GB150286A - Improvements in and relating to centrifugal pumps for use with pneumatically operated mechanisms - Google Patents
Improvements in and relating to centrifugal pumps for use with pneumatically operated mechanismsInfo
- Publication number
- GB150286A GB150286A GB24060/20A GB2406020A GB150286A GB 150286 A GB150286 A GB 150286A GB 24060/20 A GB24060/20 A GB 24060/20A GB 2406020 A GB2406020 A GB 2406020A GB 150286 A GB150286 A GB 150286A
- Authority
- GB
- United Kingdom
- Prior art keywords
- casing
- apertures
- air
- piano
- enter
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
- F04D17/164—Multi-stage fans, e.g. for vacuum cleaners
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
150,286. Cramer, S. S. Aug. 21, 1919, [Convention date]. Exhausting air; expressioncontrolling.-A pneumaticallyoperated piano-player is connected to the casing of a centrifugal pump driven by an electric motor; a spring-controlled valve for relieving the vacuum is secured to the casing, and is set at its minimum limit to permit air to enter to cool the motor; it may be moved by hand to permit air to enter at varying rates. The casing is constructed to minimize the sound escaping. The casing is made in two parts 1, 4, Fig. 1, and the inner surface of the sections 6. 7 are covered with fibrous material 9, with apertures 10 registering with apertures 8 in part 7 of the casing. A baffle-plate 11 with sound-insulating walls is secured on the outside of the casing bottom. A pipe 91 from the piano mechanism conveys air to a large aperture 90 in the casing, and the opening is screened by a mesh section 94, Air is also admitted through apertures 98 which may be opened to varying degrees by means of a cover disk 100 with a similar series of apertures and which can be rotated on a spindle 101. The disc has an operating-arm 102 movable between limit screws 106, and held by a spring 109 in a predetermined position to permit air to enter to cool the motor under any conditions, The disc 100 may be adjusted to allow a high pressure in the piano mechanism to produce sounds of low intensity or to produce loud crash music. The complete arrangement may be supported on flexible supports inside or outside the piano.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US150286XA | 1919-08-21 | 1919-08-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB150286A true GB150286A (en) | 1921-07-14 |
Family
ID=21769150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24060/20A Expired GB150286A (en) | 1919-08-21 | 1920-08-18 | Improvements in and relating to centrifugal pumps for use with pneumatically operated mechanisms |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB150286A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4130901A1 (en) * | 1990-12-20 | 1992-06-25 | Dunphy Oil & Gas Burners | FAN |
FR2698917A1 (en) * | 1992-12-09 | 1994-06-10 | Bosch Gmbh Robert | Fan housing, especially for a secondary fan of an internal combustion engine. |
EP0644334A1 (en) * | 1993-09-16 | 1995-03-22 | Electrolux Limited | Air impeller and devices incorporating air impellers |
CN109441875A (en) * | 2018-12-25 | 2019-03-08 | 大连金刚科技有限责任公司 | Impeller and gas pump |
-
1920
- 1920-08-18 GB GB24060/20A patent/GB150286A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4130901A1 (en) * | 1990-12-20 | 1992-06-25 | Dunphy Oil & Gas Burners | FAN |
FR2698917A1 (en) * | 1992-12-09 | 1994-06-10 | Bosch Gmbh Robert | Fan housing, especially for a secondary fan of an internal combustion engine. |
EP0644334A1 (en) * | 1993-09-16 | 1995-03-22 | Electrolux Limited | Air impeller and devices incorporating air impellers |
CN109441875A (en) * | 2018-12-25 | 2019-03-08 | 大连金刚科技有限责任公司 | Impeller and gas pump |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2460408A (en) | Amplified accordion | |
GB150286A (en) | Improvements in and relating to centrifugal pumps for use with pneumatically operated mechanisms | |
US2121008A (en) | Acoustic translating device | |
US2185932A (en) | Musical instrument | |
US1698804A (en) | Signaling device | |
US2983178A (en) | Accordion-organ | |
US1506393A (en) | Sound amplifier | |
GB464996A (en) | Improvements in or relating to sound translating devices | |
GB229868A (en) | Improvements in or relating to vacuum producing devices for player pianos | |
US2520079A (en) | Reed mute | |
US1360577A (en) | Amplifier for sound-reproducing machines | |
US1445915A (en) | Phonograph tone chamber | |
US1358706A (en) | Sound-amplifier for talking-machine | |
US2395719A (en) | Reception or transmission of sound vibrations | |
US1343004A (en) | Pneumatic pump | |
US1373593A (en) | Action for pneumatic musical instruments | |
US1458596A (en) | Phonograph | |
US1191808A (en) | Sound-regulator. | |
USRE12963E (en) | Combined stand and horn fob talking-machines | |
US1188374A (en) | Sound-reproducing machine. | |
US1369530A (en) | Player-piano | |
US5657A (en) | Sebaphine | |
US2122094A (en) | Resounding-board for accordions | |
US791542A (en) | Automatic expression device for mechanical musical instruments. | |
US1242466A (en) | Expression control for musical instruments. |