night-alarm

This transaction was like to give a grave cast to the conversation, when my uncle took notice that Mr Justice Frogmore had not made his appearance either at the night-alarm, or now at the general rendezvous.

The Expedition of Humphry Clinker 2004

In a night-alarm, for instance, when everyone in the dug-out is scrambling for his rifle and treading on everybody else’s face, being able to strike a light may make the difference between life and death.

Homage to Catalonia 1938

_ A good deal of trouble has been caused in the past by uncertainty in the closure of the night-alarm circuit at the drop contact.

Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910

In order to clearly indicate how a single battery and bell, or buzzer, may serve in connecting a number of line drops, reference is made to Fig. 274 which shows the connection between three different line drops and the night-alarm circuit.

Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910

The night-alarm contact is clearly shown immediately below the strip which supports the drop, this consisting of a spring adapted to be engaged by a lug on the shutter and pressed upwardly against a stationary contact when the shutter falls.

Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910

The usual night-alarm attachment is provided, the buzzer being shown at the upper right-hand portion of the cabinet.

Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910

Instead of the night-alarm buzzer being placed directly in the circuit that is closed by the drop, a relay _5_ and a high-voltage battery _6_ are placed in this circuit.

Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910

For this reason some other than a visual signal is necessary, and this need is met by the so-called night-alarm attachment.

Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910

This has not been found to be a reliable way of closing the night-alarm contacts and this method is indicated in these figures and in other figures in this work merely as a convenient way of representing the matter diagrammatically.

Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910

The night-alarm apparatus consists in the battery _1_ and the buzzer, or bell, _2_.

Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. George Patterson 1910