Clum Manufacturing Company, Inc.

Bucyrus Erie Company

John G Lawton

Larry J Krubsack

Allen L Handy

Harvey H Cords

Larry S Gallett

Heinz G Britsch

A gear cutting tool has a series of separate cutter inserts removeably clamped to the front ledge of a holder block. Each cutter insert has a forward cutting edge that extends beyond the ledge and a rear positioning portion that includes a central projection extending rearwardly from side faces. The central projection mates with a respective one of a series of parallel tracks formed in the holder block and the rear faces mate with upright front walls at the rear of the ledge on either side of the track. The arrangement precisely locates the cutter insert in the holder block. The holder block may be formed of a single piece or may be built up of identical interlocking block elements.

Gear cutting tool

A solenoid starter switch unit for garden tractors, outboard motors and the like operating in a vibrational environmental has an insulating housing with a coil chamber and an outwardly extending rectangular contact chamber. A coil unit supported in the coil chamber has a magnetic plunger with a contact pin journalled in one end and projecting into the contact chamber. The pin has an intermediate contact ledge and a contact has a flat base abutting the contact ledge. The contact is a winged-shaped strip of constant width substantially corresponding to the ledge and is symmetrically formed with a flat base on an inclined portion connected to an outer flat contact portion parallel to the base. An outer lip projects laterally and inwardly from the contact portion. A clamp nut on the pin has an outer edge engaging an outer portion of the base. Coil leads in one embodiment project through the top housing wall. Terminals are press fitted within receptacles on the top of the bobbin. The coil leads pass through top openings in the bottom and are wound about the terminals and soldered in place. The coil leads in another embodiment extend from the bottom of the bobbin and laterally through recessed guides to a bottom terminal chamber. A bottom coil clamp has a projection between the guides to hold the bottom against rotation and clamp the coil within the housing.

Solenoid switch contact and mounting assembly

A keylock switch has a standard housing and rotary switch unit for two, three, four, five or six terminals. The switch includes an outer housing has a lock section and an inner contact section closed by a back plate with fixed contacts secured thereto. A keylock assembly includes a rotating tube with edge slots and pivoted locking levers which are pivoted to a release position within the tube. A hub extends from the lock section into a contact chamber and forms a bearing wall, on which a contact carrier plate bears. A rotating U-shaped contact is coupled to the plate bottom and includes an integral leaf spring in the center acting between the carrier and a fixed terminal plate. The U-shaped contact includes opposite end contact plates, with one about twice the width of the other to span two adjacent fixed contacts while the shorter plate engages a single fixed contact. A coil spring encircles the hub, with end ears bearing on spaced ends of a circumferentially extended housing tab to stress the coil carrier spring. A spring tab is located between the ears engages an ear to further stress the coil spring after a selected angle and create a reset force. A stop tab on the carrier and housing limit rotation of the carrier. Fixed contact locations are located on the back plate.

Multiple terminal switch apparatus

A low keylock unit includes an electrical switch unit. A pair of laterally spaced locking levers are pivotally mounted within a rotatable lock tube. The tube extends inwardly into a contact carrier rotatably mounted at the inner end of the switch housing for selective rotation thereof. A rotating switch is coupled to the carrier and selectively engages a fixed contact on a back plate closing the housing. Each lever includes a control leg between a key opening and the pivot and a lock leg between the pivot and the switch unit. A resilient element such as a coil spring compressed between the lock legs or an integral cross between the levers, bears the levers with the lock legs engaging locking grooves on the housing wall to prevent rotation of the tube and the switch unit. A flat key inserted into the lock deflects the legs and pivots the levers outwardly to release the lock legs. If the key is too wide, the control legs move outwardly into the grooves and maintain the locked state. An appropriate key has a final position which partially deflects the control legs within the tube and deflects the lock legs within the tube and thereby positions all legs in a release position within the tube. The control legs and the key are shown with mating truncated edge projections on the control legs and recesses on the key to set the release position and resiliently holds the key within the lock.

Growing community of inventors

Milwaukee, WI, United States of America

John G Lawton