CA1279476C - Brake drum measuring apparatus - Google Patents
Brake drum measuring apparatusInfo
- Publication number
- CA1279476C CA1279476C CA000536322A CA536322A CA1279476C CA 1279476 C CA1279476 C CA 1279476C CA 000536322 A CA000536322 A CA 000536322A CA 536322 A CA536322 A CA 536322A CA 1279476 C CA1279476 C CA 1279476C
- Authority
- CA
- Canada
- Prior art keywords
- receiving bracket
- brake drum
- longitudinal cavity
- measuring scale
- pin
- 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 - Lifetime
Links
- 241000669069 Chrysomphalus aonidum Species 0.000 description 4
- RNAMYOYQYRYFQY-UHFFFAOYSA-N 2-(4,4-difluoropiperidin-1-yl)-6-methoxy-n-(1-propan-2-ylpiperidin-4-yl)-7-(3-pyrrolidin-1-ylpropoxy)quinazolin-4-amine Chemical compound N1=C(N2CCC(F)(F)CC2)N=C2C=C(OCCCN3CCCC3)C(OC)=CC2=C1NC1CCN(C(C)C)CC1 RNAMYOYQYRYFQY-UHFFFAOYSA-N 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 235000020044 madeira Nutrition 0.000 description 2
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Length-Measuring Instruments Using Mechanical Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A brake drum measuring apparatus. There is a receiving bracket having a main portion with a longitudi-nal cavity and a distal, depending portion for mounting a pin to abut against the inner circumference of a brake drum. A guage member is slidably received within the longitudinal cavity of the receiving bracket, and has a main portion with a coarse measuring scale, an actuating means for operating a fine measuring scale and a distal depending portion for mounting a pin to abut against the inner circumference of a brake drum. There is a lock for fixing the position of the guage member in the longitudi-nal cavity of the receiving bracket. A fine measuring scale is mounted on the receiving bracket and cooperates with the actuator of the guage member as the guage member slides in the longitudinal cavity. A pointer is mounted on the receiving bracket to point to the coarse measuring scale.
A brake drum measuring apparatus. There is a receiving bracket having a main portion with a longitudi-nal cavity and a distal, depending portion for mounting a pin to abut against the inner circumference of a brake drum. A guage member is slidably received within the longitudinal cavity of the receiving bracket, and has a main portion with a coarse measuring scale, an actuating means for operating a fine measuring scale and a distal depending portion for mounting a pin to abut against the inner circumference of a brake drum. There is a lock for fixing the position of the guage member in the longitudi-nal cavity of the receiving bracket. A fine measuring scale is mounted on the receiving bracket and cooperates with the actuator of the guage member as the guage member slides in the longitudinal cavity. A pointer is mounted on the receiving bracket to point to the coarse measuring scale.
Description
This invention relates to a brake drum measuring apparatus.
Periodically it is necessary to check the wear of vehicle brake drums to determine if the drums are within a prescribed tolerance range. This tolerance range, set by the manufacturer, ensures that the brake drums are still within a certain internal diameter and, secondly, either perfectly round or vary from perfectly round by a tolerable amount.
If a brake drum's internal diameter does not fall within the prescribed ranges then the drum may be machined or, if the internal diameter is too large, must be replaced.
Brake drum measuring apparatus are used to measure the internal diameters of brake drums to see whether the drums meet the manufacturer's specification.
Prior art known to applicant includes U.S.
patents 4,520,568 to Drenner; 3,827,153 to Mitchell;
3,190,006 to Madeira; 3,192,634 to Johnqon; 2,769,241 to Barrett and 3,1979874 to Fox. Of the above Drenner discloses a brake drum guage with a flat, U-shaped frame and micometer. The apparatus in Drenner depends on a reference pin and different si~es of brake shoes can be '' ' ' ' ' ' .
measured by using different lengths of reference pins and corresponding supports for that pin.
