US979390A - Cowl for ventilating and other purposes. - Google Patents

Cowl for ventilating and other purposes. Download PDF

Info

Publication number
US979390A
US979390A US56993110A US1910569931A US979390A US 979390 A US979390 A US 979390A US 56993110 A US56993110 A US 56993110A US 1910569931 A US1910569931 A US 1910569931A US 979390 A US979390 A US 979390A
Authority
US
United States
Prior art keywords
blades
cowl
ventilating
purposes
concavities
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
Application number
US56993110A
Inventor
Samuel Ewart
Original Assignee
Samuel Ewart
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Samuel Ewart filed Critical Samuel Ewart
Priority to US56993110A priority Critical patent/US979390A/en
Application granted granted Critical
Publication of US979390A publication Critical patent/US979390A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23LSUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/10Tops for chimneys or ventilating shafts; Terminals for flues wherein the top moves as a whole

Description

S. EWART.

GOWL r011 VENTILATING AND OTHER PURPOSES.

APPLIUATION FILED JULY 1, 1910.

Patented Dec. 20, 1910.

\ n l l l lH l hP Hl O l nu: NORRIS PETERS qu., wasmus'rou, 'a c.

SAMUEL EWAR'I, OF LONDON, ENGLAND.

COWL FOR VENTILATING AND OTHER PURPOSES.

Specification of Letters Patent.

Application filed July 1, 1910.

Patented Dec. 20, 1910.

Serial No. 569,931.

T 0 all whom it may concern:

Be it known that I, SAMUEL EWART, a subject of the King of Great- Britain, residing at 3&6, 3&8, and 350 Euston road, London, England, have invented new and useful Improvements in Cowls for Ventilating and other Purposes, of which the following is a specification.

My invention relates to cowls for ventilating purposes and for preventing down draft in chimneys or ventilating pipes or shafts, and to that class of cowl provided with a rotating head having upon ita number of blades or vanes against which the wind acts to cause the rotation, the object of my invention being to render such cowls more eiiicient in operation than heretofore.

In the cowl constructed according to my invention the blades or vanes are approximately of ogee shape in horizontal section, and extend from a ring which forms the lower end of the head up to the apex of the cone forming the upper part of the head, the said blades being bent or shaped to lie with their inner edges upon the said ring and cone. The outer edges of the said blades are in a vertical or substantially vertical position from the lower to the upper end, and the concavities on the front faces which catch the wind are adjacent to the outer edges, while the concavities on the rear faces of the blades serve to direct any wind which strikes them into the concavities of the front faces of the adjacent blades, so as to assist in rotating the hood without the liability of the wind blowing directly into the said hood between the blades. The concavity of the outer portions of the blades adjacent to the edges is also such that the rear or convex sides of these outer portions slope rapidly back away from the outer edges.

To enable the invention to be fully understood, I will describe it by reference to the accompanying drawing, in which Figure 1 is a sectional elevation of a cowl constructed according to my invention. Fig. 2 is a sectional plan view thereof. Fig. 3 is a section on the line 33, Fig. 1, viewed in the direction of the arrow, and Fig. 4 is a vertical section illustrating a detail.

a is a stationary portion of the cowl, b the ring which forms the lower end of the head, and 0 the cone which forms the upper part of the head thereof. This cone Z) is connected at its upper part to the bridgepiece Z) secured to the upper end of the pivot spindle b the said spindle passes through the bearing bush or sleeve 72 to the upper part of which is attached the oil cup 6 also traversed by the spindle.

(Z, (Z are the. blades or vanes, each of the said blades being connected at its lower end to the aforesaid ring I), and at its upper end to the apex of the cone 0. Each of the blades (Z' is bent or shaped so as to lie with its inner edge upon the ring or cone, its outer edge being vertical, or substantially vertical as will be clearly seen by reference to the drawing. Furthermore, each blade is so shape-d that it presents two concavities, that is to say, a concavity 6 adjacent to the outer edge on the front face, and a concavity f on the rear face.

As above described, the concavities e are designed to catch the wind for the purpose of rotating the cowl, while the concavities f are designed to deflect any wind which may strike them into the concavities e of the adjacent blades, thereby assisting in rotating the hood and preventing wind blowing directly into the same between the blades (Z, (Z.

It will also be seen that the concavities 6 adjacent to the outer edges of the blades slope rapidly back away from the said outer edges when merging into the concavities f.

Cowls made as above described are more efficient in operation than cowls of this type as hitherto made owing to the special construction of the blades, which not only prevent wind blowing directly into the hood but also lessen the resistance to rotation owing to their ogee shape thus enabling the cowls to remain in motion under the action of a gust of wind longer than is possible with cowls as heretofore made.

Claims.

1. A. cowl of the class described, comprising blades of approximately ogee shape in horizontal cross section, a cone and a ring, the main portion of said blades extending vertically and set substantially in a tangential position with their lower ends secured to said ring, and their upper portions extending inwardly over and upon the said cone and secured to the upper end thereof, substantially as described.

2. A cowl of the class described, comprising blades of approximately ogee shape in transverse sect-ion, a cone and a ring, the main part of said blades extending verticavity on the front face of the next adjacent blade, substantially as described.

SAMUEL EWART.

Witnesses J OHN E. BONSFIELD, C. G. REDFERN.

US56993110A 1910-07-01 1910-07-01 Cowl for ventilating and other purposes. Expired - Lifetime US979390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US56993110A US979390A (en) 1910-07-01 1910-07-01 Cowl for ventilating and other purposes.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US56993110A US979390A (en) 1910-07-01 1910-07-01 Cowl for ventilating and other purposes.

Publications (1)

Publication Number Publication Date
US979390A true US979390A (en) 1910-12-20

Family

ID=3047766

Family Applications (1)

Application Number Title Priority Date Filing Date
US56993110A Expired - Lifetime US979390A (en) 1910-07-01 1910-07-01 Cowl for ventilating and other purposes.

Country Status (1)

Country Link
US (1) US979390A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6302778B1 (en) * 1999-05-13 2001-10-16 Gabriel Andrews Turbine roof ventilator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6302778B1 (en) * 1999-05-13 2001-10-16 Gabriel Andrews Turbine roof ventilator

Similar Documents

Publication Publication Date Title
US1100332A (en) Windmill.
US1062258A (en) Propeller.
US1408715A (en) Air-blowing device
US833184A (en) Windmill.
US2628019A (en) Free air fan
US1560527A (en) Spraying apparatus
US2160323A (en) Propeller
US1991095A (en) Silent pressure fan
DE102007037586B3 (en) Stirring device for activated sludges
US581311A (en) Windmill
US1021822A (en) Screw-propeller.
US1977934A (en) Rotary ventilator
US2279016A (en) Air turbine ventilator
US1889117A (en) Ventilating device
US1246090A (en) Fan.
US855131A (en) Screw-propeller.
US188020A (en) Improvement in wind and water wheels
US756372A (en) Windmill.
US550336A (en) Hose-nozzle
US601355A (en) Thomas wilson paterson
US2189767A (en) Fan
US1466472A (en) Fan
US1150241A (en) Fan-blade.
US536097A (en) Means for removing dust
US1803220A (en) Water turbine