DE1021462B - Contact device for dynamo-electric ignition devices, especially mine ignition devices - Google Patents

Description

GERMAN

The invention relates to a contact device for dynamoelectric ignition devices, in particular mine ignition devices, with one of Hand out against the action of a return spring to be actuated drive pin and one with this related switch-on mechanism.

The aim of the invention is to prevent with certainty that an unwanted current flow occurs when the drive pin is automatically returned, the igniter arranged in the ignition current loop at an unforeseen time with serious Consequences ignites. This was determined by the arrangement of an automatic Return of the drive bolt to the starting position bridging the ignition circuit, from reached an ignition current control device actuated, movable contact member. The contact organ can preferably consist of two sliding contacts which are movable relative to one another and which on the slide on a fixed insulating washer. In particular, the sliding contacts bearing parts be disc-like and arranged coaxially.

In the drawing, an exemplary embodiment of the subject matter of the invention is shown, namely therein an overall arrangement of the ignition device limited to the parts necessary for understanding shown in the circuit diagram including circuit diagram.

The ignition device comprises the drive handle 1, the drive pin 2 and the drive segment 4, which is connected to the housing via a return spring 3 and is seated on the drive pin and which in turn meshes with the drive pinion of the ignition dynamo 20. A control disk 6 made of insulating material is coupled to take along via a drive pin 5 provided on the drive pin 2, which has a segment-shaped recess for the drive pin 5 at the top and a similar recess for a further drive pin 12 a at the bottom, the latter by a spring 15 in a clockwise direction one edge of the lower recess is pulled and is in permanent connection with the switch-on contact cam 12, which is designed as a disk.

Also the switch-on contact cam, which can be rotated about a bearing pin 11 12 has a segment-shaped recess into which the driver 16 a the short-circuit contact cam 16 protrudes. The bearing pin 11 is connected to an insulating washer 7 via a slip ring 10 in permanent connection. On the insulating disk 7 are a closing contact track 8 and a short-circuit contact track 9 is provided, with each of which a sliding contact 13 and 17 cooperates.

A locking thumb 14 made of insulating material is also pivotably mounted on the bearing pin 11,

Contact device

for dynamoelectric ignition devices, in particular mine ignition devices

Applicant:
Schaffler & Co., Vienna

Representative: Dipl.-Ing. F. Wmnicki, patent attorney,
Darmstadt, Adelungstr. 10

which at its free end has a recess for the standing under the influence of a spring 18 α has magnetic locking bolt 18, which is axially displaceable in the housing.

The mode of operation of the contact device according to the invention is as follows:

If the trigger 21 of the drive handle 1 is rotated clockwise for the purpose of firing, so With this, the output pin 2 and the driver 5 rotate freely for the time being. After about Vs rotation Then the driving pin 5 comes to rest on one edge of the upper recess of the control disk 6 and inevitably takes the latter with him. Via the elastic coupling 15, the Mitwahmestif112 α of the switch-on contact cam 12 and thus this itself as well as the locking thumb 14 attached to it taken him clockwise. As a result, the latter arrives in front of the magnetic locking bolt 18.

If the drive handle has now been rotated sufficiently quickly 1 night, contact is established in that the locking bolt 18 lies in front of the locking thumb 14, prevented, so that to the terminals of the ignition cable no electricity can flow.

However, if the drive handle 1 has been turned sufficiently strong, the magnetic locking bolt will become 18 attracted by the magnet 19 and thus gives> the way for the bolt thumb 14 and thus for the switch-on contact cam 12 free. As a result, the switch-on sliding contact 13 reaches the switch-on contact track 8 and thus closes the ignition circuit. The rotary movement of the bin holding contact cam 12 is also via the driver 16a which comes to rest on one of the edges of the recess in the latter the short-circuit contact cam 16 and thus the on

709 846/173

This located Kurzsehlußschleifkontakt 17 taken away.

The switch-on and short-circuit system work together so that 4 msec after the power circuit By means of the switch-on sliding contact 13, the short-circuit sliding contact 17 on the short-circuit contact track 9 runs up and thus short-circuits the terminals of the ignition circuit.

:. When the drive mechanism of the ignition device is automatically returned to the starting position under the action of the return spring 3, the drive pin 2 initially moves freely in a counterclockwise direction. After about ¹ Zs rotation, the control disk 6 and thus the switch-on system consisting of the switch-on contact cam 12, the driver 12 a, the switch-on sliding contact 13, the locking thumb 14 and the clutch spring 15 is inevitably taken along by this movement. The switch-on sliding contact 13 leaves the switch-on contact path 8 in this way, so that a current circuit is no longer possible for the time being, especially since the short-circuit sliding contact 17 is still on the short-circuit contact path 9. Only after leaving the switch-on contact path 8 through the switch-on sliding contact 13 does the left stop side of the recess of the switch-on contact cam 12 come to rest on the driver 16 a of the short-circuit contact cam 16, whereby the short-circuit sliding contact 17 is inevitably moved away from the short-circuit contact path 9. At this point in time, however, the drive mechanism of the ignition device has already reached its starting position.

Claims (3)

Claims 1. Contact device for dynamo-electric ignition devices, in particular mine ignition devices, with a drive pin to be actuated by hand against the action of a return spring and a locking mechanism associated therewith by a during the automatic return of the drive pin to the starting position Ignition circuit bridging, actuated by an ignition current control device, movable Contact body. 2. Contact device according to claim 1, characterized in that the contact member consists of two sliding contacts (13, 17) that can move relative to one another and are always in conductive connection consists, which slide on contact tracks (8, 9), d, ie attached to a fixed insulating washer (7) are. 3. Contact device according to claim 1 or 2, characterized in that the two sliding contacts (13,17) bearing parts are designed as two coaxially arranged wedges (12,16), which can be coupled to one another to take them along. Considered publications:
German patent specification No. 876 565. 1 sheet of drawings © 709 8 * 6/173 12.57