Leeds Northrup

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Leeds  Northrup 4385 Shunt Box Operating Manual w schematicIssue 3
Leeds Northrup 4385 Shunt Box Operating Manual w schematicIssue 3
$21.25
quality
Leeds  Northrup Co 4030 B 100 Ohms Resistor TLE2281
Leeds Northrup Co 4030 B 100 Ohms Resistor TLE2281
$100.00
quality
LEEDS NORTHRUP 018485 262294EMF 0 TO 3758MV PRINTED PCB CIRCUIT BOARD B472183
LEEDS NORTHRUP 018485 262294EMF 0 TO 3758MV PRINTED PCB CIRCUIT BOARD B472183
$20.53
quality
Honeywell Leeds  Northrup Progeny CTX Controller
Honeywell Leeds Northrup Progeny CTX Controller
$750.00
quality
LEEDS NORTHRUP 445859 PRE AMPLIFIER A1A1AXA2X REV P2 PCB CIRCUIT BOARD B472178
LEEDS NORTHRUP 445859 PRE AMPLIFIER A1A1AXA2X REV P2 PCB CIRCUIT BOARD B472178
$86.43
quality
LEEDS  NORTHRUP CPU BOARD 228289 USED FUNCTIONAL
LEEDS NORTHRUP CPU BOARD 228289 USED FUNCTIONAL
$500.00
quality
Leeds  Northrup 4306 Kelvin Bridge Operating Manual Issue 2
Leeds Northrup 4306 Kelvin Bridge Operating Manual Issue 2
$17.00
quality
LEEDS  NORTHRUP LPU BOARD 228289 USED FUNCTIONAL
LEEDS NORTHRUP LPU BOARD 228289 USED FUNCTIONAL
$250.00
quality
LEEDS  NORTHRUP MOTHER BOARD 074427 USED FUNCTIONAL
LEEDS NORTHRUP MOTHER BOARD 074427 USED FUNCTIONAL
$150.00
quality
LEEDS  NORTHRUP 15 PT ANALOG INPUT CARD 078691 USED FUNCTIONAL
LEEDS NORTHRUP 15 PT ANALOG INPUT CARD 078691 USED FUNCTIONAL
$200.00
quality
Leeds  Northrup 4287 Kelvin Bridge Operating Manual w schematic
Leeds Northrup 4287 Kelvin Bridge Operating Manual w schematic
$21.25
quality
Leeds  Northrup 4287 Precision D C Kelvin Bridge Parts List1966
Leeds Northrup 4287 Precision D C Kelvin Bridge Parts List1966
$12.75
quality
LEEDS  NORTHRUP DUAL OUTPUT CONTROL BOARD 074411 USED FUNCTIONAL
LEEDS NORTHRUP DUAL OUTPUT CONTROL BOARD 074411 USED FUNCTIONAL
$50.00
quality
Leeds  Northrup Pressure Transmitter
Leeds Northrup Pressure Transmitter
$179.95
quality
Leeds  Northrup 2437 DC Null Detector Operating Manual w schematic
Leeds Northrup 2437 DC Null Detector Operating Manual w schematic
$21.25
quality
LEEDS  NORTHRUP ANALOG OUTPUT CARD 074471 USED FUNCTIONAL
LEEDS NORTHRUP ANALOG OUTPUT CARD 074471 USED FUNCTIONAL
$150.00
quality
LEEDS  NORTHRUP 7075 1 018 120 001 000 SPECIFIC RESISTANCE 120 240 VAC
LEEDS NORTHRUP 7075 1 018 120 001 000 SPECIFIC RESISTANCE 120 240 VAC
$139.99
quality
Leeds  Northrup 2284 abc and d Galvanometers Directions Manual
Leeds Northrup 2284 abc and d Galvanometers Directions Manual
$21.25
quality
LEEDS NORTHRUP 445672 PRINTED CARD MODULE REV J3 PCB CIRCUIT BOARD B472421
LEEDS NORTHRUP 445672 PRINTED CARD MODULE REV J3 PCB CIRCUIT BOARD B472421
$129.43
quality
LEEDS  NORTHRUP Temperature Potentiometer Bridge 8693
LEEDS NORTHRUP Temperature Potentiometer Bridge 8693
$69.95
quality
