DE396270C - Switching device for electric motor chimes drive - Google Patents

Description

Switching device for electric motor chime drive. Present invention refers to an automatic switching device for bells.

It is known to drive bells mechanically, e.g. B. by means of an electric motor. For this purpose, the motor and the bell axis are z. B. by belt and cord with each other tied together. The motor gets running in one or both directions. Current. The current short is usually only during part of the bell stroke and is temporarily canceled completely to prevent the bell from ringing.

The present invention sees. Drive by means of a belt or cord before; the motor only receives current in one direction. In the rest position of the bell the circuit on the bell cage is switched on. Closing and interrupting the main circuit can be made at the foot of the tower.

The novelty and peculiarity of the present invention is that with the bell axis a three-part lever, of which the middle and lower part on both sides in the longitudinal directions of the bell axis, and the lower part as well can be rotated in a direction transverse to the bell axis, is firmly connected, which during the pulling period of the motor straightened over one of the actuators the switching contacts serving circular lever arm, the inner circular area in the switch-on position of the contacts conveying the current circuit concentric to the Bell axis lies, grinds and the lever arm pressing down the Stromschlusskon contacts pushes against each other and closes the motor current.

In the idle period of the engine, the lower end of the lever is through Friction on the circular lever arm rotated transversely to the bell axis, and the effective The total length of the three-part lever is thus shortened, which results in it has that the circular lever is released upwards, whereby the stiomschluss stops.

In order to straighten the lower end of the lever when transitioning into the The pulling period of the motor will ensure the appropriate direction of movement inner circular surface provided with a number of sawtooth-like surfaces. The purpose of these surfaces is to obtuse the angle of attack between the end of the lever and the surface shape, whereby an unintentional sliding of the lever end over the circular area is avoided.

Further the inner circular area becomes with a number of deeper cuts which are intended to turn on the current by releasing the circular lever the places where the engine torque reaches a certain maximum value has to interrupt in order to prevent an overload "of the motor. After the interruption of the current the bell swings back immediately. Would the described The process takes place continuously, the bell rash would get bigger and bigger, and the bell would finally ring. To prevent this from happening, will the device provided with a curve guide, such that the two lower Ends of the three-part lever as soon as they reach a certain maximum stroke of the Swing the bell over the curve guide, laterally in the axis longitudinal device be pushed away and in the decline by the curve guide on the side of the circular Lever to be passed.

The circular lever is now not pressed down, the current circuit is suspended. This process is repeated until the stop is reached again is normal; then the normal switching process starts again.

Fig.z shows the switching device (in the direction of the bell axis) in connection with the motor, bell axis and bell, Fig. 3 the oscillating part of the Switching device only in side view.

Fig. 2 shows the way to cancel the normal switching process occurring current circuit at the highest permissible swing of the bell Cornering. In Fig.q. the circuit is shown.

Fig. 5 shows the current connections over time during the bell oscillations. In Fig. 6 is the position of the lever parts of the switching device when the circuit is open (Idle oscillation of the bell), in Fig. 7 the position of the lever parts when the lever is closed Circuit (drive vibration of the bell) shown.

The bell axis a carries a triple lever b, c, d. The upper joint a, a enables the lever parts c and d to move in both directions along the axis, and the lower joint b, b also enables the lever part d to move in one direction (to the left in the illustration).

The lever parts c and d (Fig. _) Are in the axial direction (perpendicular to the plane of the paper) from the straight line A-B (marked in Fig. 2) movable; you will be in the straight line A-B by the leaf spring e and two firmly attached to the lever part b this enclosing, held on the lever part c seated pins.

The lower lever part d is also by itself transversely to the bell axis arranged to be movable in one direction (to the left in the drawing) from the straight line A-B, and it is drawn into the straight line by the spring f and held here against stop x.

If the lever part d is moved to the left by pressure at the lower end, then this part rotates alone and forms an obtuse angle with parts b and c; on the other hand, if the lever part is moved to the right, the stop x takes the lever parts b and c with it; the whole lever b, c, d turns to the right.

A circular, one-armed lever h is rotatably arranged about a fixed axis g. The inner circular surface is designed and the lever arm is mounted to the axis so that the inner circular surface in the position shown, so when the three lever parts b, c and d are in a straight line (AB) to each other and the inner circular surface against the lower end of the Lever part d is applied, is concentric to the bell axis a. This has the consequence that the lever arm h does not change its position during a left-hand movement of the lever arm b, c, d.