Mitchell discloses a device whose principal function is to allow the clearance between brak~ drums and shoes to be accurately set.
Madeira teaches a brake drum gauge composed of two sections that slidably engage each other.
Johnson shows a dimensional gauge for large diameters. The apparatus in Johnson includes gauging rolls inserted between the surfaces to be measured.
Barrett is a brake gauge has a coarse measuring gauge imprînted on a guide. A body 6 is slidably received on the guide and a mechanically operated micro-meter with a scale and needle is operated through a series of gears.
Fox teaches a marking gauge includes a measuring instrument with an adjustable slide bar.
or the above it is believed that Barrett is the most pertinent.
The present invention seeks to provide an accurate and convenient, lightweight apparatus to measure the internal diameter of a brake drum. It is a par-.
' ~ .
'`:
ticular feature of the present inven-tion -that the apparatus can be used while the bxake drum is in place on the vehicle and grea-tly facilitates the use of such brake measuring apparatus compared wi-th -the prior artO
Accordingly, the presen-t invention is a brake drum measuring apparatus comprising:
a receiving bracket having a rnain portion with a longitudinal cavity and a distal, depending portion for mounting a pin to abut against the inner circumference of a brake drum;
a gauge member slidably received within the longitudinal cavity of the receiving bracket, having a main portion with a coarse measuring scale, an actuating means for operating a fine measuring scale, a dis-tal depending portion for mounting a pin to abut against the inner circumference of a brake drum;
locking means for fixing the position of the gauge member in the longitudinal cavity of the receiving bracket;
fine measuring scale means mounted on said receiving bracket cooperating with said actuating means of said gauge member as the gauge member slides in the longitudinal cavity; and a pointer mounted on said receiving bracket to point to the coarse measuring scale, said distal depending portions of said receiving bracke-t and said gauge member comprising coplanar first portions extending from said main portions in an essentially vertical plane, said first portions being bent to form ' ` ':
~, ~
~ . .
coplanar second portions ex-tending out of said vertical plane, each of said second portions providing a mounting location for one of said pins, said pins defining an axis that is parallel to the longitudinal cavity of said receiving bracket.
Aspec-ts of the invention are illustrated, merely be way of example, in the accompanying drawings in which:
-3a-... .
.
79~'76 Figure 1 is an isome-tric projection o:f ~n appara-tus of the present invention;
Figure 2 is a section 2-? in Figure 1;
Figure 3 is an isometric view similar -to Fiyure 1, of a further embodiment of the inven-tion;
Figure 1 shows a prefer:red embodimen-t of the present invention suitable for measuring larger diameter brake drums without removal of the wheel. The appara-tus 10 comprises an essentially inverted U-shaped s-tructure formecl from a receiving bracket 20 and gauge member 30. ~he main portion 30 of the gauge member is slidably received within the cavity 2~ of the main portion of the receiving bracket 20. At its opposite end, gauge member 30 is bent downwardly through about 90 from the horizon-tal axes of the gauge members main portion to form descending arm 3~ whicn, in turn, is bent upwardly out of the vertical plane of the inverted U shape to form arm 33 at an angle of 135 -to the side face of descending arm 3~. Pin 42 is mounted towarcls the free end 3~ of arm 33 to abu-t against the internal circumferential surface of a brake drum.
At that end of the horizontal portion of the receiving bracket 20 opposite -the entry point for gauge member 30 is a second angle arm affixed in any suitable manner to the main portion of receiving bracket 20, ~ .