Leeds  Northrup 923 Numatron Digital Indicator Directions Manual w schematics
Leeds Northrup 923 Numatron Digital Indicator Directions Manual w schematics
$21.25
quality
LEEDS NORTHRUP 444923 DRIVER CARD REV K PCB CIRCUIT BOARD B472426
LEEDS NORTHRUP 444923 DRIVER CARD REV K PCB CIRCUIT BOARD B472426
$201.43
quality
LEEDS NORTHRUP 444922 LOGIC MODULE REV H PCB CIRCUIT BOARD B472434
LEEDS NORTHRUP 444922 LOGIC MODULE REV H PCB CIRCUIT BOARD B472434
$186.43
quality
Leeds  Northrup 80 Series3 Action PAT Controller Instruction Manual w sch
Leeds Northrup 80 Series3 Action PAT Controller Instruction Manual w sch
$21.25
quality
Leeds  Northrup 60 Series Control Using Three Action PAT Control Unit Manual
Leeds Northrup 60 Series Control Using Three Action PAT Control Unit Manual
$21.25
quality
LEEDS  NORTHRUP 31075707 NSPP 31075707
LEEDS NORTHRUP 31075707 NSPP 31075707
$412.65
quality
LEEDS NORTHRUP 056357 9436 096 DISPLAY LCD REV D D1 PCB CIRCUIT BOARD B472503
LEEDS NORTHRUP 056357 9436 096 DISPLAY LCD REV D D1 PCB CIRCUIT BOARD B472503
$287.43
quality
LEEDS  NORTHRUP 9912 RUN UP BOX
LEEDS NORTHRUP 9912 RUN UP BOX
$55.50
quality
LEEDS NORTHRUP 056332 REV B2 PCB CIRCUIT BOARD B472368
LEEDS NORTHRUP 056332 REV B2 PCB CIRCUIT BOARD B472368
$28.53
quality
LEEDS NORTHRUP 205376 CONTROL IMPULSE LOGIC II REV A PCB CIRCUIT BOARD B472478
LEEDS NORTHRUP 205376 CONTROL IMPULSE LOGIC II REV A PCB CIRCUIT BOARD B472478
$129.43
quality
Leeds  Northrup Electrode 117481 New
Leeds Northrup Electrode 117481 New
$170.00
quality
Leeds  Northrup Millivolt Potentiometers 8691 2 With Manual Built in Carry Box
Leeds Northrup Millivolt Potentiometers 8691 2 With Manual Built in Carry Box
$64.95
quality
Leeds  Northrup Chart Recorder mdl 201 11 000 NN21
Leeds Northrup Chart Recorder mdl 201 11 000 NN21
$29.98
quality
LEEDS  NORTHRUP 074427 USPP 074427
LEEDS NORTHRUP 074427 USPP 074427
$551.25
quality
Vintage Leeds  Northrup Galvanometer in a Wodden Case
Vintage Leeds Northrup Galvanometer in a Wodden Case
$29.99
quality
VTG Antique Open Dial Impedance Bridge BECKMAN WHEATSTONE LEEDS
VTG Antique Open Dial Impedance Bridge BECKMAN WHEATSTONE LEEDS
$86.00
quality
Leeds  Northrup 660912 Speedomax H Chart Paper
Leeds Northrup 660912 Speedomax H Chart Paper
$13.95
quality
Leeds  Northrup PCB 234435
Leeds Northrup PCB 234435
$125.00
quality
Leeds  Northrup PCB 196443
Leeds Northrup PCB 196443
$100.00
quality
Lot of 3 Leeds  Northrup Intrinsic Safety Barrier P N 316569
Lot of 3 Leeds Northrup Intrinsic Safety Barrier P N 316569
$75.00
quality
LEEDS  NORTHRUP 074463 A2 B2 CONTROL BOARD
LEEDS NORTHRUP 074463 A2 B2 CONTROL BOARD
$100.00
quality
VINTAGE LEEDS NORTHRUP DECADE VOLTAGE RESISTANCE BOX TYPE 4749 PARTS
VINTAGE LEEDS NORTHRUP DECADE VOLTAGE RESISTANCE BOX TYPE 4749 PARTS
$34.99
quality
