Abstract: An automobile partition apparatus is described including a curved vertical sliding partition window which, to provide greater rear seat legroom, is mounted on vertically curved tracks attached to the front surface of a shield plate separate from and located behind the front seat backrest. The shield plate and partition are attached to a roll bar to form an integral unit which is removably mounted on the body of the automobile to enable the unit to be removed without damage for use on another automobile. The window slides vertically between a closed position above the shield and an open position below the top of the shield where such window is located between the shield and the front seat backrest. The legs of the roll bar are curved to provide more head and shoulder room for rear seat passengers. A simple and compact window raising mechanism is mounted on the front of the shield which employs a flexible line having one end attached to the partition window.

Abstract: Ventilation device with a vent pivotally mounted in a frame and restrained against opening forces by a locking mechanism and also connected to the frame by a hydraulic brake or damper designed to gradually reduce the opening speed of the vent at least towards the end of the opening movement.

Abstract: A roof vent for releasing smoke and heat from a building in the case of a fire is provided with a cover mounted on two track members for movement in the common direction of elongation of the track members which define therebetween an opening through the roof. The cover is permanently biased away from the position in which it closes the roof opening, but is normally retained in its closing position by a detent device which may be inactivated by temperature sensitive apparatus in the case of a fire. The operating elements of the vent are concealed from view and protected from the elements by being arranged under the cover member.