~2'7~4~
and shaped to present a mirror image o~ the angle arm formed from gauge member 30. Descending arm 1~ is bent into arm 19 with threaded hole 21 drilled through it. An adjustable pin 40 with a corresponding threaded outer circumference is threadably received in hole 21. It can be secured in place using lock nut 22. Pins 40 and 42 are coaxial with and at opposite ends of horizontal axis B-B which is in turn is parallel to horizontal axis A-A
allowing coarse scale 32 on axis A-A to be used to indi cate the distance between the ends of pins 42 and 40 on axis B-B. Receiving bracket 20 has a horizontal portion with an enlarged cross section and central cavity 24 to house gauge member 30. Receiving bracket 20 and internal cavity 24 are of sufficient length to fully accept the horizontal portion of gauge member 30. Coarse scale 32 inscribed on one surface of gauge member 30. Scale 32 is is positioned on gauge member 30 such that pointer 37, mounted to receiving bracket 20, always indicates the distance between the ends of pins 42 and 40. To obtain a more accurate measure of the distance between pins 40 and 42 than coarse scale 32 can provide, dial gauge 12 is provided to act as a vernier gauge. Dial gauge 12 comprises a housing 13 with a centrally mounted, rotating ponter 15 and circular scale 17 contained therein, beneath a transparent cover 11. Dial gauge 12 operates , :
,~, , . , .
,'' ~ , L7~
such that each time pointer 37 moves between any adjacent markings on coarse scale 32, rotating pointer 15 de-scribes one full revolution of circular scale 17 and, in doing so, rotating pointer 15, divides the distance bet-ween adjacent markings on coarse scale 32 into smaller units as indicated on circular scale 17 of dial gauge 12.
Dial gauge 12 performs its vernier scale func-tion using a rack and pinion system to drive a rotating pointer 15. Rack 34 extends the horizontal len~th of gauge member 30 with serrated inner edges 35 and 36.
Geared drive wheel 29 held in rack 34, is connected through a shaft 31 and a series of gears (not shown) to rotating pointer 15. Dial gauge 12 is mounted atop receiving bracket 20 and shaft 31 extends through an opening in receiving bracket 20 to communicate with geared drive wheel 29 in rack 34. As gauge member 30 is moved back and forth in cavity 24 of receiving bracket 20, geared drive wheel 29 rotates due to the horizontal motion of rack 34. This rotary motion is transmitted through shaft 31 and an appropriate gear system to move rotating pointer 15 an appropriate distance relative to circular scale 17 of dial gauge 12 to indicate the small horizontal distance travelled by rack 34.
Dial gauge 12 is also equipped wi~h lock button 16. When depresed this button 16 locks the dial gauge in position.
.
:
~2~
Locking screw 14 extends through the side wall of receving bracket 20 and can be used to lock gauge member 30 in place relative to receving bracket 20. By rotating the screw inwardly until gauge member 30 is clamped between the ends 23 of the locking screw 14 and the opposite wall of cavity 24, the appropriate locking is achieved.
The present invention also includes a calibra-tion bar 50 of a predetermined length between its two end tabs 51 and 52. In order to calibrate the present invet-nion, the gauge member 30 is positioned in receving bracket 20 such that pointer 37 of coarse scale 32 and rotating pointer 15 of dial gauge 12 indicates the known length of the calibration bar. Pins 40 and 42 are inserted between end tabs 51 and 52 of calibration bar 50. If necessary, adjustable pin 40 can be moved inwardly or outwardly, after loosening lock nut 22, to ensure that pins 40 and 42 span a distance equal to that indicated by the calibration of the coarse scale and dial gauge.
The first embodiment of the invention can be used while the brake drums are still in place on the vehicle. After removing the brake drum and inspection plate, the U-shape of the apparatus of the present inven-~7~
tion allows it to fit around the vehicle's axles and thedescending arms are formed so as to allow pins 40 and 42 to be inserted into the interior of the brake shoe.
Inside the brake drum pins 40 and 42 abut against the internal braking surface of the shoe. Coarse gauge 32 and dial gauge 12 in combination give an accurate measurement of the internal diameter of the brake drum.
Thus brake drum wear can be instantly deter-mined to see whether the internal diameter is still within a predetermined range fixed by the manufacturer.
If not, replacement of the brake drum is necessary.
