Absolute-block · Mechanical locking · Offline
Rehearse real mechanical interlocking on a brass-style lever frame—pull, lock, route, and ring absolute-block bells offline, with plain-language reasons when a move is illegal.
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About the workbench
Lever Frame Desk is a pocket workbench for heritage signal-box volunteers, railway ops students, and absolute-block learners who need the rules in their hands, not in a slide deck. Open a complete seed box—Ashcombe Terminus, Millford Crossing, or Cedar Halt—and work its numbered levers tinted by function: red signals, black points, blue facing-point locks, brown releases.
Every pull is checked against the interlocking matrix; blocked moves surface short reason cards such as “Up starter locked—facing-point lock 5 not in.” Set named routes in legal order, toggle detection lamps like a real frame, practice block-bell beats on a second-instrument panel, and walk fault drills with reminder collars until the box is safe again. No live network, no accounts, no maps sandbox—just tactile competence you can rehearse anywhere.
Features on the frame
Choose Ashcombe Terminus (12), Millford Crossing (16), or Cedar Halt (8) and open a full brass-style frame with lever list, track diagram, and locking table already loaded.
Pull or replace any lever; the matrix allows or blocks instantly and shows a plain reason card—facing-point lock not in, opposing call-on conflict, and more.
Pick Platform 1 to Up Main, Down Main to Bay, or Shunt to Goods Spur and follow animated lever-order highlights until signals are free.
Practice call-attention, train-entering, out-of-section, and obstruction-removed beats with click audio; apply reminder collars and walk emergency release paths.
Toggle point detection and FPL lamps on the frame diagram; signal levers stay locked until detection reads normal, matching mechanical behaviour.
Run a route-setting clock, review hits, blocks, and unfinished work, then render a frame briefing image for volunteer handoff—still fully offline.
No live network, no maps sandbox, no gambling. Just levers, locks, bells, and plain reasons when a move is illegal.
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