GB2322448A - Electro-mechanical comparator - Google Patents
Electro-mechanical comparator Download PDFInfo
- Publication number
- GB2322448A GB2322448A GB9703819A GB9703819A GB2322448A GB 2322448 A GB2322448 A GB 2322448A GB 9703819 A GB9703819 A GB 9703819A GB 9703819 A GB9703819 A GB 9703819A GB 2322448 A GB2322448 A GB 2322448A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electro
- mechanical
- comparator
- caliper
- mechanical comparator
- 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.)
- Withdrawn
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
- G01B3/16—Compasses, i.e. with a pair of pivoted arms
- G01B3/166—Compasses, i.e. with a pair of pivoted arms provided with a measuring scale
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Toys (AREA)
Abstract
An electro-mechanical comparator in which the caliper arms 7 are operated by rotation of a knob 4 to enable the caliper points 8 to give an almost instantaneous visual indication of the distance between two closely situated objects, which distance is also indicated by a reading on an electronic meter scale 3. The caliper arms 7 are fixed by means of a locking device 6 when required, so as to permit an accurate reading on the meter 2 to be taken, which may then be compared using the same procedure as given above with the distance between two further objects. The meter readings allow comparisons of distances only, for use in the game of bowls, are not meant to provide absolute values of the distances involved. The caliper arms 7 may be unscrewed at 14 to permit stowage and easier portability.
Description
Electro-Mechanical Comparator
This invention relates to a rotary lever, spring controlled, electro-mechanical comparator, for small to medium linear distances.
Comparison of small to medium distances in mechanical engineering are normally carried out employing mechanical calipers adjusted by means of some form of thumbscrew and controlled by a spring located at the ends of two caliper arms.
Adjustment ofthis type of caliper for comparing the size of items or distances between points in the small to medium range by this method is slow involving a trial and error technique. Some calipers of this type are often quite large considering the small distances they are required to compare.
The electro-mechanical comparator is meant for usage in the game of indoor and outdoor lawn bowls.
According to the present invention named in the heading above there is provided a hand held, pocket sized, electro-mechanical comparator, comprising lever operated, spring controlled, caliper arms integrated with an electronic circuit for registering the movement of the caliper arms. An electronic meter with scale is provided to register any movement of the caliper arms, the latter being capable of being locked in position so allowing the scale reading to be fixed and noted.
Both electronic meter scale and rotatable knob are suitably inscribed to indicate the directions and amounts of caliper arm movement so allowing comparisons of small to medium distances.
A rotatable knob with integral lever moves the caliper arms in order to facilitate distance comparisons whilst spring control of the caliper arms provides smooth control and return of the arms to their initial rest position.
A single cell battery is provided for powering the electronic circuitry together with a switch for turning its power on and off as required.
Provision is made to safeguard the electronic circuitry in the event of incorrect battery installation.
With reference to the accompanying drawings:
Figure 1 shows in perspective the electro-mechanical comparator with all its major
components in position within their containing case.
Figure 2 depicts the mechanical assembly of the caliper arms and controlling spring
together with the integrated operating knob and lever. Also shown is the mechanical
spindle connecting caliper arm movement to the electronic circuitry.
Figure 3 is the schematic circuit diagram illustrating the connection of all the electronic
circuit components.
Referring to Fig. 1 the electro-mechanical comparator comprises the case 1 containing the electronic meter 2 with its graduated scale 3. Movement of the caliper arms 7 and caliper points 8 are affected by means of rotating knob 4 with its integral lever 5. The locking device 6 enables the knob 4 and thus the caliper arms 7 to be locked in position when required.
In Fig. 2 spring 11 controls movement of the caliper arms 7 about pivot 13 whilst mechanical movement of the arms 7 is indicated to the electronic circuitry of Fig. 3 by means of the mechanical coupling spindle 12. The caliper arms 7 can be unscrewed at 14 and placed at the rear of case 1 when portability and stowage is desired.
