this is the preferable form, but it is to be understood that single acting machines utilizing one side only of the piston are alike available. The rim a, has a cylindrical bored section f, the width of the face of the piston c, and it also has the oblique sections 9, bored spherically to the axes of the pivots h, respectively and coincident with the bore of section f, and it has the clearance spaces i, with which inlet and outlet passages j, j, 01' k, k, communicate, and which are separated by the abutment Z. The covers m, consisting of plain flat disks are bolted on the oblique sides of the rim close against the sides of the piston at one side of its axis and form the aforesaid abutments f, and said covers close the ways e, at the opposite side of the axis.

The piston is composed of two cup-shaped parts which are joined by the rims recessed and fitted together one within the other at n,

i and it iucloses a hollow space; each conic side hasa slot 0, extending across it diametrically in which the wings I) are fitted, said wings having one straight edge 19 to run in. close proximity to the plane surface of the cover, while the other edgeproj ects into the hollowspace of the piston and has the curved middle section g, on which a spring .9 bears bya shoe t, to keep the outer edge in close proximity to the surface of the cover, the wings being fitted on their pivots 72, so as to have slightmovement in that direction. The wings vibrate in these slots and thus project in the ways e, to take effect on the air andretire to pass the abutments; the springs 3, might bear directly on the curved parts q, of the wings but it is better to use the shoes -for protection of the springs from wear. Any

approved form of springs may be employed but I represent in this case long flat springs extended across the wings and secured at the ends under hook studs it, within the hollow space of the piston. On each side of the slots there is an inwardly projecting flange o, integralwith the side plate of the piston to atford lateral support for the wings; the slots are produced in the casting, the walls being slightly chambered as shown at the right hand side of Fig. 2, and left hand of Fig. 3, and the chambers are filled each side of the wings with anti-friction metal to, poured in against the sides of the wings first placed in position, as the simplest way of fitting the parts and to provide bearing surfaces that may be renewed from time to time. The shaftszr, are made separately and bolted on the hubs y, of the piston but they may be made integral therewith if desired.

To protect the edges 19 of the blades from wear against the covers I have provided the rings 2', in the central recesses 00', of the covers with removable anti-friction wearing rings 19,

.under them to be renewed from time to time,

and under theseI arrange the disk 0', having the hub cl, perpendicular to them for a central pivot to the revolving ring 2; this disk may also be packed out from time to time as ring 6 wears away through the rotation of ring 2, caused by the friction of the wings bearing against and impelling it forward. I have shown a ring as 2, in my pending application, SerialNo. 343,839,but without the wear- ICO ing ring and pivot disk behind it. The covers m are bored obliquely suitably for the hubs of the piston and faced off at e, outside at right angles to the said bores to receive the shaft boxes g, which are bolted on at h, subject to adjustingscrews i, (Fig. 4) for setting the boxes up as they wear down. It will be seen that the air entering the piston ways at one side or the other according to the direction the piston is turned will be forced out at the other side by the wings which vibrate on their pivots so as to swing out into the piston ways at one side of the axis of the piston-to take effect on the air and retire at the other side to pass the abutments.

I claim 1. The combination of the rotary piston having the diametrically slotted conic side, the wings fitted in said slot and pivoted in the axis of the piston and in the apex of the cone, and the case having the cylindrically bored section for the piston, the spherically bored section for the wings, and the oblique side inclosing the spherically bored section, and with the conic side of the piston forming an abutment at one side of said axis of the piston substantially as described.

2. The combination of the rotary piston having the diametrically slotted conic side, the wings fitted in said slot and pivoted in the axis of the piston, and in the apex of the cone movably lengthwise of said axis, a spring pressing the wings outwardly of the piston, and the case having the cylindrically bored section for the piston; the spherically bored section for the wings, and the oblique side inclosing the spherically bored section, and with the conic side of the piston forming an abutment at one side of the said axis of the piston substantially as described.

3. The combination of the rotary piston having the diametrically slotted conic side, the wings fitted in said slot and pivoted in the axis of the piston and in the apex of the cone movably lengthwise of said axis, and having the curved bearing section within the the wings outward of the piston and the shoe interposed between the spring, and said bearing section substantially as described.

4. The combination of the rotary piston having the diametrically slotted conic side, the wings fitted in the slot and pivoted 1n the axis of the piston and in the apex of the cone movably lengthwise of said axis, the case having the cylindrically bored section for the piston, the spherically bored sect on for the wings and the oblique side inclos ng the spherically bored section, the rotating ring, wearing ring and the disk in the central recess of the side of the case substantially as described.

5. The combination of the rotary piston having two diametrically slotted conic sides, wings fitted in said slots and pivoted in the axis of the piston and in the apexes of the cones, and the case having the cylindrically bored section for the piston, two spherically bored sections for the wings, and two oblique sides inclosin g the spherically bored sections, and with the conic sides forming abutm'ents at one side of said axis of the piston substantially as described.

6. The combination of the hollow rotary piston consisting of two cup-shaped parts fitted together at the edges and having two diametrically slotted conic sides with the slots at right angles to each other or thereabout, wings fitted in said slots and pivoted in the apexes of the cone, springs within the hollow piston forcing the wings outwardly, and the case having the cylindrically bored section for the piston, two spherically bored sections for the wings and two oblique sides inclosing the spherically bored sections, and with conic sides of the piston forming abutments at one side of the axis of the piston substantially as described.

Signed at New York, in the county of New York and State of New York, this 1st day of October, A. D, 1891.

JOHN V. WVILSON.

Witnesses:

W. J. MORGAN, W. B. EARLL.