US1250681A - Fan-blade. - Google Patents

Fan-blade. Download PDF

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Publication number
US1250681A
US1250681A US15872617A US15872617A US1250681A US 1250681 A US1250681 A US 1250681A US 15872617 A US15872617 A US 15872617A US 15872617 A US15872617 A US 15872617A US 1250681 A US1250681 A US 1250681A
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United States
Prior art keywords
blade
fan
loop
edge
fan blade
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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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US15872617A
Inventor
Sidney Randolph Sheldon
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Individual
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Priority to US15872617A priority Critical patent/US1250681A/en
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Publication of US1250681A publication Critical patent/US1250681A/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
    • A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
    • A47J43/07—Parts or details, e.g. mixing tools, whipping tools
    • A47J43/0705—Parts or details, e.g. mixing tools, whipping tools for machines with tools driven from the upper side
    • A47J43/0711—Parts or details, e.g. mixing tools, whipping tools for machines with tools driven from the upper side mixing, whipping or cutting tools
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/16—Air or water being indistinctly used as working fluid, i.e. the machine can work equally with air or water without any modification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/54—Building or constructing in particular ways by sheet metal manufacturing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade

Definitions

  • I,-SIDNEY RANDOLPH SHELDON of the city of Galt, in the county of Waterloo, in the province of Ontario
  • My invention relates to improvements in fan blades and the object of the invention is to devise a fan blade so formed as to eliminate the sharp shrill noise caused by the sharp edge of the blade cutting through the air and to produce a low toned hum-- accordance with my invention mounted therein.
  • Fig. 2 is a face elevation of a fragment of a fan showing a portion of the annular fan blade supporting plate broken away to exhibit the fan blade construction.
  • Fig. 3 is a detail of an alternatecon struction of blade.
  • V v '1 indicates the fan .frame' comprising the back plate 2 to which the hub 3 is secured and the annular front plate 4 spaced apart from the back plate 2 and between which the fan blades 5 extend in the usual manner.
  • FIG. 2 have shown the loop, portion -6 separated from' the fan' blade and at tached thereto by rivets 7 passing through the fan blade and the free ends of the Inv Fig. 3,1 I have shown an alternative construction in which the loop'is made integral with theblade, the loop being formed by a blade extension which is turned in:
  • This enlargement might also be constructed by casting a strip of metal of the required form having its outer edge rounded and its inner edge recessed so as to receive the, blade edge, such recessed portion being rivetedior otherwise secured to the blade.
  • a high speed fan blade having its forward edge provided with a loop portion presenting .a rounded cutting edge.
  • a high speed fan blade comprising a loop mem er extending from end to end of the forward edge of the blade and suitably secured thereto.

Description

S. R. SHELDON.
FAN BLADE.
APPLICATION man MR. 30 19!].
Patented D60 18, 1917.
.ing the blades and a blade constructed in 2 5 UNITED STATES PATENT OFFICE.
SIDNEY RANDOLPH'SHELDON, OF GAL'I, ONTARIO, CANADA.
FAN-BLADE.
Specification of Letters Patent.
Patented Dec. '18, 1917.
Application filed March so, 1917. Serial m5. 158,726.
To all whom it may concern: Y
Be it known that I,-SIDNEY RANDOLPH SHELDON, of the city of Galt, in the county of Waterloo, in the Province of Ontario,
Canada, have invented certain new and. useful Improvements in Fan-Blades, of which the following is the specification.
My invention relates to improvements in fan blades and the object of the invention is to devise a fan blade so formed as to eliminate the sharp shrill noise caused by the sharp edge of the blade cutting through the air and to produce a low toned hum-- accordance with my invention mounted therein. I
Fig. 2, is a face elevation of a fragment of a fan showing a portion of the annular fan blade supporting plate broken away to exhibit the fan blade construction.
Fig. 3, is a detail of an alternatecon struction of blade.
In the drawings like letters of reference indicate corresponding parts in the various figures. a V v '1 indicates the fan .frame' comprising the back plate 2 to which the hub 3 is secured and the annular front plate 4 spaced apart from the back plate 2 and between which the fan blades 5 extend in the usual manner.
Ordinarily a fan blade is made out-of a thin metal having a comparatively sharp edge which cuts -through the air producing a sharp shrill noise. To overcome this defect I have formed the front edge ofthe loop.
fan blade with an enlarged portion 6 preferably formed loop-shaped, the free endsof the loop. being secured to the upper and lower face of the blade, from which point the loop gradually spreads outward to form a substantiall semi-circular end.
In Fig. 2, have shown the loop, portion -6 separated from' the fan' blade and at tached thereto by rivets 7 passing through the fan blade and the free ends of the Inv Fig. 3,1 I have shown an alternative construction in which the loop'is made integral with theblade, the loop being formed by a blade extension which is turned in:
,wardly, and riveted to the lower face of the fan blade. This enlargement might also be constructed by casting a strip of metal of the required form having its outer edge rounded and its inner edge recessed so as to receive the, blade edge, such recessed portion being rivetedior otherwise secured to the blade.
It will thus be seen by this construction that I have provided a blade edge which has a broad rounded outer edge portion which in cutting through the air produces a low humming tone which will merge in with the general noise of a factory and be unnoticeable and will, therefore, eliminate the disagreeable sound commonly caused by a rotating fan.
What I claim as my invention is. 1. A high speed fan blade having its forward edge provided with a loop portion presenting .a rounded cutting edge. I
2. A high speed fan blade comprising a loop mem er extending from end to end of the forward edge of the blade and suitably secured thereto.
SIDNEY RANDOLIH SHELDON.
I Witnemes: G. T. OLINs,
A. P. WELLAND.
US15872617A 1917-03-30 1917-03-30 Fan-blade. Expired - Lifetime US1250681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15872617A US1250681A (en) 1917-03-30 1917-03-30 Fan-blade.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15872617A US1250681A (en) 1917-03-30 1917-03-30 Fan-blade.

