US2881690A - Ventilators - Google Patents

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Publication number
US2881690A
US2881690A US595688A US59568856A US2881690A US 2881690 A US2881690 A US 2881690A US 595688 A US595688 A US 595688A US 59568856 A US59568856 A US 59568856A US 2881690 A US2881690 A US 2881690A
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United States
Prior art keywords
louver
trough
louvers
frame
chain
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Expired - Lifetime
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US595688A
Inventor
O'hea Ignatius John
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COLT VENTILATION Ltd
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COLT VENTILATION Ltd
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Publication date
Priority to GB2881690X priority Critical
Application filed by COLT VENTILATION Ltd filed Critical COLT VENTILATION Ltd
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Publication of US2881690A publication Critical patent/US2881690A/en
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Expired - Lifetime legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/15Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre with parallel simultaneously tiltable lamellae

Description

" April 14, 1959 l. J. o'lHp-:A 2,881,690
' VENTILATORS Filed July s. 1956 s sheets-sheet 1 I zr 4Jl l Y f6 4'I lll 2/ f6 fg if* o /12 20, f6 y Ir Zi ff 15 5/* v :3,6
' HE A VENTILATORS I. J.O
April 14, 1959 5 sheets-sheet 2 Filed July Z), 1956 Aprill 14, 1959 l. J. oHEA 2,831,590.
VENTILATORS Filed July', 1956' v 3 Sheets-Sheet 3 United States Patent O VENTILATORS Ignatius John OHea, Surbiton, England, assignor to Colt Ventilation Limited, Surbiton, England, a British com- Dany Application July 3, 1956, Serial No. 595,688
Claims priority, application Great Britain July 6, 1955 This invention relates to ventilators of the kind having controllable louvers designed to be moved from a closed position to one giving a substantially unobstructed ventilation when fully opened.
Hitherto with louver type ventilators it was dicult to obtain a satisfactory closure substantially wind proof, rain proof and/or reasonably light-tight if required.
One of the objects of the present invention is to provide an improved louver-type ventilator which will overcome some or all of the above diiculties.
In a ventilator according to the present invention each louver is hingedly mounted adjacent one longitudinal edge and is so shaped adjacent the other longitudinal edge that said second longitudinal edge is adapted to engage partly around the projection formed by the hinged mounting of the next adjacent louver. Each louver may be so shaped at each of its transverse edges that said transverse edges may engage partly around a projection at the side of the mounting of each louver and may also overlap a part of the corresponding shaped portion of the transverse edges of the next adjacent louver. Said louvers may be mounted in a box type mounting which may be provided with drainage means. Said louvers may be linked together by a movable control bar connected to each louver by suitable brackets.
Referring to the drawings filed herewith:
Fig. l is a perspective view of one form of ventilator made in accordance with the present invention,
Fig. 2 is a section on the line II-II of Fig. 1,
Fig. 2a is a detail perspective View of a portion of a louver plate showing its hinging and troughs,
Pig. 3 is a section on the line III-III ot Fig. 1 to an enlarged scale,
Fig. 4 is a section through the bellows and winding gear shown in Fig. 3,
Fig. 5 is a detail View of the chain.
According to the embodiment illustrated in the drawings the ventilator comprises a box like frame 2 forming the throat of the ventilator, the frame 2 having a flat fascia frame 4 at the front or outside. The longitudinal sides 6 normal to the fascia frame 4 are provided with flanges 8 for the whole of their height, said flanges being at right angles to the sides 6 and parallel to the fascia frame 4. Secured to or formed integral with these ilanges 8 are upstanding narrow ribs 10. Said ribs 10 in the form shown are formed of a single thickness of sheet metal angle piece disposed with one flange at right angles to the flanges 8. The ribs 10 are bolted to the anges 8 of the frame by one flange and the other upstanding anges are pierced by holes 12 at intervals along their length to receive and journal the hinge rods 14 running across the frame 2. Ten louvers 16 are hingedly mounted on the rods 14 inserted in the holes 12. Said louvers 16 are each formed from a single rectangular sheet of metal and appropriately shaped so that it can be formed by a pressing operation. The longitudinal edge of the louver sheet adjacent which the hinge is to 2,881,690 Patented Apr. 14, 1959 ICC be formed is folded to form a double thickness projection 18 (see Figure 3) the corners of which are cut away for on each side of the louver so that the projection 18 clears the anges 8 by about t/s inch on each side. The longitudinal free edge of the double thickness projection 18 is looped into a circular section dening beading 20 adapted to receive the hinge rod 14. Beading 20 is approximately "Ms inch from the double edge of the projection 18 and runs parallel thereto. The other longitudinal edge of the louver is shaped to define an inverted semi-circular trough or channel which faces in the opposite direction to the beading 20. Each of the transverse edges of the louver is formed with a slightly tapered trough 24 running from the hinge beading 20 to beyond the other longitudinal edge of the trough 22. Troughs 24 face in the same direction as the trough 22 and the larger ends of the tapered trough are adjacent the trough 22. Where each tapered trough 24 meets the trough 22 a partly circular piece 26 is cut away to allow one trough to communicate with the other.
