DE264363C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- JVr 264363 - CLASS 83 b. GROUP

AUGUST KUHL in VELTEN i. d. Mark.

Time intervals.

Patented in the German Empire on October 26, 1912.

The invention relates to a clock-switched contact device which is particularly suitable for a relatively small and weak drive clockwork to control a motor-driven contact mechanism, which is particularly useful for time switches Clocks should serve to display the time by means of illuminated boards. According to the spatial separation between clock drive and

ίο Contact switching mechanism is with such devices there is so much dead gear that a relatively large free stroke is required is. This free stroke is achieved in that the drive in the manner of the known Arithmetic triggering takes place by placing three with each other between the clockwork and the contact switching mechanism cooperating levers are switched on, of which the contact-carrying rake lever with a double start to Falling is brought down.

The falling of the rake lever, which is selected according to the above with a correspondingly high Hube taking place would result in a strong fall falling on the weak Drive clockwork would have a detrimental effect. The invention now aims at this disadvantageous to prevent a severe fall of the contact switching mechanism and achieves this by the staggered design of the teeth of the rake hebeis in cooperation with the double run-up given to this arithmetic lever.

A double attempt is on, already It is common for striking mechanisms to trigger a sudden release when falling off the cam to accomplish. The advantage of the invention, however, lies in the interaction of the Double start with the intermittent case that has the advantageous effects already described has the consequence. Another advantage of the invention is that a direct circuit on the locking bracket comes into effect, compared to the indirect switching that would otherwise be preferred.

The drawing shows an embodiment of the inventive concept, namely:

Fig. Ι a side view of the entire front? direction with disengaged contact lever,

Fig. 2 is a side view of the contact lever and its locking bracket in half-indented State,

3 shows the same side view shortly before the contact lever is fully engaged,

4 shows a schematic plan view of the device.

• α is a clockwork of the usual type which sets a thumb c in rotation by means of a drive wheel b , whereby in the present case it should be assumed that a single rotation of the thumb c takes one minute. In the case of the clockwork, an angle lever d ¹ d ^{2 is} rotatably mounted on the axis e , on one arm d ^{1 of} which the thumb c presses after each rotation, while the arm d ² on the flat end f ^{1 of} a double lever f ¹ f ² rests, which is rotatably mounted in the middle. The other end f ^{2 of} the double lever is formed into a pawl g, which is in teeth k of the

Arm i of the contact lever o ¹ o ² engages. A bracket k is also rigidly attached to the arm f ² , which grips from the other side over the arm i by leaning against it from the rear. The arm i is held between the tooth g and the bracket h when the double lever f ¹ f ² is in the position shown in Fig. Ι, ie before it is under the thumb c

ίο Mediation of the angle lever d ¹ d ² is pivoted forward from its position in the direction of the line y. The contact lever o ¹ o ² , the around. the axis of rotation f is pivotable, has two plunger pins m ¹ , m ² , which are conductively connected to one another in the manner of a bow-like contact and, when the contact lever o ¹ falls, they split into two with mercury.

»Immerse filled vessels n ¹ , n ² , which are each connected in a known manner to one half of the line w ^x , which is switched on when the contact is closed by bridging the two mercury cells by means of the contact pins m ¹ , m ² . In the line w ^{x there} is a small electric motor w whose shaft χ, indicated by a dash-dotted line in FIG. 4, drives a spindle r which has a switching tooth r ¹ at its end. Of the

> Switching tooth r ¹ causes a further switching of a rotary coke o.

The arm i of the contact lever is circular in the radius of its distance from the rotary

. points p of the lever o ¹ bent, so it has the shape of an arc of a circle. The front edge of the arm is provided with several, in the present case four, teeth k , which gradually become longer from bottom to top. Since the

■ :. Thumb c does not advance continuously, but in jerks, as is always the case when a clock is running, so the locking bracket g is not lifted suddenly but intermittently from the teeth k. In this way, one tooth after the other falls on the locking tooth g in stages, the contact lever o ¹ slowly falling down without exerting a significant impact on the locking mechanism. As soon as the pawl g has left the top of the teeth k , the notch on the back of the arm i above the last tooth k falls on the bracket h (FIG. 2), so that even after the double lever f has been pushed forward ¹ f ² is not yet fully released until the end position of the contact lever o ^1. Only after the blade-like leading edge of the thumb c is advanced so far that it just passes the edge of the lever arm d ¹ , the double lever f ¹ f ² is pushed back again by the weight of the contact ^{lever o 1} resting on it, and now it is the distance between the pawl g and the bracket f ² has become so large that the incision I also releases the bracket, so that at this moment the contact arm o ¹ can freely fall down, with the contact pins m ¹ , m ² now - in the mercury wells Immerse n ¹ , n ² and close the line w ^x. In this way it is achieved that not only is the triggering of the contact lever momentarily always at the same point, but also that the contact is prevented from sticking because the contact lever itself forcibly pushes back the blocking at the appropriate moment by its own weight.

The continuation o ^{2 of} the contact lever is coupled to a spindle t by means of a chain q, which winds itself on a chain drum s, which after a single revolution of the spindle r is pushed open by an arm υ attached to this spindle on a protruding arm u of the spindle t this is set in rotation so far that by tightening the chain q the contact pins m- are lifted and the contact lever o ^{1 is} returned to its initial position, whereby the motor w switches off by itself and the device is brought back to the ready position.

Claims (1)

Patent claim: Device driven by a clock for switching contacts at equal time intervals, especially for minute switches in clocks, characterized in that three levers are provided which work together in the manner of the known arithmetic triggering, of which the trigger lever (f ¹ ) driven by the clockwork is a locking bracket (h) , which in turn triggers a rake lever (k) carrying the contact with a double start-up, whereby when the locking bracket is swung out ff ¹ , h) as a result of the triggering movement of the rake lever fk), the rake teeth are released stepwise through the stepped design of the rake teeth, with the acceleration of gravity being canceled as much as possible . 1 sheet of drawings.