Max J Spendlove
Engineers in Silver Spring, MD

5124520, Jun 23, 1992

Feb 20, 1990

7/482061

Max J. Spendlove - Silver Spring MD

H05B 100

219 50

An electrically conductive work-piece is rapidly heated by establishing a current flow in the work-piece that is the highest it can be without damaging circuit components. Such components include at least a transformer having a high-voltage, low-current primary winding and a low-voltage, high-current secondary winding and insulated cables connected to the secondary winding and terminated in one or more clamps that attach to the workpiece. The cables may be jumper-type cables and the clamps may be alligator-type clamps. Other types of clamps suitable for use with the present invention include a sliding clamp, a hinged clamp, and a wrap-around strap-type clamp. To limit current in the circuit to acceptable levels, it may be necessary to employ one or more resistive electrodes, or heater blocks, placed in the jaws of one or more of the clamps. Intimate thermal contact is established between the heater blocks and the work-piece such that heat generated in the heater blocks is conducted to the work-piece. Heater blocks of different configuration and/or composition are provided to present a range of resistances.

5247157, Sep 21, 1993

May 8, 1992

7/879924

Max J. Spendlove - Silver Spring MD

H05B 100, B23K 300

219234

An apparatus for electrically heating an electrically conductive workpiece by passage of electric current therethrough includes a pair of hinged levers, each having a handle end and a jaw end. The jaw end of each lever is provided with a refractory metal ribbon heater selected from the group consisting of stainless steel, Nichrome, chromel, tungsten, and molydenum. The ribbon has an elongate cross-section and is bent to form a V-shaped contactor for achieving good thermal contact with a workpiece of relatively high conductivity, such as copper, aluminum or brass pipes and fittings. A copper conductor assures good electrical contact between the ends of the metal ribbon heater and the jaw and serves as a positioning block. A bolt and wing nut detachably secure the metal ribbon heater to the jaw.

5282914, Feb 1, 1994

Sep 14, 1992

7/944255

Max J. Spendlove - Silver Spring MD

B31F 500

156227

A releasable fastener, a method of fastening together a number of pieces of paper, and a dispenser carrying a supply of releasable fasteners are disclosed. In a first embodiment, a releasable fastener is disclosed which includes a first portion having front and back oppositely-facing sides which are substantially covered with an adhesive, and a second portion having front and back oppositely-facing sides which are free of adhesive. A releasable fastener dispenser carrying a supply of releasable fasteners is also disclosed which includes a strip of carrier material, and a plurality of releasable fasteners releasably adhered to the strip of carrier material.

5202169, Apr 13, 1993

Jan 23, 1991

7/644971

Max J. Spendlove - Silver Spring MD

B65D 6528

428 43

A releasable fastener, a method of fastening together a number of pieces of paper, and a dispenser carrying a supply of releasable fasteners are disclosed. In a first embodiment, a releasable fastener is disclosed which includes a first portion having front and back oppositely-facing sides which are substantially covered with an adhesive, and a second portion having front and back oppositely-facing sides which ar free of adhesive. A releasable fastener dispenser carrying a supply of releasable fasteners is also disclosed which includes a strip of carrier material, and a plurality of releasable fasteners releasably adhered to the strip of carrier material.