초록 ▼

A kit for connecting and sealing a manhole cover frame to the upper surface of a chimney and a method of using the kit. The kit contains a spacer which may be cut to the proper length and to make allowances for any grade in the surface, a top flange which holds the top of the spacer to the manhole c

A kit for connecting and sealing a manhole cover frame to the upper surface of a chimney and a method of using the kit. The kit contains a spacer which may be cut to the proper length and to make allowances for any grade in the surface, a top flange which holds the top of the spacer to the manhole cover frame, and a bottom flange which holds the spacer to the upper surface of the chimney. The surfaces of the flanges which contact the lower surface manhole cover frame and the upper surface of the chimney contain coaxial recesses for holding butyl rubber sealant material in rope form. Watertight seals may be made with the use of light pressure. Additionally, the lower flange may be connected to the chimney with bolts. The surfaces of the flanges contacting the spacer contain a plurality of coaxial protrusions. The ends of the spacer are fitted with gaskets and sealed into the spaces between the protrusions on the top and bottom flanges to form watertight seals. The kit is used by applying a sealant material to the recess in the bottom surface of the the bottom flange, sealing the bottom flange to the chimney, cutting the spacer to the proper length and angle, applying gaskets to the top and bottom ends of the spacer, sealing the spacer to the flanges, and adhering the top flange to the manhole cover frame with the use of a sealant material.

대표청구항 ▼

A kit for connecting and sealing a manhole cover frame to the upper surface of a chimney and a method of using the kit. The kit contains a spacer which may be cut to the proper length and to make allowances for any grade in the surface, a top flange which holds the top of the spacer to the manhole c

A kit for connecting and sealing a manhole cover frame to the upper surface of a chimney and a method of using the kit. The kit contains a spacer which may be cut to the proper length and to make allowances for any grade in the surface, a top flange which holds the top of the spacer to the manhole cover frame, and a bottom flange which holds the spacer to the upper surface of the chimney. The surfaces of the flanges which contact the lower surface manhole cover frame and the upper surface of the chimney contain coaxial recesses for holding butyl rubber sealant material in rope form. Watertight seals may be made with the use of light pressure. Additionally, the lower flange may be connected to the chimney with bolts. The surfaces of the flanges contacting the spacer contain a plurality of coaxial protrusions. The ends of the spacer are fitted with gaskets and sealed into the spaces between the protrusions on the top and bottom flanges to form watertight seals. The kit is used by applying a sealant material to the recess in the bottom surface of the the bottom flange, sealing the bottom flange to the chimney, cutting the spacer to the proper length and angle, applying gaskets to the top and bottom ends of the spacer, sealing the spacer to the flanges, and adhering the top flange to the manhole cover frame with the use of a sealant material. ight path from an incident surface of the power variation optical relay system to an exit surface of the superposition optical system to convert an incident beam of unpolarized light to a light beam having a linearly polarized component with one type of polarization direction and emits the converted light beam, wherein a size of a light beam entering the polarization conversion system is reduced in a prescribed direction by the power variation optical relay system. 2. The illumination system according to claim 1, wherein the power variation optical relay system includes: a first lens array having a plurality of first small lenses, a relay lens array having a plurality of relay lenses that is disposed on a light emission side of the first lens array, and a second lens array having a plurality of second small lenses that is disposed on a light emission side of the relay lens array, wherein the first lens array and the second lens array are disposed at conjugate points of the relay lens array, and wherein the polarization conversion system includes: a polarization beam splitter array that has a plurality of pairs of mutually parallel polarization splitting film and reflecting film in an inclined state along the prescribed direction and separates the incident beam of unpolarized light into a plurality of partial light beams of two types of linearly polarized light, and a polarization conversion device that converts a polarization direction of a first type of linearly polarized light of the two types of linearly polarized light to a same polarization direction as a second type of linearly polarized light, wherein a light beam entering the polarization conversion device is split by the power variation optical relay system into a plurality of partial light beams, and the size of each of the plurality of partial light beams in the prescribed direction is reduced by the power variation optical relay system. 3. The illumination system according to claim 2, wherein the superposition optical system includes: a third lens array having a plurality of third small lenses on which the plurality of partial light beams entering the superposition optical system impinge, a fourth lens array having a plurality of fourth small lenses corresponding to the plurality of third small lenses, and a superposition lens that superposes onto the illumination region a plurality of partial light beams passing through the third lens array and the fourth lens array. 4. The illumination system according to claim 3, wherein the polarization conversion system is disposed between the third lens array and the fourth lens array. 5. The illumination system according to claim 4, wherein the second lens array and the third lens array are optically integrated. 6. The illumination system according to claim 2, wherein the superposition optical system includes: a third lens array having a plurality of small lenses that superposes the plurality of partial light beams substantially on the illumination region, and a fourth lens array having a plurality of fourth small lenses corresponding to the plurality of third small lenses. 7. The illumination system according to claim 6, wherein the polarization conversion system is disposed between the third lens array and the fourth lens array. 8. The illumination system according to claim 7, wherein the second lens array and the third lens array are optically integrated. 9. The illumination system according to claim 2, wherein the polarization conversion system is disposed between the power variation optical relay system and the superposition optical system. 10. The illumination system according to claim 2, wherein the polarization conversion system is disposed between the relay lens array and the second lens array of the power variation optical relay system. 11. The illumination system according to claim 2, wherein the plurality of first small lenses of the first lens array each has a different optical axis