US3801803A
Expired / Lapsed
US
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Electronic conversion system
Assignee: Bendix Corp
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Filing: 1972-10-11
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Granted: 1974-04-02
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Expires: 1992-10-11
Abstract
Abstract Apparatus for converting displacement command pulses in an N/C system from Metric to English systems of measurement. The apparatus is entirely external to the N/C machine and employs relatively simple arithmetic units to effect the multiplication of both positive and negative displacement pulse quantities by a fractional conversion factor.
Inventors
- 👤 G Mcdaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:56
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/408; G05B19/4086; G06; G06F; G06F7/00; G06F7/60; G06F7/68; G05B2219/00; G05B2219/30; G05B2219/35; G05B2219/35556
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
199 words
Apparatus for use in a numerical control system for converting displacement control signals in one system of measurement to displacement control signals in another system of measurement comprising: input means for producing a first quantity of displacement command pulses representing a quantity of displacement in said one system of measurement; converter means connected to receive said first quantity of pulses and responsive thereto to produce a second quantity of displacement command pulses representing the same quantity of displacement but in another system of measurement; said first and second quantities being related by a predetermined conversion factor equal to a predetermined fraction having a numerator and a denominator; and output means connected to receive said second quantity of signals and to apply said quantity to a displacement control system; said converter means including pulse quantity storage means, first arithmetic means connected to said input means and said storage means for adding a third quantity in said storage means representing said numerator for each pulse in said first quantity, and second arithmetic means connected to said storage means for subtracting a fourth quantity representing said denominator in said storage means each time the sum of said third quantities equals said denominator.
Claim 2
Dependent Claim
199 words
Apparatus for use in a numerical control system for converting displacement control signals in one system of measurement to displacement control signals in another system of measurement comprising: input means for producing a first quantity of displacement command pulses representing a quantity of displacement in said one system of measurement; converter means connected to receive said first quantity of pulses and responsive thereto to produce a second quantity of displacement command pulses representing the same quantity of displacement but in another system of measurement; said first and second quantities being related by a predetermined conversion factor equal to a predetermined fraction having a numerator and a denominator; and output means connected to receive said second quantity of signals and to apply said quantity to a displacement control system; said converter means including pulse quantity storage means, first arithmetic means connected to said input means and said storage means for adding a third quantity in said storage means representing said numerator for each pulse in said first quantity, and second arithmetic means connected to said storage means for subtracting a fourth quantity representing said denominator in said storage means each time the sum of said third quantities equals said denominator.
Claim 3
Dependent Claim
29 words
Apparatus as defined in claim 1 wherein said converter means includes comparator means for storing a fifth quantity representing said denominator, said pulse quantity storage means being connected thereto.
Claim 4
Dependent Claim
28 words
Apparatus as defined in claim 1 wherein said conversion factor is 50/127 whereby said first system of measurement is Metric and said second system of measurement is English.
Claim 5
Dependent Claim
39 words
Apparatus as defined in claim 1 including sign control means for selectively controlling the positive and negative arithmetic effects of said addition and subtraction quantities according to the direction of displacement to be followed by said displacement control system.
References Cited (Backward Citations)
GB1240882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |