Telegraph Multiplex Driving Fork for Distributor Motor
notes: label: Description (Brief)
content: Telegraph Multiplex Driving Fork for Distributor Motor. Driving fork is mounted on a gray heavy non-ferrous base (magnesium?). Mounted on top of the base is a steel tuning fork (18.5" L x 1.625" W x .75" H) with two black metal blocks on the end of each bar, and two smaller blocks near the center of the fork. A transformer coil is set in the base under the fork. Each bar has a set of contacts which open and close the circuit as the bar vibrates. Seven black terminal lugs on the base, lugs labeled 3 and C are shunted. The larger blocks are stamped "7A-2", the smaller blocks "7A-4". Two electromagnet coils, three Potter type BW6A2 capacitors (2 mfd, 600 vdc), and three Ohmite 100 ohm resistors are mounted under the base. Four rubber feet.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from ITT World Communications, Inc., thru John Van Ingen
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.330265
label: catalog number
content: 330265
label: accession number
content: 288763
objectType: label: Object Name
content: Multiplex Driving Fork
label: Object Name
content: Telegraph Multiplex Driving Fork
label: Object Name
content: telegraph driving fork
label: Other Terms
content: Multiplex Driving Fork; Telegraph Multiplex Driving Fork; Telegraphy
physicalDescription: label: Measurements
content: overall: 5 1/2 in x 19 in x 5 3/4 in; 13.97 cm x 48.26 cm x 14.605 cm