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可穿戴设备
Face Shield with a Replaceable Window: Flood, 1946
A face shield is a transparent window hung in front of the face from a headband. Shields get pitted and worn and must be replaced, and if the fastenings are fixed to the shield they are thrown away with it. Oscar S. Flood of Chicago patented a remedy in 1946, US 2,406,598: punch a row of holes along the shield's top edge and fasten it to the visor with snap fasteners, or with a spring-steel strip whose tongues pass through the visor. A worn shield is unsnapped and a new one put in, and all the hardware stays on the visor.
初学者
1 hour
说明
1
1
Headband and visor
Headband and visor
Pivot the visor to the sides of an adjustable headband so it can be swung up or down.
此步骤所需材料：
可调头箍1 个
铰接面罩架1 个所需工具：
螺丝刀套装2
2
Shield
Shield
Cut the transparent shield, punch a row of holes along its top edge spaced to match the fasteners on the visor, and bind the bottom and side edges with metal or fabric.
此步骤所需材料：
透明面罩片1 个
包边条1 as required所需工具：
美工刀
打孔器
钢丝钳3
3
Fasten
Fasten
Fix the female parts of the snap fasteners to the visor. Push each male part through a holding strip inside the visor and through a hole in the shield, and snap it home. (Alternatively, punch inward projections in the visor and lock the shield with a spring-steel strip whose tapered tongues pass through the visor.)
此步骤所需材料：
按扣套装（重型）1 个
弹簧钢带1 as required材料
6- 1 个占位符
- 1 个占位符
- 1 个占位符
- 1 as required占位符
- 1 个占位符
- 1 as required占位符
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