DE14310C - Automatic, slow-striking electric bell - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 83: Clocks.

Patented in the German Empire by ia. August 1880.

The invention aims at an electrical bell for house and train telegraphs to sound the bell with separate slow strikes, without doing so it becomes necessary to wind up a clockwork (as with the railway signal telegraph).

The hammer strikes the bell quickly and then slowly goes back to the original one Position backward ^ when he has reached this extreme position, he becomes quick again rang the bell and so on

The electric current, coming from the battery, goes from the clamping screw X ¹ to the spring F ¹ screwed onto the board P ; this carries the usual contact button from Piatina at the top, which is opposite to that on the spring F ² . This spring is isolated from the plate P by the rubber plate B. From here the current goes through the wire spirals of the electromagnet and finally to the clamping screw K? and from there back to the battery.

Assuming that the current is closed by the normally open contact of a relay, the armature A is attracted by the magnet and the hammer H strikes the bell G. Accordingly, the parts of the whole apparatus have the positions as shown in FIG.

The handle H ^{1 of} the hammer, which is connected to the anchor, is namely extended upwards and carries the pin h and the pawl k there. The pin A engages the end of a slide 5, this moves horizontally in guides on the board P and carries the pin s ¹ . This little pen has a double function, firstly in its extreme position on the left, Fig. 1, it lifts the spring F ³ in the air by touching a small nose f with an inclined lower surface; secondly, in its extreme position on the right, it presses Fig. 2, the spring .F ¹ back, so that it is held back by the always downwardly pressing spring F ^s , until the pin s ¹ from its return path from right to left hits the nose again / and the spring F ³ lifts up, whereby F ^{1 is} free and snaps on the spring F ² , thereby closing the current again.

The hammer does not strike the bell, as is the case with the now common house telegraphs, continually, i.e. in very short intervals, but one hears individual, clearly marked blows: the anchor snaps when becoming magnetic rapidly from the position of FIG. 1 to the position of FIG. 2, the current is then interrupted and the return of the armature from the position of FIG. 2 to the position Fig. Ι takes place very slowly, because the same is inhibited on its decline, namely by the following device, which, in Fig. 4

seen from behind, is shown with the rear plate removed. As already noted, the upper part of the hammer handle H ¹ carries the movable pawl K, which is always pressed into the toothing of the wheel R ^{1 by a spring;} this wheel engages in the small gear R ² , which sits on a common shaft with the ratchet wheel R ^3. This ratchet wheel moves the escapement E, on which the pendulum P ¹ depends, whose ball BEZW. Lens is adjustable.

If the armature is now attracted by the magnet, the pawl k hops from left to right over several teeth of the wheel R ¹ until the position in FIG. 2 is reached. In this position, as will be explained in the following, the current is interrupted, so the magnet no longer attracts the armature. The return of the armature to the position Fig. Ι takes place by the known spiral tension spring Z, but not quickly, as with ordinary bells, but very slowly. After the pawl K is fixed in the teeth of R ^1; the escapement moves R ¹ slowly in the direction of the arrow; this forms the inhibition of the anchor on its retreat. The slide S also takes part in this movement of the anchor; its outermost position on the right, Fig. 2, is limited by the stop of the armature on the magnet and is characterized by the stop of the pin s' on the spring F ¹ . The outermost position on the left, Fig. 1, is limited by the stop of a pin or button s " on one of the guides of the slide and is characterized by the lifting of the spring F ³ by the pin s'. Two screws, which h between them the movement of 5 can be regulated at will.

The mode of operation of the apparatus is therefore as follows:

Fig. Ι shows the rest position of the apparatus: the contact between F ¹ and F ² is established and the spring F ³ is raised by s' .

If the current is now closed on a relay, the armature is attracted and snaps into the position of FIG. 2 and the first stroke of the bell sounds. During this movement, in which the slide also participates by being moved to the right by the pin h on the hammer handle H ' , the pin s' first releases the spring F ^z , so that it sinks down; at the end of the movement of S s' presses the spring F ¹ back, the contact between F ¹ and F ² is released, ie, the current is interrupted and remains interrupted during the slow decline of the slide defined by the spiral spring Z is selected from inhibition by the escapement takes place; when the pin s' moves away from F ¹ and to the left, this spring is held back by the spring F ³ and the current remains closed. Only at the end of the slow movement of the slide 'from right to left is F ³ by s', lifted which f stöfst to the nose in the height, characterized F ¹ is released and snaps back against F ^2, the current is closed again and the anchor tightened again; the bell hits the second time, and so on

So the bell sounds with slow beats, the gaps between the individual beats are longer or shorter, depending on whether the pendulum weight is set lower or higher; the inhibited backward movement of the armature then takes place more slowly or more rapidly. By adjusting the large screw s ^x at the end of S one can let the electric circuit occur sooner or later.

If you connect the wire coming from the clamping screw K ^x to the spring F ¹ , you can let the bell make more or less strokes one after the other. This spring grinds namely on the side surface of the wheel R ¹ , in which a number of insulating pins rr are embedded. Every time such a spring passes the spring F ^ , it is lifted away from the metal surface of the wheel and the current is interrupted, and the bell makes more or less successive blows, depending on the number of insulating pins.

Fig. 3 is a right side view of the apparatus.

Claims (2)

PATENT CLAIMS: 1. In electric bells, which should give slow, distinctly separate bells, the devices to inhibit the armature of the electromagnet on its return, consisting in the pawl K on the upper part of the hammer handle, which engages in the teeth of the wheel R ¹ , this Wheel through the escapement E with pendulum P ^{1 is moved} by means of the wheels R ³ and R ² . 2. The devices for automatically closing and interrupting the current by the movement of the armature, consisting in the slide S, the movement of which can be regulated by the screw ί, a pin s' on the slide at the end of its movement, the spring F ¹ pushes away from the spring F ² , so that the current is interrupted and also remains interrupted with the slow decline of the slide, since a third spring F ³ holds the spring F ^s in the pushed back position until at the end of the slide's decline the pin s' hits a nose / with an inclined lower surface and thereby the spring F ³ lifts up, so that it releases the spring F ¹ and the latter snaps back onto F ¹ and the current is thus closed again.
The spring F ⁱ in connection with the wheel R provided with insulating buttons r, by means of which it is achieved that the bell makes more or less strikes one after the other. For this purpose I sheet drawings.