1774 (Royal Soc.) 63 237 The iron bell-wire in both the parlours and the hall was reduced to smoke and entirely dissipated, excepting..the wire springs contiguous to the bell.
1833 J. C. Loudon §665 Wire Springs for stuffing are nothing more than spiral coils of wire.
2000 P. Vincent 78 Seatposts of the telescoping kind..contain..wire springs, which provide the suspension.