In this lowest position, the rotatable robe m, which is fixedly attached to the lever h , presses the double-armed lever k, which is attached underneath and rotatable about the fixed pivot point 1, downwards, whereby the contacts o and y which cause the current are pressed together and the circuit is closed.

The fixed contact o is isolated on the base plate of the switching device, the movable contact y secured to the lever arm k in an isolated manner by means of the leaf spring ii.

If the lever end d is rotated to the left in relation to the lever parts b and c during the rightward movement of the lever parts b and c due to the friction on the inner circular surface of the lever h (in the dot-dash position, Fig.r), the effective length of the lever becomes b, c, d, that is, the distance between the lower end of the lever part d and the axis a is shortened; the spring i acting on the right end of the double lever k pulls the left end of the lever k and the roller na and the lever h so far upwards that the connection between the contacts o and y is canceled. The upward movement of the lever k is limited by the stop j.

Depending on the number of circuits to be interrupted, the corresponding Number of contact pairs attached.

The mechanical switching process described is shown in Figs. 6 and 7 shown.

If the lever b, c, d is turned to the right through the bell axis a (Fig. 6), the lower end of the lever part d rubs against the inner circular surface of the lever arm h. As a result of the friction between d and h, the lever part d is rotated to the left with respect to parts b and c, whereby the effective length of the entire lever b, c, d is shortened. The lever arm h is pulled up by the spring i, the lever k and the roller m, the contacts o and y are removed from each other. The circuit is broken. If the lever b, c, d is moved to the left (Fig. 7), the lever part d becomes the lever arm due to the friction aii. h, supported by the spring f, is drawn to the right into the straight line AB and held here against stop x. The effective length of the lever b, c, d is increased compared to the position in Fig. 6. As a result, the lever arm h and the lever arm k is pressed down by the roller m. Contacts o and y are closed.

The circuit is shown in Fig. Q. shown for one line. v is the Drive motor, w the power source.

In order to prevent unintentional sliding of the lower end of the lever part d in a bent position on the inner surface of the lever array h during the left movement of the lever b, c, d (Fig. 7), so to straighten the lever part d into the straight line AB To ensure that the inner circular surface of the lever arm lt is provided with short, flat, sawtooth-like surfaces -z. The intended purpose is achieved in that the lever d forms a more obtuse angle with these surfaces than with the respective tangent to the inner circular surface through the point of contact between the end of the lever and the circular surface.

A larger section p in the inner circular surface of the lever arm k is used to cancel the current circuit when the torque of the motor is the highest due to the increasing inclination of the bell u during the first drive. has reached the permissible value. Arrived at the cutout P, the lever b, c, d releases the lever arm Ja upwards; the power supply is interrupted (see Fig. S at the top). The bell swings back to the right; around. at the next .Linksschwingung in the manner described by straightening the lever part d to bring about the current circuit by depressing the lever arm h again.

Since the current circuit now lasts longer and the bell passes the vertical position with a certain speed , the switching lever b, c, d, is driven over the cutout, the current circuit is restored, and the motor is now able without exceeding the permissible torque, to enlarge the bell rash (Fig. 5-, second left movement). Going beyond the left end of the lever arm h, the lever b, c, d releases the lever arm h, the flow closure is canceled and the bell can swing back again after it has swung out.

Depending on the size of the bell, several cutouts p are made, in order to achieve the greatest amplitude in several stages.

For the sake of simplicity, the contact spring n, or several, depending on the number of lines to be interrupted, directly on the lever arm. k attached as indicated by the contact spring q.

The lower mechanism (i, k and m), - which only serves to increase the small movement of the lever arm h, then falls away; the spring then acts directly on the lever h - .

The switching process is summarized. In the rest position of the bell u, the lever arm h is pressed downwards by the straightened lever b, c, d; the double lever k with contact spring n and contact y is moved downwards by the pressure roller m, whereby the contacts o and y are pressed together and the circuit is closed. As soon as the main switch is closed, the motor starts up. -By the mechanical connection of the motor v with the bell axis a, the bell u and the Iheifach lever b, c, d , firmly connected to the axis a, are set in rotating motion, in the drawing from right to left (drive direction).

The more the bell is swiveled out of the rest position, the greater the torque to be overcome by the motor. In the position of the lever b, c, d, in which the maximum permissible torque (during the first stroke) is reached, a cutout P is made opposite the lever b, c, d in the lever arm h. The lever arm h can therefore go up here; the current is interrupted because the lever arm k and the contact y follow the upward movement. The bell does not yet have enough momentum to move lever b, c, d over the cutout; the bell rings back.

