GB1295031A - - Google Patents
Info
- Publication number
- GB1295031A GB1295031A GB1295031DA GB1295031A GB 1295031 A GB1295031 A GB 1295031A GB 1295031D A GB1295031D A GB 1295031DA GB 1295031 A GB1295031 A GB 1295031A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- pressure
- piston
- cylinder
- keeper
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
-
- 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
- B60C23/0425—Means comprising permanent magnets, e.g. Hall-effect or Reed-switches
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
1295031 Tyre underinflation indicator BENDIX CORP 1 Jan 1970 [22 Jan 1969] 61/70 Heading B7C [Also in Division G1] A fluid pressure sensing device 10, 11 for detecting pressure changes in a rotating chamber 14 comprises a piston 28 movable by pressure changes within a cylinder 26 having an open end 27, a magnet 32 located axially of the cylinder, a tubular magnetic shield 31 surrounding the magnet, the magnet and shield being relatively, axially movable in response to movements of the piston, a resilient means 34 for biasing the piston against the fluid pressure, and a magnetic flux sensing coil 11 of conductive wire to be stationarily positioned near the rotational path of the magnet, the coil being suitable for connection to a warning system. In a first embodiment permanent magnet 32 is immovably mounted within a cylinder 26 of non-magnetic material which is open at 27 to the pressure being sensed. Piston 28 is biased against this pressure by spring 34 and has a part 31 attached (called the keeper) which at the correct pressure surrounds the magnet (Fig. 2, not shown). Piston 28 and keeper 31 are of magnetic material so that at the correct pressure, the magnetic flux hardly if at all extends beyond the end 33 of the cylinder. When the pressure is reduced, the piston and keeper withdraw from the magnet as shown in Fig. 3 and the flux extends beyond end 33. Alternatively (Figs. 4, 5, not shown) the magnet (41) is mounted on the piston stem (39), the keeper (42) is fixed, and reduction of pressure in the chamber causes the piston to retract the magnet (41) into the cylinder and into the shield provided by the keeper (42) thus removing the flux outside of the cylinder. The flux, when outside of the sensing device, passes through coil 11 as the chamber rotates and generates an e.m.f. which provides a warning signal by causing a light to flash (Fig. 6) or by operating a switch (Figs. 7, 8) causes a light to come on or go off as desired. Fig. 1 shows the device 10 in place on a vehicle wheel, detecting pressure in an inflated tyre.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US79311969A | 1969-01-22 | 1969-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1295031A true GB1295031A (en) | 1972-11-01 |
Family
ID=25159140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1295031D Expired GB1295031A (en) | 1969-01-22 | 1970-01-01 |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2002829A1 (en) |
FR (1) | FR2028858A1 (en) |
GB (1) | GB1295031A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107816741A (en) * | 2017-11-03 | 2018-03-20 | 火星人厨具股份有限公司 | The oil reserve alarm set of oil collection box on a kind of integrated kitchen range |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS519634B1 (en) * | 1971-05-10 | 1976-03-29 | ||
US4237445A (en) * | 1979-07-30 | 1980-12-02 | Goodyear Aerospace Corporation | Tire pressure communication devices |
FR2579323B1 (en) * | 1985-03-22 | 1987-08-14 | Renault | MAGNETIC TIRE PRESSURE MONITORING DEVICE |
EP3772318A1 (en) | 2019-08-06 | 2021-02-10 | Delmont Imaging SAS | Hysteroscope |
-
1970
- 1970-01-01 GB GB1295031D patent/GB1295031A/en not_active Expired
- 1970-01-15 FR FR7001412A patent/FR2028858A1/fr not_active Withdrawn
- 1970-01-22 DE DE19702002829 patent/DE2002829A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107816741A (en) * | 2017-11-03 | 2018-03-20 | 火星人厨具股份有限公司 | The oil reserve alarm set of oil collection box on a kind of integrated kitchen range |
CN107816741B (en) * | 2017-11-03 | 2024-04-26 | 火星人厨具股份有限公司 | Oil storage quantity reminding device of oil collecting box on integrated kitchen |
Also Published As
Publication number | Publication date |
---|---|
DE2002829A1 (en) | 1970-07-23 |
FR2028858A1 (en) | 1970-10-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |