trapped-key interlocking

use of locks and keys for sequential control of equipment and machinery to ensure safe operation
Product railway_signalling_system Q1719216
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trapped-key interlocking

Summary

trapped-key interlocking is a railway signalling system[1]. It draws 22 Wikipedia views per month (railway_signalling_system category, ranking #3 of 5).[2]

Key Facts

  • trapped-key interlocking's image is recorded as J27 279 Schlüsselwerk ex Bf Schierke.jpg[3].
  • trapped-key interlocking's image is recorded as Trapped key interlock transfer block.JPG[4].
  • trapped-key interlocking's instance of is recorded as railway signalling system[5].
  • trapped-key interlocking's subclass of is recorded as interlock[6].
  • trapped-key interlocking's subclass of is recorded as protective device[7].
  • trapped-key interlocking's Commons category is recorded as Trapped-key interlockings[8].
  • trapped-key interlocking's Freebase ID is recorded as /m/06zq2l2[9].
  • trapped-key interlocking's facet of is recorded as safety[10].
  • trapped-key interlocking's facet of is recorded as access control[11].
  • trapped-key interlocking's Google Knowledge Graph ID is recorded as /g/120zzv9p[12].
  • trapped-key interlocking's Google Knowledge Graph ID is recorded as /g/11g4cqkg2k[13].

Why It Matters

trapped-key interlocking draws 22 Wikipedia views per month (railway_signalling_system category, ranking #3 of 5).[2]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). trapped-key interlocking. Retrieved May 3, 2026, from https://4ort.xyz/entity/trapped-key-interlocking
MLA “trapped-key interlocking.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/trapped-key-interlocking.
BibTeX @misc{4ortxyz_trapped-key-interlocking_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{trapped-key interlocking}}, year = {2026}, url = {https://4ort.xyz/entity/trapped-key-interlocking}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): trapped-key interlocking — https://4ort.xyz/entity/trapped-key-interlocking (retrieved 2026-05-03)

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