DE114946C - - Google Patents

Description

PATENT OFFICE.

Patent specification

CLASS 14 /

HEINRICH HOCKE in ZURICH. Compulsory valve control.

Fatentirt in the German Empire on February 22, 1900.

The subject of the invention is a positive valve control, which is very simple, with an extremely low impact on the regulator and can be used for all degrees of filling is. .

An exemplary embodiment of the subject matter of the invention is shown in FIG. 3, while Fig. Ι and 2 show schematic representations for different degrees of filling.

As can be seen from Fig. 3, two links c and d are hinged to the eccentric ring α of the control eccentric b , of which c is connected to the upper end of a coulisse f swinging around e, d with a stone g guided in the coulisse. The point of application h of the link c on the eccentric ring is also the point of application of the valve pull rod i, which is connected to the valve rod m by the lever / supported on the rolling path k. The regulator rod η is hinged to the coulisse stone g.

By the rotation of the eccentric b Coulisse is vibrated at the same time by the handlebars of the eccentric locking collar to an oscillation about the moving point of d ο of the handlebar d of the eccentric locking collar is forced.

Depending on the size or Type of movement of point 0, which depends on the position of the coulisse stone determined by the regulator, the approximately elliptical path of point h will have a shape which determines the size of the filling.

1 and 2, the points h ¹ and o ¹ analogous to points h and 0 are drawn as being arranged at a rigid angle a ¹ and moved by a crank b ¹ corresponding to the eccentricity of the control eccentric, c ¹ and d ^l correspond to links c and d. f ¹ is the coulisse, g ¹ the coulisse stone and w ¹ the rod leading to the controller, while z ¹ corresponds to the valve pull rod.

The strongly extended position of the crank b ^l and the angle a ^l corresponds to the beginning of the pre-opening and the coulisse is shaped like a circular arc, which is struck from point 0 in this position.

In 'Fig. Ι the coulisse stone is drawn ^{in its greatest distance from the pivot point e 1.}

As the crank b ^{1 continues} to move in the direction of the arrow, the angle a ^{1 is moved in} such a way that the point o ¹ almost describes an arc of a circle and the point h ¹ a flat ellipse. If the arc χ is thought to come from the upper point of application of the valve pull rod at the beginning of the pre-opening, it can be seen that the lower point of application h ¹ does not come under this arc χ , i.e. the valve rod is not pulled downwards. This position therefore corresponds to zero filling.

In Fig. 2 the coulisse stone is moved near the pivot point e ^{1 of} the coulisse. Here the: point o ^{1 describes} an approximately upright ellipse and the point h ¹ also describes a more perpendicular ellipse.

The path of point h ¹ falls to a large extent below the circular arc x, so the valve rod is pulled downwards during the passage through it, which corresponds to a greater degree of filling.

If the coulisse stone were to coincide with the pivot point of the coulisse, the point o ^{1 would describe} an arc around the point g- ¹ and the filling would be even larger, as the path of the point h ¹ would fall even further under the arc χ.

The Coulisse could be extended downwardly but also about the pivot point e ¹ addition and the Coulissenstein be positioned so the pivot point e ¹ DAF between the Coulissenstein and the engagement point of the arm c ¹ fell, could be further vergröfsert whereby the filling.

It is then possible to achieve any desired degree of filling from ο to 100 °.

Since the coulisse is designed according to an arc drawn from point ο at the beginning of the opening, at the beginning of the opening, where the valve is not yet relieved of the steam pressure, i.e. the greatest resistance has to be overcome, there is no reaction on the controller because the direction of the pull exerted by the link d coincides with the radius of the coulisse and a component in the direction of the coulisse does not occur.

. Since only a relatively short distance from the coulisse is used to adjust the stone for the filling degrees that occur in practice, it can also be straight instead of curved in the interests of ease of execution, whereby the path of the stone can be chosen so that it is at the beginning of the Pre-opening is directed normal to the handlebar d, in the position of the coulisse stone corresponding to the most frequently occurring degree of filling. With the other degrees of filling that occur, the path mentioned will then deviate only slightly from the normal to the handlebar at the beginning of the pre-opening and the reaction on the controller will be extremely small.

Claims (1)

Patent claim: Positive valve control, characterized in that a coulisse (b) is replaced by a with. The link (c ) connected to the eccentric ring (a) of the control eccentric (b) is caused to vibrate and a link (d), which is influenced by the controller, is guided by a stone (g) in the coulisse (f) and is also connected to the eccentric ring, each according to the position of the point of application on the coulisse determined by the controller, influences the movement of the eccentric ring in such a way that the point of application (h) of the valve tie rod (i) on the eccentric ring executes a movement corresponding to the respective degree of filling. For this purpose ι sheet of drawings.