Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 4204723 | Safety plug clip A safety plug clip adapted to be inserted through bores in the ends of line cord plug blades includes a pair of normally diverging legs resiliently connected to each other and two oppositely faced lock surfaces such that the legs may be pushed together su... | 05/27/1980 |
| 4143933 | Safety sleeve for attachment to the prong of an electrical connector and key for its removal A sleeve having a central channel for receiving a prong of an electrical connector and preventing use of the connector is provided. A locking stud in the form of a projection extends on a flexible arm into the channel. Upon insertion of the prong in the c... | 03/13/1979 |
| 4053705 | Terminal cap A one-piece dielectric terminal cap having a generally rectangular tapered bore with a wide mouth opening for accepting a distorted two prong edge-to-edge terminal and restoring it substantially to its initial position. The cap also includes means for pro... | 10/11/1977 |
| 4030795 | Locking device for electrical plugs A locking device for male electrical plugs and which includes a body member with slots receptive of the contact making terminals of the electrical plug, first means in the body member projecting into the slots to engage and hold the body member to the con... | 06/21/1977 |
| 4025140 | Locking device for the prongs of an electrical plug In one embodiment a protective housing adapted to be locked upon and cover a prong of an electrical plug is disclosed. The housing has a chamber to receive a prong of the plug and has a collared recess and threaded bore on one side communicating with the ... | 05/24/1977 |
