Patent ID: 9062487
Filing Date: 2015-06-23
Classification: E05B,E05F,E05Y

Abstract:
1. A child safety device for a casement window comprising: a casement window operator cover engageable with a casement window operator driven by a handle; a gear reduction assembly mounted in the casement window operator cover; the gear reduction assembly including a sensor gear driven at a reduced speed relative to rotation of the handle; a sensor arm driven by the sensor gear of the gear reduction assembly; a slider movable between a stop position and a retracted position, a biasing spring connected to bias the slider towards the stop position; the slider including a stop end that prevents further opening of the casement window in a less than fully opened position of the casement window and the slider is in the stop position; and a catch for holding the slider in the retracted position against the biasing spring, the catch holding the slider in the retracted position until the sensor arm reaches a predetermined position and releases the catch to allow the slider to move to the stop position.