History
In the late 1800s patents were issued for consumer products like flashlights; patent no. 617592 dated March 1898 is for an early metal flashlight that accepted D batteries.
Some early 1900s battery holders were often no more than a cardboard box with copper contacts. By the 1920s, battery holders used twin metal clips (like fuse holders) to hold the battery in place while making electrical contact. Patent no. 1439429 was granted in Dec., 1922 for an assembly with two spring arm clips, a small switch and a lamp assembly on the end of connected wires.
The introduction of polypropylene in the 1950s and miniature batteries by Eveready allowed for the use of small plastic battery holders. These are still common in toys, decorations, and lighted or blinking items. In 1957, electric wrist watches gained popularity with the public.
Battery holders developed in parallel with batteries over time; as battery package sizes shrunk so did the holders. In the 1980s, the first circuit board mounting lithium coin cell battery holders appeared in the form of patent no. 4487820 by the battery holder manufacturer MPD.
The electronics industry now uses many surface mounted lithium battery holders or sockets. CR2/3A, CR1/2AA and CR123A batteries began in camera applications, but expanded into new markets like alarm systems, hand held computers, and keyfobs.
Read more about this topic: Battery Holder
Famous quotes containing the word history:
“For a transitory enchanted moment man must have held his breath in the presence of this continent, compelled into an aesthetic contemplation he neither understood nor desired, face to face for the last time in history with something commensurate to his capacity for wonder.”
—F. Scott Fitzgerald (1896–1940)
“... in America ... children are instructed in the virtues of the system they live under, as though history had achieved a happy ending in American civics.”
—Mary McCarthy (1912–1989)
“Philosophy of science without history of science is empty; history of science without philosophy of science is blind.”
—Imre Lakatos (1922–1974)