US4138823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Probe for use in measuring apparatus
Assignee: Rolls Royce PLC
•
Filing: 1978-01-10
•
Granted: 1979-02-13
•
Expires: 1998-01-10
Abstract
Abstract A probe for use in measuring machines comprises a stylus holder tiltably supported on three first seats arranged about an axis and on one side of an intermediate member. The intermediate member is tiltably supported at its other side on three second seats provided on a housing on the same pitch circle as the first seats but intermediate between the first seats. The stylus holder is therefore supported with the stability inherent in a three-point support but is tiltable about any two adjacent ones of six seats thereby improving the sensitivity of the probes.
Inventors
- 👤 David R. McMurtry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:16
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/004; G01B7/008; G01B7/012
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
A probe for use in measuring apparatus comprising a first, a second and a third member, at least three first seats on the second member at one side thereof and spaced symmetrically around an axis, the first member confronting said first seats, second seats on the third member in positions spaced symmetrically around said axis and such that there is one second seat situated angularly between each adjacent two first seats, another side of said second member facing in a direction opposite to said one side and confronting said second seats, spring means for biasing the first member into engagement with said first seats and for biasing the second member into engagement with said second seats, said first member constituting a holder for a stylus and being tiltable in opposition to said spring means about any adjacent two of said first seats and, through the intermediary of said second member, about any adjacent two of said second seats.
Claim 2
Dependent Claim
158 words
A probe for use in measuring apparatus comprising a first, a second and a third member, at least three first seats on the second member at one side thereof and spaced symmetrically around an axis, the first member confronting said first seats, second seats on the third member in positions spaced symmetrically around said axis and such that there is one second seat situated angularly between each adjacent two first seats, another side of said second member facing in a direction opposite to said one side and confronting said second seats, spring means for biasing the first member into engagement with said first seats and for biasing the second member into engagement with said second seats, said first member constituting a holder for a stylus and being tiltable in opposition to said spring means about any adjacent two of said first seats and, through the intermediary of said second member, about any adjacent two of said second seats.
Claim 3
Dependent Claim
26 words
Probe according to claim 1, wherein the number of said first seats is three and said second seats are positioned angularly medially between said second seats.
Claim 4
Dependent Claim
54 words
Probe according to claim 1 wherein said second and third members are ring-shaped and define respective openings, the first member being situated at the side of the second member remote from the third member and having an extension extending through said openings, and the extension having means for the attachment thereto of a stylus.
Claim 5
Dependent Claim
73 words
Probe according to claim 1 wherein said second member comprises a ring having an annular array of apertures, support elements of circular cross-section are secured to the ring in said apertures and each have portions projecting from opposite axial sides of the ring, the projecting portions at one side of the ring defining said first seats, and the projecting portions at the other side of the ring being engageable with said second seats.
Claim 6
Dependent Claim
41 words
Probe according to claim 4, wherein said circular section elements are situated in equispaced relationship on a common pitch circle, said ring is of undulating shape defining alternately inclined portions, and said apertures and elements are situated in said inclined portions.
Claim 7
Dependent Claim
51 words
Probe according to claim 1, comprising pairs of convergent surfaces on one of the first and second members and complementary surfaces on the other one of said first and second members and engageable between the convergent surfaces of respective said pairs, said surfaces on the second member constituting said first seats.
Claim 8
Dependent Claim
52 words
Probe according to claim 1, comprising pairs of convergent surfaces on one of the second and third members, and complementary surfaces on the other one of the second and third members and engageable between the convergent surfaces of respective said pairs, and said surfaces on the third member constituting said second seats.
Claim 9
Dependent Claim
53 words
Probe according to claim 1, said first member constituting electrical contacts with said seats of said second member, said second member constituting electrical contacts with said seats of said third member, and the probe comprising electrical circuit means connected to said contacts to change state when any one of said contacts is broken.
References Cited (Backward Citations)
US3122970A
Cited
DE1184972B
Cited
US3250012A
Cited
US3362076A
Cited
US3766653A
Cited
GB1445977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |