Steam ironing press with motor and relay control
AssigneeThe Singer Company
InventorMan Y. Foo
Life of this patent
Estimating the term…
Abstract
A steam press for pressing fabric is disclosed. The press includes a piston pump which draws water out of a water reservoir and forces the water into a water inlet port of the press. The pump is operated by a direct current motor which is coupled to the piston of the pump by a drive shaft. The piston is caused to slide back and forth by means of first and second relays coupled between a source of direct current and the motor. The first and second relays apply, respectively, direct voltage of a first polarity and a second reverse polarity to the motor.
Claims8
A steam press for pressing fabric comprising:
- a water inlet port;
- a water reservoir having a water outlet port;
- a pump having a longitudinally elongated pump body with an inlet connected to the reservoir outlet and an outlet connected to the water inlet port in said press, said body having a piston longitudinally slidable back and forth therein;
- a direct current motor having a drive shaft coupled to said piston, said shaft rotating in a first direction when a direct voltage of a first polarity is applied to the motor to cause the piston to slide longitudinally in the pump body in a direction to draw water out of the reservoir into the pump body, said shaft rotating in a second and reversed direction when a direct voltage of a second and reversed polarity is applied to said motor to cause the piston to slide longitudinally in the pump body in reversed direction to force water out of the reservoir into the inlet port, the shaft rotation being stopped when no direct voltage is applied to the motor;
- a source of said direct voltage, said source having a selected one of said first and second mutually opposed polarities;
- and
- first and second relays coupled between said source and said motor, the first relay when actuated while the second relay is deactuated applying said direct voltage with said first polarity to said motor to cause water to be drawn out of the reservoir into the pump body, said second relay when actuated while the first relay is deactuated applying said direct voltage with said second polarity to said motor to force water out of the pump body into the inlet water port, no direct voltage being applied to the motor when both relays are deactuated.
The press of claim l including a microprocessor coupled to said relays and adapted to send a selected one of first, second and third output signals thereto, the first output signal actuating the first relay and deactuating the second relay, the second output signal actuating the second relay and deactuating the first relay, the third output signal causing both relays to be deactuated.
Dependencies are inferred from the claim text.