{"product_id":"vintage-siemens-brothers-slide-wire-potentiometer-in-wood-and-brass","title":"Vintage Siemens Brothers Slide Wire Potentiometer In Wood And Brass","description":"\u003ch1\u003e Vintage Siemens Brothers Slide Wire Potentiometer In Wood And Brass\u003c\/h1\u003e\n\u003cp\u003eThis simple piece of Physics laboratory equipment is a Vintage Siemens Brothers Slide Wire Potentiometer In Wood And Brass.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eMade by Siemens Brothers \u0026amp; Co, Electrical and Telegraph Engineers of Woolwich, London, SE18.  It dates to about the 1930s, or possibly earlier, and is in pretty good condition with a few scratches\/blemishes in the wood and pitting in the brass .\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt measures resistance in a conductor between 0 to 0.01 ohms in 0.001 ohm increments. I'm not sure whether it should actually be called a Wheatstone bridge, Kelvin Bridge, Ohmmeter or Potentiometer!  It has not been tested, and is sold as a collectible for display only.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBeautifully made from hard wood and brass, it has \u003c\/span\u003e4 connector terminals and is labelled:-\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eSiemens Bros \u0026amp; Co. London\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eOhm Compensated\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eApproximate Size WHD\u003c\/strong\u003e : 36.6 x 5 x 6.8 cm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA nice collectible piece of vintage technology for display.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/vintage-technology-scientific-engineering-imaging-medical-equipment-instruments-tools\" target=\"_blank\"\u003evintage technology.\u003c\/a\u003e\u003c\/p\u003e","brand":"Siemens Brothers \u0026 Co","offers":[{"title":"Default Title","offer_id":43547325858049,"sku":"","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/Vintage_Siemens_Brothers_Slide_Wire_Potentiometer_In_Wood_And_Brass_2.jpg?v=1729255753","url":"https:\/\/mullardantiques.co.uk\/en-us\/products\/vintage-siemens-brothers-slide-wire-potentiometer-in-wood-and-brass","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}