US3755909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide range dimension measuring apparatus
Assignee: Toyoda Koki KK
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Filing: 1971-06-21
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Granted: 1973-09-04
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Expires: 1991-06-21
Abstract
Abstract Wide range dimension measuring apparatus comprising a measuring head movable toward and away from an object to be measured. A movable block is mounted on the measuring head to be movable relative thereto, a first measuring member is secured to one side of the movable block, a slidable member slidably received in the movable block, and a second measuring member is secured to the slidable member on the same side as the first measuring member so as to embrace the object between the first and second measuring members. A displacement detector is positioned to measure the relative displacement between the slidable member and the movable block for producing an electric signal. A first balancing weight means is provided for supporting the force of gravity or weight acting on the movable block, and a second balancing weight means is provided for supporting the force of gravity or weight acting on the slidable member.
Inventors
- 👤 H Asano
- 👤 I Ohtsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:53
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/12; G01B3/00; G01B3/002; G01B3/008
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
136 words
Wide range dimension measuring apparatus comprising a measuring head movable toward and away from an object to be measured, a movable block mounted on said measuring head to be movable relative thereto, a first measuring member secured to one side of said movable block, a slidable member slidably received in said movable block, a second measuring member secured to said slidable member on the same side as said first measuring member so as to embrace said object between said first and second measuring members, a displacement detector to measure the relative displacement between said slidable member and said movable block for producing an electric signal, first balancing weight means for supporting the force of gravity acting upon said movable block, and second balancing weight means for supporting the force of gravity acting upon said slidable member.
Claim 2
Dependent Claim
136 words
Wide range dimension measuring apparatus comprising a measuring head movable toward and away from an object to be measured, a movable block mounted on said measuring head to be movable relative thereto, a first measuring member secured to one side of said movable block, a slidable member slidably received in said movable block, a second measuring member secured to said slidable member on the same side as said first measuring member so as to embrace said object between said first and second measuring members, a displacement detector to measure the relative displacement between said slidable member and said movable block for producing an electric signal, first balancing weight means for supporting the force of gravity acting upon said movable block, and second balancing weight means for supporting the force of gravity acting upon said slidable member.
Claim 3
Dependent Claim
61 words
The measuring apparatus according to claim 1 wherein said measuring head is in the form of a letter C with two jaws, said movable block is slidably mounted on a supporting rod supported between said jaws, and a fluid pressure chamber is defined between said movable block and said supporting rod to support said movable block relative to said supporting rod.
Claim 4
Dependent Claim
39 words
The measuring apparatus according to claim 1 wherein said first balancing weight is provided for said measuring head on the side thereof opposite said measuring members and is connected to said movable block by means of flexible cable means.
Claim 5
Dependent Claim
23 words
The measuring apparatus according to claim 1 wherein said first balancing weight means comprises a plurality of balancing weight elements of different weight.
Claim 6
Dependent Claim
67 words
The measuring apparatus according to claim 2 wherein the weight W1 of said first balancing weight means is selected to satisfy a relation W1 (B1 - f1) - F wherein B1 represents the force of gravity acting on said movable block, F the supporting force provided by the pressurized fluid introduced into said fluid pressure chamber and f1 the contact pressure imparted to said first measuring member.
Claim 7
Dependent Claim
66 words
The measuring apparatus according to claim 1 wherein said movable block is formed with a through hole, said slidable member comprises a slidable rod being loosely received in said through hole, and said second measuring member is secured to the outer end of said slidable rod, said slidable rod being supported in said through hole by guide bushings on the opposite ends of said through hole.
Claim 8
Dependent Claim
29 words
The measuring apparatus according to claim 1 wherein said movable block formed with a cylinder and a piston is contained in said cylinder for actuating said second measuring member.
Claim 9
Dependent Claim
23 words
The measuring apparatus according to claim 6 wherein said slidable rod is connected to said second balancing weight means through flexible cable means.
Claim 10
Dependent Claim
23 words
The measuring apparatus according to claim 1 wherein said second balancing weight means comprises a plurality of balancing weight elements of different weight.
Claim 11
Dependent Claim
48 words
The measuring apparatus according to claim 6 wherein the weight W2 of said second balancing weight means is selected to satisfy a relation W2 B2 + f2 where B2 represents the gravity acting upon said slidable rod and f2 the contact pressure imparted to said second measuring member.
Claim 12
Dependent Claim
36 words
The measuring apparatus according to claim 1 wherein a pilot bar is connected to said movable block and said pilot bar is slidably supported by said measuring head whereby to privent said movable block from rotating.
Claim 13
Dependent Claim
40 words
The measuring apparatus according to claim 11 wherein a fluid pressure cylinder is provided for said measuring head beneath said pilot bar and a piston is contained in said cylinder to engage said pilot bar for moving said movable block.
Claim 14
Dependent Claim
67 words
The measuring apparatus according to claim 6 wherein the upper end of said slidable rod is connected to a pilot bar through a connecting arm, said pilot bar being slidably received in said movable block for guiding the movement of said slidable bar with respect to said movable block, and a reference signal generator is adjustably mounted on said movable block to cooperate with said pilot bar.
Claim 15
Dependent Claim
16 words
The measuring apparatus according to claim 13 wherein said reference signal generator comprises a differential transformer.
Claim 16
Dependent Claim
35 words
The measuring apparatus according to claim 13 wherein said displacement detector comprises a pair of cooperating elements, one of said elements being connected to said connecting arm and the other supported by said movable block.
Claim 17
Dependent Claim
28 words
The measuring apparatus according to claim 15 wherein said one element of said displacement detector comprises a magnetic standard scale and the other element comprises an electric coil.
Claim 18
Dependent Claim
27 words
The measuring apparatus according to claim 2 wherein means is provided to constantly admit fluid under pressure into said fluid pressure chamber for operating said movable block.
Claim 19
Dependent Claim
25 words
The measuring apparatus according to claim 7 which further comprises a transfer valve for admitting and discharging fluid under pressure to and from said cylinder.
Claim 20
Dependent Claim
28 words
The measuring apparatus according to claim 12 wherein a transfer valve is provided for admitting and discharging of fluid under pressure to and from said fluid pressure cylinder.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |