{"product_id":"vintage-brass-steam-engine-valve-gear-demonstration-model","title":"Vintage Brass Steam Engine Valve Gear Demonstration Model","description":"\u003cp\u003eBrass steam engine valve gear demonstration model produced to illustrate the operation and timing of steam valve mechanisms in a compact, highly visible format. The model features a heavy spoked flywheel, exposed crankshaft and connecting rods, brass cylinder and valve chest, and adjustable linkage mounted to a finished wooden base. All major mechanical relationships are left uncovered, emphasizing motion, sequencing, and mechanical interaction rather than power output.\u003cbr\u003e\n\u003cbr\u003e\nModels of this type were used by valve manufacturers, engineers, and salesmen to demonstrate valve function, cutoff, and piston motion without the need for a full boiler or working engine installation. Metallic Valve Co., a manufacturer specializing in steam valves and related components, used demonstration apparatuses like this to educate customers and promote their designs during the peak years of American steam technology.\u003cbr\u003e\n\u003cbr\u003e\nShows age-appropriate wear throughout including surface patina, light oxidation, and handling marks to the brass components and wooden base. The mechanism turns freely by hand, with all primary components intact and well-presented.\u003cbr\u003e\n\u003cbr\u003e\n15\" L x 6\" W x 7\" H\u003cbr\u003e\n\u003cbr\u003e\nMM - 18649 - 010226\u003c\/p\u003e\n\n\u003cp\u003eFor information regarding shipping, please visit our Terms \u0026amp; Conditions page \u003ca class=\"GeneratedLink\" href=\"https:\/\/industrialartifacts.net\/pages\/shipping\" target=\"_blank\"\u003ehere\u003c\/a\u003e.\u003c\/p\u003e\n","brand":"Industrial Artifacts","offers":[{"title":"Default Title","offer_id":42700779520043,"sku":"18649","price":2750.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0194\/8170\/files\/a0e362cf-4de6-5062-9e7d-496019fef971.jpg?v=1768515751","url":"https:\/\/industrialartifacts.net\/products\/vintage-brass-steam-engine-valve-gear-demonstration-model","provider":"Industrial Artifacts","version":"1.0","type":"link"}