GB621032A - Improvements in or relating to sound reproducing and/or amplifying devices - Google Patents
Improvements in or relating to sound reproducing and/or amplifying devicesInfo
- Publication number
- GB621032A GB621032A GB22728/45A GB2272845A GB621032A GB 621032 A GB621032 A GB 621032A GB 22728/45 A GB22728/45 A GB 22728/45A GB 2272845 A GB2272845 A GB 2272845A GB 621032 A GB621032 A GB 621032A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- air
- spring
- seating
- armature
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/42—Combinations of transducers with fluid-pressure or other non-electrical amplifying means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Magnetically Actuated Valves (AREA)
- Micromachines (AREA)
- Reciprocating Pumps (AREA)
- Details Of Valves (AREA)
Abstract
621,032. Telephone instruments. DILKS, C. F. Sept. 4, 1945, No. 22728. Convention date, May 28, 1941. [Class 40 (iv)] A sound amplifier comprises a chamber into which air is admitted under pressure and an electromagnetically controlled valve which controls its passage to an outlet. It also comprises a diaphragm which determines the initial setting of the valve under the influence of the air pressure. Air enters the chamber 15, Fig. 1, through a pipe 17 and filter 20 and passes into the outlet 23 through a valve plate 27 adjacent to a seating 25. The valve 27 is supported at one end on a spring strip 30 while its.other end carries an iron armature connected through a flat spring to a rigid support 39. The setting of the spring, and thus of the valve, is determined by a lever 49 to which it is connected and to the outer end of which is linked a flexible diaphragm 64. The air pressure deflects the diaphragm and so lifts the valve slightly off its seating to an extent depending on the pressure. This movement is adjustable by means of a screw 54 engaging a nut 58 which depresses the lever 49 through a spring 57. Polepieces attached to a permanent magnet 81 lie on opposite sides of the armature 32 and are so placed that speech currents passed through a coil 72 cause the armature 32 and valve plate 27 to oscillate. The valve 27 comprises a rectangular block having transverse holes drilled through it parallel to the working face and these allow air to pass to a series of parallel grooves cut in the under face of the block at right angles to the holes. The seating 25 has a similar series of slots arranged in staggered relation to the grooves in the valve so as to prevent a direct flow of air through the valve.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US395519A US2384371A (en) | 1941-05-28 | 1941-05-28 | Sound reproducing and amplifying device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB621032A true GB621032A (en) | 1949-04-04 |
Family
ID=23563387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22728/45A Expired GB621032A (en) | 1941-05-28 | 1945-09-04 | Improvements in or relating to sound reproducing and/or amplifying devices |
Country Status (2)
Country | Link |
---|---|
US (1) | US2384371A (en) |
GB (1) | GB621032A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2434842A (en) * | 1942-01-01 | 1948-01-20 | Eaves Sound Projectors Inc | Pneumatic sound producing device |
US2428269A (en) * | 1942-09-02 | 1947-09-30 | Eaves Sound Projectors Inc | Pneumatic sound producing device |
US2485269A (en) * | 1946-01-29 | 1949-10-18 | Joseph L Fodor | Electropneumatic loud-speaker |
US2798121A (en) * | 1954-05-12 | 1957-07-02 | Toledo Trust Company | Electropneumatic loud-speaker |
-
1941
- 1941-05-28 US US395519A patent/US2384371A/en not_active Expired - Lifetime
-
1945
- 1945-09-04 GB GB22728/45A patent/GB621032A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2384371A (en) | 1945-09-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
MX155859A (en) | IMPROVEMENTS TO AN ELECTROMAGNETIC VALVE | |
GB690897A (en) | Improvements relating to non-return valves | |
US3099995A (en) | Electro-pneumatic transducer | |
GB783323A (en) | Constant flow control valve | |
GB621032A (en) | Improvements in or relating to sound reproducing and/or amplifying devices | |
GB1487463A (en) | Vapour trap | |
FR2284812A1 (en) | Membrane shut off valve for gas or liquid - is operated by external permanent magnet | |
ATE661T1 (en) | GAS PRESSURE REGULATOR. | |
ES413187A1 (en) | Solenoid valve | |
GB1023101A (en) | Fluid control means | |
GB715600A (en) | Improvements in and relating to pressure differential valves | |
GB467681A (en) | Improvements in or relating to acoustic devices | |
FR2271477A1 (en) | Safety valve for gas installations - responds to high or low pressure in gas outlet by activating a magnetic valve | |
FR2268208A1 (en) | Pipeline flow limiting device - uses variation in fluid dynamic pressure to alter size of flow passages | |
GB988425A (en) | Apparatus for generating pneumatic signals | |
GB540026A (en) | Improvements in and relating to reducing valves | |
GB772292A (en) | Improvements in or relating to valves for the control of fluid flow | |
FR2425026A1 (en) | Solenoid-operated valve - has two of three outlet diaphragms with bore controlled by solenoid | |
GB900153A (en) | Improvements in valves for controlling fluids | |
EP0084214A3 (en) | Electromagnetic-pneumatic current to pressure transducer | |
GB1400812A (en) | Steam driven diaphragm valve sound transmitter | |
GB759492A (en) | Improvements relating to manually operated diaphragm type valves | |
GB1032778A (en) | Improvements in or relating to magnetic tape recording and reproducing apparatus | |
GB265015A (en) | Self driving apparatus for compressing air | |
GB264423A (en) | Improvements in and relating to automatic gas regulators |