DE2063607A1 - Device for generating temperature gradients - Google Patents

Description

Patent attorney patent attorneys Dr. phi !. Gerhard Henkel Dr. rer. nat. Wolf-Dieter Henkel

757 Baden-Baden Bellow DI ρ 1. - I η g. R β I f M. core

waidgasse 20 "8 Munich 90

Tel.:(07221)63427 Eduard-Schmld-Str. 2 Telegr.-Adr .: Ellipsoid Baden-Baden Tel.:(0811)225197 Ttl * gr.-Adr.i Elllpwld Mond ·· »

Toyo Kagaku Sangyo Kaibushiki Kaisha,

Akira Nobe and Toshitaka Uakae ^{Ab ie} - ⁹ · ^{70 new}

Tokyo or Qkayama «Japan

Telephone number 66 31 97

² DEC 3! 970

L -I

Under characters:

Subject: Device for generating temperature gradients

The invention relates to a device for generating Temperature gradients to grow and study microorganisms at different temperatures at the same time.

Microorganisms must be temporarily at different Temperatures within a certain temperature range are investigated or treated, which for their natural Conditions are provided in which they should develop spontaneously · In addition, a metal must often be present its state of corrosion in a given liquid be examined at different temperatures. In these From an experimental point of view, it is desirable that the cultivation and study of microorganisms are feasible at the same time. In addition, the temperature gradients must be able to be generated regularly and consistently. aside from that it is essential to generate the temperature gradient as quickly as possible. To ensure better results, the Device can generate vibrations during operation according to the operator.

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So far, microorganisms have been container grown, the temperature of which in advance to the required Value has been set. With this' well-known In the process, however, the temperature must be controlled very frequently unless numerous containers are provided. Nevertheless, it is impossible to remove the microorganisms to be treated under continuous temperature gradients *

The object of the invention is that of the known method to avoid inherent disadvantages and still optimally meet the stated requirements »

According to the invention, this object is achieved by a device solved to generate temperature gradients, which is characterized by a bar-shaped block from a thermally conductive material, such as pure aluminum, which am one end with a heat source and the other end with a cooling device is provided and in the surface of which there are bores and grooves for receiving the robes to be treated provided.

The following is a preferred embodiment of the invention explained in more detail using the drawings * They show:

flg. 1 shows a schematic representation of a device with the features of the invention,

Fig. 2 is a plan view of a metal block with a Heat source at one end and a cooling device at the other end,

FIG. 3 shows a side view of the device according to FIG. 1 with broken away to show the internal structure Share,

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Fig. 4 is a vertical section along the line A-A in Fig 3 and

Fig. 5 is a graphical representation of the with the aid of the invention Device generated temperature gradients.

In the embodiment of the invention shown in the drawings, a bar-shaped metal block 1 is means Pivot pin 14 mounted in bearings 15 provided on a bracket 16. The pivoting of the block 1 can, for example take place in that the block 1 with a not shown, driven by an electric motor crank is provided. The block iv according to FIG. 2 with axially extending grooves 2 and 3 for receiving Petri dishes thermally conductive material, such as stainless steel, in which microorganisms, such as bacteria, for breeding and Investigative purposes are introduced. The grooves 3 are narrower than the grooves 2 and serve to hold thin glass flasks in which microorganisms are exposed to air be bred. However, the microorganisms can also be mixed with gelatine directly into these grooves be introduced so that they can move freely and their find optimal heat conditions. The side surfaces of the block 1 are preferably with transverse bores 17 provided, in which according to FIG, 3 L-shaped test piston 4 can be inserted securely in position with open ends pointing upwards. This alignment of the test piston 4 is ensures that its contents are securely retained. This is particularly advantageous when the block is protruding indicated way is vibrated.

The block 1 consists of a thermally conductive material such as aluminum or silver; because of economical reasons

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however, the use of pure aluminum is recommended. When using pure aluminum, the tempera « temperature changes continuously and regularly, as shown by the straight lines in FIG the temperature gradients are reproduced regularly and consistently, what kind of. conducting such experiments is extremely useful. The advantages of the invention could have already been demonstrated repeatedly in practice.

A heat source is built into the block 1 at one end and a cooling device is installed at the other end. The cooling device consists of a chamber 5 through which water flows from an inlet ζ to an outlet 7, which water has previously been ^{cooled to 0 0} O by a freezer device (not shown) mounted in the console 16 and to which an antifreeze agent is added. During the circulation through the chamber 5, the desired water temperature is constantly maintained by means of a thermostat. An opening normally closed by a plug 9 is used to refill water and to add the anti-freeze agent. The heat source consists of electrical heating elements 10 and 11 which are arranged in the end facing away from the cooling device and to which a thermistor 12 is assigned. Instead of the chamber 5, a further block piece can also be provided on the underside of the cooling section, which is immersed in water in a container and thus transfers the low temperature to the main block 1. To ensure better results, an automatic temperature controller can be provided in the vicinity of the heat source, which preferably has a stainless steel-lined chamber, a stirrer and an electrical heating element, so that the temperature prevailing in the heating section can be neglected with negligible deviation or error *

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quota can be kept within a certain range can.

The temperature gradients generated with the aid of the device according to the invention are based on the curves according to FIG. 5. As duroh the straight lines is illustrated, the temperature changes in each of the Paelle (1), (2) and (3) continuously and gradually increasing "the temperature changes in the SiOH Pail (1) from -1O ⁰ O O ⁰ to +80 , in case (2) from O ⁰ O to 60 ⁰ O and in Pail (3) from 2O ⁰ O to 50 ⁰ O,

As mentioned, according to the invention, temperature * slope generated within the predetermined range. In addition, the block can, if desired, be made to vibrate will. Duroh the erfindungegemäßf construction will be the Experiments are spared operating and maintenance troubles. The device can do any; to accommodate any type of container, so that a successful cultivation of Microorganisms are possible both in liquid and on a solid bed. As if through the straight lines according to Pig * 5, the temperature drops are regular and continuously or steplessly something for the breeding of Microorganisms and the investigation of any changes of metal is particularly advantageous at numerous different temperatures. Another advantage is that the breeding and the investigation can be carried out at the same time, while traditionally numerous devices are required for the same work. the The device according to the invention is for asahlreiohe applications purposes in those with fermentation, miloheic acid bacteria, Food production, brewing water and the like "concerned" Branches of industry and other areas of the chemical advantage « liable «

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. In summary, the invention thus creates a device for the spontaneous generation of temperature drops, which is suitable for the cultivation of microorganisms and the examination of a metal for its state of corrosion at numerous different temperatures and at which a block of a thermally conductive material at one end with a heat source and at the other The end is provided with a cooling device »

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Claims (2)

Pat ent claims 1 «device for generating a temperature drop, characterized by a bar-shaped block (1) Made of a thermally conductive material, such as pure aluminum, which is connected to a heat source at one end (10,11) and at the other end with a cooling device (5) is provided and in its surface bores (17) and grooves (2,3) for receiving the areas to be treated Samples are provided. 2. Device naoh claim 1, characterized in that the heat source has at least one electrical heating element (10,11) and the cooling device has a chamber (5) for receiving a cooling liquid which is passed through the chamber is passed through after it has previously been cooled by a separate device % * Device according to claim 1 or 2, characterized in that the block (1) can be swiveled in place by means of bearing journals (14) which are provided in the bracket (16); and is provided with a crank that can be driven by an electric motor, with the aid of which it is set in vibration in the bearings. BATH ORIGINAL 109830/2105 Blank page