A very simple and inexpensive annunciator may be made in the following way: Before taking up the construction of the annunciator it would be best to make a diagrammatic drawing of the circuit in which the annunciator is to operate.
In this case the annunciator must be constructed to give only two indications.
The simplest circuit that will require an annunciator is one where the bell may be operated from either of two push buttons.
A very simple annunciator for indicating two numbers can be made from a small box, Fig.
Cut the long end of the rod off so it projects through the face of the annunciator about 5/8 in.
How to Construct an Annunciator [416] Oftentimes a single electric bell may be connected in a circuit so that it can be operated from more than one push button.
Homemade Annunciator [57] When one electric bell is operated from two push-buttons it is impossible to tell which of the two push-buttons is being operated unless an annunciator or similar device is used.
The electricannunciator is a device that will indicate or record the various calls or signals that may be sent over the circuits to which the annunciator is connected.
This apparatus, which performs the same role as the one just described, is simply an ingenious modification of the annunciator used in hotels, etc.
The Company of the North employs two kinds of correspondence apparatus--the Guggemos and the annunciator apparatus.
It was then only a few main batteries which had an annunciator and which could through the conducting wires from their talents set all the small bells tinkling.
Their hate could only act as an annunciator for his power, but their affections would have neutralized it, even if their spirits never could enter into contact with his.
It comprises a great array of annunciator drops, spring jacks with plug seats, and connecting cords with metal plugs at their opposite ends.
In hotels or apartment houses an annunciator with a single bell may thus serve any number of push buttons.
In order that there may be means of designating the push button used--when the bell is rung--an annunciator is provided.
The windows and doors are sometimes connected with an annunciator which will indicate the place from which an alarm is given.
In a burglar-alarm system the annunciator numbers are arranged to indicate the windows and other openings at which entrance might be made.
An annunciator used for this purpose designates the exact point at which the contact is made and removes the necessity of searching for the place of attempted entrance.
The annunciator is placed at the most convenient place of observation, usually in the kitchen.
Call bells to be rung from the dining-room table are connected with an annunciator or to a separate bell.
When the alarm sounds the annunciator indicates the place from which the alarm is made.
A very simple annunciator may be attached to the bell, as shown in the following figures: [Illustration: Figs.
In practice, the annunciator may be located in any convenient place and wires run to that point.
Two windows and a door are connected up with an annunciatorhaving three drops, or numbers 1, 2, 3.
It will be understood that, in practice, the bell is mounted on or at the annunciator, and that, for convenience, the annunciator box has also a receptacle for the battery.
The annunciator flashed A and a pair of black-face comedians "opened the show," but they did not get it very far open for people were jamming in and elbows were silhouetted against the light.
I took out a pencil to make notes for corrections, but the annunciator said D, and a lady who would have done nicely as Venus came out attired as Cupid and the house rocked with welcome.
As he switched out of the ship's annunciator system, Captain Nails Andersen leaned back in his chair and stretched in relief, closing his eyes and running briefly over the details of the evacuation.
There was a brief pause, then Bessie's voice came formally over the all-stations annunciator system.
Numerous diagrams and much information concerning bell wiring is given in "Modern Wiring Diagrams and Descriptions", which should be consulted in case some complicated annunciator system is to be installed.
Only the very best bells and push buttons should be used, and it is advisable to avoid the use of the ordinary annunciator wire so often seen in connection with bell work.
Her horsy face, under a curling net, looked out of the annunciator plate.
Taylor's fingers began to play a tattoo on his annunciator board.
A cable of six wires enters this annunciator (Fig.
Take out two or three screws and the annunciator opens, revealing a series of electro-magnets like the one shown in Fig.
At 0840 hours on the fourth day out, my annunciator buzzed.
I picked up the annunciator mike and pushed the button.
FitzMaugham preferred the sort of annunciator that had to be acknowledged; Walton allowed the girl to break in on his privacy without the formality of a return buzz.
A moment later theannunciator said, "There's a closed-circuit call for you from Batavia, sir.
Sir, Mr. FitzMaugham absolutely forbids anyone to use theannunciator without his acknowledgment," the girl protested.
Walton heard an angry male voice muttering something in the outer office, and then the annunciator said, "He insists he must see you immediately in reference to a Happysleep commitment.
The everlasting annunciator chimed, and Walton switched on the screen.
Would you mind calling Mr. FitzMaugham on the annunciator and telling him I'm here?
He sent a note to Lee Percy requesting him to stop by and see him in an hour, and told his annunciator that for no reason whatsoever was he to be disturbed for the next sixty minutes.
The annunciator was still blinking violently; it seemed about to explode with the weight of pent-up, frustrated calls.
The annunciator panel in Walton's office was bright as a Christmas tree; the signal bulbs were all alight, each representing someone anxious to speak to him.
With nervous fingers he switched on the annunciator and said, "If there are any calls for me, take the message.
The drop or annunciator is of tubular form, and the shutter is so arranged on the front of the mounting strip C as to fall directly above the extension D of the tip spring.
The line signal in magneto switchboards is practically always in the form of an electromagnetic annunciator or drop.