In Fig. 3 the electronic circuitry is powered by battery 10 whose power is switched on and off by switch 9. Diode 15 and resistor 16 provide electronic safety features.
Claims (8)
1. A battery powered electro-mechanical comparator comprising all the following items. A rotary knob and integral lever which actuates spring controlled, manually lockable caliper arms, whilst at the same time causing an associated, coupled, electronic circuit to indicate on an electronic meter the extent of any movement of the caliper arms.
2. An electro-mechanical comparator as claimed in Claim 1 wherein both mechanical visual, and electro-mechanical visual functions, enable the comparison of small to medium linear distances.
3. An electro-mechanical comparator as claimed in Claim 1 wherein a rotary operating lever causes movement of at least one arm of a caliper assembly.
4. An electro-mechanical comparator wherein the rotary operating lever as claimed in Claim 1 or Claim 3 adjusts the current in the associated electronic circuit.
5. An electro-mechanical comparator wherein the electronic circuit claimed in Claim 1 or Claim 4 registers on the electronic meter in Claim 1 the mechanical movement of the caliper in Claim 1 or Claim 3.
6. An electro-mechanical comparator wherein means 15 provided to lock the position when required of the caliper assembly claimed in Claim 1 or Claim 3 or Claim 5.
7. An electro-mechanical comparator as claimed in Claim 1 wherein its electronic operation is not critically affected by its battery condition over the normal lifetime of such battery.
8. An electro-mechanical comparator as claimed in Claim 1 which may in the event of its battery failure for any reason, continue to be used on a purely manual basis.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9703819A GB2322448A (en) | 1997-02-24 | 1997-02-24 | Electro-mechanical comparator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9703819A GB2322448A (en) | 1997-02-24 | 1997-02-24 | Electro-mechanical comparator |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9703819D0 GB9703819D0 (en) | 1997-04-16 |
GB2322448A true GB2322448A (en) | 1998-08-26 |
Family
ID=10808217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9703819A Withdrawn GB2322448A (en) | 1997-02-24 | 1997-02-24 | Electro-mechanical comparator |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2322448A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2329710A (en) * | 1997-09-25 | 1999-03-31 | David Jardine | Comparator for use in the game of bowls |
GB2362214A (en) * | 2000-05-09 | 2001-11-14 | Norman Francis Ambrose Lees | Bowls measure |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB755989A (en) * | 1954-02-26 | 1956-08-29 | Stephen Silvester Lancefield | Improvements in callipers |
GB2107046A (en) * | 1981-09-08 | 1983-04-20 | Kroplin Gmbh H C | Calliper gauge |
US4468860A (en) * | 1982-03-08 | 1984-09-04 | Rodengen Jeffrey L | Measuring device |
GB2265008A (en) * | 1992-02-25 | 1993-09-15 | Robert Edward Best | Measuring calliper |
-
1997
- 1997-02-24 GB GB9703819A patent/GB2322448A/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB755989A (en) * | 1954-02-26 | 1956-08-29 | Stephen Silvester Lancefield | Improvements in callipers |
GB2107046A (en) * | 1981-09-08 | 1983-04-20 | Kroplin Gmbh H C | Calliper gauge |
US4468860A (en) * | 1982-03-08 | 1984-09-04 | Rodengen Jeffrey L | Measuring device |
GB2265008A (en) * | 1992-02-25 | 1993-09-15 | Robert Edward Best | Measuring calliper |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2329710A (en) * | 1997-09-25 | 1999-03-31 | David Jardine | Comparator for use in the game of bowls |
GB2329710B (en) * | 1997-09-25 | 2001-01-24 | David Jardine | Improvements in or relating to comparators |
GB2362214A (en) * | 2000-05-09 | 2001-11-14 | Norman Francis Ambrose Lees | Bowls measure |
Also Published As
Publication number | Publication date |
---|---|
GB9703819D0 (en) | 1997-04-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |