| 摘要 |
A window shelf with a first hollow long rectangular box member and a second hollow long rectangular box member having one open end. The open end of the second box member slides over the first box member. A ratchet rail is located within the first box member and engages a pawl mechanism located within the second box member. A rubber end cap located at the end of the first box member and a pair of threaded rubber end caps at the end of the second box member are all situated so that when the first box member is slid outward from the second box member the pawl engages the ratchet rail and prevents the first box member from sliding inward and the threaded extension caps are turned until the window shelf is frictionally engaged with the inside frame walls of a window.
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