Improvements in Chimney or Ventilating Caps.
Year: 1894

page_text: Date of Application, 30th Apr., 1894
Complete Specification Left, 29th Jan., 1895-Accepted, 23rd Mar., 1895
Improvements in Chimney or Ventilating Caps.
I JOSEPH MULLIGAN, Ventilator Manufacturer of No. 32 Eyre Street
Sheffield in the County of York do hereby declare the nature of this invention to
be as follows:-
:―
It relates to caps or ventilators for smoky chimneys, all kinds of buildings ships'
hulls, sewers, railway carriages, and all other things or erections through which it
is desirable to maintain a current of air or to modify the same.
To obtain these results I use a combination of several upright strips or laths,
made of metal, terra cotta, or any other suitable material, each strip or lath having
a series of horizontal or oblique corrugations, and being so placed that the elevated
portions of the corrugations of the several strips shall be in line with the depressed
portions of the adjacent strips, or be in an angular position thereto, the intersection
of the several strips in the manner described forming openings for the outlet of
smoke or air, and for the inlet of wind-currents alternately, the combination of
strips in the manner described forming the walls of the cap. The corrugations
may be either curved or angular in their general shape.
.
The combination of strips may be surmounted with a conical, flat, or dished
cover, and may be attached thereto, to each other, and to any ordinary kind of
base by rivets, lugs, ribs or any other ordinary kind of attachment.
The action of the cap is to break up and deflect the wind-currents striking it, to
set up exhaust action in the same and to modify and equalize such exhaust action
by the arrangement of outlet and inlet openings in the manner described at the
intersections of the sides.
Dated this 27th day of April 1894.
JOSEPH MULLIGAN,
Applicant.
Improvements in Chimney or Ventilating Caps.
I, JOSEPH MULLIGAN, Ventilator Manufacturer of No. 32 Eyre Street
Sheffield in the County of York 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:-
It relates to caps or ventilators for smoky chimneys, all kinds of buildings, ships'
hulls, sewers, railway carriages, and all other things or erections through which it
is desirable to maintain a current of air or to modify the same and is designed to
break up and deflect wind currents striking the same and to modify the action of
euch wind currents so as to prevent down draught and maintain a free outlet for
vitiated air or smoke.
To obtain these results I use a combination of several upright strips or laths,
made of metal, terra cotta or any other suitable material, each strip or lath having
a series of horizontal or oblique corrugations and being so placed that the elevated
portions of the corrugations of the several strips shall be in line with the depressed
Price dl

page_text: portions of the adjacent strips, or shall form angles therewith, the intersection of
the several strips in the manner described forming alternate openings for the outlet
of smoke or air, and for the inlet of wind-currents, the combination of strips in the
manner described forming the walls of the cap.
The combination of strips may be surmounted with a conical, flat, or dished
cover and may be attached thereto, to each other, and to any ordinary base by
rivets, lugs, ribs, or any ordinary kind of attachment.
Now, in order that my invention may be clearly understood I have hereto
annexed one sheet of drawings illustrating my improvements as hereinbefore set
forth and in which the same letters of reference indicate the same or similar parts
in any of the figures.
Fig. 1. is a representation in single line of a chimney or ventilating cap having
six strips or laths a. a. each strip having a series of horizontal corrugations, curved
in their general shape, shewing openings b. b. at the intersection of the strips for
the outlet of smoke or vitiated air, and for the passage of wind-currents through
the cap, and attached to ordinary base or shaft c.
Fig. 2 is a representation of a cap having four strips only, and surmounted with
a conical cover, otherwise being the same as Fig. 1.
Fig. 3 is a representation of a cap having six strips or laths, with oblique
corrugations otherwise being the same as Fig. 1.
Fig. 4 is a smaller representation of a chimney or ventilating cap shewing the
laths or strips with the corrugations angular in their general shape.
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;
In a chimney or ventilating cap the formation of the walls of such cap by a
combination of several laths or strips, such strips having a series of horizontal or
oblique corrugations and being placed together in the relative positions as herein
described and substantially as shewn in the accompanying drawings.
Dated this 28th day of January 1895.
JOSEPH MULLIGAN,
Applicant.