The embodiment of Figure 3 is for use with smaller brake drums. In Figure 3, where appropriate 9 the same reference numerals are used where the item is also described in Figure 1. In the embodiment of Figure 3 descending arms 38 and 18, to which pins 40 and 42 are mounted, are mounted vertically beneath horizontal axes of gauge member 30 and receiving bracket 20.
In using the embodiment of Figure 3 of the pre-sent invention the brake drum to be inspected is first removed from the vehicle. Arms 38 and 18 are inserted into the brake drum and pins 40 and 42 brought into con-tact with the drums internal braking surface. The drum's internal diameter can be read from the coarse scale 32 .
.
' , . ' ' , ~2~
and dial gauge 12, to determine whether the drums are within manufacturer's tolerance.
' ' ' ' ' ` ' .
Periodically it is necessary to check the wear of vehicle brake drums to determine if the drums are within a prescribed tolerance range. This tolerance range, set by the manufacturer, ensures that the brake drums are still within a certain internal diameter and, secondly, either perfectly round or vary from perfectly round by a tolerable amount.
If a brake drum's internal diameter does not fall within the prescribed ranges then the drum may be machined or, if the internal diameter is too large, must be replaced.
Brake drum measuring apparatus are used to measure the internal diameters of brake drums to see whether the drums meet the manufacturer's specification.
Prior art known to applicant includes U.S.
patents 4,520,568 to Drenner; 3,827,153 to Mitchell;
3,190,006 to Madeira; 3,192,634 to Johnqon; 2,769,241 to Barrett and 3,1979874 to Fox. Of the above Drenner discloses a brake drum guage with a flat, U-shaped frame and micometer. The apparatus in Drenner depends on a reference pin and different si~es of brake shoes can be '' ' ' ' ' ' .
measured by using different lengths of reference pins and corresponding supports for that pin.
Mitchell discloses a device whose principal function is to allow the clearance between brak~ drums and shoes to be accurately set.
Madeira teaches a brake drum gauge composed of two sections that slidably engage each other.
Johnson shows a dimensional gauge for large diameters. The apparatus in Johnson includes gauging rolls inserted between the surfaces to be measured.
Barrett is a brake gauge has a coarse measuring gauge imprînted on a guide. A body 6 is slidably received on the guide and a mechanically operated micro-meter with a scale and needle is operated through a series of gears.
Fox teaches a marking gauge includes a measuring instrument with an adjustable slide bar.
or the above it is believed that Barrett is the most pertinent.
The present invention seeks to provide an accurate and convenient, lightweight apparatus to measure the internal diameter of a brake drum. It is a par-.
' ~ .
'`:
ticular feature of the present inven-tion -that the apparatus can be used while the bxake drum is in place on the vehicle and grea-tly facilitates the use of such brake measuring apparatus compared wi-th -the prior artO
Accordingly, the presen-t invention is a brake drum measuring apparatus comprising:
a receiving bracket having a rnain portion with a longitudinal cavity and a distal, depending portion for mounting a pin to abut against the inner circumference of a brake drum;
a gauge member slidably received within the longitudinal cavity of the receiving bracket, having a main portion with a coarse measuring scale, an actuating means for operating a fine measuring scale, a dis-tal depending portion for mounting a pin to abut against the inner circumference of a brake drum;
locking means for fixing the position of the gauge member in the longitudinal cavity of the receiving bracket;
fine measuring scale means mounted on said receiving bracket cooperating with said actuating means of said gauge member as the gauge member slides in the longitudinal cavity; and a pointer mounted on said receiving bracket to point to the coarse measuring scale, said distal depending portions of said receiving bracke-t and said gauge member comprising coplanar first portions extending from said main portions in an essentially vertical plane, said first portions being bent to form ' ` ':
~, ~
~ . .
coplanar second portions ex-tending out of said vertical plane, each of said second portions providing a mounting location for one of said pins, said pins defining an axis that is parallel to the longitudinal cavity of said receiving bracket.
Aspec-ts of the invention are illustrated, merely be way of example, in the accompanying drawings in which:
-3a-... .
