US3748962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hob shifter
Assignee: Schneider Electric Buildings Americas Inc
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Filing: 1971-12-16
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Granted: 1973-07-31
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Expires: 1991-12-16
Abstract
Abstract Signal pulses are produced and counted in response to axial shifting of the hob and are used to effect stopping of the hob when the latter has moved through a commanded distance.
Inventors
- 👤 T Hilkert
- 👤 G Fransson
- 👤 R Trenbeath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:52
CPC Classifications
B; B23; B23F; B23F5/00; B23F5/20; B23F5/22; B23F23/00; B23F23/12; B23F23/1237; B23F23/1243; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/101431; Y10T409/10159; Y10T409/102067
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
In a hobbing machine, the combination of, a support, a rotatable hob, a slide mounting said hob on said support for axial shifting, drive mechanism for moving said slide to shift said hob axially, first means for digitally signaling a first numerical value representing a desired displacement of said slide, second means for enabling said drive mechanism to initiate movement of said slide, third means for producing a signal pulse in response to movement of the slide through a predetermined incremental unit distance, fourth means for counting said pulses and digitally signaling a second numerical value which changes in proportion to the number of pulses produced and in proportion to the actual distance traveled by said slide, and fifth means responsive to said first and fourth means for disabling said drive mechanism and terminating movement of said slide when said actual distance becomes equal to said desired displacement.
Claim 2
Dependent Claim
148 words
In a hobbing machine, the combination of, a support, a rotatable hob, a slide mounting said hob on said support for axial shifting, drive mechanism for moving said slide to shift said hob axially, first means for digitally signaling a first numerical value representing a desired displacement of said slide, second means for enabling said drive mechanism to initiate movement of said slide, third means for producing a signal pulse in response to movement of the slide through a predetermined incremental unit distance, fourth means for counting said pulses and digitally signaling a second numerical value which changes in proportion to the number of pulses produced and in proportion to the actual distance traveled by said slide, and fifth means responsive to said first and fourth means for disabling said drive mechanism and terminating movement of said slide when said actual distance becomes equal to said desired displacement.
Claim 3
Dependent Claim
42 words
A hobbing machine as defined in claim 1 in which said second numerical value increases in proportion to the number of pulses produced, said fifth means terminating movement of said slide when said second numerical value coincides with said first numerical value.
Claim 4
Dependent Claim
62 words
A hobbing machine as defined in claim 1 in which said drive mechanism comprises a rotatable shaft operably connected to said slide to shift the latter, said first means comprising a toothed wheel fast on and rotatable with said shaft, and a proximity detector positioned adjacent said wheel and operable to produce signal pulses as an incident to rotation of said wheel.
Claim 5
Dependent Claim
46 words
A hobbing machine as defined in claim 1 further including means responsive to said second and fifth means for producing a visula signal which begins at the time movement of said slide is initiated and which ends at the time moVement of said slide is terminated.
Claim 6
Dependent Claim
49 words
A hobbing machine as defined in claim 1 further including means for disabling said drive mechanism and stopping said slide when the latter reaches a predetermined position on said support regardless of whether said actual distance has become equal to said desired displacement when the slide reaches such position.
Claim 7
Dependent Claim
30 words
A hobbing machine as defined in claim 5 further including means responsive to said last-mentioned means for disabling automatic cycling of the machine when said slide reaches said predetermined position.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |