US1920741A - Radiocabinet - Google Patents
Radiocabinet Download PDFInfo
- Publication number
- US1920741A US1920741A US305286A US30528628A US1920741A US 1920741 A US1920741 A US 1920741A US 305286 A US305286 A US 305286A US 30528628 A US30528628 A US 30528628A US 1920741 A US1920741 A US 1920741A
- Authority
- US
- United States
- Prior art keywords
- metal
- tuning elements
- case
- walls
- radio
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 description 11
- 229920001342 Bakelite® Polymers 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 239000004637 bakelite Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 241001033172 Coryphopterus bol Species 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/08—Constructional details, e.g. cabinet
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49016—Antenna or wave energy "plumbing" making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49888—Subsequently coating
Definitions
- This invention has reference to a receiving set for radio telephony, telegraphy, or the like.
- These devices contain tuning elements, such as variable condensers, which serve to syntonize definite oscillation circuits consisting of a self-inductance L and a capacity C. It has been found that these oscillation circuits are extremely sensitive and that low capacitive influences may have an interfering effect. It is known, in order to prevent these influences, to surround the tuning elements by a screening metal envelope.
- the electrical devices are usually enclosed in a' case which is constructed of wood, ebonite, bakelite, or similar material. If the device is surrounded by such a case it is necessary to construct a separate metal envelope for the tuning elements and to arrange it in the case.
- the cabinet comprises a case of which the walls or portions of the walls consist of insulating material which is coated with a metal layer, which metal is sprayed on in a state of pulverization. If the inner side of the wall is coatedwith the metal layer the wall can be prolonged'by metal partitions or walls.
- the invention is particularly advantageous in connection with devicesin which tuning means are arranged.
- Figure 1 is a perspective view of a case of a receiving set for radiotelephony.
- Figure 2 is a perspective view of the case, part of the wall being broken away.
- Figure 3 is a side wall of the case which consists of insulating material and is partly coated with a metal layer.
- FIG. 2 the inner part of the device is shown. It is separated into two parts by a horizontal wall a.
- tuning elements such, for example, as variable condensers, are to be arranged. It is desirable that these elements be surrounded by a metal envelope.
- partition a may be made of metal, and the walls 12, c, and (2 made of ebonite, bakelite, or wood,
- This layer may be formed on'the walls by spray-.-v
- a method of constructing radio cabinets which comprises partitioning the cabinet interior into at least two compartments one of said compartments serving to house the tuning elements of the radio apparatus and coating the inside surface of at least the compartment adapted to 7 house the tuning elements with a spray of shielding material.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Structure Of Receivers (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
Aug. 1, 1933. c. BOL 1,920,741
RADIOCABINET Filed Sept. 11, 1928 INVENTOR CORNELIS 501.
-4a /Mwww A ORNEY Patented Aug. 1, 1933 UNITED STATES 1,920,741 RADIOOABINET Cornelis Bol, Eindhoven, Netherlands, assignor to Radio Corporation of America, a Corporation of Delaware Application September 11, 1928, Serial No. 305,286, and in the Netherlands September 20,
2 Claims. (01. 250-16) This invention has reference to a receiving set for radio telephony, telegraphy, or the like. These devices contain tuning elements, such as variable condensers, which serve to syntonize definite oscillation circuits consisting of a self-inductance L and a capacity C. It has been found that these oscillation circuits are extremely sensitive and that low capacitive influences may have an interfering effect. It is known, in order to prevent these influences, to surround the tuning elements by a screening metal envelope.
The electrical devices are usually enclosed in a' case which is constructed of wood, ebonite, bakelite, or similar material. If the device is surrounded by such a case it is necessary to construct a separate metal envelope for the tuning elements and to arrange it in the case.
According to the invention the cabinet comprises a case of which the walls or portions of the walls consist of insulating material which is coated with a metal layer, which metal is sprayed on in a state of pulverization. If the inner side of the wall is coatedwith the metal layer the wall can be prolonged'by metal partitions or walls. As mentioned before, the invention is particularly advantageous in connection with devicesin which tuning means are arranged.
The invention will be more clearly understood by reference to the accompanying drawing. In the drawing:
Figure 1 is a perspective view of a case of a receiving set for radiotelephony.
Figure 2 is a perspective view of the case, part of the wall being broken away.
Figure 3 is a side wall of the case which consists of insulating material and is partly coated with a metal layer.
In Figure 2 the inner part of the device is shown. It is separated into two parts by a horizontal wall a. In the upper part tuning elements such, for example, as variable condensers, are to be arranged. It is desirable that these elements be surrounded by a metal envelope. The
partition a may be made of metal, and the walls 12, c, and (2 made of ebonite, bakelite, or wood,
provided on the inner side with a metal layer.
This layer may be formed on'the walls by spray-.-v
erators, and other electrical devices where shield-- ing is desirable.
What I claim is: I
1. A method of constructing radio cabinets which comprises partitioning the cabinet interior into at least two compartments one of said compartments serving to house the tuning elements of the radio apparatus and coating the inside surface of at least the compartment adapted to 7 house the tuning elements with a spray of shielding material.
2. The steps in a method of constructing radio cabinetswhich comprise dividing the cabinet interior into at least two compartments into one of which the tuning elements of the radio apparatus are adapted to be housed and coating the inside surface of. the compartment adapted to house the tuning elements witha layer of metal applied in a pulverized state.
CORNELIS BOL.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1920741X | 1927-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1920741A true US1920741A (en) | 1933-08-01 |
Family
ID=19873298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US305286A Expired - Lifetime US1920741A (en) | 1927-09-20 | 1928-09-11 | Radiocabinet |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1920741A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2468727A (en) * | 1944-06-14 | 1949-05-03 | Kurz Kasch Inc | Sectional radio cabinet |
| US2594971A (en) * | 1940-02-06 | 1952-04-29 | Gen Electric | Barrier nonreflectant to incident electromagnetic waves |
| US2740926A (en) * | 1951-11-20 | 1956-04-03 | Jennings Radio Mfg Corp | Vacuum variable condenser |
| US4091522A (en) * | 1976-12-06 | 1978-05-30 | Triangle Pacific Corp. (Tripac) | Method of assembling a cabinet frame and door to permit internally coating same |
-
1928
- 1928-09-11 US US305286A patent/US1920741A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2594971A (en) * | 1940-02-06 | 1952-04-29 | Gen Electric | Barrier nonreflectant to incident electromagnetic waves |
| US2468727A (en) * | 1944-06-14 | 1949-05-03 | Kurz Kasch Inc | Sectional radio cabinet |
| US2740926A (en) * | 1951-11-20 | 1956-04-03 | Jennings Radio Mfg Corp | Vacuum variable condenser |
| US4091522A (en) * | 1976-12-06 | 1978-05-30 | Triangle Pacific Corp. (Tripac) | Method of assembling a cabinet frame and door to permit internally coating same |
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