{"id":508,"date":"2020-11-05T12:31:49","date_gmt":"2020-11-05T00:31:49","guid":{"rendered":"http:\/\/schaffer-and-budenberg.com\/?page_id=508"},"modified":"2025-04-19T22:04:45","modified_gmt":"2025-04-19T10:04:45","slug":"the-pressure-gauge","status":"publish","type":"page","link":"https:\/\/schaffer-and-budenberg.com\/de\/the-pressure-gauge\/","title":{"rendered":"Das Druckmessger\u00e4t"},"content":{"rendered":"<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis: 33.33%;\">\r\n<p class=\"has-small-font-size\">There was an unofficial race to produce a functioning, safe and accurate system of pressure measurement in the 1840s.\u00a0\u00a0The huge increase in the use of steam in all walks of life was emphasising the safety issues involved with exploding boilers, whether they were on trains or stationary engines in textile mills or steam ships.\u00a0\u00a0Mechanics and opticians across the developing world were in their workshops testing new ideas and trying out a variety of new systems to measure pressure accurately.\u00a0\u00a0Accuracy was the key, something that was not occurring with the old \u2018Mercury Bob\u2019 style of pressure measurement.<\/p>\r\n\r\n\r\n\r\n<p class=\"has-small-font-size\">You might wonder why opticians were part of this development, but many instrument makers started their lives in optical workshops.\u00a0\u00a0The need for accuracy and working to fine measurements was part of their apprenticeship in the optical trade, and a fair number went on to work with scientific instruments such as Bernhard Sch\u00e4ffer whose company produced microscopes and slides.\u00a0<\/p>\r\n<\/div>\r\n\r\n\r\n\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis: 66.66%;\">\r\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"580\" height=\"387\" class=\"wp-image-509\" src=\"https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/blown-loco-boiler-1024x683.png?resize=580%2C387\" alt=\"Photograph of a boiler explosion on a steam train circa 1860\" srcset=\"https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/blown-loco-boiler.png?resize=1024%2C683&amp;ssl=1 1024w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/blown-loco-boiler.png?resize=300%2C200&amp;ssl=1 300w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/blown-loco-boiler.png?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/blown-loco-boiler.png?resize=500%2C334&amp;ssl=1 500w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/blown-loco-boiler.png?resize=800%2C534&amp;ssl=1 800w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/blown-loco-boiler.png?resize=1280%2C854&amp;ssl=1 1280w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/blown-loco-boiler.png?resize=600%2C400&amp;ssl=1 600w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/blown-loco-boiler.png?w=1304&amp;ssl=1 1304w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/blown-loco-boiler.png?w=1160&amp;ssl=1 1160w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/>\r\n<figcaption>An extremely good reason to have an effective pressure gauge. The front of the locomotive has been blown off, and later strapped to the rear of the footplate to be towed back to the engine sheds. The size of the rivets and the height of the chimney stack shows it is an early train.<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\u00a0<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis: 66.66%;\">\r\n<p class=\"has-small-font-size\">Schinz was Swiss born, but spent much of his life working around Europe as a civil engineer, mainly building bridges.\u00a0\u00a0He was however, multi-talented.\u00a0\u00a0It appears he never actually patented his gauge design outside of Switzerland and Austria. They started being commercially produced in 1845 for use on railways in the German Federation and Prussia, the success of which was reported in the British weekly newspaper\u00a0<em>\u201eThe Engineer\u201c<\/em>berichtete \u00fcber die Erfolge dieser Ger\u00e4te.  Bourdons Messger\u00e4t, welches von allen vier Entw\u00fcrfen die kommerziell erfolgreichste wurde, basierte auf Schinz Arbeit. In Deutschen Bund und in Preu\u00dfen waren Bourdon-Messger\u00e4te wegen des speziellen Innenrohrs bis weit ins 20. Jahrhundert hinein als \"Schinz-Typ\" bekannt.<sup>th<\/sup>\u00a0century, because of the inner tube.\u00a0\u00a0Sydney Smith\u2019s gauges were taken up and promoted by George Stephenson and used heavily in mines, mills and railways. His gauge followed by improvements to the original design meant a busy factory producing for the railway companies. Smith always promoted himself as the\u00a0<em>der erste Patentinhaber eines Druckmessger\u00e4ts<\/em>\u00a0zu sein - Patent Nr. 11711 aus dem Jahr 1846 - was in Gro\u00dfbritannien auch stimmte.