Brake Tests

399 Developments.....................1101 Diagrammatic view, universal valve. 55 Direct release, U C equipment... .. . 63 Discharge valve for train signal . 61 Distance recorder.. .. .. .. . ... 27 Distributing valve, safety valve. _18 E Early tests............................4 Efficiency, brake rigging....129, 140, 149 277, 284 Efficient brake operation _____________5 Electric application with closed angle cock.................................. 109 I Electric control....................... 8 ! Electric emergency application 66, 92, 114| Electric emergency application, auto- matic...................................66 Electric portion, universal valve_50, 58 " release.......................65 " service application...........65,......73,..111 " signal system............. 68 Electro-pneumatic equipment...........65 Emergency application, P M equip- ment............................. 43, 85 Emergency application following serv- ice, P M equipment ...44, 75, 81 Emergency application, P M features of U C equipment.......................89| Emergency application, U C equip- ment.............................63, 89, 114 Emergency application following service, U C equipment .64, 77, 81, 85 Emergency application, comparison of P M and U C equipment................92 Emergency application, comparison U C pneumatic and electro-pneu- matic equipment 114 Emergency application on depletion of brake pipe pressure. . .. 64 Emergency stops, summary of . ... 233 " Electro-pneumatic equipment...............125| Equalizing portion, Universal valve .50, 57| Equated stops 168| Equipment, features of .................. 7 : Equivalent of P M brake .......... ___66| Estimated train stops...........198| ET Equipment..................18, 67| Friction of rails..........27, 31, 154 Functions of adequate air brake mechanism .................... . 48 Fundamental principles of air brake design........................ 46 G Galton-Westinghouse Tests.........4 Graduated release .53, 56, 63, 100,103 H Hardness of brake shoes . 234, 251, 281 High braking power, locomotive and tender ....................... 67, 156 High speed reducing valves 19, 36, 42, 43 Humidity.. . ............ 151, 154 i Improvements in air brake.........110 Improvement in brake rigging, fea- tures open................... 121 Indicator..................20, 22, 25 Intermittent tests................ 252 J Junction box, U C equipment ........60 K Kapteyn chronograph .............21, 28 L Length of stops.....4, 148, 246 Lever arrangement............... .17 Lifting of brake rigging . 123, 124, 141 Locomotive brake rigging..........133 " braking power............67, 147, 156 Locomotive observations ________ 19 Locomotive weight ................ 18 Low hung brake shoes..............’ 133 M F Feed valve............................. 18 Fibre stress........................ 121 Fit of brake shoe to wheel..... ............ 263 Flanged brake shoes.............200, 238 " " " wear of 278 to 281 Flattening of wheels ... .. .. .... .. ...... 153 Flexibility of brake shoes... .....237, 263 Friction of brake shoes..........149, 227, 274 " " " definition 244, 247 Friction of brake shoes, effect of rate cooling.......................-.........281 F riction of brake shoes, effect of speed _ on. - 268 Friction of brake shoes, effect of width and length 274 |Machine tests, brake shoes .......238 Machine tests, relation to road tests..........................84, 131 |Magnet valves................... 66 |Mahwah......................7, 238, 241 Mean co-efficient of friction, brake shoes—definition..............244, 247 Mean co-efficient of friction, clasp |vs. single shoe...................274 Method of conducting tests .......18, 244 Mixed equipment, improvement of release.......................... 109 : Mixed equipment stops 73, 95 to 100 N Nominal braking power, definition of. 146