Apparatus for televising the interior of hazardous chamber

Claim 2

In apparatus having a television camera and extension lens assembly for televising the interior of an apertured hazardous chamber, said apparatus including means for cooling at least one portion of said assembly, the improvement comprising: a. powered operating means mounted independent of said chamber for positioning the extension lens axially relative said aperture and for retracting the lens therefrom, and b. means responsive to a predetermined change in cooling or purging properties within said assembly for controlling the operation of means (a).

Claim 3

The apparatus of claim 1 wherein means (a) is adapted for both extending and retracting the lens into and out of said aperture.

Claim 4

The apparatus of claim 1 wherein means (b) is adapted to respond to a predetermined reduction in cooling or purging properties to effect lens retraction.

Claim 5

The apparatus of claim 1 including: c. means acted on by means (a) movement and connected to control means (b) for limiting axial movement of the extension lens.

Claim 6

The apparatus of claim 1 wherein means (a) comprises: i. a support member mounted independent of said chamber and alignable with the chamber aperture, ii. a camera and lens carriage mounted movably along the support member, and iii. means operative under control of means (b) for driving said carriage along the support member.

Claim 7

In apparatus for televising the interior of an apertured hazardous chamber, the combination comprising: a. a television camera and extension lens assembly, b. means for cooling or purging at least one portion of said assembly, c. powered operating means mounted independent of said chamber for positioning the extension lens axially relative said aperture and for retracting the lens therefrom, and d. means responsive to predetermined changes in cooling or purging properties within said assembly for controlling the operation of means (c).

Claim 8

In apparatus for televising the interior of an apertured hazardous chamber, the combination comprising: a. a television camera and extension lens assembly, b. means for cooling or purging at least one portion of said assembly, c. powered operating means mounted independent of said chamber for positioning the extension lens axially relative said aperture and for retracting the lens therefrom, and d. means responsive to predetermined changes in cooling or purging properties within said assembly for controlling the operation of means (c).

Claim 9

Apparatus for televising the heated interior of a chamber comprising: a. a television camera having an extension lens assembly attached thereto, b. a housing surrounding said camera and said lens assembly, c. means for circulating cooling air under pressure through the interior of said housing, d. an adjustable support for (a) and (b) in which (a) and (b) are supported independently of said chamber in a predetermined position relative to an opening in said chamber, and e. means associated with (d) responsive to a predetermined reduction in the pressure of cooling air circulating through said housing for retracting (a) and (b) from the predetermined position relative to the opening in said chamber.

Claim 10

Apparatus for televising the heated interior of a chamber comprising: a. a television camera having an extension lens assembly attached thereto, b. a housing surrounding said camera and said lens assembly, c. means for circulating cooling air under pressure through the interior of said housing, d. an adjustable support for (a) and (b) in which (a) and (b) are supported independently of said chamber in a predetermined position relative to an opening in said chamber, and e. means associated with (d) responsive to a predetermined reduction in the pressure of cooling air circulating through said housing for retracting (a) and (b) from the predetermined position relative to the opening in said chamber.

Claim 11

The apparatus of claim 7 in which at least a portion of the cooling air is discharged from said housing over the face of said lens assembly.