CATALOGUE 
OF PATENT 
Ventilating Appliances, 
INVENTED BY 
P. MIH AN, 
Ventilating ([Engineer, 
479 Main Street, Cambridgeport, Mass 
FIRST CLASS WORK SOLICITED. 
Personal supervision of all work enables me to 
warrant satisfaction. 
Defective Ventilation properly adjusted. 
Instruction given in the management of hot-air 
furnaces. Defective draughts and smoky chimneys 
cured. Examinations made and advice given, on 
reasonable terms. 
PATENT RIGHTS for sale in quantity to suit 
purchasers. Mo. 1. 
Mihail’s System of Ventilation. 
(Patented June 1 6th, 1874.) 
Its object is to produce a more perfect system 
of exhaust, whereby the air of a room or series of 
rooms, disposed one above another, may not only 
be rendered purer and of a more equable tempera- 
ture, but the heating of the same be effected at a 
greater saving in the cost of fuel, in comparison 
with the ordinary methods. 
MTo. 3. 
Mihan’s Yentilator and Chimney Cap. 
The construction of this Ventilator is such, that 
it not only aids the escape of foul air, but also 
prevents snow or rain from entering the exhaust 
shaft, to a greater degree than ordinary Ventilators. 
(Patented July 6th, 1875.) 
Mo. 4. 
Milian’s Improved Ventilator. 
(Patented Sept. 28th, 1875.) 
This Ventilator in principle like No. 3. By its 
construction the parts of the Ventilator can not 
only be readily put together, but can be packed in 
a small compass, for transportation. 
No. 5. 
Mihan’s Ventilating Chair. 
{Patented Nov. 16th, 1875.) 
This Chair has a hollow pedestal, perforated at 
the back, through which the pure air enters. It is especially designed for Halls and Schools, 
as the entering air is so dispersed that its force is 
reduced. 
A splendid arrangement when fan power is used. 
Wo. 6. 
Mihan’s System of Ventilation for Prisons. 
(Patented Pec. 1 Mh, 1875.) 
This invention relates to that System of Ventila- 
tion in which two exhausts are employed, (of 
which the invention shown in Letters Patent, 
granted to me June 16th, 1871, is the type,) one 
such exhaust being disposed near the top of the 
room, to remove the foul air, the other at or near 
the floor to convey away the denser foul air. Each 
of these exhausts connect in attic with a separate 
receiving chamber. In the one which receives the 
top ventilation is a damper, so arranged that it 
can be closed from the corrider or office, thereby 
preventing unnecessary waste of heated air, and 
also saving the officers from the danger which 
they are liable, when entering cells to close or 
open the registers. 
Wo. 7. 
Mill an’s Window Ventilator. 
The object of this invention is to provide a sim- 
ple, cheap and effective device, and one which can 
be readily applied to a window, for the purpose of 
■ventilating a room or apartment. 
When properly adjusted it does not prevent the 
opening or closing of the window. 
(Patented Jan. Uh, 1876,) IX o. 8. 
Mihan’s Life Saving" Apparatus. 
(Patented Nov. 28th, 1876.) 
This invention is- designed for rescuing persons 
who have fallen into the water, from drowning, 
whether such persons may be floating on the 
water, or may have sunk in the water. 
Its construction is such that it can be carried 
in the pocket of any person without inconvenience 
IVo. o. 
Mihan’s Improved Ventilator and 
Chimney-Cap. 
(Patented Jan. 9ih, 1877.) 
This invention relates to that class of devices 
applied to tops of chimneys, in order to increase 
the draught. 
Its arrangement and construction is such that 
upward as well as lateral currents of air are made 
to impinge against the escaping contents of the 
line, also connecting the parts to the tube, which 
secures greater strength than could otherwise be 
obtained. 
]Vo. ID. 
Mihail’s Duplex Ventilator. 
(Patented Jan. 9th, 1877.) 
This invention relates to that class of Ventilators 
termed Duplex; that is, those combining both the 
principle of exhaust and supply; one portion serv- 
ing to eject the foul or impure air, and the other 
to inject or supply fresh or pure air to the building 
or apartment to be ventilated. Wo. 11. 
Milian’s Air-Heater. 
(Patented Jan. 9th, 1877.) 
This invention relates to a device or apparatus 
to be applied to either a gas or lamp burner or the 
chimney or globe thereof, for the purpose of util- 
izing the heat generated by the burner in heating 
a room or apartment to better advantage than has 
heretofore resulted. 
