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#002 The Worlds Columbian Exposition Scrapbook, p. 128
40 EXPOSITION STUDY CLASS REVIEW.
England, to carry clay from a pit to the Glynde railway siding, whence
it was delivered into trucks and taken by rail to its ultimate destina-
tion.
ELECTRICAL TRANSMISSION OF POWER.
One of the most important applications of electricity to industrial
purposes which the modern development of the electric light has led to
is the electrical transmission of power. Siemans, a few years ago,
pointed out that no further loss of power was involved in the transform-
ation of electrical into mechanical energy than is due to friction and to
the heating of the conducting wires by the resistance they oppose. This
loss, careful researches have demonstrated, need not be more than 13 per
cent., providing there is no loss on the connecting leads.
The Paris Electrical Exposition in 1881 afforded interesting illustra-
tions of the variety of work by power electrically transmitted, including
a short line of railway constructed by the firm of Siemans, which was a
further development of the successful result already attained in Berlin
by Werner Siemans in the same direction. The further development of
the electrical transmission of energy is to take place in the utilization
of the power of Niagara.
POLICE AND FIRE ALARM SYSTEMS.
In the police and fire alarm signalling system in use in Boston and
several other cities, numbering signal boxes, containing telephones and
automatic signalling instruments, are placed on every patrolman's beat,
and are electrically connected with the signals which indicate at the sta-
tion-house the movement of the patrolmen over the territory under their
charge. The signalling from the station-house to the street station is
accomplished by the use of currents of electricity of a different charac-
ter from those employed to signal from the street station to the station-
house, and they sound a bell in the street station to indicate the recep-
tion by the station-house of an alarm signal, or to announce to the
patrolman that the station-house desires to speak to him by telephone.
The telephones are inductively connected with the circuit, and they are
so arranged, with relation to the signalling part of the system, that con-
versation may be carried on between twro or more points, signals may be
sent from a street station to the station-house, and police station.
The patrolman can either telephone or automatically transmit messages
to the station, or the station-house can signal the patrolman. Citizens
can also summon police assistance from any signal box.
The signalling system consists of three distinct and non-interfering
methods of communications, namely, automatic and manual signalling
from the street stations to the station-house, automatic and manual sig-
nalling from the station-house to the street stations, and telephonic com-
munication between the street stations and the station-house and vice
versa. These are arranged to operate over a single metallic circuit. The
signalling from the street stations to the station-house is further divided
into two classes: alarm signals, comprising signals directing the stationhouse
to send a patrol wagon or ambulance, or to use the telephone and
"patrol" or "duty" from the latter to the former, all simultaneously
over a single wire without interference or confusion.
Object Description
| Title | World's Columbian Exposition 002 |
| Subject LOC |
World's Columbian Exposition (1893 : Chicago, Ill.) World's Parliament of Religions (1893 : Chicago, Ill.) World's Congress of Representative Women (1893 : Chicago, Ill.) Chicago (Ill.)--1890-1900 |
| Subject IDA |
Religion Papers |
| Description | This is a collection of documents from the World's Columbian Exposition and the World Parliament of Religions, which was held in Chicago, Illinois, in 1893. |
| Date Original | 1893 |
| Searchable Date | 1890s (1890-1899) |
| Identifier | WCE 002 |
| Coverage Geographic | Chicago (Ill.) |
| Coverage Temporal | 1890s (1890-1900) |
| Type | Text |
| Collection Publisher | Meadville Lombard Theological School |
| Rights | These documents can be read, downloaded, and the transcripts printed for educationalpurposes. |
| Language | en |
| Contributing Institution | Meadville Lombard Theological School |
| Collection Name | Jenkin Lloyd Jones World’s Columbian Exposition Collection |
Description
| Title | 0128 |
| Subject LOC |
World's Columbian Exposition (1893 : Chicago, Ill.) World's Parliament of Religions (1893 : Chicago, Ill.) World's Congress of Representative Women (1893 : Chicago, Ill.) Chicago (Ill.)--1890-1900 |
| Subject IDA |
Religion Papers |
| Description | This is a collection of documents from the World's Columbian Exposition and the World Parliament of Religions, which was held in Chicago, Illinois, in 1893. |
| Date Original | 1893 |
| Searchable Date | 1890s (1890-1899) |
| Identifier | WCE 002 |
| Coverage Geographic | Chicago (Ill.) |
| Coverage Temporal | 1890s (1890-1900) |
| Type | Text |
| Collection Publisher | Meadville Lombard Theological School |
| Rights | These documents can be read, downloaded, and the transcripts printed for educationalpurposes. |
| Language | en |
| Contributing Institution | Meadville Lombard Theological School |
| Collection Name | Jenkin Lloyd Jones World’s Columbian Exposition Collection |
| Transcript | #002 The Worlds Columbian Exposition Scrapbook, p. 128 40 EXPOSITION STUDY CLASS REVIEW. England, to carry clay from a pit to the Glynde railway siding, whence it was delivered into trucks and taken by rail to its ultimate destina- tion. ELECTRICAL TRANSMISSION OF POWER. One of the most important applications of electricity to industrial purposes which the modern development of the electric light has led to is the electrical transmission of power. Siemans, a few years ago, pointed out that no further loss of power was involved in the transform- ation of electrical into mechanical energy than is due to friction and to the heating of the conducting wires by the resistance they oppose. This loss, careful researches have demonstrated, need not be more than 13 per cent., providing there is no loss on the connecting leads. The Paris Electrical Exposition in 1881 afforded interesting illustra- tions of the variety of work by power electrically transmitted, including a short line of railway constructed by the firm of Siemans, which was a further development of the successful result already attained in Berlin by Werner Siemans in the same direction. The further development of the electrical transmission of energy is to take place in the utilization of the power of Niagara. POLICE AND FIRE ALARM SYSTEMS. In the police and fire alarm signalling system in use in Boston and several other cities, numbering signal boxes, containing telephones and automatic signalling instruments, are placed on every patrolman's beat, and are electrically connected with the signals which indicate at the sta- tion-house the movement of the patrolmen over the territory under their charge. The signalling from the station-house to the street station is accomplished by the use of currents of electricity of a different charac- ter from those employed to signal from the street station to the station- house, and they sound a bell in the street station to indicate the recep- tion by the station-house of an alarm signal, or to announce to the patrolman that the station-house desires to speak to him by telephone. The telephones are inductively connected with the circuit, and they are so arranged, with relation to the signalling part of the system, that con- versation may be carried on between twro or more points, signals may be sent from a street station to the station-house, and police station. The patrolman can either telephone or automatically transmit messages to the station, or the station-house can signal the patrolman. Citizens can also summon police assistance from any signal box. The signalling system consists of three distinct and non-interfering methods of communications, namely, automatic and manual signalling from the street stations to the station-house, automatic and manual sig- nalling from the station-house to the street stations, and telephonic com- munication between the street stations and the station-house and vice versa. These are arranged to operate over a single metallic circuit. The signalling from the street stations to the station-house is further divided into two classes: alarm signals, comprising signals directing the stationhouse to send a patrol wagon or ambulance, or to use the telephone and "patrol" or "duty" from the latter to the former, all simultaneously over a single wire without interference or confusion. |
