{"product_id":"the-secret-signal-n-tesla-1903","title":"The Secret Signal — N. Tesla, 1903","description":"\u003cp\u003e\u003cstrong\u003eXVI — The Tower · Drop 1\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA wireless message sent on one frequency can be heard by anyone tuned to it. Tesla's fix was to use several at once: the receiver responds only when every one of its tuned circuits is triggered together, so a stray signal does nothing. It's an early idea for keeping wireless messages private, from the first years of radio.\u003c\/p\u003e\u003cp\u003eRestored from the original U.S. patent and printed in amber on black.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eU.S. Patent No. 725,605 · Granted 1903\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003e→ \u003ca href=\"\/blogs\/archive\/tesla-secret-signal-system-of-signaling-patent-725605\"\u003eRead the full story in The Archive\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe shirt\u003c\/strong\u003e\u003cbr\u003e• Bella + Canvas 3001, unisex fit\u003cbr\u003e• 100% combed and ring-spun cotton\u003cbr\u003e• Fabric weight: 4.2 oz.\/yd.² (142 g\/m²)\u003cbr\u003e• Pre-shrunk, side-seamed, shoulder-to-shoulder taping\u003cbr\u003e• Printed to order, just for you\u003c\/p\u003e\u003cp\u003eNote: the fabric is lightweight and slightly sheer under some lighting.\u003c\/p\u003e","brand":"SEEKER VII","offers":[{"title":"S","offer_id":67790773256491,"sku":"5779914_4016","price":36.0,"currency_code":"USD","in_stock":true},{"title":"M","offer_id":67790773289259,"sku":"5779914_4017","price":36.0,"currency_code":"USD","in_stock":true},{"title":"L","offer_id":67790773322027,"sku":"5779914_4018","price":36.0,"currency_code":"USD","in_stock":true},{"title":"XL","offer_id":67790773354795,"sku":"5779914_4019","price":36.0,"currency_code":"USD","in_stock":true},{"title":"2XL","offer_id":67790773387563,"sku":"5779914_4020","price":38.0,"currency_code":"USD","in_stock":true},{"title":"3XL","offer_id":67790773420331,"sku":"5779914_5295","price":40.0,"currency_code":"USD","in_stock":true},{"title":"4XL","offer_id":67790773453099,"sku":"5779914_5310","price":42.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1026\/8783\/4411\/files\/unisex-staple-t-shirt-black-front-6ad3709fe7f5f.jpg?v=1792241838","url":"https:\/\/seekervii.com\/products\/the-secret-signal-n-tesla-1903","provider":"SEEKER VII","version":"1.0","type":"link"}