\u00a0\u00a0<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"580\" height=\"389\" class=\"wp-image-511\" src=\"https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Boiler-Explosion-in-Cheshire-1-1024x687.png?resize=580%2C389\" alt=\"Photograph of a steam train disaster due to a boiler explosion circa 1890\" srcset=\"https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Boiler-Explosion-in-Cheshire-1.png?resize=1024%2C687&amp;ssl=1 1024w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Boiler-Explosion-in-Cheshire-1.png?resize=300%2C200&amp;ssl=1 300w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Boiler-Explosion-in-Cheshire-1.png?resize=768%2C515&amp;ssl=1 768w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Boiler-Explosion-in-Cheshire-1.png?resize=500%2C335&amp;ssl=1 500w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Boiler-Explosion-in-Cheshire-1.png?resize=800%2C537&amp;ssl=1 800w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Boiler-Explosion-in-Cheshire-1.png?resize=1280%2C859&amp;ssl=1 1280w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Boiler-Explosion-in-Cheshire-1.png?resize=600%2C402&amp;ssl=1 600w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Boiler-Explosion-in-Cheshire-1.png?w=1300&amp;ssl=1 1300w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Boiler-Explosion-in-Cheshire-1.png?w=1160&amp;ssl=1 1160w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/>\r\n<figcaption>Diese schwere Explosion ereignete sich wahrscheinlich in Buxton, Derbyshire, 11 November 1921.<br \/><a class=\"\" href=\"https:\/\/www.railwaysarchive.co.uk\/docsummary.php?docID=2349\">https:\/\/www.railwaysarchive.co.uk\/docsummary.php?docID=2349<\/a> <br \/>Vielen Dank an Pete Skellon f\u00fcr diese Informationen und den Link.<br \/>Da im Hintergrund Lastwagen der Firma Verdin Cooke &amp; Co. mit Sitz in Winsford, Cheshire zu sehen sind. Es handelt sich um Lastwagen, die Salz aus den vielen Salzminen der Gegend transportierten.<\/figcaption>\r\n<\/figure>\r\n<\/div>\r\n\r\n\r\n\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis: 33.33%;\">\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p class=\"has-small-font-size\">Diese Grundlagen in der Optik und die neuen M\u00f6glichkeiten, um feinste Ger\u00e4te zu produzieren - was wenige Jahrzehnte zuvor nicht m\u00f6glich gewesen war - ebnete den Weg f\u00fcr Pr\u00e4zision in der Messtechnik. Vier M\u00e4nner produzierten innerhalb von vier Jahren (1845-1849) gute Messger\u00e4te, die patentiert und in der Industrie nutzbar waren. Viele andere Erfinder waren ihnen auf den Fersen, aber nur diese vier waren erfolgreich. Es handelt sich um:<\/p>\r\n\r\n\r\n\r\n<p class=\"has-small-font-size\">Eduard\u00a0<strong>Schinz<\/strong>\u00a0(1812-1855) aus Z\u00fcrich, Schweiz,<\/p>\r\n\r\n\r\n\r\n<p class=\"has-small-font-size\">Sydney\u00a0<strong>Smith<\/strong>\u00a0(1803-1882) aus Nottingham, in England,<\/p>\r\n\r\n\r\n\r\n<p class=\"has-small-font-size\">Eug\u00e8ne\u00a0<strong>Bourdon<\/strong>\u00a0(1808-1884) aus Paris, Frankreich und schlie\u00dflich<\/p>\r\n\r\n\r\n\r\n<p class=\"has-small-font-size\">Bernhard\u00a0<strong>Sch\u00e4ffer<\/strong>\u00a0(1823-1877) aus Magdeburg, Preu\u00dfen.\u00a0\u00a0<\/p>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n<p>Bernhard Sch\u00e4ffers Konstruktion war ganz anders als die Kapselrohrkonstruktionen von Schinz und Bourdon und hatte mehr \u00c4hnlichkeiten mit der von Smith. Beide Messsysteme nutzten die Auslenkung durch ein Diaphragma. Sch\u00e4ffers Ger\u00e4t besa\u00df eine Tellerfeder, die sich auf und ab bewegte und den Vibrationen auf Lokomotiven sehr gut widerstand - im Gegensatz zu den fr\u00fchen Quecksilbermanometern.  Sp\u00e4ter ergaben sich f\u00fcr diese Art von Messger\u00e4ten eine Vielzahl neuer Anwendungen, insbesondere als die chemische Verarbeitung und die Konservierung von Lebensmitteln allt\u00e4glich wurden. Die Tellerfedern konnten mit verschiedenen Materialien beschichtet werden, die von den zu messenden Chemikalien nicht angegriffen wurden oder die Lebensmittel, die konserviert wurden, nicht verunreinigten.  \nDer Patentantrag f\u00fcr Sch\u00e4ffers Messger\u00e4t wurde 1849 eingereicht und am 18. Januar 1850 wurde die Konstruktion offiziell patentiert.