JPH0340343Y2 - - Google Patents
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- Publication number
- JPH0340343Y2 JPH0340343Y2 JP12616187U JP12616187U JPH0340343Y2 JP H0340343 Y2 JPH0340343 Y2 JP H0340343Y2 JP 12616187 U JP12616187 U JP 12616187U JP 12616187 U JP12616187 U JP 12616187U JP H0340343 Y2 JPH0340343 Y2 JP H0340343Y2
- Authority
- JP
- Japan
- Prior art keywords
- outer cylinder
- inner cylinder
- equilibrium
- cylinder
- instrument
- 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
- 239000000126 substance Substances 0.000 claims description 15
- 238000002474 experimental method Methods 0.000 claims description 11
- 239000012780 transparent material Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 13
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 12
- WFPZPJSADLPSON-UHFFFAOYSA-N dinitrogen tetraoxide Chemical compound [O-][N+](=O)[N+]([O-])=O WFPZPJSADLPSON-UHFFFAOYSA-N 0.000 description 12
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Devices For Use In Laboratory Experiments (AREA)
Description
〔産業上の利用分野〕
本考案は化学実験用器具に関し、詳しくは、平
衡反応、沈澱反応等の化学反応の観察用及び測定
用に使用される化学実験用器具に関する。
〔従来の技術及び発明が解決しようとする問題
点〕
近年学校の化学実験教材として化学平衡の観察
が行われている。例えば、二酸化窒素と四酸化二
窒素の平衡を観察するため、二酸化窒素の気体を
密閉し、これを圧縮することにより二酸化窒素か
ら四酸化二窒素方向への平衡移動が行われ、それ
に伴い二酸化窒素の赤褐色が多少薄くなるのが観
察でき平衡移動が起こつたことを確認できる。従
来、この様な化学平衡の観察には注射器を改造し
た器具が使用されており、注射器の針の部分を密
閉し内部に気体を密閉して内筒を押圧することに
より圧縮し注射器の側面から変化を観察してい
る。
しかしながら、従来のこの種器具による観察で
は、平衡移動の前の圧縮による気体濃度の変化に
よる色の変化が観察され、その後平衡移動による
色の変化が観察される為、正確な化学平衡の観察
が行えない問題点が存在していた。
上記問題は従来の器具が側面から観察する為、
気体濃度の変器に伴う色の変化が観察された後、
平衡移動による色の変化が観察されるものであ
る。この種器具においては器具の縦方向からの観
察を行えば圧縮によるガス濃度が変化すると伴に
光の透過距離の変化が生じる為濃度変化に伴う色
の変化を観察することなく平衡移動の色の変化が
観察できるものである。
しかしながら、従来の器具では縦方向の観察に
より上記平衡移動の色の変化を確認することは不
可能であつた。
本考案は、上記従来技術の欠点を解消したもの
で、化学平衡の目視観察及び光電比色計等による
測定を正確に行うことができる化学実験用器具を
提供することを目的とするものである。
〔問題点を解決するための手段〕
本考案者は上記の欠点に鑑み研究した結果、外
筒の底部及び内筒の上部及び底部をフラツトに構
成することにより上記課題を解決することを見出
し本考案を完成した。
本考案化学実験用器具は上記課題を解決するた
め、側壁底部の少なくとも１個所に内部と連通す
る管が連設され上部が開口された外筒と、該外筒
の前記開口された上部から挿入され外筒の内側面
に密閉性を有しつつ摺動自在に嵌合され少なくと
も底部を有する内筒とから構成され、上記外筒に
連通された管には密閉性付与のための栓が設けら
れ、少なくとも上記外筒の底部及び内筒の上部及
び底部が透明性を有する材質にて構成され、上記
外筒の底部及び内筒の上部及び底部がフラツトに
構成されてなるものである。
〔実施例〕
以下、本考案の実施例を図面を参照して詳細に
説明する。
第１図は本考案化学実験用器具の一実施例を示
すもので、図中１は化学実験用器具を示す。該器
具１は外筒２及び内筒３とから構成されている。
外筒２の上部４は開口され、側壁底部５には外筒
２の内部と連通する管６が設けられており、該管
６には栓７が設けられている。又、外筒２の底部
８はフラツトに構成されている。ここでいうフラ
ツトとは底部全体がフラツトであることを意味す
るものであり、外筒の内底面がフラツトであり外
底面がフラツトでない場合、或いはその逆の場合
では本考案の目的を達成することはできない。
内筒３は外筒２の開口された上部４から挿入さ
れ、外筒２の内側面９に密閉性を有しつつ摺動自
在に設けられたものであり、密閉性を得る為本実
施例では二本のＯリング１０，１０が内筒３の適
宜の個所に装着されている。各Ｏリング１０，１
０の装着は内筒３の外周面に溝１１，１１を設
け、各溝１１，１１にＯリング１０，１０を嵌込
むことによつて装着することができる。又、内筒
３の底部１２は外筒２の底部８と同様フラツトに
構成されており、上部は開口型に成つている。
外筒２及び内筒３は透明性を有する耐熱ガラス
で構成されており、この様なガラスとして硼珪酸
系の耐熱ガラス（商品名：パイレツクス）が特に
好ましく使用される。
上記の様に構成される器具１を使用する場合を
二酸化窒素と四酸化二窒素の平衡を観察する場合
について説明する。
外筒２に連設された管６の端部１３より所定量
の二酸化窒素ガスを外筒２内部へ導入した後栓７
を閉じガスを密閉する。この際外筒２内部は二酸
化窒素ガスの赤褐色を呈している。次に内筒３を
押圧しつつ器具１の上方から（矢印Ａ方向）から
内部を観察する。内筒３を押圧することによりガ
スが圧縮され、二酸化窒素から四酸化二窒素への
平衡移動が起こり、それに伴つて二酸化窒素の赤
褐色が四酸化二窒素のがやや増加することで赤褐
色が薄くなる状態を観察することができる。この
際、器具１の観察者の視線上にある内筒底部１２
及び外筒底部８がフラツトに構成されているた
め、平衡移動に伴う色の変化をはつきりと確認す
ることができる。又、該器具１は器具上方から観
察が行えるために圧縮によつて二酸化窒素の濃度
変化により赤褐色が濃い赤褐色を呈する状態を観
察することなく平衡移動による赤褐色→薄い褐色
の変化のみを観察することができるため、平衡移
動の正しい知識を認識できる。
又、ルツクスメーターやホトメーターを使用し
て圧力による平衡移動を定量的に測定することも
可能である。例えば、第３図に示す如く、載置さ
れたルツクスメーター１３の上方に器具１を固定
し、上方から適当な光源によつて光１４を与える
