GB618169A - Improvements in or relating to means for gauging linear dimensions - Google Patents
Improvements in or relating to means for gauging linear dimensionsInfo
- Publication number
- GB618169A GB618169A GB3218646A GB3218646A GB618169A GB 618169 A GB618169 A GB 618169A GB 3218646 A GB3218646 A GB 3218646A GB 3218646 A GB3218646 A GB 3218646A GB 618169 A GB618169 A GB 618169A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact
- valve
- plunger
- rod
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/38—Gauges with an open yoke and opposed faces, i.e. calipers, in which the internal distance between the faces is fixed, although it may be preadjustable
- G01B3/42—Gauges with an open yoke and opposed faces, i.e. calipers, in which the internal distance between the faces is fixed, although it may be preadjustable of limit-gauge type, i.e. "go/no-go"
- G01B3/44—Gauges with an open yoke and opposed faces, i.e. calipers, in which the internal distance between the faces is fixed, although it may be preadjustable of limit-gauge type, i.e. "go/no-go" preadjustable for wear or tolerance
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Adjustable Resistors (AREA)
Abstract
618,169. Gauging-apparatus. P.A.M., Ltd., and HOLT, H. B. W. Oct. 30, 1946, No. 32186. [Class 106 (ii)] A linear - dimension gauge comprises a housing carrying a movable work - engaging plunger and a contact and valve amplifying means adapted to operate an indicator when the gap between the plunger and contact is closed. The housing 4 has detachable end pieces in the' lower of which is slidably mounted the plunger 6 having a flat contact extension for cooperation with a sphericallyground contact-end 5 of a rod 15 mounted in an insulating bush. The contact-pieces are polished and plated and the rod 15 is connected by a flat spring 17 to a rod 18 also mounted in an insulating bush, a screw 22, having a dial 25 and an insulating tip 23, being provided to bow the spring and so to adjust the contact 5. The grid of a triode-diode valve V1 is normally supplied with an A.C. signal derived from a potentiometer R1, R2, which signal is amplified and rectified by the diode to produce a negative potential which is applied to the grid of a triode V2 to bias it beyond cut-off. However, when the plunger 6 engages the contact 5 in a gauging operation, the resistance R2, the ends of which are connected to the rod 18 and to the housing 4 respectively by a cable 7, is short-circuited so that the negative potential is removed from the grid of the valve V2 which then becomes conducting to cause a relay 1 in its anode circuit to close the circuit of a visual or aural indicator. On an alternative circuit (not shown, for universal valves, the valve V2 is a tetrode and the relay 1 is connected in the cathode circuit. To simplify servicing of the amplifiers, the resistances and condensers, the relay and, if used, the transformer and the metal rectifier may be built into sealed boxes adapted to plug into valve-holders secured to the chassis.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3218646A GB618169A (en) | 1946-10-30 | 1946-10-30 | Improvements in or relating to means for gauging linear dimensions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3218646A GB618169A (en) | 1946-10-30 | 1946-10-30 | Improvements in or relating to means for gauging linear dimensions |
Publications (1)
Publication Number | Publication Date |
---|---|
GB618169A true GB618169A (en) | 1949-02-17 |
Family
ID=10334620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3218646A Expired GB618169A (en) | 1946-10-30 | 1946-10-30 | Improvements in or relating to means for gauging linear dimensions |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB618169A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE941870C (en) * | 1954-10-09 | 1956-04-19 | Leitz Ernst Gmbh | Electronic switch for tolerance measuring devices |
-
1946
- 1946-10-30 GB GB3218646A patent/GB618169A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE941870C (en) * | 1954-10-09 | 1956-04-19 | Leitz Ernst Gmbh | Electronic switch for tolerance measuring devices |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2982887A (en) | Combined amplitude comparator and indicator | |
GB618169A (en) | Improvements in or relating to means for gauging linear dimensions | |
FR2342419A1 (en) | Compressed air cylinder piston position detector - has proximity switch fitted into each end cap to give contactless signal | |
GB1163530A (en) | Electron beam generating apparatus | |
GB629357A (en) | Direct coupled thermionic valve amplifier | |
GB611333A (en) | Vacuum tube voltmeter | |
GB382502A (en) | Improvements in or relating to electric spring contacts | |
GB653500A (en) | Improvements in or relating to gauging apparatus | |
GB696328A (en) | Improvements in or relating to electronic apparatus | |
GB411410A (en) | Attachment of fixed contacts to terminals in electrical apparatus | |
GB593574A (en) | Improvements in or relating to mechanical presses | |
GB370721A (en) | Improvements in and relating to electric switches with dashpot retardation | |
GB571221A (en) | An improvement in or relating to linear-dimension gauges | |
GB622962A (en) | Improvements in or relating to circuits for operating detecting and/or locating devices | |
GB469174A (en) | Improvements in mercury switches | |
GB807316A (en) | Improvements in or relating to attachments for use with dial indicators | |
GB629478A (en) | Improvements relating to electrical measuring equipment | |
GB456322A (en) | Improvements in and relating to book rests | |
GB609858A (en) | Improvements in or relating to electronic amplifying systems | |
GB629788A (en) | Improvements in or relating to electrical brush gear | |
GB601877A (en) | Electric bridge circuits for measuring resistances | |
GB609541A (en) | Improvements in or relating to low-frequency amplifying circuits | |
GB678689A (en) | Improvements in or relating to neutralized high-frequency push-pull amplifiers | |
GB520143A (en) | Improvements relating to fluid pressure indicators or like apparatus | |
GB669504A (en) | Improvements in or relating to aerials |