Patent ID: 7818920

Claim:
A barrier gate comprising: a support frame; a first shaft rotatably supported by the support frame; a barrier arm, connected to the first shaft by a connection means; a first crank arm affixed to the first shaft; a rod pivotally connected to the first crank arm; a crank plate rotatably connected to the rod and rigidly affixed to a first sprocket; a chain means, engaged with the first sprocket and a second sprocket, for maintaining the first sprocket and the second sprocket at 1:1 correspondence; a rotary encoder, operationally connected to the second sprocket, for sensing a continuous angular displacement of the barrier arm; a horizontal axis torque limiter assembly rotatably connected to the rod; a transmission pivotally connected to the horizontal axis torque limiter assembly; and a motor operationally connected to the transmission wherein the horizontal axis torque limiter assembly further comprises, a hub assembly, including a circular disk having an offset hole and a raised perimeter wall; a spindle assembly, including a concentrically aligned base flange and a threaded stanchion; a first brake lining adjacent the base flange and concentrically aligned with the spindle assembly; a circular brake disk including a concentrically aligned brake disk hole rigidly affixed to the raised perimeter wall adjacent a second brake lining; a caliper disk assembly, adjacent the second brake lining, including a gland nut axially adjustable with respect to the threaded stanchion, the gland nut having a support flange adjacent an axially adjustable rotor plate; a plurality of spring seats spaced radially equidistant around the axially adjustable rotor plate; a plurality of spring washers, adjacent the rotor plate, in the plurality of spring seats; a plurality of threaded holes, in the support flange, formed in a radially equidistant pattern; a plurality of bolts, positioned in the plurality of threaded holes in the support flange, contacting the plurality of spring washers; and, wherein the plurality of bolts cooperates with the gland nut, the plurality of spring washers, and the plurality of spring seats to provide equally distributed and adjustable pressure on the rotor plate.