Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1995-06-19
1996-07-16
Marmor, Charles A.
Machine element or mechanism
Control lever and linkage systems
Elements
74 8919, 74512, 74514, 74560, 200 865, G05G 114
Patent
active
055356427
ABSTRACT:
A foot operated electrical control has a generally rectangular housing for protectively enclosing operating components, formed by a base and a treadle-type cover that have overlying sets of opposed side walls. A mounting shaft extends through aligned holes formed through the side walls to mount the treadle on the base for relative pivotal movement between a normal "non-operated" position and a range of "operated" positions. The operating components include a pair of arms that are connected to the operating shaft for relative pivotal movement between an "off" position and a range of "operating" positions, a first spring that biases the arms toward their "off" position, and a second spring that biases one arm into engagement with the base and also biases the treadle toward its "non-operated" position. A variable resistance potentiometer connected to the one arm has a control shaft that mounts a pinion. A gear rack connected to the other arm engages the pinion to rotate the control shaft in response to relative movement of the arms. A switch that is also connected to the other arm has an actuator that is disengaged by the treadle when both the other arm is in its "off" position and the treadle is in its "non-operated" position. Movement of the treadle from its "non-operated" position causes the switch to operate before the arms are moved relative to each other to cause the rack and pinion to rotate the control shaft of the potentiometer.
REFERENCES:
patent: 2866024 (1958-12-01), Ginn
patent: 2893284 (1959-07-01), Washington, Jr.
patent: 2985031 (1961-05-01), Bennett
patent: 2986953 (1961-06-01), Armond et al.
patent: 3103905 (1963-09-01), Althens et al.
patent: 4322711 (1982-03-01), Spangler et al.
Linemaster Switch Corporation, Brochure Entitled "Linemaster--America's Foot Switch Leader," Sep. 1984, pp. 1-28, Especially p. 7.
PowCon Incorporated, Brochure Entitled "Welding & Cutting Power Sources for the Construction Industry," 1993, pp. 1-6, Especially p. 6.
Burge David A.
Kim Chong H.
Marmor Charles A.
LandOfFree
Foot operated variable resistance electrical control with switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Foot operated variable resistance electrical control with switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Foot operated variable resistance electrical control with switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1776993