\u00a0<\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis: 66.66%;\">\r\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"580\" height=\"411\" class=\"wp-image-513\" src=\"https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1-1024x726.jpg?resize=580%2C411\" alt=\"Catalogue picture of Schaffer gauge\" srcset=\"https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?resize=1024%2C726&amp;ssl=1 1024w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?resize=300%2C213&amp;ssl=1 300w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?resize=768%2C544&amp;ssl=1 768w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?resize=500%2C354&amp;ssl=1 500w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?resize=800%2C567&amp;ssl=1 800w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?resize=1280%2C907&amp;ssl=1 1280w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?resize=1920%2C1360&amp;ssl=1 1920w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?resize=1536%2C1088&amp;ssl=1 1536w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?resize=600%2C425&amp;ssl=1 600w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?w=2000&amp;ssl=1 2000w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?w=1160&amp;ssl=1 1160w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Schaffer-gauge-drawing-1951-1.jpg?w=1740&amp;ssl=1 1740w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/><\/figure>\r\n<\/div>\r\n\r\n\r\n\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis: 33.33%;\">\r\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"580\" height=\"726\" class=\"wp-image-515\" src=\"https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Smiths-diaphragm-type-pressure-gauge_smll-818x1024.jpg?resize=580%2C726\" alt=\"Diagram of Sydney Smith pressure gauge\" srcset=\"https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Smiths-diaphragm-type-pressure-gauge_smll.jpg?resize=818%2C1024&amp;ssl=1 818w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Smiths-diaphragm-type-pressure-gauge_smll.jpg?resize=240%2C300&amp;ssl=1 240w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Smiths-diaphragm-type-pressure-gauge_smll.jpg?resize=768%2C961&amp;ssl=1 768w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Smiths-diaphragm-type-pressure-gauge_smll.jpg?resize=500%2C626&amp;ssl=1 500w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Smiths-diaphragm-type-pressure-gauge_smll.jpg?resize=800%2C1001&amp;ssl=1 800w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Smiths-diaphragm-type-pressure-gauge_smll.jpg?resize=600%2C751&amp;ssl=1 600w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Smiths-diaphragm-type-pressure-gauge_smll.jpg?w=959&amp;ssl=1 959w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/>\r\n<figcaption>Sydney Smiths Membranmessger\u00e4t, patentiert 1853, eine Verbesserung des ersten Patents von 1847.<\/figcaption>\r\n<\/figure>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n<p class=\"has-small-font-size\">During the period of Bourdon\u2019s development of his gauge \u2013 which lasted some years &#8211; the man who eventually produced it commercially for him was also working on pressure gauge designs.\u00a0\u00a0This was Felix Richard in Lyon.\u00a0\u00a0I think it is fair to say that the English speaking world has little knowledge of French inventors and scientists, but they were often ahead of the British, and were more often stymied by French bureaucracy than anything else \u2013 which continued to be the case when the French were building their railways, and led to their downfall in the Franco-Prussian war.\u00a0\u00a0(The Prussians took their troops to the front line by train!)\u00a0\u00a0Lucien\u00a0<strong>Vidie<\/strong>\u00a0(1805-1866) who had developed an aneroid barometer with a dial scale took Bourdon to court in a protracted legal battle (six years) which he won, because his barometer worked on a very similar style to Bourdon\u2019s pressure gauge.\u00a0\u00a0Bourdon\u2019s tube was a variant of Vidie\u2019s capsule internally, although it would appear that Schinz also used some of Vidie\u2019s ideas.\u00a0\u00a0As Schinz never patented it across wider Europe there was no court case to answer.<\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\r\n<p class=\"has-small-font-size\">Eines der fr\u00fchesten Patente f\u00fcr ein Dampfmessger\u00e4t wurde 1835 in den USA von Enos Allen angemeldet.  Allerdings handelte es sich dabei eher um einen Schmelzstopfen als um irgendeine Art von Messger\u00e4t, und obwohl Allen es schaffte, die US-Regierung dazu zu bringen, es insbesondere f\u00fcr alle Dampfschiffe verbindlich zu machen - er dachte bei der Entwicklung dieses Artikels an die Mississippi-Raddampfer -, wurde es bald \u00fcberholt.