ことにより加圧状態における変化の様子をルツク
スメーターの表示によつて示すことができる。第
３図では器具１の上部が下側になる様に固定され
ているがこの逆であつても測定は可能である。
尚、上記実施例では外筒の側壁底部に一箇所内
部と連通する管が設けられているが、これに限ら
れず、第２図に示す如く二箇所に内部と連通する
管６，６を設けることも可能であり、更に必要に
応じて三箇所以上に設けることも可能である。
管が二箇所に設けてある場合はガスの導入及び
外筒内部の空気の排気が同時に行えるため容易に
しかも空気の混ざらないガスを内部に密閉するこ
とが可能となる。
又、管に設けられる栓は第１図に示される様な
ものに限らず第２図に示す様なクリツプ状の栓７
でも良く、要は内部に導入されたガス等を密閉す
ることができるものであればどの様な栓であつて
も使用可能である。
更に、内筒の上部は上記実施例では開口型とな
つているが、これに限られず、上部が存在してい
ても良い。但し、この場合上部は透明性を有し、
且つフラツトに構成される必要がある。
又、上記実施例では内筒と外筒の密閉性を付与
するためＯリングを使用しているが、これに限定
されるものではなく、内筒外側面及び外筒内側面
をスリガラスにし両者間にシリコン等を介在させ
て密閉性を付与することも可能であり、その他密
閉性が付与できればどの様な構成も可能である。
又、上記実施例では二酸化窒素と四酸化二窒素
の平衡を観察する場合について説明したが、これ
に限られず、他の平衡系の観察にも使用できる。
本考案器具は上記した平衡反応の観察の他、沈
澱反応の観察にも利用できる。
例えば、
Naclaq＋CO2＋NH3
→NaHCO3↓＋NH4cl
の沈澱反応を観察する場合等に利用できる。この
場合単に塩化ナトリウム水溶液と炭酸ガス、アン
モニアガスを接触させただけでは反応は進まず、
加圧することにより反応が進行する為、本考案器
具を用いればこの沈澱反応がつぶさに観察でき
る。
以下、具体的実施例及び比較例を挙げて本考案
器具と従来の注射器を改造した器具とを比較検討
した結果を示す。
実施例 １
第１図に示す様な本考案器具１（外筒の内径が
15mm）の管６の端部１３より空気を30m導入し
た後栓をし器具内に密閉する。しかる後、第３図
に示す如くルツクメーターの載置された上方に器
具１を固定し上方から平行光源装置より発せられ
る透過光をルツクメーター１３により測定した。
又、器具１の内筒を押圧して器具１の内部が15m
となる迄圧縮した際の透過光を測定した。結果
を第１表に示す。
比較例 １
実施例１において本考案器具１の代わりに従来
使用されている注射器を改造した器具（外筒の内
径が15mm）を使用した以外は全く同様に透過光を
測定した。結果を第１表に併せて示す。
[Industrial Application Field] The present invention relates to a chemical experiment instrument, and more particularly to a chemical experiment instrument used for observing and measuring chemical reactions such as equilibrium reactions and precipitation reactions. [Problems to be solved by the prior art and the invention] In recent years, observation of chemical equilibrium has been used as a teaching material for chemical experiments in schools. For example, in order to observe the equilibrium between nitrogen dioxide and dinitrogen tetroxide, nitrogen dioxide gas is sealed and compressed, resulting in an equilibrium shift from nitrogen dioxide to dinitrogen tetroxide. It can be observed that the reddish-brown color becomes slightly lighter, confirming that an equilibrium shift has occurred. Conventionally, a device modified from a syringe has been used to observe such chemical equilibrium.The needle of the syringe is sealed, gas is sealed inside, and the inner cylinder is compressed by pressing, and the air is released from the side of the syringe. observing changes. However, in conventional observation using this type of instrument, a color change is observed due to a change in gas concentration due to compression before equilibrium movement, and then a color change due to equilibrium movement is observed, making accurate observation of chemical equilibrium difficult. There was a problem that made it impossible. The above problem occurs because conventional instruments observe from the side.
After a change in color is observed with a change in gas concentration,
Color changes due to equilibrium movement are observed. In this type of instrument, if you observe from the vertical direction of the instrument, the light transmission distance will change as the gas concentration changes due to compression, so you will not be able to observe the color change due to the concentration change, and you will be able to see the color of the equilibrium movement. Changes can be observed. However, with conventional instruments, it has been impossible to confirm the color change due to the equilibrium