1. A dispenser for dispensing a composition in response to level changes in a liquid in a tank, the dispenser comprising:
a container for holding the composition;
a discharge conduit in fluid communication with the container;
an air inlet in fluid communication with the container; and
a level sensing member mounted to the dispenser such that a lower end of the level sensing member contacts the liquid in the tank and senses its level;
whereby a rise of the liquid in the tank between a lower liquid level and a higher liquid level can cause the level sensing member to alter air pressure in a headspace of the container above the composition and thereby cause a controlled discharge of the composition from the discharge conduit; and
whereby a fall of the liquid in the tank between the higher liquid level and the lower liquid level causes the level sensing member to alter pressure in the headspace and thereby causing air to be vented into the headspace from the air inlet.
2. The dispenser of claim 1, wherein:
the dispenser further comprises a holder structured to mount the container on a top end of an outer wall of the tank.
3. The dispenser of claim 2, wherein:
the holder has at least one hook for mounting the container on a top end of an outer wall of the tank.
4. The dispenser of claim 1, further comprising:
a vent tube having an upper end opening and a lower end opening, the upper end opening of the vent tube being in fluid communication with the air inlet, and the lower end opening of the vent tube being in fluid communication with a section of an interior space of the container.
5. The dispenser of claim 1, further comprising:
a compartment in fluid communication with the container and in fluid communication with the discharge conduit, the compartment accumulating an amount of the composition before a portion of the amount of the composition is discharged from the discharge conduit.
6. The dispenser of claim 5, wherein:
the compartment is in fluid communication with the container by way of a composition supply conduit having a lower orifice,
the compartment includes an exit passageway having an upper inlet and a lower outlet, and
the lower orifice of the composition supply conduit is positioned in the compartment below the upper inlet of the exit passageway of the compartment.
7. The dispenser of claim 6, wherein:
the upper inlet of the exit passageway is located on a top surface of an interior shoulder of the compartment, and
the lower orifice of the composition supply conduit is positioned in a well below the top surface of the interior shoulder of the compartment.
8. The dispenser of claim 1, wherein:
an air gap hole is located in a discharge passageway between the container and a discharge opening of the discharge conduit.
9. The dispenser of claim 1, further comprising:
a vent tube having an upper end opening and a lower end opening, the upper end opening of the vent tube being in fluid communication with the air inlet, and the lower end opening of the vent tube being in fluid communication with a lower section of an interior space of the container; and
a supply tube having an upper end opening and a lower end opening, the upper end opening of the supply tube being in fluid communication with the discharge conduit, and the lower end opening of the supply tube being in fluid communication with the lower section of the interior space of the container.
10. The dispenser of claim 1, further comprising:
a closure for sealing a mouth of the container.
11. The dispenser of claim 10, further comprising:
a vent tube attached to the closure, the vent tube having an upper end opening and a lower end opening, the upper end opening of the vent tube being in fluid communication with the air inlet, and the lower end opening of the vent tube being in fluid communication with a lower section of an interior space of the container; and
a supply tube attached to the closure, the supply tube having an upper end opening and a lower end opening, the upper end opening of the supply tube being in fluid communication with the discharge conduit, and the lower end opening of the supply tube being in fluid communication with the lower section of the interior space of the container.
12. The dispenser of claim 10, wherein the air inlet passes through the closure.
13. The dispenser of claim 10, further comprising a latch for holding the closure against the mouth of the container.
14. The dispenser of claim 1, wherein the tank is a toilet tank and the liquid is water.
15. The dispenser of claim 1 wherein:
the dispenser further comprises a housing and a diaphragm, the housing having an open end that is sealed by the diaphragm thereby defining an interior space of the housing, the interior space being in fluid communication with the headspace of the container above the composition; and
the level sensing member is a float; and
the float is attached to the diaphragm;
whereby the fall of liquid in the tank from a higher liquid level to a lower liquid level, the diaphragm may flex in a first direction and displace air in the headspace to be vented into the headspace from the air inlet; and
whereby the rise of liquid in the tank between the lower liquid level and the higher liquid level causes the diaphragm to flex in a second direction to alter air pressure in the headspace of the container above the composition and thereby cause the controlled discharge of the composition from the discharge conduit.
