US1639386A - Safety device for steam mangles - Google Patents

Description

Aug. 16, 1927.

E. RUMSCH SAFETY mmcn won smu mamas Filed Luz. 5, 1925 1 Rumsth.

Patented Aug. 16, 1 927. i A

UNITED STATES EMIL RUMSGH, OF FORST-LAUSITZ, GERMANY.

SAFETY DEVICE FOR STEAM MANGLES.

Application filed August 8, 1925, Serial No. 47,779, and in Germany May 16, 1925.

The present invention concerns a safety device for steam-mangles in which, around the central cylinder, several pressing rollers are arranged. A safety device, at the entrance side of such mangles, is known which operates in such a manner that an 'oscillatable safety-board covers the entire breadth of the machine at this entrance side. When the person attending the machine comes too near 10 the pressing rollers, the safety-board oscillaltes in inward direction and releases thus a weight, which stops the'machine.

It has now been found out that, in ma chines of this type, it is important to provide a safety device also at the back side of the machine, as it sometimes happens that the attending person can also get at the material between the rollers when the machine is working, this being possible only if that part of the machine is not protected. If now such a safety-board would also be provided at the back of the machine, constructing this board in the same manner as the safetyboard at the front of the machine, but independently thereof, there would exist the danger that the material to be rolled would be forwarded into the machine from the back side of the machine,the safety-board at the front being not in the operative position, and in this manner, a person working at the front side could be injured.

In order to avoid this inconvenience, and to'create a reliable releasing device at the front and at the back of the machine, the

two safety devices are connected in such a manner that the machine can only be started from the front side, but also in this case only then, if both safety devices are in their operative position.

The ob ect of the present invention is shown, by way of example, in one form of execution, in the accompanying drawing, wherein: Y

Fig. 1 is a schematic side view of the ma- 4 chine, the parts of the machine which are not tnecessary for the understanding of the invention being omitted for .clearness sake.

Fig. 2 is a constructional detail.

At the front side of the machine the wel known safety-board a is arranged which oscillates around bolts 72. A bar a, securely guided by a link 0 is hooked with its eye 0 in to a hook 0 arranged onthe lower surface of the articulated lever f. The lower end of the bar 0 is hingedly connected to a weightlever d. The hand of the attending person, when butting against the safetyboard (1, brings this board into the position shown in dash-and-dot lines, the' hook 0 going, at this occasion, out of the eye 0 of bar 0 (Fig. 2), whereupon the weight 03 brings the lever d, and consequently also the guided bar 0, into the position shown in dash-and-dot lines, by which movement the belt is shifted from the-operating pulley onto the idle-running pulley, and the machine is stopped.

At the back side of the machine a second safety-board e is arranged which oscillates around bolts 6 this board e engaging byv its pin 6 the recess 7 of the articulated lever 7. Through the intermediary of this articulate-d lever f thesafety-board e communia cateswith the safety-board a, being hingedly connected at a. I 1

If now the attending person wants to come to the rollers from the back of the machine,

the safety-board e will have to be brought from the position shown in full lines into the position shown in dash-and-dot lines, whereby the front safety-board a, by means of the articulated lever f, is brought into the releasing .position shown in dash-and-dot lines, the weight d stopping the machine. The attending person can now manipulate between the pressing'rollers h, which, in the form of construction shown, press the material to be rolled against the heated smooth metal cylinder After having brought the disturbance in order at the back of the machine, the safety-board 6 must first again be brought into the position shown in full lines, but the machine not starting yet .again. Thence he person must 0 to the front of the mac inc and bring t e safety-board a into the ight position and, after lifting the wei ht hook the bar 0 into the hook ever f. Only after this has been done the machine can be started again.

If the erson attending the machine would try to bring the safety-board a into the operative position, shown in full lines, the back-safety-board e being in the position shown in dash-and-dot lines, this'would be impossible because the board 6 is in its deadpolnt position. 1 The attendin person cannot start the machine again if she has not brought the safety-board e into its safety position, as only in this case, will if be ossible to bring the safety board a back into its safety position and to hook the bar a into the hook c of the lever f.

At the falling of safety-board e, the pin 6 slides from one end of the recess f to the other, whereby the efiect aimed at is produced.

It is to be understood that as hereafter recited in the claim, the term closed with respect to the guards, means the positions shown in full lines in Figure l, and the term open the positions of the guards shown in dot and dash lines, these terms being considered appropriate as concisely descriptive of the positions of safety and danger.

I claim A power ope-rated machine of the mangle type, provided with front and rear safety guards hinged to suitable supports near their upper and lower edges respectively, a connecting rod, pivotally attached to said guards near their lower edges and having a slot at its rear end, a connecting pin pro-- jecting from the side edgeof the rear guard and engaging with said slot, and automatic mechanism for stopping the operation of ,the machine on the opening of either guard,

, tion with reference to its pivotal connection,

and thus to prevent the closing of the front guard, and the starting of the machine, While the rear guard remains open.

In testimony whereof I affix my signature.

EMIL RuMsoH.

Images