Magnet Or Solenoid Patents (Class 227/131)
  • Patent number: 4121745
    Abstract: An electro-mechanical impact device, useful for driving nails, staples and other fastening elements. The driving member is driven by frictional engagement between a pair of counter-rotating high speed flywheels. The device has a safety provision whereby it cannot be actuated until the nose of the device is pressed against a work piece. This action also produces a movement of one of the flywheels toward the other. Actuation of the trigger moves the driving member into engagement between the counter-rotating flywheels, and these propel the driving element in a fastener driving direction. The inertia of the movable flywheel aids in efficient engagement of the flywheels with the driving member, and the movable flywheel is provided with a leaf spring permitting it to yield so that the driving member can pass between the flywheels while maintaining frictional engagement between the flywheels and the driving member.
    Type: Grant
    Filed: June 28, 1977
    Date of Patent: October 24, 1978
    Assignee: Senco Products, Inc.
    Inventors: James E. Smith, Carl T. Becht
  • Patent number: 4108345
    Abstract: An electromagnetic stapler having a staple driving circuit with an actuating switch, and having a levered trigger which is depressed by the user so that the lever actuates the switch, whereinafter actuation, a moving element of staple driving mechanism strikes the lever causing disengagement of the lever from the switch so that only one shot is permissible unless and until the trigger is again depressed. The trigger is useful in mechanically providing a safety one shot control for a conventional stapler having a continuous repetitive electrical driving circuit, and the trigger is readily mounted with a conventional stapler. The stapler is provided with a one shot action as aforesaid, whereas in the second position there is a repetitive driving action with the trigger depressed.
    Type: Grant
    Filed: June 16, 1977
    Date of Patent: August 22, 1978
    Inventor: George Frank Manganaro
  • Patent number: 4042036
    Abstract: This invention relates to an electric impact tool characterized by a pair of electric motor-driven counterrotating flywheels, at least one of which is movable relative to the other from a retracted inoperative position into an extended operative one closely adjacent the other flywheel whereby a ram is squeezed therebetween and impelled forward at high speed against a workpiece. The nosepiece of the tool frame is retractable although normally extended due to the spring bias urging it and the movable flywheel to which it is mechanically linked into disengaged position. These elements cooperate with one another and with a manually-actuated trigger such that the latter must be depressed and the nosepiece retracted in order to engage the high energy friction clutch defined by the flywheels so as to operate the ram. A flywheel speed control is provided for matching the ram impact to the workload.
    Type: Grant
    Filed: May 23, 1975
    Date of Patent: August 16, 1977
    Inventors: James E. Smith, James D. Cunningham
  • Patent number: 4033500
    Abstract: An electromagnetic stapler having a staple driving circuit with an actuating switch, and having a levered trigger which is depressed by the user so that the lever actuates the switch, whereinafter actuation, a moving element of staple driving mechanism strikes the lever causing disengagement of the lever from the switch so that only one shot is permissible unless and until the trigger is again depressed. The trigger is useful in mechanically providing a safety one shot control for a conventional stapler having a continuous repetitive electrical driving circuit, and the trigger is readily mounted with a conventional stapler. A stapler may alternatively house a trigger permitting a continuous repetitive staple drive, or the trigger of the present invention which provides a one shot staple drive.
    Type: Grant
    Filed: March 26, 1976
    Date of Patent: July 5, 1977
    Assignee: Electro-Matic Staplers, Inc.
    Inventor: George Frank Manganaro
  • Patent number: 4030656
    Abstract: An electromagnetic power device for moving the operating rod of a stapler or the like having a driving head pivotally mounted on a support member for movement toward an anvil, including plunger means mounted on the support member for linear movement through an advancing stroke from a first inoperative position to a second position for advancing the head and through a driving stroke from the second position toward a third position for driving the staple. Advancing coil means are provided for moving the plunger means from the first position to the second position and driving coil means are provided for moving the plunger means from the second position toward the third position. Circuit means are provided including a foot switch having sequentially operable switch means, the switch means having a normal switch position and sequentially operable advancing and driving switch positions for energizing first the advancing coil and thereafter the driving coil.
    Type: Grant
    Filed: August 9, 1976
    Date of Patent: June 21, 1977
    Assignee: Acme Staple Company, Inc.
    Inventor: Stanley H. Gordon
  • Patent number: 4005812
    Abstract: An electric fastener driving tool includes a body of clamshell construction formed of two, similar, molded plastic body parts. The body includes a head portion and a handle portion, and a magazine for supplying fasteners to be driven is supported by the base of the head portion and by the handle. Walls and projections integral with the body parts define a solenoid chamber within the head cavity and support a switch and circuit board within the handle. The body is held in assembled condition and the magazine is attached to the body by bolts of equal length. A solenoid with a central axial opening is mounted in the solenoid chamber. An armature formed of magnetic and nonmagnetic, electrically insulated segments is slidably mounted in the axial solenoid opening. A spring contacting an integral body wall and the insulating armature segment biases the armature in the return direction.
    Type: Grant
    Filed: June 4, 1975
    Date of Patent: February 1, 1977
    Assignee: Duo-Fast Corporation
    Inventors: Richard H. Doyle, Salvatore L. Morabito, Andrew I. Yohana, Raymond F. Novak
  • Patent number: 3982678
    Abstract: An apparatus for driving nails having an electrical power unit removably connected to a nail holding cartridge is disclosed. The power unit has an electric motor which drives a geared cylinder or drum. Gears on the drum intermesh with an elongated driven member having a nail engaging portion on one end thereof and being controlled in its longitudinal movement ultimately by the movment of the motor and directly by the geared drum. A barrel attached to the nail cartridge is adapted to receive nails, one at a time, from an automatic nail feeding mechanism also located in the nail cartridge. A nail holding mechanism disposed within the barrel insures that the nail is held straight throughout the nail driving operation. A nail countersinking attachment is provided for countersinking nails a predetermined distance into a nail driving material. Also, an extension attachment is provided to allow nails to be driven less than completely into a nail driving material by a predetermined amount.
    Type: Grant
    Filed: February 14, 1975
    Date of Patent: September 28, 1976
    Inventor: Jerome A. Olson
  • Patent number: RE29354
    Abstract: An automatic nailing device employs a cartridge of nails which are supplied in series beneath a spring driven hammer. An electric motor charges the spring-driven hammer after each operation.
    Type: Grant
    Filed: May 13, 1976
    Date of Patent: August 16, 1977
    Assignee: Electro-Speed Tool Corporation
    Inventor: Bruce Malkin