Emergency shut-off switch for exercise apparatus

Details Emergency shut-off switch for exercise apparatus Emergency shut-off switch for exercise apparatus

1979-06-18

1984-01-17

Hafer, Robert A.

Undertaking

272DIG4, A63B 2306

Patent

active

044260750

ABSTRACT:
A safety switch for use with a personal exercise machine, of the type having a driven endless belt, permits the drive motor to be shut off immediately by a quick downward thrust by the user of two prominent handles. The extent of travel of the linkage in the switch system is extremely short and the pressure necessary to actuate the safety switch is adjustable. Downward thrust of the handles, by overcoming an adjustable tension spring, frees the switch actuating lever so that the switch is biased to an open position thereby breaking the circuit to the drive motor.

REFERENCES:
patent: 921755 (1909-05-01), Volk
patent: 937795 (1909-10-01), Hackney
patent: 2370420 (1945-02-01), Rayburn
patent: 2399915 (1946-05-01), Drake
patent: 3332683 (1967-07-01), Rand
patent: 3518985 (1970-07-01), Quinton
patent: 3643943 (1972-02-01), Erwin, Jr.
patent: 3659845 (1972-05-01), Quinton
patent: 3711812 (1973-01-01), Cherry
patent: 3731917 (1973-05-01), Townsend
patent: 3737163 (1973-06-01), Sumrall

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