.
79~'76 Figure 1 is an isome-tric projection o:f ~n appara-tus of the present invention;
Figure 2 is a section 2-? in Figure 1;
Figure 3 is an isometric view similar -to Fiyure 1, of a further embodiment of the inven-tion;
Figure 1 shows a prefer:red embodimen-t of the present invention suitable for measuring larger diameter brake drums without removal of the wheel. The appara-tus 10 comprises an essentially inverted U-shaped s-tructure formecl from a receiving bracket 20 and gauge member 30. ~he main portion 30 of the gauge member is slidably received within the cavity 2~ of the main portion of the receiving bracket 20. At its opposite end, gauge member 30 is bent downwardly through about 90 from the horizon-tal axes of the gauge members main portion to form descending arm 3~ whicn, in turn, is bent upwardly out of the vertical plane of the inverted U shape to form arm 33 at an angle of 135 -to the side face of descending arm 3~. Pin 42 is mounted towarcls the free end 3~ of arm 33 to abu-t against the internal circumferential surface of a brake drum.
At that end of the horizontal portion of the receiving bracket 20 opposite -the entry point for gauge member 30 is a second angle arm affixed in any suitable manner to the main portion of receiving bracket 20, ~ .
~2'7~4~
and shaped to present a mirror image o~ the angle arm formed from gauge member 30. Descending arm 1~ is bent into arm 19 with threaded hole 21 drilled through it. An adjustable pin 40 with a corresponding threaded outer circumference is threadably received in hole 21. It can be secured in place using lock nut 22. Pins 40 and 42 are coaxial with and at opposite ends of horizontal axis B-B which is in turn is parallel to horizontal axis A-A
allowing coarse scale 32 on axis A-A to be used to indi cate the distance between the ends of pins 42 and 40 on axis B-B. Receiving bracket 20 has a horizontal portion with an enlarged cross section and central cavity 24 to house gauge member 30. Receiving bracket 20 and internal cavity 24 are of sufficient length to fully accept the horizontal portion of gauge member 30. Coarse scale 32 inscribed on one surface of gauge member 30. Scale 32 is is positioned on gauge member 30 such that pointer 37, mounted to receiving bracket 20, always indicates the distance between the ends of pins 42 and 40. To obtain a more accurate measure of the distance between pins 40 and 42 than coarse scale 32 can provide, dial gauge 12 is provided to act as a vernier gauge. Dial gauge 12 comprises a housing 13 with a centrally mounted, rotating ponter 15 and circular scale 17 contained therein, beneath a transparent cover 11. Dial gauge 12 operates , :
,~, , . , .
,'' ~ , L7~
such that each time pointer 37 moves between any adjacent markings on coarse scale 32, rotating pointer 15 de-scribes one full revolution of circular scale 17 and, in doing so, rotating pointer 15, divides the distance bet-ween adjacent markings on coarse scale 32 into smaller units as indicated on circular scale 17 of dial gauge 12.
Dial gauge 12 performs its vernier scale func-tion using a rack and pinion system to drive a rotating pointer 15. Rack 34 extends the horizontal len~th of gauge member 30 with serrated inner edges 35 and 36.
Geared drive wheel 29 held in rack 34, is connected through a shaft 31 and a series of gears (not shown) to rotating pointer 15. Dial gauge 12 is mounted atop receiving bracket 20 and shaft 31 extends through an opening in receiving bracket 20 to communicate with geared drive wheel 29 in rack 34. As gauge member 30 is moved back and forth in cavity 24 of receiving bracket 20, geared drive wheel 29 rotates due to the horizontal motion of rack 34. This rotary motion is transmitted through shaft 31 and an appropriate gear system to move rotating pointer 15 an appropriate distance relative to circular scale 17 of dial gauge 12 to indicate the small horizontal distance travelled by rack 34.
Dial gauge 12 is also equipped wi~h lock button 16. When depresed this button 16 locks the dial gauge in position.
