GB843547A - Improvements relating to spark machining apparatus - Google Patents
Improvements relating to spark machining apparatusInfo
- Publication number
- GB843547A GB843547A GB25027/56A GB2502756A GB843547A GB 843547 A GB843547 A GB 843547A GB 25027/56 A GB25027/56 A GB 25027/56A GB 2502756 A GB2502756 A GB 2502756A GB 843547 A GB843547 A GB 843547A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- point
- over
- aug
- condenser
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
- B23H1/022—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges for shaping the discharge pulse train
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
843,547. Removing metal by spark erosion. G.K.N. GROUP SERVICES Ltd. Aug. 16, 1957 [Aug. 16, 1956], No. 25027/56. Class 83 (4). [Also in Group XXXV] To maintain a substantially constant sparkgap length in spark-machining apparatus of the kind wherein a condenser C1, charged from a D.C. source over a resistor R1, discharges over a gap between the work w and an electrode t which is adjustable relatively to the work by a reversible motor m, the motor has a low resistance control winding connected between a point in the discharge circuit at which appears a sawtooth voltage and a point on the supply side of the resistor R1 at which the average voltage approximates to the average voltage at the connection point in the discharge circuit when the gap is of the required length. The circuit completed through these connections must have a sufficiently low D.C. resistance to limit overrun of the motor. The motor is connected to the movable electrode through gearing of high velocity ratio. In the arrangement shown, motor m is connected between the upper end of condenser C1 and a centre tapping b3 of the secondary winding of a transformer T1 which supplies the charging circuit over rectifier bridge w1-w4. A choke L2 smooths the motor current. The motor may have a permanent magnet field, or a field winding f which is excited from the rectifier bridge. Specifications 843,546 and 843,548 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB344146X | 1956-08-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB843547A true GB843547A (en) | 1960-08-04 |
Family
ID=10365350
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25026/56A Expired GB843546A (en) | 1956-08-16 | 1956-08-16 | Improvements relating to spark machining apparatus |
| GB25027/56A Expired GB843547A (en) | 1956-08-16 | 1956-08-16 | Improvements relating to spark machining apparatus |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25026/56A Expired GB843546A (en) | 1956-08-16 | 1956-08-16 | Improvements relating to spark machining apparatus |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH344146A (en) |
| DE (1) | DE1055152B (en) |
| FR (1) | FR1182458A (en) |
| GB (2) | GB843546A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL124255C (en) * | 1959-12-09 | |||
| US5399825A (en) * | 1991-03-01 | 1995-03-21 | Creare, Inc. | Inductor-charged electric discharge machining power supply |
-
1956
- 1956-08-16 GB GB25026/56A patent/GB843546A/en not_active Expired
- 1956-08-16 GB GB25027/56A patent/GB843547A/en not_active Expired
-
1957
- 1957-08-15 CH CH344146D patent/CH344146A/en unknown
- 1957-08-16 FR FR1182458D patent/FR1182458A/en not_active Expired
- 1957-08-16 DE DEG22759A patent/DE1055152B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1055152B (en) | 1959-04-16 |
| FR1182458A (en) | 1959-06-25 |
| CH344146A (en) | 1960-01-31 |
| GB843546A (en) | 1960-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3169212A (en) | Transistorized ignition system | |
| US2280949A (en) | Electric signaling | |
| GB788366A (en) | Improvements in and relating to electric arc machining apparatus | |
| US2985797A (en) | Application of semiconductors to ignition circuitry | |
| GB782443A (en) | Improvements in electrical spark machining devices | |
| US2514235A (en) | System for controlling the charging of storage batteries | |
| GB843547A (en) | Improvements relating to spark machining apparatus | |
| GB1403377A (en) | Ignition apparatus operating on a capacitive discharge ignition principle | |
| GB1013131A (en) | Improvements in or relating to ratemeters for electrical pulses | |
| GB578514A (en) | Improvements relating to circuits used in generating electric impulses | |
| GB529558A (en) | Improvements in and relating to electrical ignition apparatus | |
| GB862902A (en) | Improvements in apparatus for machining a workpiece by electric spark discharges | |
| GB382498A (en) | Improvements in or relating to electromagnetically operated reciprocating devices such as electric hammers | |
| GB762097A (en) | Improvements in and relating to ignition systems | |
| GB589037A (en) | Improvements relating to electric lighting systems | |
| US2561734A (en) | Trigger circuit | |
| GB854172A (en) | Improvements in or relating to electric arc-welding installations | |
| GB582850A (en) | Improvements in and relating to pulse generating systems | |
| US2583158A (en) | Subsynchronous intermittentvoltage apparatus | |
| GB776003A (en) | Improvements in or relating to circuits for generating high unidirectional voltages | |
| GB825088A (en) | Improvements in or relating to systems for electromagnetically rapping electrodes of an electrostatic precipitator | |
| GB1059796A (en) | Improvements in or relating to transistor circuitarrangements for producing a sawtooth current through a deflection coil | |
| GB900324A (en) | Electric-discharge system | |
| GB901437A (en) | Improvements relating to test apparatus for testing electrical rectifier valves | |
| GB629504A (en) | Improvements relating to apparatus for discriminating between electrical pulses |