Nevada United States 1936 stock video footage and royalty free HD video clips and photos.(page 3897).

Mechanical dialing system and growth of telephone system, woman dials on candlestick phone.

A film describing a mechanical dialing system of telephones. Men working with switchboards and other equipment. A woman with a short curly flapper hair cut dials a phone number on a candlestick style phone and speaks into the phone.

Location: United States USA

Date: 1926

Duration: 1 min 22 sec

Sound: No

Color: Monochrome

Clip Type: Edited

Language: English

Clip: 65675039599

Operators answer calls in a telephone exchange. Scene of 1926 telephone switchboards compared to 1879 earlier switchboards.

A film describing telephone exchange operations and the work of early telephone switchboard operators. A book showing picture of 1879 telephone exchange. Young men reenact the operation of an 1879 era telephone exchange or switchboard. They work feverishly to keep up with calls and make connections while a supervisor stands behind and observes. The 1879 system is then contrasted with the newer 1926 system. Large number of women seen seated at a line of telephone switchboards, handling calls in an orderly fashion. They wear early headphone apparatus. Supervisors walk behind the women inspecting operations. Close up view of women operating the telephone switchboards. Animated representation of connection between telephones and different places.

Location: United States USA

Date: 1926

Duration: 3 min 45 sec

Sound: No

Color: Monochrome

Clip Type: Edited

Language: English

Clip: 65675039600

Description of how a telephone works.

Animated film shows how sound waves are created by the human voice cause movement of air molecules and how this movement is transmitted through the flexible diaphragm of the telephone mouthpiece. The electrons passing through carbon granules in the mouthpiece are transformed into electric current and the magnet and flexible diaphragm in the telephone receiver transforms the current into sound waves. An old man and a kid talking into phone.

Location: United States USA

Date: 1928

Duration: 10 min 39 sec

Sound: No

Color: Monochrome

Clip Type: Edited

Language: English

Clip: 65675039601

Airborne Nuclear Reactor. Rods inserted in reactor and adjustments made by remote controlled metal hands.

Airborne Nuclear Reactor in storage pit. Men work on reactor. Rods are inserted in the central core of a nuclear reactor and adjustments being made by remote controlled metal hands. Reactor tilts on one side.

Location: United States USA

Date: 1955

Duration: 4 min 21 sec

Sound: No

Color: Color

Clip Type: Unedited

Language: None

Clip: 65675039670