VINTAGE LEEDS NORTHRUP PORTABLE POINTER TYPE GALVANOMETER GEM 27 WOODEN CASE
VINTAGE LEEDS NORTHRUP PORTABLE POINTER TYPE GALVANOMETER GEM 27 WOODEN CASE
$34.99
quality
LEEDS  NORTHRUP 078691 REV D
LEEDS NORTHRUP 078691 REV D
$350.00
quality
LEEDS  NORTHRUP 074427 PC BOARD
LEEDS NORTHRUP 074427 PC BOARD
$300.00
quality
Leeds  Northrup Speedomax XL Recorder 600 Series Direction Operating Manual
Leeds Northrup Speedomax XL Recorder 600 Series Direction Operating Manual
$59.50
quality
Leeds  Northrup Speedomax W L for OneTwo Pen Recorders Operating Manual
Leeds Northrup Speedomax W L for OneTwo Pen Recorders Operating Manual
$29.75
quality
Leeds  Northrup Speedomax W Parts Catalog 179018
Leeds Northrup Speedomax W Parts Catalog 179018
$34.00
quality
LEEDS  NORTHRUP 04905 XX1 33 333 20 000 000 00 NSFP 04905XX133333200
LEEDS NORTHRUP 04905 XX1 33 333 20 000 000 00 NSFP 04905XX133333200
$651.00
quality
LEEDS  NORTHRUP 04908 001 33 333 20 03 000 000 NSFP 0490800133333200
LEEDS NORTHRUP 04908 001 33 333 20 03 000 000 NSFP 0490800133333200
$651.00
quality
Leeds  Northrup Speedomax W with Series 80 Controller Operating Manual
Leeds Northrup Speedomax W with Series 80 Controller Operating Manual
$34.00
quality
LEEDS  NORTHRUP 074463 PC BOARD
LEEDS NORTHRUP 074463 PC BOARD
$285.00
quality
Leeds  Northrup Speedomax W with Series 60 Controller Operating Manual
Leeds Northrup Speedomax W with Series 60 Controller Operating Manual
$34.00
quality
Leeds Northrup 056357 LCD Board
Leeds Northrup 056357 LCD Board
$150.00
quality
NEW LEEDS AND NORTHRUP 4973 1 333 7 000 CONDUCTIVITY CELL
NEW LEEDS AND NORTHRUP 4973 1 333 7 000 CONDUCTIVITY CELL
$389.99
quality
NEW LEEDS NORTHRUP 046315 PRINTED CARD REV H1 H4 PCB CIRCUIT BOARD B472771
NEW LEEDS NORTHRUP 046315 PRINTED CARD REV H1 H4 PCB CIRCUIT BOARD B472771
$74.43
quality
Leeds  Northrup PCB 445859
Leeds Northrup PCB 445859
$150.00
quality
Leeds  Northrup PCB 445847
Leeds Northrup PCB 445847
$350.00
quality
Leeds  Northrup Co  5305 Test Set Resistance Mesurment
Leeds Northrup Co 5305 Test Set Resistance Mesurment
$100.00
quality
LEEDS AND NORTHRUP PRESSURE TRANSMITTER MODEL 2610
LEEDS AND NORTHRUP PRESSURE TRANSMITTER MODEL 2610
$175.00
quality
LEEDS  NORTHRUP 078697 ADAPTER MODULE REV A1 A1
LEEDS NORTHRUP 078697 ADAPTER MODULE REV A1 A1
$775.00
quality
LEEDS  NORTHRUP 078697 ADAPTER MODULE REVB
LEEDS NORTHRUP 078697 ADAPTER MODULE REVB
$775.00
quality
Leeds and Northrup 4030 B 100 Ohm Standard Resistor
Leeds and Northrup 4030 B 100 Ohm Standard Resistor
$50.00
quality
Leeds  Northrup 8690 2 Millivolt Potentiometer Direction Operating Manual
Leeds Northrup 8690 2 Millivolt Potentiometer Direction Operating Manual
$21.25
quality
Leeds  Northrup 8690 Millivolt Potentionmeter Directions Operating Manual
Leeds Northrup 8690 Millivolt Potentionmeter Directions Operating Manual
$21.25
quality
Leeds  Northrup 8687 Volt Potentiometer Directions Operating Manual w schematic
Leeds Northrup 8687 Volt Potentiometer Directions Operating Manual w schematic
$21.25
quality
Leeds  Northrup 8686 Millivolt Potentiometer Directions Operating Manual w sche
Leeds Northrup 8686 Millivolt Potentiometer Directions Operating Manual w sche
$21.25
quality
Leeds  Northrup 8667 Potentiometer Directions Operating Manual
Leeds Northrup 8667 Potentiometer Directions Operating Manual
$21.25
quality
Leeds  Northrup 8662 Portable Precision Potentiometer Direction Operating Book
Leeds Northrup 8662 Portable Precision Potentiometer Direction Operating Book
$21.25
quality
Leeds  Northrup 8630 Series Optical Pyrometer Operating Manual w diagrams
Leeds Northrup 8630 Series Optical Pyrometer Operating Manual w diagrams
$21.25
quality
Leeds  Northrup 8411 Fixed Temperature Standard Direction Operating Manual
Leeds Northrup 8411 Fixed Temperature Standard Direction Operating Manual
$21.25
quality
Leeds  Northrup 8401 Constant Temperature Oil Bath Assembly Operating Manual
Leeds Northrup 8401 Constant Temperature Oil Bath Assembly Operating Manual
$17.00
quality
Leeds  Northrup 8248 8249 Rotary Selector Switches Operating Manual
Leeds Northrup 8248 8249 Rotary Selector Switches Operating Manual
$21.25
quality
Leeds  Northrup 8079 B 8079 1 B ER Thermometer Bridge Calibration Procedure
Leeds Northrup 8079 B 8079 1 B ER Thermometer Bridge Calibration Procedure
$21.25
quality
Leeds  Northrup 8072 Type G 4 Mueller Bridge Operating Manual w diagrams
Leeds Northrup 8072 Type G 4 Mueller Bridge Operating Manual w diagrams
$17.00
quality
Leeds  Northrup 8069 B Mueller Temperature Bridge Operating Manual w diagrams
Leeds Northrup 8069 B Mueller Temperature Bridge Operating Manual w diagrams
$21.25
quality
Leeds  Northrup 10827112 544006 Speed O Max 165 Chart Paper NEW
Leeds Northrup 10827112 544006 Speed O Max 165 Chart Paper NEW
$134.99
quality
Leeds  Northrup 660001 Speed O Max H Chart Paper 0 2000 Deg Range NEW
Leeds Northrup 660001 Speed O Max H Chart Paper 0 2000 Deg Range NEW
$124.99
quality
LEEDS NORTHRUP 099089 PCB CIRCUIT BOARD B472834
LEEDS NORTHRUP 099089 PCB CIRCUIT BOARD B472834
$77.43
quality
Leeds  Northrup 600014 SpeedOMax H Chart Paper 0 2000 Deg Range 182x25mm NEW
Leeds Northrup 600014 SpeedOMax H Chart Paper 0 2000 Deg Range 182x25mm NEW
$126.99
quality
Leeds  Northrup 01019561 544012 Speed O Max 165 Chart Paper NEW
Leeds Northrup 01019561 544012 Speed O Max 165 Chart Paper NEW
$139.99
quality
NEW LEEDS NORTHRUP 055867 MULTIRANGE PCB CIRCUIT BOARD SERVO AMPLIFIER B478170
NEW LEEDS NORTHRUP 055867 MULTIRANGE PCB CIRCUIT BOARD SERVO AMPLIFIER B478170
$86.43
quality
Millivolt Testing Unit Reactor MTR Real Inst Leeds  Northrup 1138212