.
:
~2~
Locking screw 14 extends through the side wall of receving bracket 20 and can be used to lock gauge member 30 in place relative to receving bracket 20. By rotating the screw inwardly until gauge member 30 is clamped between the ends 23 of the locking screw 14 and the opposite wall of cavity 24, the appropriate locking is achieved.
The present invention also includes a calibra-tion bar 50 of a predetermined length between its two end tabs 51 and 52. In order to calibrate the present invet-nion, the gauge member 30 is positioned in receving bracket 20 such that pointer 37 of coarse scale 32 and rotating pointer 15 of dial gauge 12 indicates the known length of the calibration bar. Pins 40 and 42 are inserted between end tabs 51 and 52 of calibration bar 50. If necessary, adjustable pin 40 can be moved inwardly or outwardly, after loosening lock nut 22, to ensure that pins 40 and 42 span a distance equal to that indicated by the calibration of the coarse scale and dial gauge.
The first embodiment of the invention can be used while the brake drums are still in place on the vehicle. After removing the brake drum and inspection plate, the U-shape of the apparatus of the present inven-~7~
tion allows it to fit around the vehicle's axles and thedescending arms are formed so as to allow pins 40 and 42 to be inserted into the interior of the brake shoe.
Inside the brake drum pins 40 and 42 abut against the internal braking surface of the shoe. Coarse gauge 32 and dial gauge 12 in combination give an accurate measurement of the internal diameter of the brake drum.
Thus brake drum wear can be instantly deter-mined to see whether the internal diameter is still within a predetermined range fixed by the manufacturer.
If not, replacement of the brake drum is necessary.
The embodiment of Figure 3 is for use with smaller brake drums. In Figure 3, where appropriate 9 the same reference numerals are used where the item is also described in Figure 1. In the embodiment of Figure 3 descending arms 38 and 18, to which pins 40 and 42 are mounted, are mounted vertically beneath horizontal axes of gauge member 30 and receiving bracket 20.
In using the embodiment of Figure 3 of the pre-sent invention the brake drum to be inspected is first removed from the vehicle. Arms 38 and 18 are inserted into the brake drum and pins 40 and 42 brought into con-tact with the drums internal braking surface. The drum's internal diameter can be read from the coarse scale 32 .
.
' , . ' ' , ~2~
and dial gauge 12, to determine whether the drums are within manufacturer's tolerance.
' ' ' ' ' ` ' .
Claims (8)
1. A brake drum measuring apparatus comprising:
a receiving bracket having a main portion with a longitudinal cavity and a distal, depending portion for mounting a pin to abut against the inner circumference of a brake drum;
a gauge member slidably received within the longitudinal cavity of the receiving bracket, having a main portion with a coarse measuring scale, an actuating means for operating a fine measuring scale, a distal depending portion for mounting a pin to abut against the inner circumference of a brake drum;
locking means for fixing the position of the gauge member in the longitudinal cavity of the receiving bracket;
fine measuring scale means mounted on said receiving bracket cooperating with said actuating means of said gauge member as the gauge member slides in the longitudinal cavity; and a pointer mounted on said receiving bracket to point to the coarse measuring scale, said distal depending portions of said receiving bracket and said gauge member comprising coplanar first portions extending from said main portions in an essentially vertical plane, said first portions being bent to form coplanar second portions extending out of said vertical plane, each of said second portions providing a mounting location for one of said pins, said pins defining an axis that is parallel to the longitudinal cavity of said receiving bracket.
a receiving bracket having a main portion with a longitudinal cavity and a distal, depending portion for mounting a pin to abut against the inner circumference of a brake drum;
a gauge member slidably received within the longitudinal cavity of the receiving bracket, having a main portion with a coarse measuring scale, an actuating means for operating a fine measuring scale, a distal depending portion for mounting a pin to abut against the inner circumference of a brake drum;
locking means for fixing the position of the gauge member in the longitudinal cavity of the receiving bracket;
fine measuring scale means mounted on said receiving bracket cooperating with said actuating means of said gauge member as the gauge member slides in the longitudinal cavity; and a pointer mounted on said receiving bracket to point to the coarse measuring scale, said distal depending portions of said receiving bracket and said gauge member comprising coplanar first portions extending from said main portions in an essentially vertical plane, said first portions being bent to form coplanar second portions extending out of said vertical plane, each of said second portions providing a mounting location for one of said pins, said pins defining an axis that is parallel to the longitudinal cavity of said receiving bracket.
