Established in 1906, Frank Moore soon became well known amongst discerning tradespeople for the quality & accuracy of his tools. The Company was acquired by John Shaw & Son in 1945 & James Neill & Co in 1970. Currently part of the Bower Meteorology UK Group, they still produce superb tools & measuring instruments in Sheffield. The subject item is made from high-grade carbon silver tool steel with the patented 'Firm Lock' joint, that identifies the maker as Moore & Wright.A tool used for external measurement of items made by a maker who patented the "firm lock" jointing system now used on many different types of tools in many different industries. These items are now collectible and quite rare as a result are sought by tool collectors in the USA and UK.‘Firm Joint’ external measuring calipers believed made by Moore & Wright. Impressed into the metal "L A J S" (Probably the owner and company that used the item nothing to do with manufacturing) flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, calipers, callipers, external calipers, outer caliper, pottery tools, masonry tools, glass making tools, external measurement

An aneroid barometer is an instrument used for measuring air pressure as a method that does not involve liquid. Invented in 1844 by French scientist Lucien Vidi, the aneroid barometer uses a small, flexible metal box called an aneroid cell (capsule), which is made from an alloy of beryllium and copper. The evacuated capsule (or usually several capsules, stacked to add up their movements) is prevented from collapsing by a strong spring. Small changes in external air pressure cause the cell to expand or contract. This expansion and contraction drives mechanical levers such that the tiny movements of the capsule are amplified and displayed on the face of the aneroid barometer. Many models include a manually set needle which is used to mark the current measurement so a change can be seen. This type of barometer is common in homes and in recreational boats. It is also used in meteorology, mostly in barographs and as a pressure instrument in radiosondes.5 inch Aneroid barometer on wooden basebarometer, aneroid