CN86100609B - Measuring instrument - Google Patents

Abstract

The region between the outermost firing shaft and the outer wall of a chamber type furnace for baking carbon blocks, in particular anodes for the fused salt electrolytic production of aluminum, comprises essentially at least one layer each of firebricks as the wall of the outermost firing shaft, insulating refractory foamed bricks and moler stone or calcium silicate bricks at the outer wall of the furnace. The layer of insulating, refractory foamed bricks is fixed to the outer wall without room for play. Sealing elements on a projection of the outer wall extending over but at a distance from the insulating layers and on the outermost firing shaft interlock with one another.

Description

Measuring appliance

The relevant bending point from bend of the present invention is measured the measurement of length chi.

The United States Patent (USP) 3 that has earlier, disclose a kind of protractor that is contained on the folding rule in 431, No. 653, this protractor has two arms that are hinged together, one of them arm can be contained on the part of folding rule with rolling over, and a protractor index dial around articulated joint is arranged on this arm.Angle between the longitudinal axis of the longitudinal axis of the prolongation of this part of another arm measure and the prolongation of another part, thus this folding rule is changed into the composition of protractor and folding rule.

Yet, the above-mentioned a pair of rule that measuring appliance is arranged earlier is because with being articulated and connected, this hinge portion comes out from the angle convex, the also poor several millimeters time marquis of radius when the sweep and the hinge portion of measured object, sweep and hinge portion can't bump, so can measure, when sweep enters in the radius of hinge portion, sweep withstands hinge portion, measured object and rule can not be close to, therefore can not measure, and on the rule of the another side on this measuring appliance, have protractor, the measurement of the bool more than 90 ° is played blanketing.

The present invention, is improved the hinged state of a pair of gage, thereby a kind of measuring appliance that can measure bool is provided with a special part in addition in order to solve top said problem.

The present invention shown in the figure of each embodiment like that, downside at reference edge 15 1 ends, be provided with a cylinder 16 with center of circle, the top of this cylinder 16 cuts first half along reference edge 15, the center pit 17 of said reference limit 15 and cylinder 16 is engaged, become and cut part ruler 14 on one side, the downside of reference edge 20 1 ends is ined succession one centered 19, this top of 19 cuts first half along reference edge 20, ruler 18 as another side, above-mentioned axle 19 is engaged in the cylinder 16 freely rotates, on the ruler 14 and 18 on one side or both sides, being as the criterion with the centre of gyration engraves length scale 21.

With the measuring appliance of making like this, pull ruler 14 curved on one side, be close to one side of measured object, the ruler 18 of another side is leaned against on the another side of measured object 23, the bending point a of this measured object 23 and ruler 14, the centre of gyration S of 18 hinge portion is consistent, so in this state, the size that the pairing scale 21 of the point that will measure of measured object 23 is read is exactly the actual measurement size from bending point a to this point, and, because this measuring appliance ruler 14 on one side is connected with cylinder 16, this cylinder 16 and be connected in axle 19 coordination hinges on the ruler 18 of another side, so not have the thing that protrudes in the angle of ruler 14,18, thus can be in bending the inboard of measured object 23 also can make ruler 14,18 are close to and measure.

And this measuring appliance can make ruler 14,18 be deployed into 180 °, therefore can measure the measured object that obtuse angle more than 90 ° is arranged.

The present invention is described in detail with illustrated embodiment below.

The 1st figure to the 3 figure are basic embodiment, among the figure 14 is rulers on one side, the downside of its end is the centered cylinder 16 of ining succession on reference edge 15 shown in the 5th figure, excise first half from reference edge 15 beginnings on the top of this cylinder 16, and the reference edge 15 of above-mentioned ruler 14 and the endoporus 17 of above-mentioned cylinder 16 are cut into semicircle with being harmonious.

The 18th, the ruler of another side, the axle 19 that the such endoporus 17 that connecting above-mentioned cylinder 16 of the downside of its end shown in the 4th figure cooperated, excise first half along reference edge 20 on this top of 19, and this axle 19 is engaged in the above-mentioned cylinder 16, ruler 18 and ruler 14 are that the center of circle can be hinged freely to rotate with centre of gyration S shown in the 2nd figure like that, and above-mentioned centre of gyration S is consistent with the bending point of the following measured object that will talk about.

The 21st, be engraved in above-mentioned ruler 14, length scale on 18, with the centre of gyration S consistent with bending point is that benchmark is made scale, its opposite side is with dimension figure 22, in general, it is long like that ruler 18 on one side will must be measured length to some extent, the ruler 14 of another side is done shorter so that use, ruler 14,18 length determines shown in the 2nd figure like that, is carved with scale 21 on the long ruler 18, does not graduate on the short ruler 14, but also can do growth to ruler 14, and all engrave scale 21 on two rulers.

The 23rd, measured object bends to angle arbitrarily from bending point a, acute angle or obtuse angle, and the top from bending point a to one side or both sides, perhaps the size of intermediate point all can be measured arbitrarily.

