DE246260C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- Ju 246260 CLASS 2Oi. GROUP

SIEMENS & HALSKE AKT-GES. in Berlin.

Electric block key lock. Patented in the German Empire on March 10, 1911.

The object of the invention aims to solve two for block operation important tasks:

1. Blocking should be independent of the length of time the block key is held down by the guard,

2. by pressing the button once, only one unblocking of the receiving Fields be possible.

ίο These two tasks are performed by the electrical block key lock on the following Way solved:

1. by automatically holding the block key in the pressed position during the Blocking,

2. by an automatic interruption of the circuit after the blocking is complete, which can only be closed again after going up and pressing the control button again ^.

As the embodiment (Fig. 1) shows, the electrical closure is produced by an electromagnet that holds the pushbutton of the block field in the pressed position. The magnet is switched off and the button is released again only after all fields that work together have been blocked. The current flow when pressing button I is as follows: From battery B via contact ^, ^ ₁ , line I ₂ to r _v d ₂ , to electromagnet M ₁ , to return line R. The armature m _x remains attracted, so the button is depressed. The block current now goes from the inductor J ₁ via contact ^, block field a, line I ₁ , block field b and via contact d _s to the return line R. This current circuit remains until the field b is free of its high-going locking bar, the battery current to the electromagnet interrupted by contact r ₂ . The magnet is de-energized, button I with push rod jump up and open the block _{current circuit through contact ^ 1.}

Since the blocking takes place automatically in this way, it is advisable to replace the inductor J ₁ (J ₂ ) with an automatic power source, e.g. B. either to take alternating current from any network or, if only direct current is available, to use a rotary converter. The connection to the mains is effected in a simple manner by a contact on the push rod.

Should the alternating current fail due to any disturbance, you can use a Hand crank inductor current can be sent into the block fields.

From the circuit indicated it is readily apparent that the shutter causing the lock Electromagnet can be made dependent on any number of fields.

In order to reduce the duration of the connection of the current to on if a block field fails to a certain extent so that the block key is not pressed for too long A time switch can be installed in the line of the blocking magnet

known execution are inserted, the j the current after a certain time interrupts.

The electrical block key lock has, as is readily apparent from FIG. 5, compared to mechanical ones Facilities of this type have the advantage of greater security. It also offers a convenient Means of checking the correct mode of operation of all block fields working together,

ίο because it first lets the control key become free, when all fields have worked correctly.

The lock is indicated in Fig. Ι by an electromagnet holding the button directly. However, this embodiment is irrelevant to the subject matter of the invention. For example, the button could also be held in place by a pawl t _x (FIG. 2), which is triggered electrically after it has been blocked. This can be done by means of an electromagnetic M ₁ (FIG. 2) to be switched on by the working fields or by means of a special block field c (FIG. 3). The embodiment according to FIG. 2 does not require any further explanation.

In addition to the usual block contacts, the embodiment according to FIG. 3 also has a special one Contact type, which has the purpose of continuing the current to a second Field of the correct work of the previous

30 'gone addict.

In the figure, the field α is shown in the unblocked position, the field b in the blocked position with upright keys I and II. The contact U ₁ , referred to below as the arithmetic contact, is known to be influenced by the rake and the push rod in such a way that it triggers the in the circuit of Fig. 3 drawn rest position only leaves when the push rod is depressed and the rake has arrived in the blocked position. The blocking of the block fields in the pressed position is effected here by the special field c (Fig. 3), which receives power only after all fields that work together have been blocked and then in turn blocks it. By pressing button I, the locking bar υ at V ₁ , T _{1 is} withdrawn from the support. The rod ν is prevented from moving downwards by the lock holder β. The key I is held in the depressed position by means of a locking lever h on T _2.

After blocking has been completed, i.e. after the rake has been completely rotated, the closure container e rotates, the rod ν jumps downwards, strikes the angle lever h, so that it closes the push rods of the start and end field (holding field) and the control button I coupled to them Releases upward movement. At the same time as the push rod goes up, the rake of the retaining field C _{1 is also} taken up. The lock holder e is previously turned outwards again by the rod ν and, when pressed again, lies against the rake axis until another current is sent into the field and the rake has fallen down, tooth by tooth.

The current flow when pressing the key, for example I, is as follows according to FIG. 3: From inductor J ₁ via A _x , field α to return line ^ i? until the field is blocked; then automatic forwarding of the alternating current by the computing contact U ₁ via line I ₁ to field b via contact d _v r ₂ , R; b becomes free. The up-going locking bar switches the current by means of r ₂ via line I ₂ to the holding field C ₁ , so that the blocking is now removed by unblocking this field and key I returns to the rest position.

