Mechanical guns and projectors – Element
Patent
1979-06-18
1981-02-10
Browne, William R.
Mechanical guns and projectors
Element
124 7, F41D 1100
Patent
active
042495083
ABSTRACT:
An improved spring assembly for driving the throwing arm of a ball throwing machine. The assembly is mountable on a central transverse drive shaft of the machine. It includes a primary spring with an outwardly extending loop for loading against an abutment as the shaft is rotated in a first direction about its axis and for unloading in the first direction upon disengagement of the abutment. A secondary spring assembly is mountable to the drive shaft and includes a looped end engaging the outwardly extending arm of the primary spring assembly at a point approximately midway along its length. The secondary spring loads against the loop of the primary spring in response to rotation of the drive shaft, and unloads to drive the first loop forcibly in the first direction upon disengagement of the abutment by the first loop. An energy absorbing spring of the assembly mounts to the drive shaft and operatively engages the first loop to prevent stress reversal in the primary and secondary spring assemblies due to unrestricted unloading. All three springs are mounted to at least one central hub that in turn is mountable to the drive shaft for rotation therewith.
REFERENCES:
patent: 629044 (1899-07-01), McGlashan
patent: 1758032 (1930-05-01), Dickman
patent: 1777976 (1930-10-01), LaCoste
patent: 2660158 (1953-11-01), Binks
patent: 3838677 (1974-10-01), Alvares
patent: 3841294 (1974-10-01), McGill
Glover Clinton G.
Keller Harold A.
Browne William R.
Cytron, Inc.
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