The 6th figure and the 7th figure have shown additional embodiments, among the embodiment that in the 1st figure to the 2 figure, shows, on ruler 14, ruler 18 is exceeding of class's shape, in 6,7 figure, ruler 14 and ruler 18 are in the isoplanar, therefore, after cylinder 16 and axle 19 cooperated, an end of ruler 14 and an end of ruler 18 had the interference region of 1/4 cylinder angle, so different with the embodiment shown in the 1st figure to the 3 figure, remaining structure then is identical.

The 8th figure to the 10 figure are another embodiment, and identical with shown in the 1st figure to the 3 figure is equipped with secondary chi on ruler 18 basically, can supply precision measurement, can use as vernier caliper again.

In this embodiment, on long ruler 18, is furnished with the secondary chi 24 that is free to slide, the scale 25 of this pair chi 24 can be read 1/20 millimeter size, on this pair chi 24, set up measuring claw 26, this pawl 26 is used to be close to measured point and measures, so the reference point of the scale 21 of ruler 18 is shown in the 8th figure, the difference in size that causes according to pawl 26, scale 21 is placed on the position that separates centre of gyration S one segment distance, this measuring appliance ruler 14 on one side ruler 18 such and another side shown in the 8th figure is put and is met at right angles, measured object is clipped between ruler 14 and the pawl 26, so just can as vernier caliper, measure length, in this occasion, must correctly put ruler 14 and ruler 18 and meet at right angles, shown in the 10th figure, do a vertical hole 27 of leading to cylinder 16 from ruler 14 like that in the side of ruler 14, being furnished with the front end that heads on spring 29 in this vertical hole 27 is hemispheric pin 28, there is a stop collar 30 that this pin 28 is remained on from vertical hole and stretches out its hemispheric front end, when ruler 14 and ruler 18 intersect vertically, this pin 28 and the ruler 18 inboard mating holess 31 that are provided be equipped with mutually assurance fixed angle, the angle of demonstrate,proving in order to make is constant, the bottom of cylinder 16 is provided with the slotted hole 32 of horizontal direction as the 8th figure and the 9th figure, by this slotted hole 32, stationary shaft is housed

Tube 16 and axle 19 just combine, and ruler 14 and ruler 18 can not moved, and when column cap screw 34 is loosened, the combination of cylinder 16 and 19 are removed, and ruler 14 and ruler 18 can freely rotate.

Like this, just make and begin to measure the measuring appliance that length uses from bending point and can be also used as vernier caliper.

In addition, in the various embodiments described above, the ruler 14 of measuring appliance is placed on the right side, and ruler 18 is placed on the left side, is to dispose like this, but also can be placed on the left side to ruler 14 conversely ruler 18 is placed on the right side, and each embodiment can measure arbitrarily conversely.

As mentioned above, ruler on one side is connected with cylinder, the ruler of another side is connected with axle, because the cooperation of cylinder and axle, two rulers can be articulated freely to rotate, so in the angle of a pair of ruler, do not have ridge fully, therefore, can measure the length that the bending point of the determinand of circular arc bending begins.

The top of the cylinder on the ruler that is connected on one side and the top that is connected the axle on the ruler of another side are excised first half along reference edge, like this, the angle of a pair of ruler can change in 0 ° to 180 ° scope, and can measure sweep is all measured objects at acute angle and obtuse angle.

As the secondary chi of equipment on ruler on one side, not only can do accurate measurement, can also the double as vernier calipers.

First figure is the axonometric drawing of one embodiment of the present of invention.The 2nd figure is the same planimetric map.The 3rd figure is the same front view (FV).The 4th figure is the axonometric drawing of the ruler on the same one side.The 5th figure is the axonometric drawing of the ruler of another side.The 6th figure is the planimetric map of another embodiment.The 7th figure is the same front view (FV).The 8th figure is the planimetric map of another embodiment.The 9th figure is the same outboard profile.The 10th figure is the sectional view that the same relevant angle guarantees the amplification of means.

14 is rulers on one side among the figure, the 15th, and reference edge, the 16th, cylinder, the 17th, endoporus, the 18th, the ruler of another side, the 19th, axle, the 20th, reference edge, the 21st, scale.

Claims (2)

1, a kind of measuring appliance is by one the ruler (14) of reference edge (15) and the ruler (18) that another root has reference edge (20) to be arranged, the axle (19) that the cylinder (16) of ining succession by an above-mentioned ruler (14) end downside and above-mentioned another root ruler (18) end downside are ined succession cooperates, the phase mutual energy is articulated freely to rotate, on one or two rulers with this center of rotation (S) as benchmark, be carved with the length scale, it is characterized by, the center of above-mentioned cylinder (16) (S) is arranged on the reference edge (15) of an above-mentioned ruler (14), simultaneously the top of above-mentioned cylinder (16) is begun to cut first half by reference edge (15), the center (S) of above-mentioned axle (19) is arranged on the reference edge (20) of above-mentioned another root ruler (18), simultaneously the top of above-mentioned axle (19) is begun to cut first half by reference edge (20), making the semi-circular cut-out that conforms to the endoporus of above-mentioned cylinder (16) on the reference edge (15) of an above-mentioned ruler (14).

2, as the measuring appliance in the claim 1, it is characterized by, on above-mentioned any ruler, secondary chi is housed.

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