US2483461A - Pressure head for laundry and other machines - Google Patents

Description

0st. 4, 1949. E. J. HOWLETT PRESSURE HEAD FOR LAUNDRI AND OTHER MACHINES 2 Shegts-Sheet l Original Filed Nov. 15, 1944 Inventor Edward Jhn Jibw Le it A ltorneys Oct. 4, 1949. E. J. HQWLETT ,4

PRESSURE HEAD FOR LAUNDRY AND, OTHER MACHINES Original Filed Nov. 15. 1944 2 Sheets-Sheet 2 Inventor Edward Jhn .h owleci A ltorneys Patented Oct. 4, 1949* NT OFFICE PRESSURE HEAD FOR LAUNDRY AND OTHER MACHINES Edward John Hewlett, North Finchley, London,

England, assignor to Harry Gledhill, Norman R. Gledhill, and

Malcolm Gledhill, all of Halifax, England (trading as Thomass) I Original application November No. 563,489. Divided and this 28, 1945, Serial No.

June 14, 1944 15, 1944, Serial application-June 601,992. In Great Britain 4- Claims. (01. 38- -35) This invention'is'd'esigned to provide in a convenient manner for a pressure head to adjust itself somewhat renuvaytda' buck. This may be desirable, in particular, when the thickness of the work varies'somewhati In a press according to the present invention a head is universally mounted about a point fixed without resilience when pressure is applied relatively to the said head and similarly fixed relatively to the part or parts applying the pressure; and movement of the head about the said point is controlled and pressure tends to be equalised by springs (or other suitable resilient means included in the term springs where the context permits).

The invention is illustrated by the accompanying drawings in a typical form as applied to the laundry or like press, and is a division of my copending application Serial No. 563,489, filed November 15, 1944, now matured into Letters Patent of the United States No. 2,432,017 granted to me December 2, 1947.

In the drawings:

Fig. 1 is a side elevation of the press,

Fig. 2 is a perspective view of the head mounting to a larger scale,

Fig. 3 is a side elevation and Fig. 4 a front elevation of the same.

The press shown has a bed I with pillars 2 supporting a head casting 3 which carries the buck 4. The head 5 is attached by headplate 6 to a lever l pivoted at 8 and the operation is by parts numbered 9 to 20 so as to apply the pressure by lever it from the position shown in full lines and to allow the head to swing down to the dotted line position to enable work to be arranged on the buck, all as described in the co-pending application already referred to. The head mounting with which the present invention is more particularly concerned is clearly shown at Figs. 2 to 4. The pressure lever l is in the form of a yoke With two parts or branches, 1a and 1b, one part or branch being near each end of the headplate 6. Pivotal1y.-carried between the branches is a short link 2| and the headplate is formed with suitable lugs 22 pivoted to the link on a perpendicular axis 23, forming a universal joint between about the centre of the headplate and the branches of the yoke. Near the upper part of each branch is a bracket or extension 24 and between these and points near the corners of the headplate are vertical compression springs and abutments. In this way the head will have a limited movement relatively to the yoke and will V the springs 25 may be mounted adju stitsel'f to the buck in accordance with the resistance to the resilient, pressure of the springs.

The spring loading and extent of pivotal movement are independently adjustable. For instance, between ferrules 26, 27 on studs 28, 29 carried in the yoke extension and headplate respectively. The clearance between the ends of the studs limits the movement and one stud (say that 29 in the head plate) may be fixed and the other 28 adjustable and provided with a lock nut 30. To adjust the spring 25, the ferrule 21 on the fixed stud 29 may be screwed up or down and locked in position by a lock nut 3! or other suitable means, the second errule 26 being loose on the adjustable stud 28.

I claim:

1. In a press having a buck and a head, a pressure yoke having a part near each end of the head, a link arranged between said yoke parts and pivotally connected therewith, said link having a pivot perpendicular to the axis of its pivotal connection with the yoke parts, a head plate pivotally mounted on said perpendicular pivot, pairs of spaced abutments between each yoke part and the head-plate limiting the universal movement, pairs of spaced compression springs between each yoke part and the headplate tending to equalize the pressure over the area of contact between the head and the buck, and means to adjust the compression springs.

2. In a press having a buck and a head, a pressure yoke having a part near each end of the head, a link arranged between said yoke parts and pivotally connected therewith, said link having a pivot perpendicular to the axisof its pivotal connection with the yoke parts, a headplate pivotally mounted on said perpendicular pivot, pairs of spaced abutments between each yoke part and the headplate limiting the universal movement, pairs of spaced compression springs between each yoke part and the headplate tending to equalize the pressure over the area of contact between the head and the buck, means to adjust the abutments to allow predetermined maximum movements, and means to adjust the compression springs independently of the adjustment of the abutments.

3. In a press having a buck and a head, a pressure yoke having a part near each end of the head, a link arranged between said yoke parts and pivotally connected therewith, said link having a pivot perpendicular to the axis of its pivotal connection with the yoke parts, a headplate pivotally mounted on said perpendicular pivot, a plurality of pairs of spaced abutments between each yoke part and the headplate limiting the movement between them, one of each such pair of ebutmen sb ng adj s ab e. to t ryi clearance loetvveen them,v spring mountings ,1sur-= roundingthe abutments, compression springs carried by the said mountings, the mounting sur;

rounding said adjustable abutment being fixed irrespective of the adjustment of the 'saidahutment and the mounting surrounding the secondabutment being adjustable thereon, vvherehy the adjustment of the clearanee leaveset espring loading unafiected and theijadjustmentltofnthe;..-

spring loading leaves the :clearance unaffected.

4. In a press having a buolgand ahead, movement and pressure transmitting mea ns means coupling the head to the said trammitt ng lin rised said coupling means including a link having two pivots arranged transversely with respect to, each a other, one of said pivots connected with'said" transmitting means andthe other pivot connected with means on saidheadperm-itting' pivotal movement in two-planes; of the said head aboutaXes: having their centres positiv'lyfixed relatively to the transmitting meanswithout resilienoe, resilient means hetweenthe transmitting *REEERENCES CITED .Thei'following'references are of record in the file"of" this patent:

PATENTS Number r Name Date 290,860 Cole; Dec. 25, 1883 1,035,339 FOX Aug. 13, 1912 1,129,408 Lichtenstein Feb. 23, 1915 1,2 5,511. A Cooper Nov 6, 1917 1,667,831 'Yanchenko Ii/Iayl; 1928 1,618,465; DiebQId' J lily 24;"1923 1,986,099 Beefde -Q; Q "Janl, 1935. 2,186,480" Marvin Jams, 1940

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