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