초록 ▼

A burner apparatus includes a mounting head having a fuel inlet opening defined in the mounting head for receiving combustion air and fuel gas through the opening. An inner support structure is attached to the mounting head. The inner support structure defines an interior zone communicated with the

A burner apparatus includes a mounting head having a fuel inlet opening defined in the mounting head for receiving combustion air and fuel gas through the opening. An inner support structure is attached to the mounting head. The inner support structure defines an interior zone communicated with the fuel inlet opening of the head. An exterior layer of flexible woven heat resistant material is received about the inner support structure and defines an exterior flame attachment surface. The mounting head may include a radial opening defined therethrough. An igniter is located outside of the mounting head adjacent the radial opening so that the igniter is proximally spaced from a combustion zone surround the burner apparatus. The burner apparatus may include a plurality of foraminous back pressure plates located in the interior zone distal of the igniter for balancing the pressure of the fuel gas/combustion air mixture along the length of the burner.

대표청구항 ▼

A burner apparatus includes a mounting head having a fuel inlet opening defined in the mounting head for receiving combustion air and fuel gas through the opening. An inner support structure is attached to the mounting head. The inner support structure defines an interior zone communicated with the

A burner apparatus includes a mounting head having a fuel inlet opening defined in the mounting head for receiving combustion air and fuel gas through the opening. An inner support structure is attached to the mounting head. The inner support structure defines an interior zone communicated with the fuel inlet opening of the head. An exterior layer of flexible woven heat resistant material is received about the inner support structure and defines an exterior flame attachment surface. The mounting head may include a radial opening defined therethrough. An igniter is located outside of the mounting head adjacent the radial opening so that the igniter is proximally spaced from a combustion zone surround the burner apparatus. The burner apparatus may include a plurality of foraminous back pressure plates located in the interior zone distal of the igniter for balancing the pressure of the fuel gas/combustion air mixture along the length of the burner. rn employs a single scanning beam. 10. The device as recited in claim 9, wherein the second scan pattern is suitable for use in a hand held scanning device. 11. The method as recited in claim 1, where: the device is a hand-held device, moveable by an operator to a scanning position for reading a bar code. 12. The method as recited in claim 11, wherein: the scanning position is a fixed position, unmovable relatively to the bar code being read. 13. The method as recited in claim 12, wherein: upon detection of the movement of the device relative to the scanning position, discarding the bar code data derived when scanning the bar code with the second scan pattern. 14. A method for reading a bar code, comprising the steps of: selectively producing a first scan pattern of a scan beam for reading a bar code in a first mode and a second scan pattern of the scan beam for reading a bar code in a second mode; selecting the second scan pattern by manual actuation of a switch and, while the switch is actuated, scanning a bar code with the second scan pattern; determining whether the switch is released; and after a predetermined time period following release of the switch, selecting the first scan pattern for reading a bar code. 15. The device as recited in claim 14, wherein the first scan pattern employs a greater number of scanning beams than the second scan pattern. 16. The method as recited in claim 14, wherein the second pattern employs one or more parallel scanning beams. 17. The method as recited in claim 14, wherein the scan beam is proceeded by a scanning device, further comprising: detecting movement of the scanning device relatively to a bar code being scanned with the second scan pattern; and upon detection of the relative movement, discarding bar code data derived when scanning the bar code with the second scan pattern. 18. The method as recited in claim 17, wherein: the scanning device is a hand-held device, moveable by an operator to the scanning position. 19. The method as recited in claim 18, wherein: the scanning position is fixed relatively to the bar code being scanned. 20. The method as recited in claim 19, wherein: upon detection of the movement of the device relative to the scanning position, discarding the bar code data derived when scanning the bar code with the second scan pattern. 21. The method as recited in claim 14, further comprising: terminating further bar code reading using the second scan pattern during the predetermined time period. 22. A medium storing a program readable by computer for controlling a computer to read a bar code by a scanning device, including responding to manual actuation of a switch on a scanning device, by: selectively producing a first scan pattern of a scan beam for reading a bar code in a first mode and a second scan pattern of the scan beam for reading a bar code in a second mode; selecting the second scan pattern by manual actuation of a switch and, while the switch is actuated, scanning a bar code with the second scan pattern; determining whether the switch is released; and after a predetermined time period following release of the switch, selecting the first scan pattern for reading a bar code. 23. The memory medium storing a program as recited by claim 22, wherein the first scan pattern employs a greater number of scanning beams than the second scan pattern. 24. The memory medium storing a program as recited by claim 22, wherein the second pattern employs one or more parallel scanning beams. 25. The memory medium storing a program as recited by claim 22, wherein the scan beam is proceeded by a scanning device, further comprising: detecting movement of the scanning device relatively to a bar code being scanned with the second scan pattern; and upon detection of the relative movement, discarding bar code data derived when scanning the bar code with the second scan pattern. 26. The memory medium storing a program as r ecited by claim 25, wherein: the scanning device is a hand-held device, moveable by an operator to the scanning position. 27. The memory medium storing a program as recited by claim 26, wherein: the scanning position is fixed relatively to the bar code being scanned. 28. The memory medium storing a program as recited by claim 27, upon detection of the movement of the device relative to the scanning position, discarding the bar code data derived when scanning the bar code with the second scan pattern. 29. The memory medium storing a program as recited by claim 22, further comprising: terminating further bar code reading using the second scan pattern during the predetermined time period.