Millivolt Testing Unit Reactor MTR Real Inst Leeds Northrup 1138212
$206.10
quality
LEEDS  NORTHRUP CO MILLIVOLT POTENTIONMETER CAT  8686
LEEDS NORTHRUP CO MILLIVOLT POTENTIONMETER CAT 8686
$25.00
quality
Vintage Leeds  Northrup Decade Resistor Calibrator Box 4776 0 1000 ohm
Vintage Leeds Northrup Decade Resistor Calibrator Box 4776 0 1000 ohm
$30.00
quality
Leeds  Northrup 7591 Volt Box Potentiometer
Leeds Northrup 7591 Volt Box Potentiometer
$75.00
quality
New Leeds  Northrup Conductivity Cell w TempComp 4973 1 210 7 000 A1 957
New Leeds Northrup Conductivity Cell w TempComp 4973 1 210 7 000 A1 957
$385.00
quality
LEEDS  NORTHRUP RUN UP BOX 9912
LEEDS NORTHRUP RUN UP BOX 9912
$49.99
quality
LEEDS  NORTHRUP THOMAS TYPE 1 OHM STANDARD 4210 NICE
LEEDS NORTHRUP THOMAS TYPE 1 OHM STANDARD 4210 NICE
$1,250.00
quality
VINTAGE LEEDS  NORTHRUP 7553 TYPE K3 UNIVERSAL POTENTIOMETER
VINTAGE LEEDS NORTHRUP 7553 TYPE K3 UNIVERSAL POTENTIOMETER
$125.00
quality
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Leeds Northrup

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All My STUFF !!!!!!!!!!!!! Part 18

History Of UK Car Registrations

Number Plate History
brief history of the u.k. car number plate system
"The Motor Car Act 1903" started everything off .It said that every car had to be registered with a county council or county borough council, and every car had to display a unique identifying number issued to them by such a council .
Initially each council was issued one letter to use on the number plates , they could not have known how popular the motor car was to become and as the number of cars increased they quickly ran out of combinations ,so they started to use two and then three letter combinations.
By 1963 several councils were close to the end of their allocation, so a 7th digit was added to the Number Plate System. This extra digit was a letter ,so post 1963 numbers had three letters then a space then up to 3 numbers and then another letter this last letter gave the age of the car.
Suffix Number Plate System
The Suffix Number Plate System
Table of "Age identifier " Suffix Letters.
A 1 Jan 63 - 31 Dec 63 H 1 Aug 69 - 31 Jul 70 R 1 Aug 76 - 31 Jul 77
B 1 Jan 64 - 31 Dec 64 J 1 Aug 70 - 31 Jul 71 S 1 Aug 77 - 31 Jul 78
C 1 Jan 65 - 31 Dec 65 K 1 Aug 71 - 31 Jul 72 T 1 Aug 78 - 31 Jul 79
D 1 Jan 66 - 31 Dec 66 L 1 Aug 72 - 31 Jul 73 V 1 Aug 79 - 31 Jul 80
E 1 Jan 67 - 31 Jul 67 M 1 Aug 73 - 31 Jul 74 W 1 Aug 80 - 31 Jul 81
F 1 Aug 67 - 31 Jul 68 N 1 Aug 74 - 31 Jul 75 X 1 Aug 81 - 31 Jul 82
G 1 Aug 68 - 31 Jul 69 P 1 Aug 75 - 31 Jul 76 Y 1 Aug 82 - 31 Jul 83
You may notice that a further complication to the number system came in 1967 when , under pressure from the motor car industry the changeover date was moved to August in an attempt to smooth out new car puchasing by the public.
