Abstract: A compact air filtering device for filtering room air in the home or work environment constructed of a minimum number of unitary structural elements is disclosed, the device having a fan for drawing air through the device encased in detachably interlocked upper and lower enclosure members, one filter positioned on the upper fan enclosure member, and a housing detachably interlocked with the lower fan enclosure member enclosing the filter and the upper fan enclosure member. The device is adapted to receive additional filters identical in construction to the first filter by the addition of an intermediate housing member which increases the internal space within the device without any modification to any of the elements of the device.

Abstract: An improved portable mechanical roller measure device for moving forwardly along a surface and thereby measuring a distance there along. The device comprises a housing which supports a rotatable wheel or roller. The rotation of the roller is transmitted through a simple symmetrical straight-toothed gear arrangement to a counter mechanism, which indicates the distance over which the device has traveled along the surface being measured. The roller measure device may be used in a hand-held fashion or may be connected to an elongated handle. The handle has an attachment section for detachably connecting to exterior attachment sections at either the rear or front of the housing so the device can either be pushed or pulled in its forward measuring direction.

Abstract: A relatively low-power egg beating device for scrambling an egg within its shell. The device includes an improved smoothly curved axially offset needle which is rotated by a motor. The configuration of the needle permits effective beating at relatively low RPMs. The motor is normally off, and in addition, a brake limits rotation of the axially offset needle to facilitate the user grasping the egg shell and impaling it upon the needle. As the egg is fully impaled on the needle, the shell engages and moves a control member which automatically turns on the motor and releases the brake. As the user holds the shell, the needle rotates to beat the egg within the shell. When the user then begins to withdraw the egg shell from the needle, the shell disengages from the control member which automatically turns the motor off and reengages the brake. This permits ready removal of the egg from the stopped needle. Because of its low power requirements the device may be battery powered, fully self-contained and portable.