| 摘要 |
<p>The Parent Patent described an electrical hotplate for use in the evapn. of insecticides, embedded in cellulose. This hotplate is now totally enclosed in heat resistant insulating material and has two contact pins. These are pushed into sockets at the inner ends of the plug connector pins of the device which are insulated from the rest of the housing. This simplifies the exchange of a hotplate and makes the operation safe. The hotplate requires no other retention devices which simplifies the manufacture and the assembly.</p> |
