GB916319A - Apparatus for electrical-discharge-machining - Google Patents
Apparatus for electrical-discharge-machiningInfo
- Publication number
- GB916319A GB916319A GB4047860A GB4047860A GB916319A GB 916319 A GB916319 A GB 916319A GB 4047860 A GB4047860 A GB 4047860A GB 4047860 A GB4047860 A GB 4047860A GB 916319 A GB916319 A GB 916319A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- resistor
- source
- motor
- transistors
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
916,319. Control of D.C. motors. ELOX CORPORATION. Nov. 24, 1960, No. 40478/60. Class 38 (3). [Also in Groups XXII, XXIX and XXXVI] In a control arrangement for a separately excited motor 42 positioning an electrode 10, Fig. 5, of an erosive spark discharge device, the direction of rotation and speed of the motor is controlled by the difference between the voltage drop across a resistor 48 in the anode circuit of a pentode 40 and the voltage of a source 46. In a modification, Fig. 6, the voltage across an anode resistor 70 is opposed by a source 74 in the base to emitter circuits of transistors 62, 64 of PNP and NPN type, respectively, connected in parallel. When the voltage across the resistor 70 equals the voltage of the source 74 both transistors are non-conductive and the motor is stationary. An increase of voltage across the resistor 70 causes a point 72 to become negative and transistor 62 will be rendered conductive to connect a source 66 to the motor 42 to cause downward feed of the electrode. Conversely, a reduction in the voltage across the resistor 70 causes the transistor 64 to conduct so as to connect a source 68 to the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4047860A GB916319A (en) | 1960-11-24 | 1960-11-24 | Apparatus for electrical-discharge-machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4047860A GB916319A (en) | 1960-11-24 | 1960-11-24 | Apparatus for electrical-discharge-machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB916319A true GB916319A (en) | 1963-01-23 |
Family
ID=10415098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4047860A Expired GB916319A (en) | 1960-11-24 | 1960-11-24 | Apparatus for electrical-discharge-machining |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB916319A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998036480A1 (en) * | 1997-02-12 | 1998-08-20 | Abb Ab | Substation |
-
1960
- 1960-11-24 GB GB4047860A patent/GB916319A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998036480A1 (en) * | 1997-02-12 | 1998-08-20 | Abb Ab | Substation |
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