US424033A - John stoneham - Google Patents

Description

' (No Model.)

J. STONHHAM. AUTOMATIC HATCH OPERATING MECHANISM.

Patented Mar. 25, 1890.

INVENTUR @fim N, PETERS. Pholo-Lilhiwgrapher. Washinflm I10.

V UNITED STATES PATENT OFFICE.

JOHN STONEHAM, OF NEW YORK, N. Y.

AUTOMATIC HATCH-OPERATING MECHANISM.

SPECIFICATION formingpart Of Letters Patent N0. 424,033, dated March 25, 1890.

Application filed December 16, 1889. Serial No. 333,929. (No model.)

To all whom it may concern.-

Be it known that I,JoHN STONEHAM, of

New York city, New York, have invented an Improved Automatic Hatch-Operating Mechanism, of which the following is a specification.

This invention relates to an improvement in hatchways, and has for its object to cause an automatic opening of the hatches by the cage as the latter ascends or descends, and an automatic closing of the hatches after the cage has passed them.

The invention consists in the various features of improvement, more fully pointed out in the claim.

In the accompanying drawings, Figure l is a sectional elevation of ahatchway provided with my improvement. Fig. 2 is a horizontal section on line a: 00, Fig. 1.

The letter a represents a suitable frame for the hatchway, preferably having platforms, to which the hatch or hatches b are pivoted, as usual.

0 is the balanced cage, adapted to be raised and lowered either by hand or by steam-power.

Between a pair of the platforms of the hatchway there is secured a grooved guideway 6, in which slides a stop f. This stop is connected by rope g, passing over pulleys h h, to the forward end of hatch I), such forward end being preferably weighted. The lower portionof the guideway a need not be grooved, and is provided with an offset 6, beneath which the hatch b is received when raised, so as to clear the cage. The groove of the guideway eis T-shaped in cross-section, Fig. 2, and the cross-groove e is placed at an inclination to the line of travel of the cagethat is to say, while at the uppermost part of guideway e the cross-groove is at its closest proximity to the cage; it gradually recedes therefrom toward the lower end of the guideway. Within the cross-groove e there is received a-flange f of stop f, so thatsaid stop is also guided, not in a vertical line, but at an inclination. The inclination of crossgroove e should be such that while the stop it projects to its maximum extent out of such guideway when in its uppermost position.

The operation of the device will be readily understood. If the cage is below the hatch b and is drawn up, it will push the hatch up beneath shoulder 6, thereby lowering stop f. The cage will pass the hatch and come into contact with the stop f (now in its lowermost or concealed position) and will hold such stop in until it has entirely passed it. As soon as the cage has passed the stop, however, the weighted hatch, which had previously been placed in an inclined position, (full lines, Fig. 1,) 'will by its tendency to drop down pull the rope g. Thus as the cage gradually rises the pull on the rope will cause the stop f to rise directly below it, the stop pressing against the bottom of the cage; but while the stop rises it will more and more project out of the grooved guideway until, when it is in its uppermost position, it will be exposed to its maximum extent, (dotted lines, Fig. 1,) while the hatch will have gradually closed. On the descent of the cage it will bear upon the stop and push it down to gradually open the hatch. When the stop has arrived at its lowermost position, it will be entirely concealed within the grooved guideway, so as to be out of the way of the cage. The latter now passes the stop and then passes through the open hatch. As soon as it has clearedthe hatch, the latter closes by its own weight.

The cage may be provided with a beveled finger c, to push the hatch aside during the descent of the cage.

What I claim is The combination of a hatchway with a grooved guideway 0, having shoulder e, and inclined cross-groove 6 a stop f, having flange f engaging said groove, a pair of pulleys h h, a rope passing over said pulleys, a hatch connected by the rope to the stop, and a cage having a beveled finger, substantially as specified.

JOHN STONEHAM. Witnesses:

F..v. BRIEsEN, A. J ONGHMANS.

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