16. The dispenser of claim 1, wherein:
the level sensing member is a float;
the float is attached to a rod; and
a longitudinal position of the float on the rod can be adjusted.
17. A method for delivering a composition to a toilet bowl of a toilet having a toilet tank, the method comprising:
(a) providing a dispenser having
(i) a container holding the composition,
(ii) a level sensor in fluid communication with headspace above the composition in the container,
(iii) a discharge conduit in fluid communication with the container, and
(iv) an air inlet in fluid communication with the container;
(b) mounting the level sensor such that a lower end of the level sensor contacts water in the toilet tank;
(c) positioning the discharge conduit such that a discharge opening of the discharge conduit can deliver the composition to the toilet bowl; and
(d) flushing the toilet whereby a fall of liquid in the tank between a higher liquid level and a lower liquid level causes the level sensing member to alter air pressure in a headspace of the container above the composition and thereby causing air to be vented into the headspace from the air inlet, and a subsequent rise of the liquid in the tank between a lower liquid level and a higher liquid level causes the level sensing member to alter pressure in the headspace and thereby causes a controlled discharge of the composition from the discharge conduit.
18. The method of claim 17, wherein the discharge opening of the discharge conduit is positioned in or above an overflow tube of the toilet.
19. The method of claim 17, wherein the container is mounted on a top end of an outer wall of the toilet tank.
20. The method of claim 17, wherein the container is mounted on a top end of an outer wall of the toilet tank such that the container is located outside the toilet tank.
21. The method of claim 17, wherein the dispenser is maintained at constant pressure during the fall and rise of liquid in the tank.
22. The method of claim 18, wherein the constant pressure is atmospheric pressure.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. Headlight, in particular for motor vehicles, with an elongated incandescent body (2) with an incandescent body longitudinal axis (4), with a reflector (6) associated with the incandescent body for bundling of light emitted from the incandescent body, and with a photoconductor, in which light emitted from the reflector (6) in a direction of an optical axis (10) is coupled-in by means of a coupling-in surface (12) of the photoconductor (8), characterized in that the incandescent body longitudinal axis (4) forms an angle a with the optical axis (10) of >0 degrees.
2. Headlight as defined in claim 1, characterized in that the angle () between the incandescent body longitudinal axis (4) and the optical axis (10) 30 degrees.
3. Headlight as defined in claim 1, characterized in that the angle () between the incandescent body longitudinal axis (4) and the optical axis 45 degrees.
4. Headlight as defined in claim 1, characterized in that the angle () between the incandescent body longitudinal axis (4) and the optical axis (10) 60 degrees.
5. Headlight as defined in claim 1, characterized in that the angle () between the incandescent body longitudinal axis (4) and the optical axis (10)90 degrees.
6. The headlight as defined in claim 1, characterized in that incandescent body images (62, 66) emitted from the incandescent body (2) and bundled from the reflector (6) are produced with large and small projection surfaces.
7. Headlight as defined in claim 1, characterized in that the photoconductor (8) andor the coupling-in surface (12) have a non-circular cross section with an extension in a longitudinal and a transverse direction (56, 72; 58, 74).
8. Headlight as defined in claim 7, characterized in that the photoconductor (8) andor the coupling-in surface (12) have a cross section with a maximum extension in a longitudinal direction.
9. Headlight as defined in claim 7, characterized in that the photoconductor andor the coupling-in surface have a cross section with a maximum extension (60), wherein a direction of the maximum extension deviates from a direction of the longitudinal extension (54) of the cross section.
10. Headlight as defined in claim 9, characterized in that the incandescent body images (62, 66) with large projection surfaces lie parallel to a maximum extension (60) of the coupling-in surface (12) of the photoconductor (8).
11. Headlight as defined in claim 6, characterized in that the incandescent images (62, 66) with small projection surfaces lie in regions of the coupling-in surface that are not covered or only partially covered by incandescent body images with large projection surfaces.
12. Headlight as defined in claim 1, characterized in that the incandescent body (2) is formed as an incandescent coil.
13. Headlight as defined in claim 1, characterized in that the incandescent body (20) is formed as an arc lamp.
14. Headlight as defined in claim 13, characterized n that the arc lamp is produced from a gas discharge lamp.