US1194605A - dickerson - Google Patents

Description

E. E. DICKERSQN.

FAN.

I APPLICATION FILEDJUNE|21 1915. l 1 94,505 Patented Aug. 15, 1916.

2 SHEETS-SHEET 2.

INVENTOR 3 A TTOR/VE 7 UNIT TATE PATENT @FFTCE.

EUSTICE E. DICKERSON, OF FORT WORTH, TEXAS.

FAN.

Application filed June 12, 1915.

To all whom it may concern:

Be it known that I, EUSTICE E. DIGKER- SON, a citizen of the United States, residing at Fort lVorth, in the county of Tarrant and State of Texas, have invented certain new and useful Improvements in Fans, of which the following is a specification.

My invention has relation to a fan or blower for the conveyance of materials such as cotton, cotton seed, saw dust or the like, partly under suction and partly under air pressure, from a source of supply to a point where the materials are to be delivered and in such connection it relates more particularly in the construction and arrangement of the parts of the fan or blower structure whereby the travel of the material is continuous being drawn under suction from and delivered to the objective points under pressure of air without the material coming in contact with the blades 'of the fan or blower.

Heretofore in the transportation of materials partly under'suction and partly under pressure, where but one fan or blower instrumentality was used, the materials came in direct contact with the blades of the fan. The obvious disadvantage of such a construction in the handling of cotton, for instance, has heretofore prevented the use of a single fan or blower and so far as I am aware a plurality of vacuum orair, pressure creating means is universally employed in the transportation of such materials where the material is to be received under suction and tobe delivered either under suction or air pres sure.

The main object of my present invention is to provide a single fan or blower arranged to draw the materials by suction from one point and to deliver the same under air pressure to another point, the material at no point of its travel coming into contact withv the fan or blower blades.

In carrying out my invention there are provided certain parts or instrumentalities namely,first, a chamber into which the cot ton is received and which may be called a from the fan or blower. Second, a central.

Specification of Letters Patent.

Patented Aug. 15, 319116.

Serial No. 33,669.

chamber wherein the fan or blower revolves,

said central chamber being separated from the air pressure chamber through which the materials pass by a screen wall surrounding substantially the entire periphery of the fan or blower, the said central chamber provided with an outlet tangential to the periphery of the fan or blower leading to the outlet pipe of the fan. The fan or blower thus has communication through one side with a suctlon compartment separated by screen partition from the suction pipe or compartment through which the materials are to travel and the fan or blower has communication through a screened wall inclosing the periphery of the fan with air pressure through which or a portion of which the material travels, the air pressure chamber having an inlet from the suction pipe or chamber through which the material travels and an outlet into the pipe leading from the fan.

The nature and scope of my invention will be more fully understood from the following description taken in connection with the accompanying drawings forming part hereof, in which,-

Figure 1, is a side elevational view partly broken away of a fan or blower embodying main features of my invention. Fig. 2, is a cross-sectional view taken on line a, a of Fig. 1. Fig. 3, is a longitudinal sectional view taken on line b, 7) of Fig. 2. Fig. 4;, is a view corresponding to Fig. 1 but illustrating a modified form of the invention. Fig. 5, is a cross-sectional view taken on line 0, c of Fig. 4. Fig. 6, is a longitudinal sectional view taken on line (Z, (Z of Fig. 5, and Fig. 7, is a view corresponding to Fig. 5 but illustrating a still further modified form of the invention.

Referring to the drawings and particu larly to Figs. 1 to 3, the shell or casing for the fan and blower mechanism consists essentially of three parts, a main, substantially cylindrical body 1 wherein the fan or blower is designed to rotate, a suction chamber 2 communicating with the fan chamber at the center of the fan and an outlet or discharge chamber comprising a duct 3 projecting tangentially or taking off peripherally from the body 1 in which the fan revolves. The main chamber or casing 1 is divided into two chambers Or compartments by a screen partition 4 which is arranged slightly eccentric to the periphery of the fan and with a horizontal portion 5 extending parallel with the outer wall of duct 3. The portion 5 of the screen partition thus divides the duct 3 into two passage ways of which the upper is preferably larger in cross-sectional area and the lower forms the open terminus G for the receiving and discharging air pressure chamber 7 of the fan.

