Baths – closets – sinks – and spittoons – Dry closets – With heating meas
Patent
1977-07-25
1979-08-07
Stephan, Steven L.
Baths, closets, sinks, and spittoons
Dry closets
With heating meas
135 71R, E04H 319, E04F 1000
Patent
active
041632958
ABSTRACT:
A swimming pool cover has a central arm and support arms pivotally attached to the central arm for movement generally in one plane. A sheet of flexible, waterproof material is attached to each of the arms and extends between the arms. The central arm is pivoted to move in a vertical plane, and is raised and lowered by means of a manually operated rack and pinion gear located in a post. The post is supported by a swivel mount set in the pool surrounds so that the central arm may be rotated from a position over the pool to one over the pool surrounds. A manually operated endless chain within the central arm carries a plate pivotally attached to retracting arms which are in turn pivotally attached to the outermost support arms. Movement of the endless chain and hence the plate serves to open and close the arms and hence the cover. A cable threaded through loops along the edge of the sheet of cover material and running over pulleys inserted in sleeves in the pool surrounds, when tensioned by a winch, prevents entry into the pool when the cover is in a fully lowered position.
REFERENCES:
patent: 3008148 (1961-11-01), Vierling
patent: 3186420 (1965-06-01), Magee
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