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Simple Electro-mechanical Buzzer | '''Simple Electro-mechanical Buzzer''' | ||
Image from page 688 of "St. Nicholas [serial]" (1873) | |||
Identifier: stnicholasserial322dodg | |||
Title: St. Nicholas [serial] | |||
Year: 1873 (1870s) | |||
Authors: Dodge, Mary Mapes, 1830-1905 | |||
Subjects: Children's literature | |||
Publisher: [New York : Scribner & Co.] | |||
Contributing Library: Information and Library Science Library, University of North Carolina at Chapel Hill | |||
Digitizing Sponsor: University of North Carolina at Chapel Hill | |||
'''Text Appearing Before Image:''' | |||
On the base,near the armature-block a binding-post is made fast. The current passes in through the wireA, goes through the coils and around to thescrew B, then through the armature to theblock and out through the wire C. In its cir-cuit the bolts are magnetized and they drawthe armature, but the instant they do so theloose spring-brass end is pulled away from thescrew at B and the circuit is broken,— the boltscease to be magnetized then and the armatureflies back as the spring-brass neck at D makesit do so. The loose brass-end then, on touch-ing the screw-point, conducts the current throughthe coils again with the continual vibrating ac-tion as long as the electric current is passingin at A and out at C. The greater the volumeof current the greater the number of vibrations,and to properly regulate the contact, the set-screw B must be adjusted at the right point. hole in the middle of it, an upholsterers brass-headed tack is driven for the under side of the | |||
'''Text Appearing After Image:''' | |||
GENERAL VIEW OF BUZZER. Paste pieces of heavy paper over the heads ofthe bolts to overcome residual magnetism. An electric bell is made the same as a buzzer,but, continuing on from the end of the armature,a wire or rod is mounted with a ball or clapperat the end, which strikes the bell as the currentcauses the armature to vibrate. TELEGRAPH-KEY AND SOUNDER. Telegraph instruments are very simple tomake and two boys can easily have a line be-tween their homes. The key is simply a contact maker andbreaker, so that the circuit can be convenientlyand rapidly opened and closed by the operator.A simple telegraph-key is shown in Fig. 28.The base-board is 4 by 6 inches and ^ inchthick. At the front end a small metal con-nector-plate is screwed fast, and, through a | |||
[Category:Electronics Components] | [Category:Electronics Components] | ||
Revision as of 14:02, 27 January 2018
Simple Electro-mechanical Buzzer
Image from page 688 of "St. Nicholas [serial]" (1873) Identifier: stnicholasserial322dodg Title: St. Nicholas [serial] Year: 1873 (1870s) Authors: Dodge, Mary Mapes, 1830-1905 Subjects: Children's literature Publisher: [New York : Scribner & Co.] Contributing Library: Information and Library Science Library, University of North Carolina at Chapel Hill Digitizing Sponsor: University of North Carolina at Chapel Hill
Text Appearing Before Image: On the base,near the armature-block a binding-post is made fast. The current passes in through the wireA, goes through the coils and around to thescrew B, then through the armature to theblock and out through the wire C. In its cir-cuit the bolts are magnetized and they drawthe armature, but the instant they do so theloose spring-brass end is pulled away from thescrew at B and the circuit is broken,— the boltscease to be magnetized then and the armatureflies back as the spring-brass neck at D makesit do so. The loose brass-end then, on touch-ing the screw-point, conducts the current throughthe coils again with the continual vibrating ac-tion as long as the electric current is passingin at A and out at C. The greater the volumeof current the greater the number of vibrations,and to properly regulate the contact, the set-screw B must be adjusted at the right point. hole in the middle of it, an upholsterers brass-headed tack is driven for the under side of the
Text Appearing After Image:
GENERAL VIEW OF BUZZER. Paste pieces of heavy paper over the heads ofthe bolts to overcome residual magnetism. An electric bell is made the same as a buzzer,but, continuing on from the end of the armature,a wire or rod is mounted with a ball or clapperat the end, which strikes the bell as the currentcauses the armature to vibrate. TELEGRAPH-KEY AND SOUNDER. Telegraph instruments are very simple tomake and two boys can easily have a line be-tween their homes. The key is simply a contact maker andbreaker, so that the circuit can be convenientlyand rapidly opened and closed by the operator.A simple telegraph-key is shown in Fig. 28.The base-board is 4 by 6 inches and ^ inchthick. At the front end a small metal con-nector-plate is screwed fast, and, through a
[Category:Electronics Components]
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