Alarm enhancing protective cover for safety instruments with optional calibration chamber
First Claim
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1. An alarm enhancing protective cover for a portable safety device, said safety device having a case that defines a front face and at least two side faces that are connected to the perimeter of the front face, said front face including a port for the speaker of an audible alarm, said alarm enhancing protective cover comprising:
- a front panel having a sound redirecting surface; and
side panels that are connected to the perimeter of the front panel, said side panels cooperating with said front panel to define a cavity, the front face and at least a portion of said side faces of the case of said portable safety device being receivable in said cavity, at least one of said side panels having structure for removably engaging respective side faces of the case of the portable safety device such that, at times when said side panels engage the respective sides of the case of the portable safety device, the front panel of said cover, including said sound redirecting surface, is disposed apart from the front face of the cover of the portable safety device to define a sound chamber between the front panel of said cover and the front face of said case, at least one of said side panels at least partially defining an exit opening for said sound chamber with sound being output from the exit opening in response to sound being input to the sound chamber through the port of the front face of said case.
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Abstract
Methods and systems to redirect the audible and visible signals from alarms on a portable safety device. A cover (10) cooperates with a portable safety device (50) to define a sound chamber (12) that amplifies audible warning signals. A visual alarm guide (14) also is provided. A calibration adapter (500) affords quick and simple bump testing and calibration of the portable safety device.
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Citations
32 Claims
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1. An alarm enhancing protective cover for a portable safety device, said safety device having a case that defines a front face and at least two side faces that are connected to the perimeter of the front face, said front face including a port for the speaker of an audible alarm, said alarm enhancing protective cover comprising:
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a front panel having a sound redirecting surface; and side panels that are connected to the perimeter of the front panel, said side panels cooperating with said front panel to define a cavity, the front face and at least a portion of said side faces of the case of said portable safety device being receivable in said cavity, at least one of said side panels having structure for removably engaging respective side faces of the case of the portable safety device such that, at times when said side panels engage the respective sides of the case of the portable safety device, the front panel of said cover, including said sound redirecting surface, is disposed apart from the front face of the cover of the portable safety device to define a sound chamber between the front panel of said cover and the front face of said case, at least one of said side panels at least partially defining an exit opening for said sound chamber with sound being output from the exit opening in response to sound being input to the sound chamber through the port of the front face of said case. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of amplifying an alarm on a portable safety device, said method comprising the steps of:
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attaching an alarm enhancing protective cover to a portable safety device that includes an audible alarm having a speaker port that is located on a front face of the portable safety device, wherein said protective cover includes a front panel that has a sound redirecting surface and side panels that are connected to the perimeter of the front panel, said side panels cooperating with said front panel to define a cavity, the front face and at least a portion of said side faces of the case of said portable safety device being receivable in said cavity, the side panels having structure for removably engaging respective side faces of the case of the portable safety device such that, at times when said side panels engage the respective sides of the case of the portable safety device, the front panel of said cover, including said sound redirecting surface, is disposed apart from the front face of the case of the portable safety device to define a sound chamber between the front panel of said cover and the front face of said case at least one of said side panels at least partially defining an exit opening to said sound chamber; and providing sound to said sound chamber through the port in the front face of said case to generate an amplified sound at the exit opening. - View Dependent Claims (25, 26, 27, 28)
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29. A method to improve the effectiveness of a portable safety device, said method comprising the steps of:
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attaching an alarm enhancing protective cover to a portable safety device that includes an audible alarm having a speaker port that is located on a front face of the portable safety device, wherein said protective cover includes a front panel that has a sound redirecting surface and side panels that are connected to the perimeter of the front panel, said side panels cooperating with said front panel to define a cavity, the front face and at least a portion of said side faces of the case of said portable safety device being receivable in said cavity, the side panels having structure for removably engaging respective side faces of the case of the portable safety device such that, at times when said side panels engage the respective sides of the case of the portable safety device, the front panel of said cover, including said sound redirecting surface, is disposed apart from the front face of the case of the portable safety device to define a sound chamber between the front panel of said cover and the front face of said case at least one of said side panels at least partially defining an exit opening to said sound chamber; attaching a calibration adapter to a front portion of the alarm enhancing protective cover, said calibration adapter having a gas inlet port and side walls that are adapted to removeably engage a front portion of said protective cover to cover the exit opening said protective cover at times when the side walls of said calibration adaptor engage said protective cover, said calibration adapter cooperating with said cover of said portable safety device at times when said side panels engage the respective sides of the portable safety device and with said protective cover at times when said side walls engage the protective cover to define a calibration chamber that is in communication with said gas inlet port; injecting gas having at least one constituent of known concentration into the calibration chamber through said gas inlet port; and determining the accuracy of the portable safety device with respect to the at least one constituent gas of known concentration. - View Dependent Claims (30, 31, 32)
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Specification