JOSEPH G KELLER
Vehicle Board in Harrisburg, PA

4158745, Jun 19, 1979

Oct 27, 1977

5/846052

Joseph R. Keller - Harrisburg PA

AMP Incorporated - Harrisburg PA

H01L 2448

174 52FP

A continuous strip of stamped and formed lead frames for a semi-conductor chip comprises a continuous carrier strip having three laterally extending arms integral therewith. One of the arms has a chip receiving surface to which the chip is soldered. The other arms have reversely bent end portions which extend over the chip receiving surface and which are intended to be connected to contact areas on the upwardly facing surface of the chip. Each of the arms has an integral terminal member extending therefrom in the plane of the strip and these terminal members are later bent upwardly relative to the plane of the strip so that they surround the chip receiving surface. The terminal members may comprise rectangular tabs formed by folding the stock metal of the strip and dimensioned to receive complementary contact terminals on the ends of wires thereby to connect the contact areas of the chip to external circuitry.

4339768, Jul 13, 1982

Jan 18, 1980

6/113159

Joseph R. Keller - Harrisburg PA
Billy E. Olsson - New Cumberland PA

AMP Incorporated - Harrisburg PA

H01L 2328, H01L 2348, H01L 2302

357 72

An improved transistor, an improved lead frame for use in transistor manufacture, and manufacturing methods for transistors are disclosed. The improved transistor lead frame has a premolded housing thereon which covers a substantial portion of the chip-mounting surface of the transistor heat sink. A chip-receiving cavity is provided in the molded housing which extends to the chip-receiving surface and conforms to the shape of the chip. Solder-receiving bays or bins extend laterally from the cavity to receive excess solder during bonding of the chip to the lead frame. The premolded housing surrounds the chip after it is bonded to the lead frame and when the conductors from the transistor leads to the chip are bonded in place, the housing protects these leads during subsequent handling. The hollow interior of the housing is filled with a silicone gel which encapsulates the conductors in the housing and a harder insulating material, such as epoxy, is applied over the gel.

4359620, Nov 16, 1982

Dec 17, 1979

6/104254

Joseph R. Keller - Harrisburg PA

AMP Incorporated - Harrisburg PA

H05B 610, H05B 640

219 1073

An induction heating apparatus for heating an electrically conductive workpiece, comprising a C-shaped core made of a material having a high magnetic permeability and having two closely opposed tapered ends, an exciting coil surrounding the core, and a circuit for supplying a periodic voltage to the coil so as to cause a varying magnetic field to be produced in the core and to efficiently focus a field of high flux density between its two ends. In one embodiment the core is made of ferrite, a capacitance is connected with the exciting coil to form a resonant circuit, and circuitry is provided for detecting the phase of the current flowing in the resonant circuit and for controlling the frequency and phase of the periodic voltage supplied to the resonant circuit so as to maintain the circuit in resonance. In other embodiments, one of the two ends of the core is mounted on a slidable ram portion, which can be moved toward and away from the other end of the core, and electrically insulating workholders can be mounted on each end of the core to hold a workpiece in place as the ends of the core are pushed toward each other.

4654580, Mar 31, 1987

Jun 18, 1984

6/621631

Joseph R. Keller - Harrisburg PA

AMP Incorporated - Harrisburg PA

G01R 3102, B23P 2100

324 51

Electrical continuity between an electrical terminal and a metal core of an insulated electrical lead is tested for, by supplying substantially identical oscillatory signals to the arms of a two-arm bridge circuit, the arms of which are connected to respective inlets of a differential amplifier, the arms being grounded through capacitances and a ground plane existing in the vicinity of the lead. If there is electrical continuity between the terminal and said core, the capacitance between the core and the ground plane causes imbalance between the signal inputs that are applied by the bridge circuit to the differential amplifier to cause it to emit a continuity success signal.

4767298, Aug 30, 1988

Dec 22, 1986

6/945434

Keith A. Bocchicchio - Middletown PA
David L. Hall - Hummelstown PA
Mark F. Jackson - Harrisburg PA
Joseph R. Keller - Harrisburg PA
Karl H. Letsch - Wyomissing PA

AMP Incorporated - Harrisburg PA

B29C 6502

425112

An apparatus for heat staking plastic parts to other parts to form an assembly are featured, using multiple heating elements which are arranged in zones and which are separately programmable in terms of temperature and displacement to develop optimum deformation of plastic having different characteristics. The heating elements are isolated thermally to provide an improved conservation of heat energy.

4734651, Mar 29, 1988

Jun 30, 1986

6/880268

Joseph R. Keller - Harrisburg PA
Michael D. Strong - Annville PA

AMP Incorporated - Harrisburg PA

G01R 3104

324538

Electrical continuity between the terminals of a multi-contact electrical connector and the cores of insulated leads that have been connected thereto, is tested for by engaging a respective electrical test probe with each of the terminals and using a multiplexer to connect each test probe in turn to a continuity testing circuit, under the control of a computer. Following the continuity test, a bank of analog switches also controlled by the computer is used to apply short circuit test electrical potential to energize selected terminals, and the presence of the test potential on adjacent unenergized terminals is tested for by the computer, to detect short circuiting between the terminals.

4696708, Sep 29, 1987

Nov 13, 1985

6/797583

Joseph R. Keller - Harrisburg PA
Bruce C. Longenecker - Harrisburg PA

AMP Incorporated - Harrisburg PA

B29C 6508, G01N 2900

156 64

The ultrasonic energy applied to a workpiece to be welded in an ultrasonic welding operation, over a predetermined welding time, is measured by processing the output of a load cell beneath the workpiece to produce a signal voltage for comparison with a predetermined reference voltage corresponding to the accumulated ultrasonic energy that should have been applied to the workpiece during said predetermined time to satisfactorily weld the workpiece. A one-shot timer is started at the commencement of the welding operation. If the comparison reveals that signal voltage has reached the reference voltage before the timer has run out, a success signal is generated to indicate the completion of the welding operation.