| 摘要 |
<p>A handheld gas content scale (1) for indicating the remaining weight of gas, such as low pressure gas, in a portable size of gas cylinder (10). The scale comprises a body defining an operatively approximately horizontal handle (2, 25, 37, 67, 95); at least one object support member (4, 28, 45, 73, 84, 98, 105) adapted for engagement with a gas cylinder; a weight activated mechanism (13, 23, 36, 70, 94, 108) at least partly housed in the body and adapted to be stressed by the weight of a gas cylinder supported by the object support member when the latter is supported by the handle; and indicator means (16, 30, 62, 64 and 65, 93, 99, 111) located in an operatively upper region of the handle defining body and directed upwardly for visibility from above. Means (15, 26, 39, 73, 104) are provided for zeroing the indicator means to reflect a 'zero' weight when an empty gas cylinder is supported by the scale.</p> |
