Image: Introduction to Patent and Harcourt’s Specification, Castors for Furniture. Patent AD1839 No 8240. An example the front page of this patent for brass castors for furniture.
[Image from: Birmingham Central Library, Local Studies and History]
|An alloy of copper and zinc, usually in the ratio of 60-80% copper and 40-20% zinc.
|Zinc carbonate (ZnCO3), an ore of zinc found in carboniferous limestone regions, such as Derbyshire and Cornwall.
|Produced by smelting calcined calamine with broken or granulated copper, it has a maximum of 28% zinc content.
|The heating together of zinc ore and copper to produce brass.
|The term used for the copper lead alloy which is used mainly for the casting of domestic pots.
|An alloy made up of 80% copper, 9% yellow brass, 10% tin and 1% lead, although the mixture can vary.
|An old name for brass encompassing that used for medieval church brasses
|Originating in China, this alloy of zinc, copper and nickel was used as a cheap alternative to silver (which it resembled) in eighteenth century England.
|An official document giving inventors the right to an income for a term of years from those who may wish to use their invention.
|An alloy of copper and lead
|An old name for zinc
|Old name for foundry brass, often containing up to 3% lead to aid casting and machining.