10. 12. 
Mihan’s Ventilating Flue. 
This invention has for its object the production 
of a simple and effective means or apparatus, for 
ventilating a building, both in summer and winter. 
By its use you can increase the exhaust at top of 
rooms in summer, and at the floor in winter, with- 
out the trouble and confusion heretofore existing. 
(Patented June 9th, 1877.) 
Wo. 13. 
Mihail’s Constant Air-Supply. 
(Patented Jan. 9th, 1877.) 
The object of this invention is to provide a 
simple and effective means, whereby a more 
thorough commingling, of the currents, of heated 
air—from the hot air supply pipe of a furnace or 
heat generator—with currents of cold air from a 
cold air supply pipe—may be effected than by ap- 
paratus of this kind heretofore constructed. My 
said apparatus being provided with means whereby 
the volume or relative proportion of the warm and 
cold air to b‘e admixed may be regulated at the will of the operator, in order that the air, when 
distributed into a room may be equally suffused 
with caloric, and such air have any desirable tem- 
perture. 
Mo. 14. 
Mihan’s Improved Chimney-Cap. 
(Patented April 1()lh, 1877.) 
This invention is designed for elevated positions 
where generally only a lateral force is encountered. 
In such case it is a very simple device, and helps 
to increase the draught. 
It has great merit. 
Mo. 15. 
Mihail’s Dome Ventilator. 
(Patented Sept, ith, 1877.) 
This-invention was designed for railroad cars, 
which, by their motion, cause the air to blow 
against the escaping column with such force, as 
not only prevents its escape, but sometimes blows 
it into the cars, much to the annoyance of passen- 
gers. This top is so constructed that the air can- 
not blow across the top of the outlet pipe, thereby 
preventing the possibility of its blowing into it. 
It has been used with much success on buildings. 
Mo. Ijß. 
Mihan’s Air-Mixer. 
(Patented Sept Ath, 1877.) 
This invention, like No. 13, is intended to aid in 
jommingling currents of cold and warm air, when 
iised for ventilation of apartments. Is very-effec- 
tive in its action. iVo. IT. 
Mihan’s Improved Chimney. 
(Patented Sept 18Ih, 1877.) 
This invention is to improve the draught of the 
several flues, and particularly such as may be 
iisod for the ventilation of apartments. 
Can be applied to chimneys having more than 
one flue. 
IVo. 18. 
Mihan’s Patent Hot Flue. 
This invention relates to, or consists in an ap- 
paratus to be applied to a ventilating flue, to pro- 
mote the draught thereof, by the employment of 
waste product of combustion, one object being to 
utilize such waste product, is to aid in effecting 
the ventilation of an apartment or building. 
Can be constructed for steam or smoke. 
(Patented Oct. 2d, 1877.) 
jVo. 10. 
Mihan’s Steam Ventilator. 
(.Patented Oct. 16th, 1877.) 
This invention is especially designed for loca- 
tions where there is waste steam, the heat of which 
is used to effect, rarefy and promote the escape of 
foul air in a ventilating shaft or tiue. 
Much heat now wasted in steam, could with this 
construction be made to promote ventilation in 
many buildings. IVo. 20. 
Mihail’s Improved Tower Ventilator. 
(Patented May 7lh, 1878.) 
The object of this invention was to produce a 
ventilator which would be ornamental as well as 
useful. If the construction is closely examined, it 
will be seen that by the use of the inner truncated 
dome, I cause a current of air to pass over the top 
of the flue, thereby promoting the escape of its 
contents. It is a prevention against down blasts 
of air. 
j\o. 21. 
Mihan?s Stove-Pipe Thimble. 
{Patented May Ith, 1878.) 
This invention is specially designed for chimney 
flues having two or more inducts, and is to prevent 
smoke, rising from a lower induct, from being de- 
flected into or against the one next above it, and 
besides, is to improve the draught of the latter. 
Wo. 23. 
Mihail’s Improved Steam-Heat Radiator. 
This invention is designed for use when external 
air is required for ventilating purposes, as the 
construction is such that although air is being ad- 
mitted through the radiator, it does not prevent 
the direct action of the radiator in the room, as 
only a portion of it is inclosed, for the purpose of 
heating the incoming fresh air. 
It has many advantages over the ordinary meth- 
ods; its damper is very ingenious. 
{Patented July 2d, 1878.)