GB816265A - Neck forming device for making acoustic diaphragms - Google Patents
Neck forming device for making acoustic diaphragmsInfo
- Publication number
- GB816265A GB816265A GB1113757A GB1113757A GB816265A GB 816265 A GB816265 A GB 816265A GB 1113757 A GB1113757 A GB 1113757A GB 1113757 A GB1113757 A GB 1113757A GB 816265 A GB816265 A GB 816265A
- Authority
- GB
- United Kingdom
- Prior art keywords
- die
- diaphragm
- neck
- perforations
- centred
- 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
- 210000000188 Diaphragm Anatomy 0.000 title abstract 9
- 238000000465 moulding Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
816,265. Moulding acoustic diaphragms. HAWLEY PRODUCTS CO. April 5, 1957, No. 11137/57. Class 87(2). An acoustic diaphragm made from accreted fibres or blanks of paper is formed with a neck by placing the diaphragm on a perforated male die 2 and moving a shaping member 7 downwards until the opening 41, Fig. 5 in the die ring 35 contacts the diaphragm. If the die is not exactly centred with respect to the diaphragm, it centres itself automatically, as the die is free to move laterally by means of ball bearings 34. After the die has centred itself, continued movement of the die causes the neck 45 to be shaped. The diaphragm may be held in place by applying vacuum to the perforations 49 in the die 2. The formed diaphragm may be removed by supplying air through the perforations 49. The diaphragm may be heated by a gas oven 57 which is shown in a raised position in Fig. 1 but is normally lowered to rest on the frame 11 carrying the die. The die may have a counterweight 55 or the cord 52 may be attached to a pneumatic piston. Specification 719,992 is referred to.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB816265A true GB816265A (en) | 1959-07-08 |
Family
ID=1705944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1113757A Expired GB816265A (en) | 1957-04-05 | Neck forming device for making acoustic diaphragms |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB816265A (en) |
-
1957
- 1957-04-05 GB GB1113757A patent/GB816265A/en not_active Expired
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