movement by longitudinal observation. The present invention eliminates the drawbacks of the above-mentioned conventional techniques, and aims to provide a chemical experiment instrument that can accurately perform visual observation of chemical equilibrium and measurement using a photoelectric colorimeter, etc. . [Means for Solving the Problems] As a result of research in view of the above drawbacks, the present inventor discovered that the above problems could be solved by configuring the bottom of the outer cylinder and the top and bottom of the inner cylinder to be flat. Completed the idea. In order to solve the above-mentioned problems, the chemical experiment device of the present invention has an outer cylinder with a pipe communicating with the inside connected to the inside at least at one place on the bottom of the side wall and an open upper part, and an outer cylinder that is inserted through the opened upper part of the outer cylinder. and an inner cylinder having at least a bottom portion, which is slidably fitted to the inner surface of the outer cylinder with airtightness, and the pipe communicating with the outer cylinder is provided with a plug for imparting airtightness. At least the bottom of the outer cylinder and the top and bottom of the inner cylinder are made of a transparent material, and the bottom of the outer cylinder and the top and bottom of the inner cylinder are flat. [Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the chemical experiment apparatus of the present invention, and in the figure, numeral 1 indicates the chemical experiment apparatus. The instrument 1 is composed of an outer cylinder 2 and an inner cylinder 3.
The upper part 4 of the outer cylinder 2 is open, and the side wall bottom 5 is provided with a pipe 6 communicating with the inside of the outer cylinder 2, and the pipe 6 is provided with a stopper 7. Further, the bottom portion 8 of the outer cylinder 2 is configured to be flat. Flat here means that the entire bottom is flat, and the purpose of the present invention cannot be achieved if the inner bottom surface of the outer cylinder is flat and the outer bottom surface is not, or vice versa. I can't. The inner cylinder 3 is inserted from the open upper part 4 of the outer cylinder 2, and is slidably provided on the inner surface 9 of the outer cylinder 2 while maintaining airtightness. Here, two O-rings 10, 10 are attached to appropriate locations on the inner cylinder 3. Each O-ring 10,1
0 can be installed by providing grooves 11, 11 on the outer peripheral surface of the inner cylinder 3 and fitting O-rings 10, 10 into each groove 11, 11. Further, the bottom 12 of the inner cylinder 3 is constructed flat like the bottom 8 of the outer cylinder 2, and the upper part is of an open type. The outer cylinder 2 and the inner cylinder 3 are made of transparent heat-resistant glass, and borosilicate-based heat-resistant glass (trade name: Pyrex) is particularly preferably used as such glass. A case will be described in which the apparatus 1 configured as described above is used to observe the equilibrium between nitrogen dioxide and dinitrogen tetroxide. After introducing a predetermined amount of nitrogen dioxide gas into the outer cylinder 2 from the end 13 of the pipe 6 connected to the outer cylinder 2, a plug 7 is installed.
