cut out for the brake electromagnet supply cable this cut out accommodates a cable seal which besides sealing the cable also prevents the electromagnet winding 8 from rotating prevention of rotation of the electromagnet winding 8 is necessary to ensure correct operation of the adjustment mechanism and to protect the cable against damage by attrition these various holes and cut outs in the electromagnet housing 7 described above also allow auxiliary equipment and attachments to be fastened thereto without extra machining the brake housing 49 is also provided with lugs not illustrated which furthermore as shown in fig9 b the brake housing 49 comprises sleeves 57 placed inside the brake springs 18 and provided with an internal thread by inserting threaded bolts 58 through corresponding holes in the brake housing and screwing them into the sleeves 57 the brake springs 18 can be prevented from being released when the brake is dismantled for example in connection with maintenance operations instead of using an o ring 53 a variety of other shapes may be employed for example the o ring may be replaced by a plurality of bands composed of a material with elastic properties similar to that of the o rings similarly short bars pins or balls accommodated in appropriately shaped cut outs disposed on the face of the electromagnet housing 7 may also be used without adversely affecting the operation of the brake or adjustment system in addition in the above description the o ring 53 or other elastic members as described above has been described as being accommodated on the face of the electromagnet housing 7 however it may also be operatively accommodated on the face of the anchor 48 thus it will be apparent to a person skilled in the art.