Clad

When the United States Mint removed the silver from circulating US coinage in 1965, they faced a technical challenge. Many vending machines depended upon both the size and the electrical conductivity of the coins to determine if they were counterfeit or similarly sized foreign coins. After much testing, the Mint came up with an innovative solution. By making a sandwich of two layers of a nickel alloy (75% Copper, 25% Nickel) with a pure copper core, they were able to duplicate the electrical conductivity of the 90% silver, 10% copper coins. The new clad dime and quarter were available in 1965; the half dollar went through a brief period of reduced (40%) silver clad composition and became full cupro-nickel clad in 1971. When the dollar coin came back into production in 1971, it was also produced as a clad coin. The removal of silver from the circulating coinage of the United States led to one of the greatest silver booms of all time in the late 1970s. See also fiat money. Numismatics

See other meanings of words starting from letter:

C

CA | CB | CD | CE | CF | CG | CH | CI | CJ | CK | CL | CM | CN | CO | CP | CR | CS | CT | CU | CW | CX | CY | CZ |

Words begining with Clad:

Clad
Claddagh
Claddagh
Claddagh_Records
Claddagh_Ring
Claddagh_Ring
Claddagh_ring
Claddagh_ring
Cladding
Cladding_mode
Clade
Cladeos
Clader
Cladera_(town)
Clades
Cladeus
Clade_Cahen
Cladh_Hallan
Cladism
Cladist
Cladist
Cladist
Cladistic
Cladistics
Cladistics
Cladistics.ogg
Cladistic_parsimony
Cladocera
Cladoceran
Cladogenesis
Cladogram
Cladograms
Cladonia
Cladoniaceae
Cladonia_rangiferina
Cladonia_rangifernia
Cladophora
Cladorhiza
Cladorhynchus
Cladorhynchus_leucocephalus
Cladoselache
Clad_coinage