It may also be noted that the letters I and Z ( used for N.Ireland) are missing as are Q ( reserved for kit cars and repaired write offs etc) and the letter U ( reason unknown).

The letters I Q Z O and U were never used as a suffix letter in fact I Q and Z were never used at all.
By 1983 they faced the same problem but deftly extended the system by reversing the number plate giving a letter first then up to 3 numbers then a space then 3 more letters. The first letter now gave the age of the car.
Prefix number plate system
The Prefix Number Plate System
Table of "Age identifier " Prefix Letters.
A 1 Aug 83 - 31 Jul 84 H 1 Aug 90 - 31 Jul 91 R 1 Aug 97 - 31 Jul 98
B 1 Aug 84 - 31 Jul 85 J 1 Aug 91 - 31 Jul 92 S 1 Aug 98 - 28 Feb 99
C 1 Aug 85 - 31 Jul 86 K 1 Aug 92 - 31 Jul 93 T 1 Mar 99 - 31 Aug 99
D 1 Aug 86 - 31 Jul 87 L 1 Aug 93 - 31 Jul 94 V 1 Sep 99 - 29 Feb 00
E 1 Aug 87 - 31 Jul 88 M 1 Aug 94 - 31 Jul 95 W 1 Mar 00 - 31 Aug 00
F 1 Aug 88 - 31 Jul 89 N 1 Aug 95 - 31 Jul 96 X 1 Sep 00 - 28 Feb 01
G 1 Aug 89 - 31 Jul 90 P 1 Aug 96 - 31 Jul 97 Y 1 Mar 01 - 31 Aug 01
It may be noted that the letters I and Z ( used for N.Ireland) are missing as are Q ( reserved for kit cars and repaired write offs etc) and the letter U ( reason unknown).

By 2001 the problem was looming again and the current system was introduced. Now each number plate has 7 digits and the first two letters give the region of the country where the car was first registered, followed by two numbers which give the age of the car and then three random letters . An example of this could be NE51 XXX. The NE tells you the car is from the North East of England (a table of these region identifiers is below ). The 51 tells you it was registered in September 2001 and the last three letters mean nothing.
Current Number Plate system
Current U.K. Number Plates System
The first two digits of each car registration denote the area of the country where the vehicle was first registered.
First Letter Issuing office Second Letter Possibilities
A Peterborough A B C D E F G H J K L M N
Norwich O P R S T U
Ipswich V W X Y
B Birmingham A - Y
C Cardiff A B C D E F G H J K L M N O
Swansea P R S T U V
Bangor W X Y
D Chester A B C D E F G H J K
Shrewsbury L M N O P R S T U V W X Y
E Chelmsford A - Y
F Nottingham A B C D E F G H J K L M N P
Lincoln R S T V W X Y
G Maidstone A B C D E F G H J K L M N O
Brighton P R S T U V W X Y
H Bournemouth A B C D E F G H J
Portsmouth K L M N O P R S T U V W X Y
HW Reserved for the Isle of Wight
K Luton A B C D E F G H J K L
Northampton M N O P R S T U V W X Y
L Wimbledon A B C D E F G H J
Stanmore K L M N O P R S T
Sidcup U V W X Y
M Manchester A - Y
N Newcastle A B C D E G H J K L M N O
Stockton P R S T U V W X Y
O Oxford A - Y
P Preston A B C D E F G H J K L M N O P R S T
Carlisle U V W X Y
R Reading A - Y
S Glasgow A B C D E F G H J
Edinburgh K L M N O
Dundee P R S T
Aberdeen U V W
Inverness X Y
V Worcester A - Y
W Exeter A B C D E F G H J
Truro K L
Bristol M N O P R S T U V W X Y
Y Leeds A B C D E F G H J K
Sheffield L M N O P R S T U
Beverley V W X YHave a look at my historic rally blog :-
More Historic Rally Information

My business website :-
Private Number Plates

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