GB618169A - Improvements in or relating to means for gauging linear dimensions - Google Patents

Improvements in or relating to means for gauging linear dimensions

Info

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
Application number
GB3218646A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HERBERT BRUCE WILLIAM HOLT
P A M Ltd
Original Assignee
HERBERT BRUCE WILLIAM HOLT
P A M Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HERBERT BRUCE WILLIAM HOLT, P A M Ltd filed Critical HERBERT BRUCE WILLIAM HOLT
Priority to GB3218646A priority Critical patent/GB618169A/en
Publication of GB618169A publication Critical patent/GB618169A/en
Expired legal-status Critical Current

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)
  • Adjustable Resistors (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (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.
GB3218646A 1946-10-30 1946-10-30 Improvements in or relating to means for gauging linear dimensions Expired GB618169A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

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