Close and seal the gas. At this time, the inside of the outer cylinder 2 exhibits a reddish-brown color of nitrogen dioxide gas. Next, while pressing the inner cylinder 3, the inside of the instrument 1 is observed from above (in the direction of arrow A). Pressing the inner cylinder 3 compresses the gas, causing an equilibrium shift from nitrogen dioxide to dinitrogen tetroxide, and as a result, the reddish-brown color of nitrogen dioxide becomes lighter as the amount of dinitrogen tetroxide increases slightly. The condition can be observed. At this time, the inner cylinder bottom 12 that is in the line of sight of the observer of the instrument 1
Since the bottom portion 8 of the outer cylinder is configured to be flat, changes in color due to equilibrium movement can be clearly confirmed. In addition, since the instrument 1 can be observed from above, it is possible to observe only the change from reddish brown to light brown due to equilibrium movement, without observing the state in which the reddish brown becomes darker reddish brown due to the change in concentration of nitrogen dioxide due to compression. As a result, the correct knowledge of equilibrium movement can be recognized. It is also possible to quantitatively measure the equilibrium shift due to pressure using a lux meter or photometer. For example, as shown in FIG. 3, by fixing the instrument 1 above the lux meter 13 placed thereon and applying light 14 from above with an appropriate light source, changes in the pressurized state can be observed using the lux meter. This can be indicated by the meter display. In FIG. 3, the instrument 1 is fixed so that the upper part is on the lower side, but measurements can be made even if the upper part is on the lower side. In the above embodiment, a tube communicating with the inside is provided at one location at the bottom of the side wall of the outer cylinder, but the invention is not limited to this, and as shown in FIG. 2, tubes 6, 6 communicating with the interior are provided at two locations. Furthermore, it is also possible to provide three or more locations as necessary. When the pipes are provided in two places, gas can be introduced and air inside the outer cylinder can be exhausted at the same time, making it easy to seal the inside with gas that does not mix with air. Furthermore, the plug provided on the tube is not limited to the one shown in FIG. 1, but may also be a clip-shaped plug 7 as shown in FIG.
In short, any type of plug can be used as long as it can seal the gas introduced inside. Furthermore, although the upper part of the inner cylinder is an open type in the above embodiment, the present invention is not limited to this, and an upper part may exist. However, in this case, the upper part is transparent,
It also needs to be configured flat. In addition, in the above embodiment, an O-ring is used to provide airtightness between the inner cylinder and the outer cylinder, but the invention is not limited to this. It is also possible to provide sealing properties by interposing silicon or the like, and any other configuration is possible as long as it can provide sealing properties. Further, in the above embodiment, the case where the equilibrium between nitrogen dioxide and dinitrogen tetroxide is observed has been described, but the present invention is not limited to this, and can be used to observe other equilibrium systems. The device of the present invention can be used to observe precipitation reactions in addition to observing the equilibrium reactions described above. For example, it can be used to observe the precipitation reaction of Nacl aq + CO 2 + NH 3 → NaHCO 3 ↓ + NH 4 cl. In this case, simply bringing the sodium chloride solution into contact with carbon dioxide gas or ammonia gas will not cause the reaction to proceed.
Since the reaction progresses by applying pressure, this precipitation reaction can be observed in detail using the device of the present invention. Hereinafter, the results of a comparative study between the device of the present invention and a device obtained by modifying a conventional syringe will be shown using specific examples and comparative examples. Example 1 The device 1 of the present invention as shown in Fig. 1 (the inner diameter of the outer cylinder is
After introducing air for 30 m from the end 13 of the 15 mm) tube 6, the device is sealed with a stopper. Thereafter, as shown in FIG. 3, the instrument 1 was fixed above where the lucometer was placed, and the transmitted light emitted from above by the parallel light source device was measured by the lucometer 13.
Also, press the inner cylinder of instrument 1 so that the inside of instrument 1 is 15 m.
The transmitted light was measured when compressed until . The results are shown in Table 1. Comparative Example 1 Transmitted light was measured in exactly the same manner as in Example 1, except that instead of device 1 of the present invention, a device (the inner diameter of the outer cylinder was 15 mm) that was a modified version of a conventionally used syringe was used. The results are also shown in Table 1.
