About MODRATEC Lever Frame Kits
An interlocked frame.
Side view shows Diagram hinged up to reveal interlocking.
Auxiliary Switches and electrical terminals are seen below.
The key to creating the MODRATEC Lever Frame was to find the right balance between:
- the need for precision,
- the need for ruggedness,
- the need for affordability, and
- the need for construction with basic hand tools and moderate skills.
The MODRATEC Lever Frame is not intended to be a scale model, but a practical control device which nonetheless evokes genuine railway atmosphere.
The design aims have been achieved by adopting modular principles. MODRATEC performs all of the machining required - cutting, machining, drilling, tapping - taking care of critical accuracy. What is left for the modeller can then be achieved with basic hand tools.
The main construction is of solid brass with the lever spindle and fasteners being of stainless steel.
Interlocking Lever Frames include clear acrylic sheets cut to size for the interlock cover and signal diagram holder. Links between levers and tappets are formed from stainless steel wire.
The uniqueness of each kit is fully detailed in a correspondingly unique Construction Manual derived from the modeller's SigScribe4 or Interlocking Table File design. The Manual is web-based and accessed via a security-coded URL (web address).
Non-interlocking Frames: *---- Assembly with screwdriver; setting assembly using square; some fiddly assembly; optional painting.
Interlocking Frames (mechanical): ***-- Assembly with screwdriver and spanner; setting assembly using square; some fiddly assembly; optional painting; hacksawing of brass; filing of brass; cutting of brass rod; press-fitting locking pins; accurate marking-out required; creating signal diagram and/or pulling list (may be by computer or hand on thin card).
Interlocking Frames (Eemeck only): **--- Assembly with screwdriver; setting assembly using square; some fiddly assembly; optional painting; filing of brass; creating signal diagram and/or pulling list (may be by computer or hand on thin card).
Auxiliary Switches: *---- Pre-assembled units fitted with screwdriver.
Width The following widths apply according to number of levers:
- 6-levers = 66mm [diagram = 65mm]
- 12-levers = 131mm [diagram = 130mm]
- 18-levers = 196mm [diagram = 195mm]
- 24-levers = 261mm [diagram = 260mm]
- 30-levers = 326mm [diagram = 325mm]
- 36-levers = 392mm [diagram = 391mm]
- 42-levers = 457mm [diagram = 456mm]
- 48-levers = 522mm [diagram = 521mm]
- 54-levers = 587mm [diagram = 586mm]
- 60-levers = 652mm [diagram = 652mm]
The spindle projects approximately 5mm each side.
Conditional locking adds approximately 10mm on one or both sides.
The support bars for interlocking frames project 15mm each side.
Front to Rear The following front-rear dimensions apply according to number of interlocking slots:
- Non-interlocked = 92.0mm
- 2 or 3-slots = 106mm [diagram = 95mm]
- Eemeck only = 106mm [diagram = 95mm]
- 4-slots = 116mm [diagram = 104mm]
- 5-slots = 125mm [diagram = 114mm]
- 6-slots = 135mm [diagram = 124mm]
- 7-slots = 145mm [diagram = 133mm]
- 8-slots = 154mm [diagram = 143mm]
- 9-slots = 164mm [diagram = 153mm]
- 10-slots = 173mm [diagram = 162mm]
- 11-slots = 183mm [diagram = 172mm]
- 12-slots = 193mm [diagram = 181mm]
- 13-slots = 201mm [diagram = 191mm]
- 14-slots = 212mm [diagram = 201mm]
- 15-slots = 221mm [diagram = 210mm]
- 16-slots = 231mm [diagram = 220mm]
- 17-slots = 241mm [diagram = 229mm]
- 18-slots = 250mm [diagram = 239mm]
- 19-slots = 260mm [diagram = 249mm]
- 20-slots = 269mm [diagram = 258mm]
NOTE that for interlocking frames the locks cover and diagram panel projects forward a further 35mm.
Pitch The following pitches apply:
Levers are arranged in groups of 6. We call each group a Bay.
- Lever Pitch, e.g. centre of lever 1 to centre of lever 2 = 9.7mm
- Bay Pitch, e.g. centre of lever 1 to centre of lever 7 = 65.2mm