GB329779A - Combined pressure indicator and low pressure alarm for pneumatic tyres - Google Patents
Combined pressure indicator and low pressure alarm for pneumatic tyresInfo
- Publication number
- GB329779A GB329779A GB1113729A GB1113729A GB329779A GB 329779 A GB329779 A GB 329779A GB 1113729 A GB1113729 A GB 1113729A GB 1113729 A GB1113729 A GB 1113729A GB 329779 A GB329779 A GB 329779A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- spring
- rod
- contact pin
- tyre
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
- B60C23/0467—Electric contact means, e.g. slip-rings, rollers, brushes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
329,779. Menz, H., and Steffen, W. April 10, 1929. No Patent granted (Sealing fee not paid). Pneumatic-tyre pressure gauges with signad and alarm arrangements. - A combined pressure indicator and low-pressure alarm for pneumatic tyres comprises a casing 1 which is fixed in an aperture 16 in the wheel rim 17 at a point opposite to the position of the tyre valve. The casing has a vertical arm housing a piston 3, and a horizontal arm 9 housing a hollow rod 10. The piston is pressed by a spring 12 into engagement with the inner tube 18, which at this point is protected by a pad 19, and the piston rod 5 projects from the lower end of the casing and is furnished with differently coloured rings 6. The rod 10 houses a contact pin 13 pressed outwardly by a spring 11, and at its rear end embraces a reduced part of the piston 3 and carries a pin 20<1> engaging in an inclined slot 4 in the piston. When the inner tube is inflated, the piston is pressed outwardly, the rings 6 indicating the degree of inflation. If the tyre becomes deflated, the piston rises, causing the rod 10 to be projected from the arm 9. The contact pin 13 then engages a contact bridge arranged in an optical or acoustical alarm circuit. In a modification, Fig. 4, the contact pin has an extension 25 formed with a groove 24 in which engages a spring plunger 27 carried in the piston 21. When the tyre becomes deflated, the piston rises, carrying with it the plunger 27. This allows the contact pin to be projected by its spring 28 to engage the contact bridge.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM103696D DE492805C (en) | 1928-02-29 | 1928-02-29 | Device for indicating the escape of air from the tires of motor vehicles and the air pressure present in the tire |
| GB1113729A GB329779A (en) | 1929-04-10 | 1929-04-10 | Combined pressure indicator and low pressure alarm for pneumatic tyres |
| FR673956D FR673956A (en) | 1929-04-10 | 1929-04-24 | Tire depression indicator, also simultaneously indicating the internal tire pressure |
| BE360283D BE360283A (en) | 1929-04-10 | 1929-04-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1113729A GB329779A (en) | 1929-04-10 | 1929-04-10 | Combined pressure indicator and low pressure alarm for pneumatic tyres |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB329779A true GB329779A (en) | 1930-05-29 |
Family
ID=9980708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1113729A Expired GB329779A (en) | 1928-02-29 | 1929-04-10 | Combined pressure indicator and low pressure alarm for pneumatic tyres |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE360283A (en) |
| FR (1) | FR673956A (en) |
| GB (1) | GB329779A (en) |
-
1929
- 1929-04-10 GB GB1113729A patent/GB329779A/en not_active Expired
- 1929-04-24 FR FR673956D patent/FR673956A/en not_active Expired
- 1929-04-30 BE BE360283D patent/BE360283A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR673956A (en) | 1930-01-22 |
| BE360283A (en) | 1929-05-31 |
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