Lemelson Marker-Addressed Automatic Warehouse
US 3,119,501Rail travel, vertical positioning, bay transfer, and preset-count feedback
How It Works: Step-by-Step Mechanical & Physical Breakdown
The source assigns separate carrier motions to motors Mx, My, and Mz. In a normalized engineering reading, the selected bay is a pose : rail position, vertical level, and lateral transfer. A scanner emits a position event as it sees a marker; the preset counter state can be written per received event, with a motor-state transition when . The grant does not print a rail length, bay pitch, payload, motor power, sensor error, or cycle-time value, so the shared exhibit shows topology and state rather than fabricated SI performance figures.
Interactive Real-Time Physical Simulation
Drag to rotate · Pinch to zoom · Shared controls update the displayed modelDetailed Component Architecture
1Track-travelling carrier and first guide
Claim 1 places the first carriage on a first guide substantially parallel to the accessible side of the rack. That establishes the rail-address coordinate , but the drawing and claims do not state a rail length, wheel diameter, motor torque, or speed. The visual therefore maps its rail control only to normalized position.
2Vertical guide and second conveying means
The patent's second guide provides a vertical coordinate after rail travel. The source describes a motor-driven carriage and fork arrangement, not a sourced payload chart, mast stiffness, brake rating, acceleration curve, or safe operating envelope.
3Laterally extending fixture
The fixture supplies the transfer coordinate relative to the rack face. In the source sequence, horizontal travel and vertical positioning establish the bay address before the transfer motion proceeds. The patent gives the part relationship but not a measured stroke, contact force, or payload capacity.
4Marker scanner and preset counter
The source describes photoelectric markers and a limit-switch alternative. The abstract control relation is for each position event until . That is a discrete feedback mechanism, not a claim that the source supplies encoder resolution, latency, or fault-detection data.
Governing Equations & Engineering Principles
Preset-Count Marker Event Sequence
Industrial Automation & ControlClaim 1Remaining Down-Count
The grant describes a counter that uncounts as the scanner sees identifiers, then changes control state at the selected count. It does not state a count frequency or event timing.
The equation is a symbolic reading of the printed preset-count sequence. It intentionally omits numerical warehouse scale, payload, speed, motor, timing, and sensor-performance assumptions absent from the facsimile.
Historical Context: The issued claims show a physical warehouse address formed by guide travel, vertical movement, transfer, marker sensing, and a preset count; they do not justify a claim to all later automated storage systems.
Interactive Schematic Sheet (Fig. 1)
Figure 1 shows the source system's carrier, track, racking, lift, and fork relationships.
Select Any Numbered Pin
Click pins on the schematic or select from the list below to inspect historical specifications.
Why It Still Matters
The patent is a remarkably concrete bridge between warehouse geometry and discrete control: a selected location is reached by rails, lift, shuttle, marker, scan, count, and stop operations. In 1973, the Second Circuit's account of the related Triax system described automatic stackers used in warehouses and analyzed precisely those rail, elevator, shuttle, and marker-control differences. That makes this a useful historical exhibit for understanding why automated storage is a coupled mechanical-and-feedback problem, even though the 1964 grant is not a blanket claim to modern warehouse automation.
Legal Claims Decoder (6 Numbered Claims)
The Historical Bottleneck
Why Prior Art Failed
- •The source says earlier equipment for palletized or boxed goods required manual direction or manual remote control.
- •It describes conventional stacker cranes as requiring attendance by an operator.
- •It identifies a closed-loop belt-conveyor arrangement as limited to a particular section and substantially a single storage level.
Patent Wars & Legal Litigations
- The printed grant says six claims; the edition includes all six, including the dependent limit-switch alternative.
- The official text calls the 1961 application a continuation of a July 1954 application; the court later accepted the earlier filing date for patentability analysis.
- The visual uses only normalized geometry because the facsimile does not state warehouse dimensions, payload, travel speed, motor power, or sensor precision.