Improvements in Chimney Tops, Cowls, or Ventilators.
Year: 1886

page_text: Date of Application, 26th Aug., 1886.
Complete Left, 26th May, 1887.
Complete Accepted, 8th July, 1887.
PROVISIONAL SPECIFICATION.
Improvements in Chimney Tops, Cowls, or Ventilators.
I, THOMAS DUTTON BAYLIFF of Beach Mount House, Liscard in the County of
Chester, Engineer do hereby declare the nature of this invention to be as follows:-
This invention is designed with the view of utilizing the wind by causing an induced
current in the chimney, and consists essentially in guiding the wind so as to blow
transversely immediately over the somewhat contracted orifice of the chimney. To
effect this with certainty, I prefer to use a swing cowl and wind vane attached thereto,
but in place of arranging the cowl so as to point with the wind, I arrange it to face
the wind, and gather it on, so as to pass horizontally over the contracted orifice, and
escape behind. Various shapes of cowl and orifice can be used. For facility of
cleaning the cowl can be hinged to the chimney top or the entire top or a part thereof
hinged to the pedestal, so that it can be temporarily thrown over to one side, and the
brush rise and appear above the top of the chimney.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool,
Patent Agents for the Applicant.

page_text: Improvements in Chimney Tops, Cowls, or Ventilators.
I, THOMAS DUTTON BAYLIFF, of Beach Mount House, Liscard, in the County of
Chester, Engineer, 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 :-
This invention is designed with the view of utilizing the wind by causing an
induced current in the chimney, and consists essentially in guiding the wind so as
to blow transversely immediately over the somewhat contracted orifice of the
chimney.
It is best described by aid of the accompanying drawings in which,
Figure 1 is a section, and
Figure 2 a part elevation at right angles to figure 1 of a chimney cowl.
Figures 3 and 4 similar views of a slight variation of same.
In these A is a chimney cowl shaft, B (Figure 3) hinge so that the cowl can bo
thrown back if desired and the brush of a chimney sweeper pass out at the top.
C termination of shaft, D cowl rotating thereon supported in any of the usual modes
such as by central stud and brackets as shown in Figure 3. E contracted opening,
Fopening facing the wind kept facing it by arrow blade or vane G. H contracted
orifice conducting the air so as to blow over orifice E and cause an induced current.
I second internal concentric orifice shown in Figures 1 and 2, only this is not
absolutely necessary, but is desirable to guide the central current more perfectly.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed, I declare that what I claim is :-
1st. The improvement in chimney tops, cowls, or ventilators, which consists in
forming them with a somewhat contracted vertical orifice, and with a blow through
cowl arranged to swing round and face the wind, and so shaped as to cause the current
of air to blow across the vertical orifice, and thus induce an upward current through
the latter, substantially as described.
2nd. In combination with a terminal of a chimney shaft, with a swing round,
blow through cowl, a hinge B whereby the cowl can be laid to one side and the
chimney sweeper's brush pushed through.
3rd. The double horizontal wind cowl, substantially as and for the purposes
described and illustrated in Figure 2.
4th. The combination with a terminal for a chimney shaft of a swing round blow
through cowl, so arranged as to direct a current of air in a horizontal or slightly
upward direction immediately above and across the orifice of the terminal.
Dated this Twenty-fourth day of May 1887.