Abstract: A fast acting sensing circuit for use in a warning system to indicate relative movement between an object and a sensor when the movement exceeds a predetermined rate of speed. The circuit only provides an output if the rate of speed exceeds the predetermined level.

Abstract: A bathaid device for retaining the legs of a bed confined person in spreaded relation to permit access into the perineum of the person. The device includes an upper foot engaging portion disposed to receive the feet of the person thereon and leg means are provided for unsecured engagement with the foot board of the bed to retain the foot engaging portion in desired position. The device is made lightweight and portable.

Abstract: A ventilator assembly for attachment in an opening in a partition such as a ceiling of a structure such as a dwelling. The ventilator assembly includes a housing having an elongated body portion of sufficient length to extend through insulation which may be disposed adjacent the partition. A first removable cap member having a central opening therethough is disposed on a first end of the housing and a second removable cap member is secured to a second end of the housing. The second cap member is provided with air inlet means having a grill secured thereover. In one embodiment of the invention, a filter is provided in the grill of the air inlet means and in the removable first cap member. Additionally, activated carbon filters are provided in the interior of the housing. In a second embodiment, the removable first cap member supports an electric motor and exhaust fan therein and a movable baffle is mounted in the housing adjacent the air inlet means of the second cap member.