Title of Invention

A RAIN GUARD FOR USE ON A LATEX BEARING TREE

Abstract

A rain gLlard for LIse on a 1 atex bearing tree above the rubber tapping zone and the latex collection receptacle thereof, comprises a skirt-member for closely encircling the trunk of the tree, partly or fully, with means for firmly positioning itself thereon to provide an awning for the periphery of the said trunk just above the said tapping zone. A cowl extends oLltl~ardly from the sk i rt-member to overhang the said receptacle, characterised in that the end of the cowl has corner portions of a smooth curvature.

Full Text

This invention relates to a rain guard for use on a latex bearing tree during rubber tapping operations. Rain guards are used on latex bearing trees during the rainy season to prevent rain water from flowing through the tapping zone of the tree and from mixing with the latex, tapped from the trees. The rain guards, once installed on such trees, just before the start of the rainy season, are kept in place until the rainy season is over. Thereafter the rain guards may be removed from place and stowed away until the next rainy season commences. Sometimes, the rain guards are not removed from the trees, even after the rainy season, but retained in place, to generally act as a protective cover over the tapping zone and the latex collection receptacle. The known rain guard comprises a skirt-member for closely encircling the trunk of the latex bearing tree, partly or fully. Means are provided for firmly positioning the skirt member on the trunk to provide an awning for the periphery of the trunk just above the said tapping zone. A cowl extends outwardly from the skirt-member to overhang the receptacle- Tapping operation is done on a latex bearing tree during early hours of the day by a skilled person. The latex obtained by the above process is collected in a receptacle. when the receptacle on each tree gets filled with latex, the latex is collected in a vessel or the receptacle is replaced by a fresh, empty one. However, when the person attending to this job bends down near the tapping zone for carrying out the tapping operation, as well as for collecting the latex or replacing the receptacle, there is every possibility of the pointed corner-portions of the end of the cowl, poking or scratching the hands, eyes or other parts of the face of such person, thereby resulting in avoidable injury to him or to her. This invention therefore proposes a rain guard which is free from the abovementioned defect. The rain guard for use on a latex bearing tree above the rubber tapping zone and the latex collection receptacle thereof, according to this invention, comprises a skirt-member for closely encircling the trunk of the tree, partly or fully, with means for firmly positioning itself thereon to provide an awning for the periphery of the said trunk just above the said tapping zone; and a cowl extending outwardly from the skirt-member to overhang the said receptacle, characterised in that the end of the cowl has corner portions of a smooth curvature. This invention will now be described in further detail by referring to the accompanying drawings, which illustrate in Fig.l one of known forms of the rain guard in plan view Fig.2 illustrates the known rain guard fastened to the trunk of the tree above the rubber tapping zone Fig. 3 illustrates, by way of example and not by way of limitation, an embodiment of this invention Fig. 4 illustrates the embodiment illustrated in Fig.3 fastened to the trunk of the tree above the rubber tapping zone and Fig. 5 illustrates, by way of example and not by way of limitation, another embodiment of this invention. The known rain guard (Figs. 1 and 2) for use above the rubber tapping zone Z and the latex collection receptacle R thereof, has a skirt-member S for closely encircling the trunk T of the tree, partly or fully, with means for firmly positioning itself thereon to provide an awning for the periphery of the said trunk just above the said tapping zone. The cowl C extends outwardly from the skirt-member to overhang the said receptacle. However, the end of the cowl has pointed corner-portions at E, which are likely to scratch or poke the eyes or face (or other parts of the body) of the worker coming into contact with the said corner portions. To obviate this drawback, the rain guard proposed herein does not have pointed corner portions at E of Fig.l. On the other hand, the corner portions E (fig.l) have a smooth curvature (that is, for example, a non-pointed or non-jagged curvature) at Rl (see Figs 3 to 5) to avoid the hazards of being scratched or poked. i1lustrative of the curvatures that can be used are those of an ellipse, a circle and so on. With the proposed rain guard in use, the worker will thus be enabled to carry out the latex tapping operation without risk of any injury. The ends Ml and M2 of the skirt-member S surrounding the trunk of the tree are fastened together or to the said trunk by known means. Since these ends are located away from the tapping zone, there is little possibility of the worker at the tapping zone being injured by the corner-portions R2 of these ends. Nonetheless, such corners—portions, if the need arises, will also be assigned a smooth curvature. The terms and expressions in this specification are of description and not of limitation, since various other embodiments of the rain guard proposed herein are possible without departing from the scope and ambit of this invention. WHAT IS CLAIMED IS: 1. A power system stabilization system including first equipment generating power, second equipment consuming power, and a power system supplying power from said first equipment to said second equipment, said power system stabilization system being provided to stabilize said power system, said power system stabilization system comprising: a rechargeable power supply system (100) including a rechargeable battery (10) and converting direct-current power of said rechargeable battery into alternating-current power and supplying the alternating-current power to said power system; detection means (22-28, 32, 51, 52) for detecting a difference between at least one of a previously set value of active power, a previously set value of reactive power, a reference frequency and a reference voltage of said power system, and a present value thereof; and control means (23, 26, 29, 30, 31) responsive to a result obtained in said detection means, for controlling at least one of active power and reactive power output from said rechargeable power supply system. 