Cylinder Escapement Frictional Rest History Lookup
Return a sourced history, contact-mode, performance, or service fact about the cylinder escapement.
Description
A cylinder escapement uses a contact mode that differs from a lever escapement.
A cylinder escapement uses a contact mode that differs from a lever escapement. Frictional rest affects how its operation and historical performance are described.1
Return a sourced history, contact-mode, performance, or service fact about the cylinder escapement.
When to use Cylinder Escapement Frictional Rest History Lookup
Use this tool to return a sourced history, contact-mode, performance, or service fact about the cylinder escapement.
Choose a supported reference focus or prepare the watch measurements, evidence and explicit limits requested. Confirm units and date conventions before running.
How to use Cylinder Escapement Frictional Rest History Lookup and understand its results
- Choose a supported reference focus or prepare the watch measurements, evidence and explicit limits requested. Confirm units and date conventions before running.
- Enter historyFocus using the field table and calculation rules, then run the tool.
- Read fact, historyFocus, keyDate. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| historyFocus | Cylinder escapement history focus | string; one of "history", "contact", "performance", "limitation" | Required |
Select an exact supported historyFocus value from the field table and run the lookup. The implementation selects a fixed local table entry and returns the fields shown below. Matching is case-sensitive, with no trimming, synonyms or free-text search. Any keyDate output can be a date, period or context label.
result=stored entry for selected focus Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| fact | Verified escapement fact | string |
| historyFocus | Cylinder escapement history focus | string |
| keyDate | Key date or category | string |
{
"input": {
"historyFocus": "history"
},
"output": {
"fact": "Britannica records a 1695 patent associated with Edward Barlow, William Houghton, and Thomas Tompion, followed by George Graham's later refinement.",
"historyFocus": "history",
"keyDate": "1695"
}
}Limitations and assumptions
No contact friction, condition, accuracy or service requirement is measured. No sources are fetched or statements updated at runtime.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Extremely large text inputs are rejected. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Lever Escapement Pallet Face Roles Lookup: Return the mechanical role and adjustment caution for a Swiss lever pallet's locking or impulse face without inventing universal angles. For a complementary task, use Escapement Contact Friction Comparison Calculator: Compare caller-measured lubricated, unlubricated, and silicon-contact friction; lubricant-free operation does not mean zero friction or universal superiority.
References
Similar or alternative tools
- Lever Escapement Pallet Face Roles Lookup
Return the mechanical role and adjustment caution for a Swiss lever pallet's locking or impulse face without inventing universal angles.
- Escapement Contact Friction Comparison Calculator
Compare caller-measured lubricated, unlubricated, and silicon-contact friction; lubricant-free operation does not mean zero friction or universal superiority.