US872307A - Propeller or fan. - Google Patents

Propeller or fan. Download PDF

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Publication number
US872307A
US872307A US28026605A US1905280266A US872307A US 872307 A US872307 A US 872307A US 28026605 A US28026605 A US 28026605A US 1905280266 A US1905280266 A US 1905280266A US 872307 A US872307 A US 872307A
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United States
Prior art keywords
propeller
fan
vanes
blades
concave
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US28026605A
Inventor
Frederick G Sargent
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C G SARGENTS SONS Corp
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C G SARGENTS SONS CORP
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Priority to US28026605A priority Critical patent/US872307A/en
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Publication of US872307A publication Critical patent/US872307A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes

Definitions

  • Figure 1 shows in elevation a device constructed in conformity with the invention.
  • Fig. 2 shows the same in side elevation.
  • Fig. 3 is a diagram showing the sequence of concave and convex vanes or blades.
  • FIG. 2 is shown a portion of a suitable supporting shaft; at 2 is the hub of the propeller or fan, it being mounted upon the said shaft; at 3, 3, etc., are arms which are fixed to the said hub'and radiate therefrom; and at 4, 4, etc. are the vanes or blades.
  • the arrow 5 in each of the figures shows the direction of rotation, and the arrows 6, 6, etc., in Figs. 2 and 3 show the direction in which, for instance, air is forced in case of utilization of the invention in a fan.
  • the acting faces of the alternate vanes or blades are desi nated, respectively, 4, 4, and 4 4
  • the former, namely, 4, 4, are concave, and the others, namely, 4 4, are convex.
  • a rotary propeller or fan comprising vanes or blades following one another in series and alternately having concave and convex faces facing in the direction of movement.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

PATENTED NOV. 26, 1907.
1?. G. SARGENT. PROPELLER OR PAN.
APPLICATION FILED SEPT. 27. 1905.
m m mqm 'NVENTOR WITNESSES.
AYTQRNEV.
" UNITED STATES PATENT OFFICE.
FREDERICK G. SARGENT, OF GRANITEVILLE, MASSACHUSETTS, ASSIGNOR TO C. G. SARGENTS SONS CORPORATION, OF GRANITEVILLE, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS.
PROPELLER OR FAN.
Specification of Letters Patent.
Patented Nov. 26, 1907.
Application filed September 27. 1905. Serial No. 280,266.
specification, reference being had therein to the accompanylng drawings.
The invention consists in a device of novel construction designed and adapted for use either as a propeller, or as a rotary fan for ventilating, blowing, or drying purposes, and which has peculiar and important advantages when employed for producing the currents of air which are utilized in the process of drying. l
The general object of the invention is to produce a device by the action of which the fluids set in motion thereby shall be more diversely scattered or spread than in the case of the ordinary device having all of its vanes or blades set with similar or corresponding acting faces facing in the same direction.
The invention consists in a propeller or fan having certain of the vanes or blades thereof with acting faces which are concave and others with-acting faces which are convex, with the concave and convex acting faces arranged in an alternating order of succession in the series of vanes or blades.
An embodiment of the invention is illustrated in the accompanying drawing, in which latter,
Figure 1 shows in elevation a device constructed in conformity with the invention. Fig. 2 shows the same in side elevation. Fig. 3 is a diagram showing the sequence of concave and convex vanes or blades.
Having reference to the drawings,at 1,
.Fig. 2, is shown a portion of a suitable supporting shaft; at 2 is the hub of the propeller or fan, it being mounted upon the said shaft; at 3, 3, etc., are arms which are fixed to the said hub'and radiate therefrom; and at 4, 4, etc. are the vanes or blades. The arrow 5 in each of the figures shows the direction of rotation, and the arrows 6, 6, etc., in Figs. 2 and 3 show the direction in which, for instance, air is forced in case of utilization of the invention in a fan. The acting faces of the alternate vanes or blades are desi nated, respectively, 4, 4, and 4 4 The former, namely, 4, 4, are concave, and the others, namely, 4 4, are convex.
The concave acting faces will act differently from the convex acting faces upon the fluid in which the device rotates, and the result will be a more general spreading and intermingling of the resulting currents.
I have found the device of great value in machines used for drying moist materials, in which such materials are spread upon screens and currents of air are caused to pass therethrough. In such machines, when employing rotary fans or blowers having all the vanes or blades set in the same position, the force of the air sometimes is too much concentrated to get the best results. In some cases there is a tendency to blow the stock out of place and scatter it about the screen, whereas it is desired that the material should not be disturbed after once being placed upon the screen. By having some of the vanes or blades set reversely with relation to the others, my invention causes a scattering and spreading of the air-currents which facilitates the drying operation and at the same time obviates the tendency aforesaid to disturb the stock or material upon the screen.
What is claimed as the invention is,:
A rotary propeller or fan comprising vanes or blades following one another in series and alternately having concave and convex faces facing in the direction of movement.
In testimony whereof I affix my signature in presence of two witnesses.
I FREDERICK G. SARGENT. I/Vitnesses:
GEORGE F. IRISH, OSBORN I-I. CILLEY.
US28026605A 1905-09-27 1905-09-27 Propeller or fan. Expired - Lifetime US872307A (en)

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US28026605A US872307A (en) 1905-09-27 1905-09-27 Propeller or fan.

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2965180A (en) * 1954-12-20 1960-12-20 American Radiator & Standard Propeller fan wheel
US4867643A (en) * 1988-05-19 1989-09-19 Appleton Arthur I Fan blade apparatus
US5306119A (en) * 1992-03-24 1994-04-26 Kawasaki Jukogyo Kabushiki Kaisha Ducted tail rotor for rotor craft
US20130129521A1 (en) * 2011-11-17 2013-05-23 John E. Tharp Turbine blade skirt
US20180003190A1 (en) * 2014-08-07 2018-01-04 Mitsubishi Electric Corporation Axial flow fan and air-conditioning apparatus having axial flow fan

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2965180A (en) * 1954-12-20 1960-12-20 American Radiator & Standard Propeller fan wheel
US4867643A (en) * 1988-05-19 1989-09-19 Appleton Arthur I Fan blade apparatus
US5306119A (en) * 1992-03-24 1994-04-26 Kawasaki Jukogyo Kabushiki Kaisha Ducted tail rotor for rotor craft
US20130129521A1 (en) * 2011-11-17 2013-05-23 John E. Tharp Turbine blade skirt
US20180003190A1 (en) * 2014-08-07 2018-01-04 Mitsubishi Electric Corporation Axial flow fan and air-conditioning apparatus having axial flow fan
US10767656B2 (en) * 2014-08-07 2020-09-08 Mitsubishi Electric Corporation Axial flow fan and air-conditioning apparatus having axial flow fan

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