2. Apparatus as claimed in claim 1 in which the pin attached to the depending portion of the receiving bracket is adjustably mounted.
3. Apparatus as claimed in claim 1 in which said locking means comprises a screw threaded through said receiving bracket into the longitudinal cavity so as to clamp the slidable gauge member in the longitudinal cavity between the opposite walls of said longitudinal cavity and said screw end when the screw is threaded inwardly.
4. Apparatus as claimed in claim 1 in which the apparatus is adjustable to measure a minimum brake drum diameter of 14" and a maximum diameter of 20 1/4".
5. Apparatus as claimed in claim 1 including calibration means for the apparatus.
6. Apparatus as claimed in claim 5 in which the calibration means comprises a rod of known length with stop tabs at opposite ends whereby the coarse measuring scale means are set to indicate a distance equal to the known length of the rod and the pin of said brake drum measuring apparatus are inserted between the stop tabs and the adjustable pin is adjusted until it abuts against one of said stop tabs.
7. Apparatus as claimed in claim 1 in which the actuating means operating the fine measuring scale means is a rack.
8. Apparatus as claimed in claim 1 in which the fine measuring scale comprises a dial gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000536322A CA1279476C (en) | 1987-05-04 | 1987-05-04 | Brake drum measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000536322A CA1279476C (en) | 1987-05-04 | 1987-05-04 | Brake drum measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1279476C true CA1279476C (en) | 1991-01-29 |
Family
ID=4135577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000536322A Expired - Lifetime CA1279476C (en) | 1987-05-04 | 1987-05-04 | Brake drum measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1279476C (en) |
-
1987
- 1987-05-04 CA CA000536322A patent/CA1279476C/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4782595A (en) | Brake drum measuring apparatus | |
| EP0791165B1 (en) | Gage set for measuring inside and outside diameters of ring-shaped parts | |
| US2642670A (en) | Gauge | |
| EP0975934B1 (en) | Method for determining the position of a point | |
| US5428903A (en) | Measuring instrument | |
| EP0327669B1 (en) | Dial bore gage | |
| CA1279476C (en) | Brake drum measuring apparatus | |
| US2540961A (en) | Pivot arm gear rolling fixture | |
| US4114280A (en) | Digital electronic indicator | |
| US4126940A (en) | Adjustable fork gauge | |
| JP2894825B2 (en) | Keyway measuring device and method of using the same | |
| US5465501A (en) | Gage with adjustable depth stops for measuring distance between two spaced surfaces | |
| US3745661A (en) | Brake gauge for measuring brake drums and brake disc rotors | |
| US4432141A (en) | High precision height comparator apparatus | |
| US2592840A (en) | Measuring gauge | |
| US2331757A (en) | Internal thread gauge | |
| US4483078A (en) | Inner diameter and bore gauge | |
| US2087896A (en) | Adjustable limit gauge | |
| US2791033A (en) | Adapter for dial indicators | |
| US2438274A (en) | Internal bore gauge | |
| US3208148A (en) | Machinist's pivotal caliper with attached dial indicator | |
| US2466916A (en) | Attachment for inside micrometers | |
| US3585726A (en) | Angularly adjustable stem for dial indicators and the like | |
| US3214839A (en) | Gauge for measuring alignment or misalignment and axially spacing of shafts | |
| US1878990A (en) | Micrometer gauge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |