Leeds & Northrup Resistance Box #15453

Decade resistor box by Leeds & Northrup Co. Philadelphia. Patent No. 191685. Dimensions: 14.00 " W x 5.00 " H x 1.25 "D; 

An Electrical Resistor Decade Box by Leeds & Northrup Co., Philadelphia, 20th Century. Numbered 6203. Having copper fittings. H: 5 1/8 W: 8 1/4 D: 3 3/4 ins. Proceeds to benefit the Case Western Reser

Vintage Leeds & Northrup Co Potentiometer, 600 OHM Attenuation Box General Radio Co

17" w x 10" deep x 8" h

9" Diameter

Two portable volt meter type pc, a Westinghouse (East Pittsburg,Pa) and a Leeds & Northrup co. Philadelphia.

11" w x 5" deep x 5" h

L.E. Knott Apparatus Co. Wood and brass relay & L.E. Knott Apparatus Co. Resistance Box. Also includes C.H. Stoelting Apparatus Telegraph Key. Measures 3 1/4" x 8" x 4 1/8" & 4" x 8 1/4" x 4 1/2" & 4"

A Wheatstone Bridge by Leeds & Northrup Co., Philadelphia, 20th Century, Together with a slide wire resistor, 20th Century. H: 2 1/2 W: 23 3/4 D: 6 1/4 in.

9" w x 6" deep x 6"h

5.75 x 5.75 x 5.5 inches - some damage to base

12.75 x 9 x 7.75 inches when closed

9 x 7.5 x 6 inches when closed

A D'Arsonval Galvanometer by Leeds & Northrup Co., Philadelphia, Early 20th Century. H: 9 D: 4 3/4 ins. Proceeds to benefit the Case Western Reserve University Dayton Miller Scholarship Fund.

2 LEEDS & NORTHRUP CO. REFLECTING GALVANOMETERS Two Leeds & Northrup Co. reflecting galvanometers. Serial numbers 1067355 and 207797. Weight: 9.25" Shipping / Pickup: Buyer Pick Up, 3rd Party

Leeds & Northrup Co. Three Decade Resistors

Mfg. by Wheelco Instruments Co. Dimensions: 8.00 " W x 11.00 " H x 5.00 "D; 

18 x 11 x 9 inches when covered

Millivolt Potentiometer

Vintage Leeds & Northrup Co Light beam Galvanometer Model 2420 in wooden case

General Radio three dial ten peg decade resistance box. Low reactivity for radio applications. Type 102J General Radio Co. Cambridge MA, USA Dimensions: 5.20 " W x 12.50 "&nbs

Discreet resistance box with peg-based operation. 16 pegs. Terminals for Batt. & Galv. Dimensions: 9.25 " W x 6.75 " H x 4.75 "D; 

19.5 x 8.25 x 3.75 inches; untested

9 x 7.75 x 6 inches when closed