In order to avoid wear and to increase operational safety, the locking lever h is expediently provided with an articulated extension A ₁ according to FIG. 3a, which articulately engages in T _2. The dropping bar ν then kinks the joint.

Instead of a special holding field, the keys could be locked in the pressed position Location can also be reached by a facility on the block fields themselves.

The key lock described does not prevent the Block attendant may cause a power short by holding down the block buttons for a longer period of time able to produce, which gives rise to disturbances. This drawback becomes according to the invention This eliminates the repeated occurrence of the block circuit from the complete opening of the blocked key and is made dependent on its repeated presses.

This dependency can be achieved in a number of ways. Initially through a contact that is switched on in the block circuit, which is automatically interrupted after blocking, even if the control button is pressed, and is only closed again after releasing and pressing the button again. Another type prevents the repeated current 'shipment pressed only once through "° such a connection of two co-operating alternately as a transmitter and as a receiver acting block fields in that the closed from the encoder circuit by pressing the receiving field is interrupted ¹¹ S.

An embodiment of the first type is shown in FIG.

At the end connected to the T key lever ₁ ^ ₁ occur nor the three-arm lever i _x

with the contacts k _n and Jt ₁₂ and the tow pawl M ₁ , which keeps _{contact W 12} closed in the rest position; Finally, the auxiliary relay P ₁ , which rotates the three-armed lever I ₁ when excited, is connected behind the blocking magnet M _1. The key T ₂ is drawn in the depressed position.

By pressing the button T ₂ , field II, the locking magnet M _{2 is} energized, and the button

ίο is being held. The auxiliary relay ft _{2 also} receives current and, by turning the lever i ₂ with the two contact arms, closes the contact k _2% and connects the block current to the fields through contact A ₂₁ . The third horizontal arm of the lever i ₂ , however, _{lifted the tow pawl M 2} upwards during its movement and thereby opened contact M ₂₂ . The current flows from battery B ₂ via push rod contact d ₂₂ via k ₂₂ to magnet M ₂ , relay p ₂ and via locking rod contact r _n of receiving field I to earth, the block current also remains switched on via contact A ₂₁ . If the magnetic circuit is now interrupted after the blocking activity has been completed by the locking bars of the receiving field going up and at f _u , relay p ₂ is also de-energized, lever i ₂ jumps back to its original position and opens the block _{current at A 21} . This is therefore, regardless of whether the key is held in the pressed position or not, automatically interrupted after the blocking is complete.

The block circuit can only come about for the second time when the magnet p ₂ attracts its armature and rotates the lever i _2. For this, however, the contact M ₂₂ must first be closed, via which the magnet can receive p _{% current.} This contact is only closed again by the upward-going button T ₂ , which moves the tow pawl back with its lever arm g _2. The attendant can therefore only cause a single release after pressing the button once.

With this arrangement, the repeated tightening of the auxiliary armature i ₂ and the closing of the block circuit is prevented by the interaction of two contacts.

Figs. 5 and 6 show a device in which the same purpose by a kinematic Funds is obtained. .

Claims (8)

Patent Claims: 1. Electrical block key lock, characterized in that the control key is held in the depressed position by an electrical lock. 2. Block key lock according to claim i, characterized in that the key lock is only eliminated after the entire block activity has expired. 3. Block key lock according to claim i, characterized in that the block key is held in place by an electromagnet (M ₁ , M ₂ ) which is switched on when the key is depressed (Fig. 1). 4. Block key lock according to claim 1, characterized by one when pressing mechanically engaged with the control button, electrically triggered after blocking Lock (Fig. 2). 5. Block key lock according to claim 4, characterized in that the mechanisehe Block is triggered by a block field. 6. Block key lock according to claim 1, characterized in that an electromagnetic armature (i _x , i ₂ , Fig. 4), which is independent of the pressed transmitter key, drops out after blocking and interrupts the block circuit in order to repeat the current transmission depending on the repetition of the giving do. 7. Block key lock according to claim 6, characterized in that the repeated Tightening of the independent anchor by one of itself when it falls off interrupted contact is prevented and is only enabled again when the button is raised. 8. Block key lock according to claim 6, characterized by a mechanical Repeat lock for the anchor independent of the key. 1 sheet of drawings.