Generator of pulsated hot air and process of emission

FRENCH REPUBLIC

MINISTRY OF INDUSTRY

1^{be addition}

SERVICE

iNTELLECTUAL INDUSTRIELLE of the

No. 1.383.722

[...] no. 894,665 No. 84,709 international Classification: A 01 g-F 24 f

M. Nathan [...] residing in France (Seine).

Requisitioned 14 April 1962, to 10^{m h 15,} per-station.

Issued by stopped 22 February 1965.

(Bulletin official A property industrial, no. 14 of 1965.)

In the request of the main patent is de-

crit a transmitter apparatus for between hot air

other to the protection of plants against the frozen

rendering and rotating to emit in all di-

[...] and thereby cover a fixed point the maxi-

mum of the surface defined by the radius of the transmission.

According to the present invention the rotation of the-

apparatus can conveniently be conducted by placing

the apparatus on a circular rail on the

ground and. controlling the rotation of one of the wheels

forming part of the generator.

Another object of the present invention is the-aug

supplying broadcast coverage. It is [...] -

member desirable to extending the range of a transmitted-

sion hot air at maximum, which is possible

by increasing the volume or the speed of

the air emitted. Such solutions comprise However

many problems such as: the-aug

supplying of the power absorbed or danger for

plants. Further the increasing the range

is not proportional to the increase in the-vo

[...] or speed but varies only-

even in the best conditions-with the-ra

cine square of the variation. Practically, the flow

of an air stream generated by a fan-helical

dal-used at the time-n ' is not straight

but instead cyclonic, which leads to

depletion of the kinetic energy by [...] -

[...] and its undesirable conversion energy-ether

thermal.

According to the present invention the range of a transmitted-

sion can be approximately doubled for a

same volume of air delivered to a speed by the re-

facer of the veins of cyclonic air on the one hand and

by flattening the transmission on the other hand and

the [...] to run along the ground. Since it is known that a

65 2191,0 73,251 3

surface of a solid opposes a much lower pressure drop to the flow of gas that another gas due to turbulence created by the interpenetration of two media moving-speed or in different directions.

Another advantage of flattening the transmitter and increasing the range, thus the surface interested is that the number of calories emitted by apparatus can be increased without increasing the proportional volume of air while remaining in the limit of number of calories transmitted per unit area and time. In effect, if the limit value is exceeded a cal/m "/ hr in circumstances weather data, the web hot air rises in height as sought precisely the elevation of the temperature on the ground. The interest of the increase of the thermal power of a hot air generator without increasing the volume of air delivered is evident, because unlike the increase of air flow, the increase of the thermal power of a generator can be done almost no increase or the price or the driving force.

The rectifying and the flattening of the hot air stream emitted are obtained by a screen starting above the mouth of transmission and inclined at an angle of 20° to 30° to the ground, resembling a low-sloped roof.

Since the transmitter is rotating is normally a circular shape with a radius for example 5 to 8 m and has in the centre an opening also circular corresponding to the radius of the turning apparatus.

The display resembling a roof of a circus for example, but with the central opening mentioned, can be executed as a sheet metal, plastics or Price the booklet: 2 francs