生成 19 世纪末美国专利文件风格的发明图，带编号技术图、手写批注和火漆印。
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一份关于{{invention}}的复古专利文件，风格仿照19世纪晚期美国专利商标局（United States Patent Office）的申报文档。页面包含精确的技术绘图，并配有带编号的标注说明（图1、图2、图3），分别展示正面视图、侧面视图和爆炸分解视图。使用钢笔墨水手写批注，描述各机构部件的工作原理。纸张呈泛黄象牙色，带有霉斑污渍（foxing stains）及柔和的折痕。页角处印有官方浮雕印章与红色火漆印。底部为发明人亲笔签名及签署日期。整幅图像令人感觉如同一份重见天日的档案文献——权威、厚重、富有历史感，且略带神秘气息。A vintage patent document for {{invention}}, styled after late 1800s United States Patent Office filings. The page features precise technical drawings with numbered callouts (Fig. 1, Fig. 2, Fig. 3) showing front, side, and exploded views. Handwritten annotations in fountain-pen ink describe mechanisms. The paper is aged ivory with foxing stains and soft fold creases. An official embossed seal and red wax stamp appear in the corner. A hand-signed inventor's name and date appear at the bottom. The entire image feels like a recovered archival document—authoritative, historic, and slightly mysterious.