The suction chamber 2 is divided into two compartments 8 and 9 by a partition 10. The compartment 8 is in open communication with the side of the fan chamber 1, the opening from compartment 8 to chamber 1 being so arranged as to take in all the suction area at the side of the fan. The par tition 10 is partly solid for a portion of its length and partly perforated. The solid portion is vertically disposed as at 1O parallel to the sides of the fan and the perforated portion 10" is downwardly inclined and curved or bellied and extends from the vertical portion 10' to the edge of the screen partition 4.

The outer wall 11 of the chamber 2 is solid and is downwardly inclined as at 11" to form with portion 10 of partition 10 a hopper in the top of said chamber into which the material from a pipe 12 is dropped, said hopper having imperforate sides and a contracted lower end. The remainder of the outer wall of chamber 2 is first inwardly curved or bellied as at 11 and then outwardly bellied or curved as at 11 and joined to the outer portion of main casing 1.

The portion 9 of chamber 2 for the conveying of material by suction is thus divided into a hopper having a contracted outlet at a point where suction through perforated portion 10 begins, and an expanded chamber or room at the base under the full suction of the fan terminating in a contracted inlet 2 to the pressure chamber 7 of the fan.

The fan itself consists of a series of blades 13 projecting radially from a spider 1- keyed or otherwise secured to a shaft 15 traversing the casing 1 and extending beyond the imperforate side wall 1 thereof into bearings 16. The shaft is rotated by means of pulley 17 to which power is transmitted in any suitable way.

In Figs. l, 5 and 6 a modified form of the fan is illustrated where the pipe or duct 12 enters the side of the suction chamber rather than at the top, as does pipe 12 in Figs. 1, 2 and 3. This change in the inlet to chamber 2 necessitates a change in form and arrangement but not of principle in the suction chamber. In this form the chamber 2 is of lozenge or diamond shape in cross section and is divided into chambers 8 and 9* by a perforated partition 20 traversing the chamber 2 diagonally from the upper right hand corner to a point where it joins the partition 4: of the fan chamber. In Fig. 7 a still further modified form of suction chamber for use with a horizontal supply pipe 12 is shown. In this form the partition 30 is perforated and extends horizontally from a point opposite the axis of fan shaft 15 to the front or right hand wall of the chamber 2 to a point a little below the top of the enlarged inlet 12 from pipe 12". The lower compartment 9 thus formed, is divided into two by an imperforate plate 31 stitutes a passageway for the material under suction from the inlet pipe to the pressure chamber 7 of the fan. The material is discharged into this pressure chamber 7 and is blown tangentially of the fan through the. terminus 6 to the discharge pipe 32.

The material is thus drawn into the fan and forced under pressure of air therefrom without coming into direct contact with or proximity to the fan blades, and the material is not forced to travel entirely through the fan chamber but only tangentially through a portion thereof.

Having thus described the nature and objects of my invention what I claim as new and desire to secure by Letters Patent, is,-

1. In a combined fan and blower, a main casing for the fan, a suction chamber communicating with the side of said casing and an outlet leading from the main casing tangentially to the periphery of the fan blades, a screen partition arranged within the main casing eccentric to the fan and dividing the main easing into a fan chamber and an air pressure chamber, said partition projecting through the tangential outlet to divide the same into two ducts whereof one forms the terminus for the air pressure chamber, a partition dividing the suction chamber into two compartments, said partition being perforated for a portion of its length, one of the compartments forming a passageway for the cotton under suction and delivering the same to the terminus of the air pressure chamber.

2. In a combined fan and blower, a fan casing having a suction inlet at one side, a perforated partition eccentrically arranged within said casing and dividing the same into two eccentric chambers, the outer of which forms an air pressure chamber separated from the fan by the partition, and a suction chamber arranged at right angles to the pressure chamber and to the suction inlet to the fan, combined with means for dividing the suction chamber into two compartments, said means being perforated to bring the compartment farthest from the fan under suction, said farthest compartment discharging at right angles into the pressure chamber of the fan.

3. In a fan or blower, a main chamber divided into a fan and a pressure chamber separated by a screen partition, a suction chamber divided into two compartments by a screen partition, one of said compartments being in open communication with the fan chamber and the other constituting the suc- &

tion passage way for the material, said passageway discharging directly into the pressure chamber, and an outlet projecting tangentially from the main chamber and divided by a perforated partition into two ducts, whereof one forms the terminus for the air pressure chamber.

In testimony whereof I have signed my name to this specification.

EUSTICE E. DICKERSON.

Copies of this patent may be obtained for five: cents each, by addressing the Commissioner of Patents, Washington, D. G.

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