<\/p>\r\n\r\n\r\n\r\n<p class=\"has-small-font-size\">Bourdon nahm seine Erfindung 1851 mit nach London zur Weltausstellung im Kristallpalast, wo sie von allen Besuchern wegen ihrer Einfachheit in Design und Anwendung bewundert wurde.\u00a0\u00a0<\/p>\r\n\r\n\r\n\r\n<p>Edward Ashcroft, a young Irish-American visiting the Great Exhibition bought the rights to produce the Bourdon gauge in the States and it was in production over there by 1852. He made &#8216;improvements&#8217; and re-patented the gauge but his improvements were not as good as they could have been. The advantage of making an &#8216;improvement&#8217; to a patent meant that all the money would go to Ashcroft rather than a royalty to Bourdon. Ashcroft went on to become an extremely successful businessman and whose <a href=\"http:\/\/www.ashcroft.com\" target=\"_blank\" rel=\"noreferrer noopener\">company<\/a> still continues to this day, although part of a much larger conglomerate, but still operating under its own name.\u00a0<\/p>\r\n\r\n\r\n\r\n<p class=\"has-small-font-size\">Bernhard Sch\u00e4ffer and Christian Budenberg did not have the funds to go to the Great Exhibition in London in 1851.\u00a0\u00a0They had started their business a year previously and like many new start-ups were suffering from lack of funds for anything except the essentials.\u00a0\u00a0<\/p>\r\n<\/div>\r\n\r\n\r\n\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\r\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"580\" height=\"675\" class=\"wp-image-521\" src=\"https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Ashcroft-gauge-1853_sml-880x1024.jpg?resize=580%2C675\" alt=\"Line drawing of E H Ashton (USA) pressure gauge\" srcset=\"https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Ashcroft-gauge-1853_sml.jpg?resize=880%2C1024&amp;ssl=1 880w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Ashcroft-gauge-1853_sml.jpg?resize=258%2C300&amp;ssl=1 258w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Ashcroft-gauge-1853_sml.jpg?resize=768%2C894&amp;ssl=1 768w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Ashcroft-gauge-1853_sml.jpg?resize=500%2C582&amp;ssl=1 500w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Ashcroft-gauge-1853_sml.jpg?resize=800%2C931&amp;ssl=1 800w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Ashcroft-gauge-1853_sml.jpg?resize=600%2C698&amp;ssl=1 600w, https:\/\/i0.wp.com\/schaffer-and-budenberg.com\/wp-content\/uploads\/2020\/11\/Ashcroft-gauge-1853_sml.jpg?w=1031&amp;ssl=1 1031w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/>\r\n<figcaption>Edward Ashcrofts \"Verbesserung\" der Bourdonschen Lehre, patentiert in den USA, 1853.<\/figcaption>\r\n<\/figure>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n<p class=\"has-small-font-size\">Having enough money to buy the raw materials to make the gauges was causing problems, and they relied on loans from family members to keep going. In the early days they relied on income from contracts to make optical and scientific equipment for Engells &amp; Co. in Switzerland and Georg Oberhauser in Paris. However, in later exhibitions the Sch\u00e4ffer gauge won many medals. Both the Bourdon and Sch\u00e4ffer gauges are still produced in vast quantities today which shows that simplicity of design and function stand the test of time.\u00a0<\/p>","protected":false},"excerpt":{"rendered":"<p>There was an unofficial race to produce a functioning, safe and accurate system of pressure measurement in the 1840s.\u00a0\u00a0The huge increase in the use of steam in all walks of life was emphasising the safety issues involved with exploding boilers, whether they were on trains or stationary engines in textile mills or steam ships.\u00a0\u00a0Mechanics and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"templates\/template-full-width.php","meta":{"nf_dc_page":"","om_disable_all_campaigns":false,"_vp_format_video_url":"","_vp_image_focal_point":[],"footnotes":""},"class_list":["post-508","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The Pressure Gauge - Sch\u00e4ffer &amp; Budenberg: Precision Engineers<\/title>\n<meta name=\"description\" content=\"Bernhard Sch\u00e4ffer\u2019s design was quite different to the capsule tube designs of Schinz and Bourdon and had more similarities to Smith\u2019s, both having measuring systems using deflection from a diaphragm. 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