2. The power system stabilization system of claim 1, wherein said detection means includes: voltage detection means (51) for detecting a voltage of said power system; current detection means (52) for detecting a current of said power system; voltage deviation detection means (22) for detecting a deviation of a voltage in effect held by said power system from a predetermined voltage to be held by said power system; and reactive power deviation detection means (24) referring the deviation voltage detected by said voltage deviation detection means and the current detected by said current detection means, for detecting a deviation of the present value of reactive power from the previously set value of reactive power. 3. The power system stabilization system of claim 2, wherein said control means includes: means for calculating (23) a required reactive power from at least one of the deviation voltage detected by said voltage deviation detection means and the deviation in reactive power detected by said reactive power deviation detection means; and reactive power control means (30, 31, 40) referring to the required reactive power calculated by said means for calculating a required reactive power, for controlling a reactive power output from said rechargeable power supply system. 4. The power system stabilization system of claim 3, wherein: said detection means includes instantaneous-voltage drop detection means (32) for detecting a drop in instantaneous voltage from the voltage detected by said voltage detection means; and said means for calculating a required reactive power calculates the required reactive power from the drop in instantaneous voltage detected by said instantaneous-voltage drop detection means. 5. The power system stabilization system of claim 2, comprising; voltage detection means (51) for detecting a voltage of said power system; current detection means (52) for detecting a current of said power system; and active power deviation detection means (27) referring to the voltage detected by said voltage detection means and the current detected by said current detection means, for detecting a deviation of the present value of active power from the previously set value of active power. 6. The power system stabilization system of claim 5, wherein: said detection means includes a frequency deviation detection means (25) for detecting a deviation of a frequency in effect held by said power system from a predetermined frequency to be held by said power system; and said control means includes means for calculating (26) a required active power from at least one of the deviation in frequency detected by said frequency deviation detection means and the deviation in active power detected by said active power deviation detection means, and active power control means (26, 30, 31, 40) referring to the required active power calculated by said means for calculating a required active power, for controlling an active power output from said rechargeable power supply system. 7. The power system stabilization system of claim 6, wherein: said detection means further includes phase angle detection means (28) for detecting a phase angle obtained at a connection point; and said means for calculating a required active power calculates the required active power from at least one of the deviation in frequency detected by said frequency deviation detection means, the deviation in active power detected by said active power deviation detection means, and the phase angle detected by said phase angle detection means at the connection point. 8. The power system stabilization system of claim 1, wherein: said rechargeable power supply system includes A-D conversion means (40) for receiving the alternating-current power from said power system, converting the received alternating-current power into direct-current power and charging said buttery with the direct-current power, and for converting the direct-current power of said battery into alternating-current power to supply the alternating-current power to said power system; and said control means controls said A-D conversion means to charge and discharge said battery in response to a fact that a detection result output is received from said detection means. 9. The power system stabilization system of claim 8, wherein said control means refers to said rechargeable battery's efficiency characteristic according to a charging and discharging cycle period to control at least one of active power and reactive power output from said rechargeable power supply system. 10. The power system stabilization system of claim 8, wherein said control means refers to an overload output-output duration characteristic of said rechargeable power supply system to control at least one of active power and reactive power output from said rechargeable power supply system. 11. The power system stabilization system of claim 1, wherein said rechargeable power supply system includes a battery allowing for an overload input and output with a level of power larger than a rated value. 12. The power system stabilization system of claim 1, said second equipment being electric railways equipment, wherein said rechargeable power supply system absorbs regenerative energy attributed to regenerative-breaking of a vehicle of said electric railways equipment. 13. A method of stabilizing a power system via a rechargeable power supply system provided between power generation equipment and power consumer equipment, comprising the steps of: detecting at least one of a deviation of each of a power generating frequency, a voltage, an active power and a reactive power of said power generation equipment, and a phase angle obtained at a connection point; and referring to any said deviation detected, to control at least one of active power and reactive power output from said rechargeable power system, to supply said power consumer equipment with a predetermined power. 14. A power system stabilization system, substantially as hereinabove described and illustrated with reference to the accompanying drawings. 15. A method of stabilizing a power system, substantially as hereinabove described and illustrated with reference to the accompanying drawings.

Documents:

131-mas-2002-abstract.pdf

131-mas-2002-claims filed.pdf

131-mas-2002-claims granted.pdf

131-mas-2002-correspondnece-others.pdf

131-mas-2002-correspondnece-po.pdf

131-mas-2002-description(complete)filed.pdf

131-mas-2002-description(complete)granted.pdf

131-mas-2002-drawings.pdf

131-mas-2002-form 1.pdf

131-mas-2002-form 19.pdf

131-mas-2002-form 26.pdf