GB722673A - Improvements in or relating to engine indicators - Google Patents
Improvements in or relating to engine indicatorsInfo
- Publication number
- GB722673A GB722673A GB302953A GB302953A GB722673A GB 722673 A GB722673 A GB 722673A GB 302953 A GB302953 A GB 302953A GB 302953 A GB302953 A GB 302953A GB 722673 A GB722673 A GB 722673A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- circuit
- pulse
- divide
- positive pulse
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Audible And Visible Signals (AREA)
Abstract
722,673. Engine-indicators. STANDARD TELEPHONES & CABLES, Ltd. Feb. 3, 1953, No. 3029/53. Addition to 693,950. Class 106.(2). An engine indicator as claimed in Claim 1 of the parent Specification is modified by the addition of means to invert the negative pulses coming from the " divide-by-two " circuit so that corresponding positive pulses are obtained for operating the gas-filled tube in the time-base. The original coupling circuit between the anodes of the " divide-by-two " circuit V2a, V2b, and the gas-filled tube V3 is shown in Fig. 1 and is made via the third bank SIC of a selector switch. In the parent Specification the smaller positive pulse coming from V2a or V2b was used for triggering the tube V3, and a larger and more reliable negative pulse was not employed because its polarity was not suitable for triggering the tube V3 direct. The modified circuit shown in Fig. 2 includes a transformer T1 so connected between the " divide-by-two " circuit and the tube V3 that the large negative pulse is reversed in polarity and is applied as a positive pulse to V3 control grid, the smaller positive pulse no longer being employed for this purpose. Fig. 3 shows a further modification in which the reversal of the pulse sign is effected by a choke Ll which resonates with its selfcapacitance causing a large enough overshoot on the second half-cycle to produce a positive pulse to fire the tube V3. A condenser C is added so as to provide a low-impedance path to the ground line E from the earth end of the inductance L1. An additional switch bank SID is provided in either modification to provide a free-running position for the grid of V3 as shown at position 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB302953A GB722673A (en) | 1953-02-03 | 1953-02-03 | Improvements in or relating to engine indicators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB302953A GB722673A (en) | 1953-02-03 | 1953-02-03 | Improvements in or relating to engine indicators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB722673A true GB722673A (en) | 1955-01-26 |
Family
ID=9750618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB302953A Expired GB722673A (en) | 1953-02-03 | 1953-02-03 | Improvements in or relating to engine indicators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB722673A (en) |
-
1953
- 1953-02-03 GB GB302953A patent/GB722673A/en not_active Expired
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