Due to the friction between the lever end d uhd lever arm h , the lever end d is rotated out of the straight line AB and slides over the lever arm h during clockwise rotation without pressing it down, since the effective length of the lever b, c, d is shortened. Contacts o and y remain open.

At the end of the idle stroke the bell turns back; Due to the friction on the lever arm h, the lever end d straightens during the left-hand movement (into the straight line AB), pushes, since the effective length of the lever b, c, d is now increased, the lever arm h down and closes by pressing the contacts together o and y the stream. The bell gets, because the current circuit begins before the rest position and the motor thus pulls during a longer period of oscillation, a greater momentum, which brings the lever b, c, d in the left movement over the cutout; The lever arm h is pushed down again and the engine power starts again until the lever b, c, d disengages from the lever h in another left gear (third and fourth left gear, Fig. 5). The bell rings and returns. The game starts all over again.

In order to prevent an excessive amplitude, the lever c, d, as soon as the greatest permissible deflection is reached, is guided by a curve r, which the lever c, d freely passes during the normal switching process ($ position i, Fig. 2 ), pushed to the side, in the drawing to the rear, and brought by the enlarged bell deflection over the end of the curve guide on the right in the drawing and pulled back into the straight line AB by the leaf spring e (position 2, Fig. 2). The lever c, d is now in such a way that when going back (to the left) it is pushed forward by the curve guide y and is brought out of engagement with the lever arm h (position 3, Fig. 2). During the entire left-hand drive, the power supply is canceled; the bell is also not driven in this direction of oscillation (fifth left-hand gear, Fig. 5). The amplitude becomes smaller.

Having passed the left end of the curve guide y, the leaf spring e brings the lever c, d back into the straight position (position 4, Fig. 2); the lever slides over the lever arm h during clockwise rotation without, however, pressing it down because the end of the lever d is bent. If the amplitude is still too great, the lever c, d is again guided over the right end of the curve guide y in order to be pushed forward again. This is repeated until the bell has reached a minimum value.Then the normal shifting process occurs again (sixth left gear, Fig. 5), because lever c, d no longer comes over the right end of the curve guide, and therefore does not more is pushed away.

In order to avoid sticking of the lever c, d at the ends of the curve guide y, these are designed like a knife; the point of the lever part c sliding on the guide r is designed in the shape of a lens (see section S, Fig. 2).

This point of the lever part c can also be provided with an enclosing Role can be provided, whereby the same purpose is achieved.

Claims (4)

PATENT CLAIMS: i. Switching device for electric motor chime drive, characterized in that a three-part lever (b, c, d ) firmly connected to the bell axis (a), of which the middle and lower part (c, d) on both sides in the longitudinal directions of the bell axis and the lower part (d) can also be rotated in a direction transverse to the bell axis, straightened during the pulling period of the motor via a circular lever arm (h) serving to actuate the switching contacts, the inner circular surface of which is concentric to the bell axis in the switched-on position of the contacts providing the current circuit lies, grinds and pushes the lever arm (h) down and presses the current connection contacts against each other and under the idle period of the motor, during which the lower end of the lever (d) is twisted by friction on the lever arm (h) transversely to the bell axis and thus a shortening of the effective length of the Lever (b, c, d) , the @ Lever (h) releases upwards and the power supply is canceled. 2. Device according to claim i, characterized characterized in that the circular lever (h) with a series of sawtooth-like Areas (z) is provided, which by the obtuse angle of attack between the lever part (d) and inner surface of the lever (h) straightening the lever end (d) at the transition in the direction of movement corresponding to the pulling period of the motor. 3. Device according to claim i and 2, characterized in that the circular Lever arm (h) is provided with a number of deeper cuts (P), which initially when starting the bell when the lever end (d) is during grinding reached the corresponding cutout via the lever arm (h), a release of the Effect lever arm upwards and the current interrupted as soon as the motor power reached a certain height due to the increasing torque of the bell. 4th Device according to claim 1, 2 and 3, characterized in that the two lower Lever parts (c and d) by means of a curve guide (y) by forcing in the longitudinal direction the bell axis during the pulling period of the motor out of engagement with the current connection contacts actuating lever arm (h) when the swing height of the bell is a exceeds a certain height.