1. A cradle for mounting a constant force spring in a pressure relief valve assembly comprising:
a one piece bracket having a pair of spaced apart upstanding legs, at least one of said legs having a predetermined width dimension with a camming lug portion adjacent one end thereof, and a tie plate extending across the legs adjacent end portions thereof for tying the legs together in spaced parallel relation.
2. A pressure relief valve assembly for venting overpressures in a tank, comprising:
a valve mounting plate for attachment to a tank, said valve mounting plate supporting at least a pair of constant force spring assemblies operably connected to a moveable valve element, each spring assembly having a one piece bracket, said bracket having a pair of spaced apart upstanding legs, at least one of said legs having a predetermined width dimension with a camming lug portion adjacent an end portion thereof, and an integral tie plate extending across the legs adjacent their end portions for tying the legs together, said valve mounting plate and said bracket being of steel and being welded together at said bracket base.
3. A pressure relief valve assembly for venting overpressures in a tank, comprising:
a valve plate for attachment to a tank, said valve mounting plate supporting at least a pair of constant force spring assemblies operably connected to a moveable valve element, each spring assembly having a one piece stainless steel bracket, said bracket having a pair of spaced apart upstanding legs and an integral base portion, at least one of said legs having a predetermined width dimension with a camming lug portion adjacent said base, and a tie plate extending across the legs adjacent end portions thereof for tying the legs together, said valve mounting plate and said bracket being of rolled stainless steel material and being welded together at said bracket base.
4. Apparatus according to any one of claims 1-3 wherein said bracket has a U-shaped configuration in vertical elevation and said tie plate portion extends across the legs adjacent their lower end portions.
5. Apparatus according to any one of claims 1-3 wherein said bracket has a U-shaped configuration in plan and said legs are separated adjacent their lower end portions, and said tie plate portion extends across the legs above their lower end portions.
6. Apparatus according to any one of claims 1-3 wherein said tie plate extends across the legs opposite said camming leg portion thereof.
7. Apparatus according to any one of claims 1-3 wherein each of said lugs has a camming lug portion adjacent the lower ends thereof.
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. A culture sample holder which can be placed in a culture apparatus, comprising:
an inner holder, which is hollow inside and comprises a bottom that defines an outer bottom,
an outer holder, which is hollow inside and comprises a bottom that defines an inner bottom,
the inner holder being insertable in the outer holder in a direction of insertion to an assembly of the inner holder and outer holder where the outer bottom of the inner holder faces the inner bottom of the outer holder, thus forming a space for a culture sample to be placed between the outer bottom of the inner holder and the inner bottom of the outer holder,
the inner holder further comprising a protrusion and the outer holder further comprising a side wall and a recess in said side wall, the protrusion being placed in a first position of the inner holder inside said recess in the side wall of the outer holder and, in a second position of the inner holder rotated around an axis running in the direction of insertion, the protrusion is placed in the outer holder outside the recess at a higher position with respect to the first position.
2. The holder according to claim 1, wherein the inner holder and the outer holder are provided with protrusions and recesses, respectively, in pairs so that, in said first position, a pair of protrusions is aligned with a pair of recesses and, in said second, rotated position of the inner holder, the pair of protrusions is left outside the pair of recesses.
3. The holder according to claim 1, wherein the recess of the outer holder is a slot extending through the side wall of the outer holder and being open on top, and the higher position, in which the protrusion of the inner holder in said second rotated position of the inner holder is placed, is an upper edge of the side wall adjacent to the slot.
4. The holder according to claim 2, wherein the recesses of the outer holder are slots extending through the side wall of the outer holder and being open on top, and the higher position, in which the protrusions of the inner holder in said second rotated position of the inner holder are placed, is an upper edge of the side wall adjacent to the slots.
5. The holder according to claim 1, wherein both the inner holder and the outer holder comprise an opening at the bottom.
6. The holder according to claim 2, wherein both the inner holder and the outer holder comprise an opening at the bottom.
7. The holder according to claim 1, wherein the inner holder forms together with other similar holders a series, where the inner holders are aligned in a row at regular intervals from each other and connected at their top parts by horizontal connecting elements.
8. The holder according to claim 7, wherein weakenings are provided between the top parts of the inner holders and the connecting elements for detaching single inner holders from the series.