US3764781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for interchanging measurement systems
Assignee: BRIDGEPORT MACHINES Inc A CORP OF
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Filing: 1972-07-10
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Granted: 1973-10-09
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Expires: 1992-07-10
Abstract
Abstract The output from a control means providing pulses representative of English system units is applied to a countermeans, which, as it counts the input pulses applies the count as an output to a memory means. The memory means contains storage locations corresponding to permissible counts of counter to provide a pattern of predetermined fixed relationship between the English and Metric system, such that for each input count a predetermined output in terms of Metric measurement is provided. The memory system also provides means for adjusting the count in the counter and specifically, depending upon the direction of counting, readjusts the counter to zero upon completion of a predetermined number of steps in a repeatable pattern and when counting down skips the counter to the last predetermined count of a finite number of steps in said pattern.
Inventors
- 👤 M Kreithen
- 👤 J Lawler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:07
CPC Classifications
H; H03; H03M; H03M7/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
174 words
An English/Metric dimensional converter for converting an input to a control means in terms of one of said systems of measurement to a machine tool drive operating in and responding to the other system of measurement comprising: counter means for receiving as an input the output of the control means in terms of said one measurement system and accumulating data representing position determined by the control means; and memory means containing a fixed finite number of instructions representative of the number of steps in a repeatable pattern relationship between the two measurement systems in storage locations corresponding to permissible counts of the counter means, addressed by the output of the counter means, storing a predetermined fixed relationship between the one measurement system to the other in each storage location providing an output in terms of the other system of measurement, said memory means also containing instructions in particular storage locations, dependent upon the number of step in the repeatable pattern, to provide feedback to the counter means causing the counter to skip meaningless positions.
Claim 2
Dependent Claim
174 words
An English/Metric dimensional converter for converting an input to a control means in terms of one of said systems of measurement to a machine tool drive operating in and responding to the other system of measurement comprising: counter means for receiving as an input the output of the control means in terms of said one measurement system and accumulating data representing position determined by the control means; and memory means containing a fixed finite number of instructions representative of the number of steps in a repeatable pattern relationship between the two measurement systems in storage locations corresponding to permissible counts of the counter means, addressed by the output of the counter means, storing a predetermined fixed relationship between the one measurement system to the other in each storage location providing an output in terms of the other system of measurement, said memory means also containing instructions in particular storage locations, dependent upon the number of step in the repeatable pattern, to provide feedback to the counter means causing the counter to skip meaningless positions.
Claim 3
Dependent Claim
25 words
The device of claim 1 in which the direction of operation is input into the counter means to determine the output sequence of the counter.
Claim 4
Dependent Claim
52 words
The device of claim 2 in which the counter means may be set at a particular count and in which instructions in particular storage locations, dependent upon the number of steps in the repeatable pattern and direction of operation, provide feedback to the counter means causing the counter to skip meaningless positions.
Claim 5
Dependent Claim
34 words
The device of claim 3 in which the feedback to the counter means sets the counter means to zero when counting up upon the occurrence of the last of the finite number of instructions.
Claim 6
Dependent Claim
40 words
The device of claim 3 in which the feedback to the counter means sets the counter means to the last instruction of the repetative pattern when counting down upon the occurrence of the first of the finite number of instructions.
Claim 7
Dependent Claim
15 words
The device of claim 1 in which the memory means is a read only memory.
Claim 8
Dependent Claim
40 words
The device of claim 1 in which switching means is provided to connect through said device in order to enable operation in the second system of measurement or to bypass said device to operate in the first system of measurement.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |