US1982121A - Electric resistance unit - Google Patents

Description

Nov. 27, 1934. R J PARSONS ELECTRIC RESISTANCE UNIT Filed June 1, 1932 INVENTOR Roberl JPamons ATTORNEY Patented Nov. 27, 1934 UNITED STATES PATENT} OFFICE ELECTRIC RESISTANCE UNIT Robert J. Parsons, Schenectady,

to Consolidated Car-Heating N. Y., assignor Company, Inc.,

2 Claims.

For a detailed description of the present form of my invention, reference may be had to the following specification and to the accompanying drawing forming a part thereof, wherein Fig. 1 is a plan of my unit;

Fig. 2 is a section thereof;

Fig. 3 is an end view;

Figs. 4 and 5 show respectively plan and end views of the modification.

My invention consists in an electric resistanceunit which is entirely surrounded by a sheet metal cover and has in addition an external compartment formed thereon by casting wherein the exposed terminals are contained, the said enlargement being formed as a separate casting applied to the sheet iron cover of the resistance.

Referring to the drawing A represents a resistance enclosed in a sheet metal cover. It is flat and thin in form and carries two exposed contacts C, C seated on a porcelain base D therein. Around these contacts and the porcelain base, I form a separate metal enclosure B, by a casting applied to the sheet metal covering of the said coil. It will be noted that the base portion of the casing 13 is so applied that it embraces the edges of the sheet metal cover of the resistant unit in the vicinity of the contact terminals.

This enclosure constitutes a separate rectangular pocket which surrounds the contacts and U9 converts the resistance into a completely enclosed unit, in which there is no exposure of the binding screws forming the terminals. The enclosure is provided with a separable cover E, and on one side thereof is formed an opening F which the 5 line wires may pass through to connect with the now covered-over binding posts C, C

In Figs. 4 and 5 I have shown two separate metal-clad resistances A, A of the kind aforesaid, on which a single casting B is formed to include the binding posts G, G of the second resistance A as well as the posts C, C of the first one and unite the two resistances in a single article.

In this manner I provide a simple and a highly useful form of resistance which is water and moisture proof and capable of service in many places where the resistance without my enclosure would not be used.

What I claim as new and desire to secure by Letters Patent is:

1. An electric resistance comprising a fiat thin resistance element, a sheet metal cover enclosing said element, contact terminals extending through one face of said cover and in adjacent positions, a cast enclosure for said contact terminals provided with a base portion provided with portions complemental to and embracing the edge portions of said casing in the vicinity of said contact terminals in such manner as to leave the intervening areas of said cover exposed, said enclosure having a side opening for the passage of lead wires to said terminal contacts, and a detachable cover for said enclosure.

2. An electric resistance comprising a fiat tnin resistance element, a sheet metal cover enclosing the same, a porcelain base engaging one face of said cover near an end thereof, contact terminals extended through the last mentioned face of the cover and through said porcelain base, a cast enclosure for said contact terminals and base provided with a base portion constructed and arranged to embrace the edge portions of the casing in the vicinity of said porcelain base in such manner as to leave the intervening areas of said sheet metal cover exposed, said enclosure having-a side opening for the passage of lead wires to said terminal contacts, and a detachable cover for said enclosure.

ROBERT J. PARSONS.

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