| 摘要 |
A safety lock with lockable double cylinders on both sides, used for house doors and also for fire doors, contains two conical gearwheels pressed into the blind bores from the inner side of the two cylinders; a conical toothed drive, mounted in the bore of the bit, meshing with the conical gear wheels perpendicularly to the cylinder axis and generating a planet-gear movement about the cylinder axis, this being necessary for the rotation of the bit and for the ejection subassembly consisting of the ejection shank, there being pressed in on its ends two discs touching the tips of the keys inserted into the cylinders.
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