| 摘要 |
A safety device comprises a pad with a housing (10), with a perforated end wall (11), through which spikes (13) are extensible by means of load applied via a connection (19), to a moveable plate (15) to which the spikes (13) are mounted, against the bias of a spring (18). The spikes are also individually spring loaded to allow for unevenness in a surface to which the pad is applied. This can be used for example at the top and bottom of ladders to prevent slipping. A sole for footwear is also disclosed with inner and outer soles with a foam layer between and spikes or studs on the inner sole which can be extended through the lower sole when the foam layer is compressed.
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