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Western Electric 202 hand telephone set as refurbished in the late 1930s and 1940s with new handset style. The low-profile 684A subset (1931) is mounted on wall in background. When designating anti-sidetone apparatus, the Bell System practice was to add the value 100 to the apparatus code of the corresponding sidetone equipment. [34]
The housing of the bell box may be manufactured from wood, metal, or plastic. The basic core component of a conventional bell box is an electromagnet and a bell or other metal piece, some of which create a repetitive sound. [1] The bell sound is normally created inside the box, although the unit may have bells mounted on the outside of the box.
A split-50 M-type 66 block with bridging clips attached. A 66 block is a type of punch-down block used to connect sets of wires in a telephone system. They have been manufactured in four common configurations, A, B, E and M. [a] A and B styles have the clip rows on 0.25" centers while E and M have the clip rows on 0.20" centers.
The modern electric bell mechanism had its origin in vibrating "contact breaker" or interrupter mechanisms devised to break the primary current in induction coils. [5] Vibrating "hammer" interrupters were invented by Johann Philipp Wagner (1839) and Christian Ernst Neeff (1847), and was developed into a buzzer by Froment (1847).
MCX A version of the CX product line designed by F.R. McBerty after leaving Western Electric/Bell Labs and becoming President of North Electric. The McBerty design used an early "wire spring relay" and welded piano wire interconnections rather than complex wire multiples. The system never achieved the reputation of the CX product due to ...
Western Electric hand telephone set of c. 1930 with its ringer box or subscriber set in the background.. A ringer box is a telephone signaling device, similar to a bell box.It usually contains an electromechanical gong and was used with most early desk stand telephones, such as candlestick telephones and the Western Electric type Western Electric hand telephone sets, which were too small to ...