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Alarm
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1944 2,500 women trample guards and floorwalkers to purchase 1,500 alarm clocks announced for sale in a Chicago, Illinois department store
1882 Wood block alarm invented, when alarm rang, it dropped 20 wood blocks 1877 Edwin T. Holmes installs 1st telephone switchboard burglar alarm 1865 Fire alarm and police telegraph system put into operation in San Francisco 1858 Edwin T. Holmes installs 1st electric burglar alarm (Boston, Massachusetts) 1857 William Francis Channing and Moses G Farmer patents electric fire alarm |
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