The louvers 16 are mounted on the hinge rods 14 in the narrow ribs 10 with their hinged edges lowermost. A louver bracket 28 is rivetted or otherwise secured to each louver 16 near the trough 24. Each louver bracket 28 is provided with a hole at its free end adapted to receive the rivets of a linking control bar 30 for loose connection with the latter. Said control bar 30 is formed from a single sheet of metal bent to a narrow U and drilled through at spaced intervals to define holes 31. The free ends of the brackets 28 are pivoted in the holes 31 in the U in such a way that the control bar 30 can be moved relative to the said brackets 28.
The transverse base wall 32 of the box like frame 2 is provided with an extension 34 perpendicular thereto which carries a square tubular shield 36 bolted to it by a bracket 38. The upper end of the shield 36 is embraced by a bracket 40 bolted to the at fascia frame 4. The shield 36 forms a cover for a chain hereinafter described. A worm screw 41 inside a casing 42 at the end of shield 36 is worked by a control knob 44 to drive the chain into the shield 36 when the knob is turned. The stil section of the chain is protected by a bellow 46, and is secured to an end member 48 pivotally secured to the control bar 30 by the securing screw 52. A two-armed spring 50 is mounted on the securing screw 52. The ends of spring 50 are turned over the end member 48 and the bar 30 so that they always exert a downward pressure on the end member 48. The transverse base wall 32 also defines a trough 54 which may be provided with a drain.
Referring now to Figs. 4 and 5 the chain is of the type in which the links 56 are provided with abutments 58 and with teeth 60 forming a rack on one side of the chain. Thus in one direction the chain can only be slightly arched to form a stii rod which can be used to transmit a longitudinal thrust, while in the other direction the chain can be freely exed. The rack formed by the teeth 60 on the one side is adapted to co-operate with the worm screw 41 which thus forms a driving means for imparting a thrust to said chain. Since the two-armed spring 50 is always urging the end member 48 downwardly the chain links 56 emerging from the casing 42 will always be arranged in a slightly arched manner to form a stili rod.
The ventilator is adapted to be recessed into the wall of the building in which it is to be incorporated with the flat frame 4 flush with the surface of the wall and with the hinges of the louvers lowermost. When the louvers are open they are substantially horizontal and the chain is fully retracted into the shield 36. As the control knob is turned the chain feeds out into the bellows 46 and pushes the louvers down to the closed position. In the closed position the troughs 22 and 24 on each louver engage partly around the hingng beads 20, the upstanding portions 10 of the flanges 8 and the upper ends of the troughs y2.4 of the adjacent louvers immediately above them. In this way anyrain which ndsfits way into kthe hinges of the louvers whenthey are closed` will be carried across into the troughs l24 and will run downthem into the, trough 5 4 from which it willtdrain away through the drain which may be provided. v v
When the louvers kare open they will give positive protection against rain since the rain water will ordinarily run down the louvers and anyarried around the edge by capillary attraction will fall on to the next louver or be carried along the edges of the troughs 22 into the troughs 24.
Thus with a ventilator as described above it will be found that when closed the ventilator is substantially wind and rain proof and if made of opaque material such as metal Will be.reasonablylight-tight. Furthermore the construction is such that when open the ventilator will prevent the'entr'y lof rain-unless accompanied by a high wind.
Having thus described the invention it should be apparentthat same ,is subject to modiications obvious to any one skilled in the art.
What is claimed is:
A ventilator `comprising a frame and a plurality of louver plates hingedly mounted in said frame, each louver plate being in the form of a rectangular-sheet, a trough extending the length of one longitudinal edge of each sheet and the opposite longitudinal edge terminating in a folded back portion the free end of which forms a bead, pairs of bearing members rnounted in each side of said frame, a hinge rod extending through said bead and journalled adjacent its ends in said bearing members, the distance between the centersof adjacent bearings of each pair of bearing members being equal to the distance between the centers of the hinge rod bead and the longitudinal trough on each 1ouver,\a transverse Itrough at cach transverse edge of said louver plate facing. in the same direction as said longitudinal trough and communicating therewith, said transverse troughs tapering towards the free edge of the louver plate and extending therebeyond so that when saidlouver `plates are mounted in said frame with `the hinges lowermost and positioned to close the ventilator the bead of each louver plate is received in the trough of the next adjacent louver plate and the transverse troughs yoverlap lthe hinge rod bearing members onthe frame, the extensions of the transverse troughs of each louver plate overlapping the. ends of the transverse troughs of the next adjacent louver plate.
References Cited in the file of this patent UNITED STATES PATENTS Mader Feb. 23,
US595688A 1955-07-06 1956-07-03 Ventilators Expired - Lifetime US2881690A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US350896A (en) * 1886-10-12 Shutter-worker
US1817836A (en) * 1929-11-25 1931-08-04 Joseph V Petrelli Register
US1891485A (en) * 1931-10-14 1932-12-20 Pauly Jail Building Company Window
US2139611A (en) * 1937-01-25 1938-12-06 Floyd D Welch Awning
US2311950A (en) * 1941-02-17 1943-02-23 John Spargo Pivoted louver with seating pad

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US350896A (en) * 1886-10-12 Shutter-worker
US1817836A (en) * 1929-11-25 1931-08-04 Joseph V Petrelli Register
US1891485A (en) * 1931-10-14 1932-12-20 Pauly Jail Building Company Window
US2139611A (en) * 1937-01-25 1938-12-06 Floyd D Welch Awning
US2311950A (en) * 1941-02-17 1943-02-23 John Spargo Pivoted louver with seating pad

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