Semaphore Patents (Class 246/479)
  • Patent number: 6272943
    Abstract: A drive mechanism for a barrier or a stop or gate device includes a drive unit having a drive motor (17) to which at least one single-stage step-down gear, worm gear and/or spur gear with an articulation to a pivoting crank (38) is connected, with the crank being mounted on a primary shaft (46) pivoting preferably around a horizontal axis at bearing points on both sides. The shaft is provided with a fixing device (40) for the barrier beam (41) or gate element which can generally pivot at an angle of approximately 90° in addition to abutments for the compensation springs (48) which act upon their spring crank. The drive mechanism further includes a single-part, single-piece drive casing (G) with open, flat securing flange strips (2) on all sides and a receiving flange (14) to secure the drive motor (17) which can be dismantled and removed. The motor shaft (36) of the drive motor is introduced into a gear case (9) which can be closed by a cover (10) and which contains a set-down gear.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: August 14, 2001
    Assignee: Magnetic Autocontrol GmbH
    Inventors: Lothar Lais, Walter Schwald
  • Patent number: 5813796
    Abstract: A barrier for a roadway has an upright (1), a barrier arm (9) fitted on a horizontal drive spindle (2), a pivoting mechanism and a balancing spring (8) supporting the opening and closing movements of the barrier arm (9). The balancing spring (8) has an untensioned zero position (0) between the blocking position (S) and the open position (F) of the barrier arm (9).
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: September 29, 1998
    Assignee: Skidata Computer Gesellschaft mbH
    Inventor: Wolfram Kocznar