Waterproof pace clock

[0001] Swimming has grown as an important competitive sport. It has also grown as a very important fitness tool for thousands of others. Walk into any competitive or fitness pool and you will see at least one and sometimes up to as many as seven clocks fixed to the wall or mobile clocks on the deck area. These clocks are used for pacing and timing during swim training.

[0002] Competitive and fitness training has evolved considerably. Today, interval training is the basic tool of the swimmer's development and requires the swimmer to keep track of his/her time so that s/he can vary the intensity within pre-designed training sets. The current timing situation requires the swimmer to attempt to view the wall/deck clock resulting in a pause in stroke.

[0003] In distance training or competition, the swimmer must be able to pace his/herself to be most effective. Currently, the swimmer must pause and sight an on deck clock or simply trust his own inner timing. The end result is often a swim for a distance that is concluded with a surplus of energy or the opposite.

[0004] The present invention, an underwater pace clock, can be placed as a free-standing unit at the bottom of the pool. A swimmer, without disruption of his or her stroke, readily sees the easy-to-read digital display. This provides the swimmer with a very significant addition of control over his/her effectiveness in training or competition. The swimmer can reset the clock simply by tilting the apparatus forward by 90 degrees and activating the mercury switch setting the display back to zero. Furthermore, the underwater pace clock may be synchronized with the wall clock.

[0007] The extruded plexiglas tube 18 is formed into a special shape and cut to length. Solar panel and internal electronic circuit board including the mercury switch 14 together with liquid crystal display 12 are inserted into the cut extruded plexiglas tube 18. Two machined endcaps 16 each with an O-ring seal for water tightness are specifically grooved to accept shaped form 18 and positioned as illustrated in FIG. 1. The endcaps 16 are fastened by three threaded rods with six nuts 20. The fastening of the nuts exert a pull on the endcaps to complete the watertight seal. The individual cap 10 seals the opening that allows battery replacement and the on off switch.