Abstract: An adjustable, duplex receptacle containing two female receptacles and three separate electrical contacts. The first such electrical contact contains a first terminal, a first terminal screw, and a first contact plate. The second such electrical contact contains a second terminal, a second terminal screw, and a second contact plate. The third such contact contains a third terminal and a movable contact assembly. By means of a simple manual adjustment, one may change the wiring of the receptacle of this invention so that one of its outlets is converted from direct contact with a constantly hot, positive line to electrical contact with either an external switch or a secondary source of power.

Abstract: An adjustable duplex receptacle which contains four bus bars is disclosed. One of the bus bars is attached to a spring-loaded leg which, with the use of an adjustable, rotatable pin, can be caused to contact either of two of the other bus bars. The pin may be locked into one position by means of a locking mechanism.

Abstract: An automatic trailer hitch for use with a draft vehicle is disclosed. This hitch contains devices for attaching its two ends to a trailer and to a vehicle for towing the trailer. When the hitch is being connected to the vehicles, it may be extended in length; the presence of at least two telescoping members in the hitch allows such extension. Once the hitch has been connected to the vehicles, the towing vehicle may be backed towards the draft vehicle, thereby contracting the length of the hitch. A locking mechanism, comprised of a spring-loaded pawl, locks the hitch into its contracted position once it has reached a certain specified minimum length.