Electric Bells and All About Them: A Practical Book for Practical Men

by Selimo Romeo Bottone

Carshalton, Surrey,
November, 1888.

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CONTENTS.

chap.	page
I.	Preliminary Considerations	[1]
II.	On the Choice of Batteries for Electric Bell Work	[18]
III.	On Electric Bells and other Signalling Appliances	[59]
IV.	On Contacts, Pushes, Switches, Keys, Alarms, and Relays	[109]
V.	On Wiring, Connecting up, and Localising Faults	[144]

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LIST OF ILLUSTRATIONS.

Fig.	Page
[1].	Direction of current in cell	9
[2].	Direction of current out of cell	10
[3].	Bar and horse-shoe magnets	14
[4].	The Dynamo	16
[5].	The Smee cell	28
[6].	The Daniell cell	30
[7].	The Gravity cell	32
[8].	The Leclanché cell and parts	34
[9].	The Agglomerate cell	40
[10].	The Judson cell	42
[11].	The Battery in box	43
[12].	The Gent cell	44
[13].	The Bichromate cell	48
[14].	The Fuller cell	50
[15].	The Cells coupled in series	54
[16].	The Cells coupled in Parallel	57
[17].	Outline of electric bell	61
[18].	Frame of bell	62
[19].	E-shaped frame	63
[20].	Electro-magnet, old form	64
[20A].	Electro-magnet, modern form	65
[21].	Magnet frame	66
[21A].	Winder	72
[22].	Mode of joining electromagnet wires	73
[23].	Armature spring	74
[24].	Armature spring Another form	74
[25].	Platinum tipped screw	75
[26].	Platinum tipped spring	76
[27].	Binding screws	77
[28].	Bell or gong	78
[29].	Pillar and nuts	78
[30].	Washers	78
[31].	Trembling bell	81
[32].	Bell action enclosed in case	88
[33].	Ordinary trembling bells	90
[34].	Single stroke bell	91
[35].	Continuous ring bell	94
[36].	Release action	95
[37].	Continuous ringing with relay	96
[38].	Continuous ringing action with indicator	97
[39].	Relay and detent lever for indicator	97
[40].	Callow's attachment	99
[40A].	Thorpe's arrangement	101
[41].	Jensen bell, section	102
[42].	Jensen bell, exterior	104
[43A].	Circular bell	106
[43B].	Mining bell	106
[44].	Electric trumpet (Binswanger's)	107
[45].	Various forms of pushes	110
[46].	Pressel	111
[47].	Pull	112
[48].	Bedroom pull	113
[49A].	Bedroom pull Another form	114
[49B].	Floor contact, ball form	114
[50].	Burglar alarm	115
[51].	Burglar alarm Another form	115
[52].	Floor contact	115
[53].	Door contact	116
[54].	Sash contact	117
[55].	Shop door contact	117
[56A].	Closed circuit system, single	119
[56B].	Closed circuit system, double	119
[57].	Modified gravity, Daniell	120
[58].	Contact for closed circuit	121
[59].	Thermometer alarm	122
[60].	Fire alarm	123
[61A].	Fire alarm Another form	123
[61B].	Fire alarm Another form in action	123
[62].	Binswanger's "watch alarm" contact	125
[63].	Watchman's electric tell-tale clock	126
[64].	Lever switch, two-way	128
[65].	Morse key, double contact	133
[66].	Relay	134
[67].	Indicator, drop	137
[68].	Indicator, Semaphore	138
[69].	Indicator, Fall back	139
[70].	Indicator, Pendulum	140
[71].	Indicator, Coupled up	142
[72].	Indicator, Gent's tripolar	143
[73].	Soldering iron and wires	148
[74].	Push, interior of	151
[75].	Bell, battery and push	159
[76].	Bell, battery and push And earth return	160
[77].	Bell, and two pushes	161
[78].	Bell, two pushes and one pull	161
[79].	Two bells in parallel	162
[80].	Two bells in parallel Another mode	162
[81].	Two bells in parallel with two-way switch	163
[82].	Series coupler	163
[83].	Bell with local battery and relay	164
[84].	Continuous ringing bell with wire return	165
[85].	Bells with Morse keys for signalling	165
[86].	Bells with double contact pushes for signalling	166
[87].	Bells with double contact with one battery only	167
[88].	Two-way signalling with one battery only	168
[89].	Complete installation of bells, batteries, pushes, etc.	169
[90].	Mode of getting out plan or design	170
[91].	Lift fitted with bells	173
[92].	Magneto bell: generator	174
[93].	Magneto bell: Receiver	175
[94].	Magneto bell: Combined	176
[95].	Detector or galvanometer	176

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