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US3914869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centering device
Assignee: Individual
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Filing: 1974-07-12
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Granted: 1975-10-28
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Expires: 1994-07-12
Abstract
Abstract Centering device for use with the spindle of a machine tool. There is provided a centering device for application to the spindle of a machine tool in which the feeler of the centering device is pivotal through a plane substantially radial of such spindle, and the deflections resulting from inaccuracies in the shaft or hole being examined are transmitted to an indicator. In the invention, the measuring range and accuracy of the device are increased by spacing the axis of the feeler radially and fixedly from the projected axis of such spindle. Other features include the transmission of forces through perpendicularly positioned rollers fixed respectively into adjacent levers. A further feature includes a locking device comprising a pin projecting into an opening in one of said levers with an enlargement of said openings surrounding said pin when same is in its inactive position to avoid damage thereto by excessive movement of the feeler and resulting movement of the lever. Other advantageous features are developed in detail in the following specification.
Inventors
- 👤 Herbert Merz
- 👤 Willi Standke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:08
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/24; G01B5/25; G01B7/00; G01B7/004; G01B7/008; G01B7/012; B; B23; B23Q; B23Q17/00; B23Q17/22; B23Q17/2233; G01B7/30; G01B7/31; G01B7/312; B23Q2017/001; G01B3/00; G01B3/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A centering device engageable with the spindle of a machine tool, comprising: a measuring device and actuating means therefor, said actuating means including a substantially radially swingable feeler having a swing axis and means transferring the deflections of said swingable feeler to said measuring device, said actuating means further including locating means carried on said transfer means for defining the central position of said feeler, transfer means and measuring device; said centering device further comprising means fixedly positioning the swing axis of the feeler at a constant distance from the spindle axis; and manually operable means engageable with said locating means for bringing the feeler and transfer means and measuring device into said central position and for locking the transfer means and measuring device there.
Claim 2
Dependent Claim
125 words
A centering device engageable with the spindle of a machine tool, comprising: a measuring device and actuating means therefor, said actuating means including a substantially radially swingable feeler having a swing axis and means transferring the deflections of said swingable feeler to said measuring device, said actuating means further including locating means carried on said transfer means for defining the central position of said feeler, transfer means and measuring device; said centering device further comprising means fixedly positioning the swing axis of the feeler at a constant distance from the spindle axis; and manually operable means engageable with said locating means for bringing the feeler and transfer means and measuring device into said central position and for locking the transfer means and measuring device there.
Claim 3
Dependent Claim
84 words
A centering device according to claim 1 in which said locating means comprises a bore on one swingable portion of said actuating means and having an entry cone, said manually operable means including a locating pin urgeable from outside the centering device into said bore, and a spring resiliently oppositely urging said locating pin to a rest position outside said bore, said bore further being approximately perpendicular to the swinging movement of said swingable portion of said actuating means on which it is located.
Claim 4
Dependent Claim
46 words
A centering device according to claim 2 in which said entry cone comprises an enlarged bore concentric with the first mentioned bore, the locating pin in its rest position projecting into said enlarged bore with a clearance, said clearance setting the limits of permissible feeler swing.
Claim 5
Dependent Claim
51 words
A centering device according to claim 1 in which said measuring device includes spring means biasing said actuating means in one direction and including additional spring means engageable with said transferring means for biasing the latter in the opposite direction to that urged by said spring means of the measuring device.
Claim 6
Dependent Claim
16 words
A centering device according to claim 4 including means operable for inactivating said additional spring means.
Claim 7
Dependent Claim
38 words
A centering device according to claim 2 in which Said transferring means comprises a pair of engageable and pivoted single-arm levers serially connecting said feeler with said measuring device, the feeler-connected one of said levers carrying said bore.
Claim 8
Dependent Claim
103 words
A centering device according to claim 2 in which said measuring device includes spring means biasing said actuating means in one direction and including additional spring means engageable with said transferring means biasing it in the opposite direction to that urged by said spring means of the measuring device and means operable for inactivating said additional spring means, said locating pin being rotatable, said means for inactivating said additional spring means including a cam on said locating pin adjacent said additional spring means and rotatable with said locating pin for engaging said additional spring means and lifting same away from said transferring means.
Claim 9
Dependent Claim
134 words
A centering device engageable with the spindle of a machine tool, comprising: a measuring device having a sensor; a substantially radially swingable feeler having a swing axis; transfer means for transmitting therethrough the deflections of said swingable feeler to said sensor of said measuring device, said transfer means comprising single-arm engaging levers pivotally carried on said centering device; means fixedly locating said swing axis of said feeler at a constant distance from the spindle axis, said levers comprising a pair of levers carried on parallel pivot axes and a point of contact therebetween, and including, at said contact point of said levers, hardened contacting rollers each inserted into a corresponding one of the levers, one said roller being parallel to one lever axis and the other said roller being perpendicular to said one roller.
Claim 10
Dependent Claim
134 words
A centering device engageable with the spindle of a machine tool, comprising: a measuring device having a sensor; a substantially radially swingable feeler having a swing axis; transfer means for transmitting therethrough the deflections of said swingable feeler to said sensor of said measuring device, said transfer means comprising single-arm engaging levers pivotally carried on said centering device; means fixedly locating said swing axis of said feeler at a constant distance from the spindle axis, said levers comprising a pair of levers carried on parallel pivot axes and a point of contact therebetween, and including, at said contact point of said levers, hardened contacting rollers each inserted into a corresponding one of the levers, one said roller being parallel to one lever axis and the other said roller being perpendicular to said one roller.
Claim 11
Dependent Claim
34 words
A centering device according to claim 8 in which, in the central pivoted position of the levers, said contact point lies in the plane common to the pivot axes of said pair of levers.
References Cited (Backward Citations)
US3102343A
Cited
US3601897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |