Detent Escapement Impulse Rate
Calculate the single-impulse rate of a detent escapement, which delivers one impulse per full two-beat balance oscillation.
Description
A detent escapement supplies one impulse per full two-beat oscillation.
A detent escapement supplies one impulse per full two-beat oscillation. Beat counts therefore exceed impulse counts by a factor of two.1
Calculate the single-impulse rate of a detent escapement, which delivers one impulse per full two-beat balance oscillation.
When to use Detent Escapement Impulse Rate
Use this tool to calculate the single-impulse rate of a detent escapement, which delivers one impulse per full two-beat balance oscillation.
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 Detent Escapement Impulse Rate 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 balanceBeatsPerHour using the field table and calculation rules, then run the tool.
- Read beatsPerImpulse, impulsesPerHour, impulsesPerFullOscillation. 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 |
|---|---|---|---|
| balanceBeatsPerHour | Balance beats per hour | integer; minimum: 2 | Required |
Enter an even safe integer beats/hour≥2. Return hourly impulses, two beats per impulse and one impulse per full oscillation.
impulsesPerHour=beatsPerHour/2 Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| beatsPerImpulse | Beats per impulse | integer; minimum: 2; maximum: 2 |
| impulsesPerHour | Impulses per hour | number; minimum: 1 |
| impulsesPerFullOscillation | Impulses per full oscillation | integer; minimum: 1; maximum: 1 |
{
"input": {
"balanceBeatsPerHour": 18000
},
"output": {
"beatsPerImpulse": 2,
"impulsesPerHour": 9000,
"impulsesPerFullOscillation": 1
}
}Limitations and assumptions
No movement is observed or torque and accuracy inferred.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Escapement Impulse Rate: Compare detent, duplex, and natural-escapement impulse rates from the balance beat rate without conflating beat and full oscillation. For a complementary task, use Four Five Hertz High Beat Comparison Lookup: Return explicit 4 Hz and 5 Hz frequencies plus Grand Seiko's power-reserve, longevity, accuracy, and high-beat terminology cautions.
References
-
Detent Escapement Impulse Rate — tool.io
Similar or alternative tools
- Escapement Impulse Rate
Compare detent, duplex, and natural-escapement impulse rates from the balance beat rate without conflating beat and full oscillation.
- Four Five Hertz High Beat Comparison Lookup
Return explicit 4 Hz and 5 Hz frequencies plus Grand Seiko's power-reserve, longevity, accuracy, and high-beat terminology cautions.