Publications (1)

Publication Number Publication Date
US1250681A true US1250681A (en) 1917-12-18

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Application Number Title Priority Date Filing Date
US15872617A Expired - Lifetime US1250681A (en) 1917-03-30 1917-03-30 Fan-blade.

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774308A (en) * 1952-04-22 1956-12-18 Ulander Per Helge Natanael Radial flow impellers
US3070287A (en) * 1959-07-16 1962-12-25 Eck Bruno Drum rotor for radial blower
US3093299A (en) * 1961-05-15 1963-06-11 Trane Co Centrifugal fan
US3406760A (en) * 1967-09-18 1968-10-22 Wallace Murray Corp Flexible blade fan
US3850545A (en) * 1972-09-07 1974-11-26 Hayes Albion Corp Flex fan
US4324529A (en) * 1980-06-16 1982-04-13 General Electric Co. Axial-centrifugal flow impeller
US5064346A (en) * 1988-06-17 1991-11-12 Matsushita Electric Industrial Co., Ltd. Impeller of multiblade blower
US5725354A (en) * 1996-11-22 1998-03-10 General Electric Company Forward swept fan blade
WO2015036497A1 (en) * 2013-09-12 2015-03-19 Nuovo Pignone Srl Liquid tolerant impeller for centrifugal compressors
US20180216627A1 (en) * 2014-08-26 2018-08-02 Ihc Holland Ie B.V. Impeller blade with asymmetric thickness
US20180274374A1 (en) * 2015-09-28 2018-09-27 Safran Aircraft Engines Blade comprising a leading edge shield and method for producing the blade

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774308A (en) * 1952-04-22 1956-12-18 Ulander Per Helge Natanael Radial flow impellers
US3070287A (en) * 1959-07-16 1962-12-25 Eck Bruno Drum rotor for radial blower
US3093299A (en) * 1961-05-15 1963-06-11 Trane Co Centrifugal fan
US3406760A (en) * 1967-09-18 1968-10-22 Wallace Murray Corp Flexible blade fan
US3850545A (en) * 1972-09-07 1974-11-26 Hayes Albion Corp Flex fan
US4324529A (en) * 1980-06-16 1982-04-13 General Electric Co. Axial-centrifugal flow impeller
US5064346A (en) * 1988-06-17 1991-11-12 Matsushita Electric Industrial Co., Ltd. Impeller of multiblade blower
US5725354A (en) * 1996-11-22 1998-03-10 General Electric Company Forward swept fan blade
WO2015036497A1 (en) * 2013-09-12 2015-03-19 Nuovo Pignone Srl Liquid tolerant impeller for centrifugal compressors
CN105723094A (en) * 2013-09-12 2016-06-29 诺沃皮尼奥内股份有限公司 Liquid tolerant impeller for centrifugal compressors
US20160222980A1 (en) * 2013-09-12 2016-08-04 Nuovo Pignone Srl Liquid tolerant impeller for centrifugal compressors
JP2016531241A (en) * 2013-09-12 2016-10-06 ヌオーヴォ ピニォーネ ソチエタ レスポンサビリタ リミタータＮｕｏｖｏ Ｐｉｇｎｏｎｅ Ｓ．Ｒ．Ｌ． Liquid-resistant impeller for centrifugal compressors
CN105723094B (en) * 2013-09-12 2019-02-26 诺沃皮尼奥内股份有限公司 The impeller of tolerance liquid for centrifugal compressor
US10920788B2 (en) 2013-09-12 2021-02-16 Nuovo Pignone Srl Liquid tolerant impeller for centrifugal compressors
US20180216627A1 (en) * 2014-08-26 2018-08-02 Ihc Holland Ie B.V. Impeller blade with asymmetric thickness
US20180274374A1 (en) * 2015-09-28 2018-09-27 Safran Aircraft Engines Blade comprising a leading edge shield and method for producing the blade
US11105210B2 (en) * 2015-09-28 2021-08-31 Safran Aircraft Engines Blade comprising a leading edge shield and method for producing the blade

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