【表】
実施例 ２
実施例１において空気の代わりに二酸化窒素を
導入した以外は実施例１と同様の測定を行つた。
結果を第２表に示す。
比較例 ２
比較例１において空気の代わりに二酸化窒素を
導入した以外は比較例２と同様の測定を行つた。
結果を第２表に併せて示す。[Table] Example 2 Measurements were carried out in the same manner as in Example 1 except that nitrogen dioxide was introduced instead of air.
The results are shown in Table 2. Comparative Example 2 The same measurements as in Comparative Example 2 were performed except that nitrogen dioxide was introduced instead of air in Comparative Example 1.
The results are also shown in Table 2.
以上説明した如く、本考案化学実験用器具は側
壁低部の少なくとも１箇所に内部と連通する管が
連設され上部が開口された外筒と、該外筒の前記
開口された上部から挿入され外筒の内側面に密閉
性を有しつつ摺動自在に嵌合され少なくとも底部
を有する内筒とから構成され、上記外筒に連通さ
れた管には密閉性付与のための栓が設けられ、少
なくとも上記外筒の底部及び内筒の上部及び底部
が透明性を有する材質にて構成され、上記外筒の
底部及び内筒の上部及び底部がフラツトに構成さ
れてなるものであるから、平衡移動の観察が極め
て正確にしかも容易に行える利点がある。
As explained above, the chemical experiment apparatus of the present invention includes an outer cylinder having an open upper part and a pipe communicating with the interior connected to the inside at least at one location in the lower part of the side wall, and an outer cylinder that is inserted through the open upper part of the outer cylinder. It consists of an inner cylinder that is slidably fitted to the inner surface of the outer cylinder and has at least a bottom part, and the pipe that communicates with the outer cylinder is provided with a plug for providing airtightness. , since at least the bottom of the outer cylinder and the top and bottom of the inner cylinder are made of a transparent material, and the bottom of the outer cylinder and the top and bottom of the inner cylinder are flat, there is no balance. It has the advantage that movement can be observed very accurately and easily.
図面は本考案の実施例を示すもので、第１図は
本考案化学実験器具の一実施例を示す縦断面図、
第２図は本考案の他の実施例を示す要部縦断面
図、第３図は本考案器具及びルツクスメーターを
用いて平衡移動による色の変化を観察している状
態を示す説明図である。
１……化学実験用器具、２……外筒、３……内
筒、４……外筒上部、５……側壁低部、６……
管、７……栓、８……外筒底部、９……外筒内側
面、１２……内筒底部。
The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view showing an embodiment of the chemical experiment instrument of the present invention.
Fig. 2 is a vertical cross-sectional view of main parts showing another embodiment of the present invention, and Fig. 3 is an explanatory diagram showing a state in which color changes due to equilibrium movement are observed using the device of the present invention and a lux meter. be. 1... Chemical experiment equipment, 2... Outer cylinder, 3... Inner cylinder, 4... Upper part of outer cylinder, 5... Lower part of side wall, 6...
Pipe, 7... Plug, 8... Outer cylinder bottom, 9... Outer cylinder inner surface, 12... Inner cylinder bottom.
Claims (1)
管が連設され上部が開口された外筒と、該外筒の
前記開口された上部から挿入され外筒の内側面に
密閉性を有しつつ摺動自在に嵌合され少なくとも
底部を有する内筒とから構成され、上記外筒に連
通された管には密閉性付与のための栓が設けら
れ、少なくとも上記外筒の底部及び内筒の上部及
び底部が透明性を有する材質にて構成され、上記
外筒の底部及び内筒の上部及び底部がフラツトに
構成されてなることを特徴とする化学実験器具。 An outer cylinder having an open top and a pipe communicating with the inside connected to at least one part of the bottom of the side wall; an inner cylinder that is movably fitted and has at least a bottom, and a pipe communicating with the outer cylinder is provided with a plug for providing airtightness, and at least the bottom of the outer cylinder, the upper part of the inner cylinder, and A chemical experiment device characterized in that the bottom portion is made of a transparent material, and the bottom portion of the outer cylinder and the top and bottom portions of the inner cylinder are configured to be flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12616187U JPH0340343Y2 (en) | 1987-08-19 | 1987-08-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12616187U JPH0340343Y2 (en) | 1987-08-19 | 1987-08-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6432732U JPS6432732U (en) | 1989-03-01 |
| JPH0340343Y2 true JPH0340343Y2 (en) | 1991-08-26 |
Family
ID=31377424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12616187U Expired JPH0340343Y2 (en) | 1987-08-19 | 1987-08-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0340343Y2 (en) |
-
1987
- 1987-08-19 JP JP12616187U patent/JPH0340343Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6432732U (en) | 1989-03-01 |
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