Insulator for an open-coil electric heating element

- Emerson Electric Co.
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Description

FIG. 1 is an enlarged, perspective view of an insulator for an open-coil electric heating element, showing my new design, the insulator being usable in double-stack heater constructions wherein upper and lower coil reaches are supported from the top and bottom portions of the insulator.

FIG. 2 is a plan view of one side thereof, the opposite side being a mirror image.

FIG. 3 is an elevational view of one end thereof, the opposite end being a mirror image.

FIG. 4 is an elevational view looking from the top of FIG. 2.

FIG. 5 is an elevational view looking from the bottom of FIG. 2.

FIG. 6 is a perspective view of another embodiment of my new design and consists of the upper portion of the insulator shown in FIGS. 1, 2 and 3, for use in single-stack heater constructions.

FIG. 7 is an enlarged perspective view of an insulator for an open coil electric heating element, showing another embodiment of my new design.

FIG. 8 is a plan view of one side thereof, the opposite side being a mirror image.

FIG. 9 is an elevational view of one end thereof, the opposite end being a mirror image.

FIG. 10 is an elevational view looking from the top of FIG. 8.

FIG. 11 is an elevational view looking from the bottom of FIG. 8.

FIG. 12 is a perspective view of another embodiment of my new design and consists of the upper portion of the insulator shown in FIGS. 7, 8 and 9, for use in single-stack heater constructions.

Referenced Cited
U.S. Patent Documents
D248943 August 15, 1978 King
1597900 August 1926 Keene
1695801 December 1928 Dibble
2490139 December 1949 Kuenne
2498842 February 1950 Kuenne
2764626 September 1956 Teichroew
3846619 November 1974 Wightman et al.
3935376 January 27, 1976 Cooper et al.
Patent History
Patent number: D261260
Type: Grant
Filed: Oct 22, 1979
Date of Patent: Oct 13, 1981
Assignee: Emerson Electric Co. (St. Louis, MO)
Inventor: Wayne R. Seeley (Pulaski, VA)
Primary Examiner: A. Hugo Word
Attorney: Michael Williams
Application Number: 6/86,937
Classifications
Current U.S. Class: D13/18
International Classification: D1303;