Abstract: An improved tripping mechanism for use in a circuit breaker wherein magnetic tripping is responsive to low levels of overcurrent by limiting the depth of engagement of a trip lever of a cradle with respect to the latch engagement tab of the armature. Responsiveness of the magnetic tripping is enhanced by positioning of the magnetic yoke adjacent to the bimetallic member while at the same time being movable with respect to the bimetallic member. Positioning the magnetic member independently of the position of the bimetallic member facilitates having magnetic tripping responsive to low overcurrent conditions while at the same time allowing thermal tripping by movement of the bimetallic member to be fully maintained.

Abstract: A mechanism for moving and supporting a circuit breaker relative to a bus bar arrangement such that the circuit breaker can be engaged and disengaged from the bus bar arrangement. The mechanism functions to engage and disengage the circuit breaker while also preventing engagement and disengagement of the circuit breaker from the bus bar arrangement while the circuit breaker is not tripped. The mechanism can also function to indicate whether or not the circuit breaker is engaged or disengaged with the bus bar arrangement.

Abstract: A circuit breaker has contacts which are engageable as a result of manual operation of a toggle mechanism causing the circuit breaker to close and open when the toggle is in an erect and collapsed condition, respectively. Subsequent opening of the circuit breaker is accomplished by either manual operation or automatic due to a current responsive latch within the toggle mechanism. As a result of a unique movable contact biasing arrangement, more uniform pressure is obtained between the contacts and a wiping action of the contacts is obtained during closing. The movable contact is mounted on a contact member pivoted at its center on a solid pin mounted in the breaker case through an elongated aperture in the contact member. The elongated aperture allows for a limited degree of movement of the contact member transverse to the pivot pin. It is this limited transverse movement which increases the tolerance range by providing overtravel of the movable contact and wiping action of the contacts.

Abstract: A method of coating, locating and maintaining ophthalmic supports of eyewear properly positioned with respect to the eyes and on the bridge of the nose of the wearer. The method comprises the steps of coating selected ones at least of the skin-contacting surfaces of ophthalmic supports of eyewear with a non-toxic pressure-sensitive adhesive, properly positioning the ophthalmic support on the wearer with respect to the eyes and the bridge of the wearer's nose and forming a direct bond between the pressure-sensitive adhesive coated skin-contacting surfaces of the ophthalmic supports and the wearer's skin contacted thereby.

Abstract: A method of discharging particulate material from a hopper which minimizes vibration and impact loading is disclosed. The method provides a centrally located discharge column having a series of discharge openings extending vertically of an annular mass of particulate material in the hopper. The particulate material is discharged from a generally conically shaped, downwardly and inwardly directed, top portion of said mass of particulate material, progressively downwardly, through a choked flow discharge path provided by the interior of the discharge column.

Abstract: A gravity blender that discharges particulate material into a pressurized conveying system is provided with a conduit to substantially alleviate differential pressures between the blend chamber and the interior of the blender supply bin.