On the appeal of this case we decided that a judgment of the trial court must be reversed.
We have concluded that the motion of appellant should be overruled.
When the mandate of an appellate court is filed in the lower court, that court reacquires the jurisdiction which it lost by the taking of the appeal. United States v. Howe, 2 Cir.,
We do not believe that the withdrawal of the counterclaim during the original trial should change this rule. The Federal Rules of Civil Procedure, upon which the Municipal Court rules are modeled, were designed to allow amendments and changes in pleadings liberally; pleadings are to be liberally construed to do substantial justice; inconsistent claims and defenses are allowed; disposition of litigation in one action is to be encouraged; the trial court is allowed wide discretion in determining such matters.
The question naturally arises whether the reinstatement of a counterclaim after its withdrawal is so inconsistent as to be prejudicial to the rights of appellant. In 19 Am.Jur., Estoppel, § 79, it is stated that “ * * * it is only on questions of fact, with few exceptions, that one can estop himself by pleading.” To create an estoppel by inconsistent legal positions, the usual essentials are: clearly inconsistent positions; the prior position must have been successfully maintained; the cause must have gone.to judgment; the opposing party must haven been misled and have changed his position in reliance thereon and to his detriment. 19 Am.Jur., Estoppel,. § 73.
Here-the withdrawal of the counterclaim was voluntary, and it is clear that appellant did. not change his position -to his detriment in reliance thereon. There is little doubt that had appellees not filed a counterclaim during the first trial they would not now be precluded from doing so. Defenses not made on first trial may be entertained upon retrial following a reversal. Chase v. United States,
Appellant argues in the present case that an application for consideration of a counterclaim can not come after the case has once been tried, but no authority is cited for that position. However, authority is available evidencing the liberal attitude towards amendments, particularly since the adoption of the Federal Rules of Civil Procedure. Thus amendment of pleadings is within the trial court’s sound discretion, exercised consistent with accepted legal principles. United States v. A. H. Fischer Lumber Co., 4 Cir.,
We conclude that the action taken by the trial court was clearly within its discretion because the withdrawal of the counterclaim during the first trial was not prejudicial to appellant, because it could now be allowed in the trial court’s discretion had it never before been pleaded and thus, since appellant has not changed its position in reliance upon the withdrawal of the counterclaim it is not an injustice to cause it to meet the counterclaim at a second trial.
The motion is overruled.
