Improvements in Cowls.
Year: 1894

page_text: Date of Application, 22nd Feb., 1894
Complete Specification Left. 19th Nov., 1894-Accepted, 22nd Dec., 1894
PROVISIONAL SPECIFICATION.
Improvements in Cowls.
ALFRED RANSOM 15 Downing Street Farnham Surrey Plumber and Sheet-
metal Worker do hereby declare the nature of this invention to be as follows:-
A cowl as Fig. 1 (side view) and Fig. 2 (end view) AAA Figs. 1 and 2 are
3 double wing louvres B. Fig. 1 and B. B. B. Fig. 2. is a curved hood open both
ends. C. is top of flue or base pipe. Figs. 3. 4. and 5 are to explain the proper
way to cut and make the cowl in sheet metal, but it can be made in earthenware or
other suitable material also. Fig. 3 shows stout iron support for louvres and
hood. Fig. 4 is pattern to cut louvres, and Fig. 5 is pattern for hood.
ventilators, it would be an advantage to add 1 or more louvres, fix both them and
the hood closer together and cover in ends of hood with wire or louvres. This
would prevent the ingress of leaves, birds and the like. With a view to symmetry,
economy, and efficacy the patterns herein mentioned have been proved to give best
results, but may be modified according to circumstances.
Dated this 21st day of February 1894.
For
Improvements in Cowls.
ALFRED RANSOM 15 Downing Street Farnham Surrey Plumber and Sheet-
metal Worker do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
A cowl constructed of metal earthenware, or other suitable material, for inducing
an upward current of air and preventing smoke, foul air, and the like being blown
downwards in chimneys ventilating shafts and the like, as drawings left with my
Provisional Specification.
Any number of louvres A may be used in conjunction with hood B and
support D.
The louvres A are cut as shewn in Fig. 4 and bent to form a conical ring as
usually applied to louvre cowls, but instead of the base being left round, it is bent
to an oval shape with its lesser diameter equal to the diameter of its circular top as
shewn in Figs. 1 and 2.
The hood B is cut as shewn in Fig. 5 and bent at H H to form a half round to
fit over sides of louvres A as shewn at B B B Fig. 2.
By forming the louvres and hood in this way it is possible to fix all parts to one
strong support as D Fig. 3.
This support may be either inside or outside, and if made of iron and well
rivetted together, the cowl will withstand any amount of heat without falling to
pieces.
The louvres and hood may be arranged as shewn in Fig. 1, or in any other
suitable manner as for instance :-Any one of the louvres may be inverted and
joined to one of the others so as to form a chamber.

page_text: The length of hood at H H Fig. 5, and also the angle of louvres may be
varied.
Extra guards may be placed over openings of hood, to prevent birds, leaves, and
the like entering, or other extra parts added to make the cowl more ornamental if
desired.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The combination with louvres A and hood B of a support D, forming a cowl
substantially in the manner as hereinbefore described and illustrated.
Dated this 17th day of November 1894.
ALFRED RANSOM.