Patent GB-443120-A (GB)
Title: Improvements relating to ironing machines
IPC: D06F71/06
Filed: 1934-09-21
Abstract: 443,120. Ironing-presses. HYDRAULIC BRAKE CO., 84, West Hancock Avenue, Detroit, Michigan, U.S.A. Sept. 21, 1934, No. 27184. Convention date, Sept. 22, 1933. [Class 138 (ii)] In an ironing-press the head is manually moved to operative position wherein it is locked by a toggle mechanism and the buck is raised into pressing engagement therewith by the manual generation of fluid pressure. Manual operation of the member that was operated to generate the fluid pressure, but in the reverse direction, relieves the pressure and also unlocks the head, which then moves to the inoperative position under the action of its restoring springs. The buck 158, Fig. 13, is yieldingly positioned on its support 126 by the sliding engagement of pins 164 in lugs 168, with springs 170 interposed between the lugs and the buck. The buck is also provided with pins 166 which are engaged by pistons 144 working in cylinders 136, 140, Fig. 8, which are interconnected by a pipe 150 and derive pressure through a pipe 152 from a pump cylinder 28, Fig. 11, containing a manually operated piston 64. The pipe 152 between the cylinder 136 and pump outlet 56 contains a fluid pressure switch and a one-way valve ; the other cylinder 140 communicates through a pipe 156 with a chamber 78 beneath and communicating with a pressure relief valve 94 which may be opened against the spring 106 automatically by a predetermined pressure in chamber 78 or manually in the normal course of press-opening. The chamber 80 with which the chamber 78 communicates when the valve 94 is open communicates with a reservoir 34, Fig. 10, and the latter communicates through a one-way valve 54 and passage 52 with the pump cylinder 28 so that a closed fluid-pressure system is formed. The rod 72, Fig. 11, of the piston 64 of the pump is connected to an arm 112, Fig. 3, fast on a shaft 110 to which an operating lever 120 also is secured so that on swinging the lever 120 clockwise fluid-pressure is generated in the system to act on the pistons 144 and raise the buck. An arm 212 loose on the shaft 110 is linked to an arm 206 of a bellcrank lever 200 of which the other arm 202 in conjunction with a link 204 pivoted to an extension 190 of the head-lever 186 pivoted at 184 constitutes the toggle for closing the press and holding it closed. The fluid pressure is relieved by the counterclockwise rotation of the lever 120 and shaft 110 whereby the pressure relief valve 94 is opened by the engagement of another arm 116 fast on the shaft 110 with a lug 118 on the valve spindle 96. Towards the end of the counterclockwise rotation of the shaft 110 an adjustable screw on the arm 112 engages the arm 212 to swing the latter counterclockwise and break the toggle and open the press. A lamp in series with the fluid pressure switch in the pipe 152 is illuminated behind a green window in one of the bifurcations of the head lever 186 when the fluid pressure switch is closed at a predetermined pressure and another lamp in parallel with the heating element in the press head is illuminated behind a red window in the other bifurcation of the head lever when the heating element is switched on. The reservoir 34 is provided with a manually displaceable piston 42, Fig. 10, for varying the operating pressure of the fluid operating the buck. The buck is provided with an upwardly and downwardly extending flange 162, Fig. 3, and a groove 172 which collects water of condensation and passes it through pipes 174 into the compartment 132 of the buck support having a drain plug.