ApplicationNo. 05/663169 filed on 03/02/1976
US Classes:297/477, Electrically operated180/268, WITH BELT OR HARNESS FOR RESTRAINING OCCUPANT, AND MEANS WHEREBY THE BELT OR HARNESS CONTROLS, OR IS CONTROLLED BY, THE FUNCTIONING OF A VEHICLE SYSTEM OR COMPONENT242/383.1, With lock prevention or sensitivity reduction242/383.4, Frame mounted locking pawl280/806Inertia responsive locking or tightening of belt or harness
ExaminersPrimary: Gilreath, Stanley N.
Assistant: Jillions, John M.
Attorney, Agent or Firm
Foreign Application Priority Data1973-04-25 JA
AbstractAn automatic braking safety belt retractor reel includes a reel provided with a first ratchet reel rotatable with a shaft and spring biased in a belt retracting direction. A braking pawl is movable into engagement with the ratchet reel by a rockable second ratchet wheel which is advanced by a second pawl pivoted on an inertial wheel and urged into engagement with the ratchet wheel by a cam on the shaft when the inertial wheel lags the rotation of the cam as a result of the rapid shaft acceleration. An armature of magnetic material is mounted on a second pawl and an electromagnet having an annular core, when excited, attracts the armature to prevent the engagement of the second ratchet wheel by the second pawl and the braking of the reel. The electromagnet is excited upon occupation of the seat or closing of the vehicle door and is de-excited upon buckling of the belt.