A Manual of Telephony
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In our eReader you can find the full English version of the book. Read A Manual of Telephony Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Manual of Telephony
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96, and in side elevation by fig. 97.
Mounted on a brass base is an electro-magnet M, with projecting cores upon which is fixed a brass cross-piece. Vertically between the coils F'g- 96- I full size.
F'g- 97- S full size.
is pivotted an axle a, upon which at the lower part is fitted the relay tongue T, and at the upper end the WALL ROSETTES. 141 armature A, the ends of which are situated on opposite sides of the two cores of the electro-magnet. The platinum contact-points at the end of the tong...ue rest against the end of one of two adjustable screws b and c. Normally the tension of the spring s holds the tongue against b, which is fitted with an insulating (ivory) point ; but the passing of a current through the coils causes the attraction of the armature and brings the tongue over to contact c, thus closing the local circuit of the bell and a battery.
This instrument is often fitted inside the telephone case, but when required separate it is mounted upon a wooden base and fitted with a tubular brass cover with glass top as shown in section in fig.
What to read after A Manual of Telephony?
You can find similar books in the "Read Also" column, or choose other free books by Preece, William Henry, Sir, 1834-1913 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
96, and in side elevation by fig. 97.
Mounted on a brass base is an electro-magnet M, with projecting cores upon which is fixed a brass cross-piece. Vertically between the coils F'g- 96- I full size.
F'g- 97- S full size.
is pivotted an axle a, upon which at the lower part is fitted the relay tongue T, and at the upper end the WALL ROSETTES. 141 armature A, the ends of which are situated on opposite sides of the two cores of the electro-magnet. The platinum contact-points at the end of the tong...ue rest against the end of one of two adjustable screws b and c. Normally the tension of the spring s holds the tongue against b, which is fitted with an insulating (ivory) point ; but the passing of a current through the coils causes the attraction of the armature and brings the tongue over to contact c, thus closing the local circuit of the bell and a battery.
This instrument is often fitted inside the telephone case, but when required separate it is mounted upon a wooden base and fitted with a tubular brass cover with glass top as shown in section in fig.
What to read after A Manual of Telephony?
You can find similar books in the "Read Also" column, or choose other free books by Preece, William Henry, Sir, 1834-1913 to read onlineMoreLess
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