Arnold G Gulko

US Patent:

45765804, Mar 18, 1986

Filed:

Aug 10, 1984

Appl. No.:

6/639313

Inventors:

Arnold G. Gulko - Silver Spring MD

International Classification:

B63H 1612

US Classification:

440 21

Abstract:

A pedal powered watercraft is disclosed in which a centrally disposed longitudinally extending frame carries a centrally positioned pedal housing having one pedal on each side of said frame with one of a pair of longitudinally extending laterally horizontal boards mounted on each pedal. The frame carries a pair of vertically spaced apart stops constituted by horizontal bars extending outwardly from the frame on each side of the watercraft at the forward end of thereof. The boards extend forwardly of the pedals beyond the bars with these bars being positioned so that the upper bars are below the upper surface of the boards when the pedal carrying the same is at the upper limit of its path of movement, and the lower bars are above the lower surface of the boards when the pedal carrying the same is at the lower limit of its path of movement. This causes the forward end of both boards to point in such a direction that the tilt of both boards moves the craft forwardly when the upper board is depressed.

US Patent:

41019237, Jul 18, 1978

Filed:

Mar 22, 1977

Appl. No.:

5/780287

Inventors:

Arnold G. Gulko - Arlington VA
Jacob H. Steinberg - Arlington VA

International Classification:

H01L 2714

US Classification:

357 30

Abstract:

A solar cell is provided which comprises a layer of crystalline silicon doped with boron on at least one surface thereof and having the other surface doped with vanadium.

US Patent:

40129110, Mar 22, 1977

Filed:

Mar 23, 1976

Appl. No.:

5/669614

Inventors:

Arnold G. Gulko - Silver Spring MD

International Classification:

F03G 302

US Classification:

60531

Abstract:

An engine powered by low boiling liquid and adapted to operate upon partial immersion in a heated liquid, which may be solar heated, is provided by a circular train of tubular compartments in which adjacent compartments are sealed to interconnectors and the train is tied to a central axle so that rotation of the train will rotate the axle. The interconnectors have an opening and a tube extending forwardly into the leading compartment, and one way valves permit rearward movement through the tube while preventing forward movement through the tube, and this allows liquid in the bottom compartment to be pumped rearwardly to a descending compartment to power the engine while liquid in an ascending compartment drains rearwardly to minimize the drag on the engine.