"Send more men." Won't you answer the call / Stone Ltd.
Poster showing a soldier using telephone apparatus.
Canada Royalty Free Stock Photo
The invention of the telephone still remains a confusing morass of claims and counterclaims, which were not clarified by the huge mass of lawsuits to resolve the patent claims of commercial competitors. The Bell and Edison patents, however, dominated telephone technology and were upheld by court decisions in the United States. Bell has most often been credited as the inventor of the first practical telephone. Alexander Graham Bell was the first to patent the telephone as an "apparatus for transmitting vocal or other sounds telegraphically". The telephone exchange was an idea of the Hungarian engineer Tivadar Puskás (1844 - 1893) in 1876, while he was working for Thomas Edison on a telegraph exchange. Before the invention of the telephone switchboard, pairs of telephones were connected directly with each other, practically functioned as an intercom. Although telephones devices were in use before the invention of the telephone exchange, their success and economical operation would have been impossible with the schema and structure of the contemporary telegraph systems. A telephone exchange was operated manually by operators, or automatically by machine switching. It interconnects individual phone lines to make calls between them. The first commercial telephone exchange was opened at New Haven, Connecticut, with 21 subscribers on 28 January 1878, in a storefront of the Boardman Building in New Haven, Connecticut. George W. Coy designed and built the world's first switchboard for commercial use. The District Telephone Company of New Haven went into operation with only twenty-one subscribers, who paid $1.50 per month, a one-night price for a room in a city-center hotel. Coy was inspired by Alexander Graham Bell's lecture at the Skiff Opera House in New Haven on 27 April 1877. In Bell's lecture, during which a three-way telephone connection with Hartford and Middletown, Connecticut, was demonstrated, he first discussed the idea of a telephone exchange for the conduct of business and trade.
During the First World War, Canadian war posters were using bold and short text copy, often along with simple, descriptive images to convey their messages. Heavily word based, they featured sentimental reminders of the need to support "the boys" at the front, viciously drawn attacks on "the Hun" (Germans). WWI period imagery often requires decoding in order to be understood by today's reader. During the Second World War, more picturesque "Buy Victory Bonds!", or "Don't Spread war- rumours" to avoid becoming "one of Hitler's Little Helpers" messages were everywhere. Canada created posters aimed at convincing citizens to join the military or help out on the home front.