US1756343A

US1756343A - Means for moving air against pressure

Info

Publication number: US1756343A
Application number: US225137A
Authority: US
Inventors: Charavay Frederick
Original assignee: HARTZELL INDUSTRIES
Current assignee: HARTZELL INDUSTRIES; HARTZELL INDUSTRIES Inc
Priority date: 1927-10-10
Filing date: 1927-10-10
Publication date: 1930-04-29
Anticipated expiration: 1947-04-29

Description

April 29, 1930. CHARAVAY' 1,756,343

MEANS FOR MOVING AIR AGAINST PRESSURE Fagledl oct. 10, 1927 Patented A131229 1.93.0 ,A

UNITEn sTATEs ENT OFFICE FREDERICK CHABAVAY, OF PIQUA, OHIO, ASSIGNOB, BY M'ESNE ASSIGNMENTS, OF ONE- HALF T HARTZELL INDUSTRIES, INC., OF WILMINGTON, DELAWARE, A CORPORA- against pressure,

TION 0F DELAWARE uEANsronMovING am ,AGAINST raEssUB-E Application led October 10, 1927. Serial No. 225,137. i

This invention 'relates to new and useful improvements -in means for moving air against pressure. It is the principal object of my invention to provide for mine, building and other duct service, where lit is necessary to move a1r a motor Iunit upon whose shaft there is mounted a multiplicity of blower blades, one behind theother. In this assembly each vblade adds its work to the others, with the -result that substantially 11000 cubic feet of air a minute may be moved by a one and al half horse power motor against a one and a half inch of water pressure.

It is another vobject of my invention to provide f suitable means for securing the 4blower unit within a metal tube or shell through which air is to be Vmoved against pressure.

Other important and incidental objecfts will be brought out in theffollowing specification and particularly set forth in the subjoined claims.

In the accompanying drawings illustrating my invention, Figure 1 is a longitudinal, sectional view taken through a metal tube showing my air .moving unit secured therein. Figure 2 is an end view of said tube, showing said blower unit lmounted therein. Figure 3 is an elevational view of one Aof the airl moving blades. And Figure 4 is a detail view Y of a portion of one of the eye bolts for se- 4 curing the motor unit within the tube.

Referring to the accompanying drawings for a detailed description of my invention, the numeral 1 designates a metal' tube or shell through which air is to be moved. For the purpose of moving air through this tube against pressure', Iaxially secure therein by to be described an electric motor 2 means whose armature shaft projects T froml both ends ofi it.l Upon each end of the armature shaft 3 al series of blades 4,*preferab1y of aerofoil" action,.are mounted. These blades maybe staggeredas shown inf the drawings-, butare disposedone behind the other,fso that each blade may add its power to that ofthe tube conveyingtli@y ai?, f0.1 T215?? the. number of `blades used.

In order that each blade may fit the shaft 3 snugly, it is split on each side of its central hole 5, as shown in Figure 3. On each side of the hole 5, the blade is formed with'a bolt hole to receive a bolt 6. Nuts 7 are applied to the threaded ends of these bolts to draw the split portions of the blade snu ly against the shaft 3 to which lit is applie In order to true the bladep'roperly to the shaft 3, it is only necessary to ream the hole 5 to the desired angle.

For the purpose of securing the motor 2 firmly within the tube 1, I provide the following means. Projecting through the end plates 8, 8 of the motor are studs 9. UponA each end of the studs 9 is a washer 10, and between'this washer and a nut 11 the eye portion of an eye bolt12 is secured to the stud. These eye bolts 12` project radially from the studs 9 through holes in the metal shell, and also through holes in crescent-shaped clamping members 13, whose inner surfaces conform to the periphery of the shell. To the outer threaded ends of the bolts 12, nuts 14 arev applied, the crescent-shaped members 13 serving to prevent the shell being pressed out of shape or distorted when the nuts 14 are tightened. i The bearings/of the motor 2 receive oil through radial tubes 15 which project to them from the exterior of the' shell. l

A radial tube 16 is provided for .the cable 17, which conducts the electric current to the motor 2, as shown in Figures 1 and 2.

When the motor is rotated by this current, it will turn the shaft 3 to rotate the blads 4. These blades being in multiple and disposed one behind the other, will move a larger amount of air through the tube'than would' be possible with one blade, since each blade adds its power to that of the others. There is thus maintained a uniform pressure, so that a large amount of air may be moved through the shell for mine, building or like l service. This pressureis in proportion to I Having described-[my invention, I claim; 1. .An axial flow fanicomprislng a circular casin ,gamotor having an armature, mounted l i 1.0.0

.riberas-ee .shaft .f iid www.

projecting from both ends of said motor, a plurality of airfoil propellers mounted in balanced staggered relation on each end of said shaft.

2. An axial How fan comprising a circu- A lar casing, a source of power mounted in said casing, having a power shaft, a. set of airfoil propellers mounted on said shaft at each end in balanced staggered relation, and bearings o for said shaft intermediate said sets of propellets. Y

In testimony whereof I have hereunto set my hand this 7th day of October, 1927.

FREDERICK CHARAVAY.