DK142557B - Heat meter. - Google Patents

Description

OD PUBLICATION NOTICE 1 ^ 2557 DENMARK »in w.o. · e 01 k 17/02 § (21) Application No. 4002/75 (22) Filed on 8 Sep. 1975 (24) Race day 8. S ep. 1975

(44) The application submitted and Q

the petition published on 17 · HOV · 1 9θ0

Dl RECTORATE OF THE "PATENT AND TRADEMARK BASIS (30> Prior, cited by (71) ODIN CLORIUS A / s, Literbuen 16-18, 2740 Skovlunde, DK.

(72) Inventor: Knud Kjærgaard, Ludvig Holsteins Alle 76, 2750 Ballerup, DK: Eric Wandel, Finsensvej 5 B, 2000 Copenhagen F, DK.

(74) Plenipotentiary in the proceedings:

Hofman-Bang & Boutard Engineering Company__ (54) Thermometer.

The invention relates to a heat meter of the kind specified in the preamble of claim 1.

In order to obtain an accurate reading of the meter, it is known to have a front screen with a pane in which scale bars are engraved across the measuring tube. This has the disadvantage of having to find other organs, e.g. a separate spring, for retaining the measuring tube relative to the scale and in heat conducting contact with the heat conducting body.

The object of the invention is to provide a heat meter with means which, in addition to holding the measuring tube, results in an accurate reading without parallel axis error of the liquid level in the tube.

This object is achieved by means of the resilient plate according to the characterizing part of claim 1, which is arranged to press the measuring tube against the heat conducting body, and which has scale bars extending all the way to the edge of the plate facing the measuring tube which is close know this.

By means of the measures set out in claim 2, it is achieved that a point-shaped contact between the resilient plate and the measuring tube is sufficient for the measuring tube to be pressed against its heat-conducting logs throughout its length. The point-shaped contact ensures that heat is not dissipated away from the measuring tube to the plate.

An embodiment for providing a point-shaped contact is defined in claim 3 ·

By means of the tab mentioned in claim 4, the measuring tube can be quickly and easily placed correctly in relation to the scale bars on the resilient plate. From German Patent Specification No. 1,083 »067, a heat meter is known with means for correct placement of the measuring tube in relation to the scale bars. This known construction is inappropriate because a check reading, after removing the measuring tube, would require the meter to be reassembled and sealed as it is the one that determines the position of the measuring tube. According to the invention, a check reading can be performed simply by placing the measuring tube on said tab.

By the measures set out in claim 5, a very simple attachment of the resilient plate to the heat conducting body is achieved, so that the resilient effect of the plate is utilized to the best possible extent.

The invention will be explained in greater detail by the following description of an embodiment, with reference to the drawing, in which: 1 is a front view of an embodiment of the heat meter; FIG. 2 is a section through the one of FIG. 1 on a larger scale along the line A-A, while FIG. 3 shows a section through the embodiment of FIG. 1, along the line B-B.

The embodiment of the heat meter according to the invention shown in the figures comprises a heat-conducting body 1 with a vertical groove 2 for receiving a partially liquid-filled measuring tube 3. which is held below by means of a seal not shown, which engages the lower part of the groove 2.

According to the invention, a resilient plate 6 is provided between the heat-conducting body 1 and the front shield 4, which has scale bars 7a, 7b .... 7n, extending all the way to the measuring tube 3 facing and close to this edge of the plate 6. Thus, the liquid level in the tube 3 can be read without parallax error.

The resilient plate 6 has a bend 8 below which fits snugly into a horizontal slot in the heat-conducting body 1, whereby the plate 6 is retained so that its upper part is pressed against the heat-conducting body 1 due to the inherent spring effect of the plate.

According to the invention, the plate 6 has at the top a side tab 9 extending over the upper part of the measuring tube 3, which does not contain liquid, which side tab pushes the measuring tube 3 into the groove 2 for abutment against the heat conducting body 1. The edge of the side tab 9 is a projection directed towards the tube 3, so that the side tab 9 only touches the measuring tube 3 at one point a short distance below the top of the tube. By the pointwise contact, the measuring tube 3 is not cooled by the resilient plate 6, and as the contact takes place some distance below the top of the tube 3, this will be pressed against the heat-conducting body 1 throughout its length.

4 142557

In accordance with the invention, the bending 8 is extended into the groove 2, where it serves as shoulder 10 for the measuring tube 3 · Since the scale bars 7a, 7b .... 7n are therefore formed in a part which is fixedly connected to the shoulder 10, the measuring tube 3 will always in a simple manner. could be placed correctly, ie that a calibrated fluid level of a meter tube is aligned with a predetermined scale bar.

Said projection on the side tab may be provided by the upper portion of the plate 6 being slightly bent, away from the heat-conducting body 1, preferably about a line in flight with an incision 11 in the plate. FIG. 3 shows that the side tab 9 will only touch the measuring tube 3 at one point and that the upper part of the plate 6 with the side tab 9 will be actuated towards the thermally conductive body 1 when the front shield 4 is placed in place on the thermally conductive body 1 and presses against the upper edge of the plate 6 with side tab 9. This increases the pressure against the measuring tube 3 for further secure retention of this in heat conductive contact with the heat conducting body. The incision 11 causes the outermost portion of the plate 6 facing the measuring tube to be folded as shown at 12 in FIG. 2, whereby the scale bars 7a, 7b ..... 7n will be closer to the measuring tube 3 ·

It has been mentioned above that the heat meter according to the invention provides a very simple construction and safe reading of the liquid level in the measuring tube. However, it is also very easy to replace the measuring tube 3, since the old tube can be removed against the spring action of the plate 6 when the front cover 4 is removed and the new tube can be placed quickly, because the height adjustment of the measuring tube 3 required by known heat meters can be applied. is avoided as a result of the impact 10. The impact also has the advantage that if the meter reader should have forgotten the read value after the meter tube has been taken out, this can only be kept loose for abutment against the impact, whereby correct reading can be repeated quickly.