US431676A - Device for operating elevator-hatchway gates - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1.

- O. P. STANFORD.

DEVICE FOR OPERATING ELEVATOR HATGHWAY GATES.

Patented July 8,1890.

(No Model.) 3 Sheets-Sheet 2.

0. P. STANFORD. DEVICE FOR OPERATING ELEVATOR HATOHWAY GATES.

No. 431,676. Patented Jul 8, 1890.-

3 Sheets-Sheet 3.

(No Model.)

O. P. STANFORD. DEVIGB'FOR OPERATING ELEVATOR HATGHWAY GATES. No. 431,676.

Patented July 8, 1890.

UNITED STATES PATENT OFFI E.

CHARLES P. STANFORD, OF SAN FRANCISCO, CALIFORNIA.

DEVICE FOR OPERATING ELEVA TOR- HATCHWAY GATES.

SPECIFICATION forming part of Letters Patent No. 431,676, dated July 8. 1890.

Application filed )ctobor 26, 1889. Serial No. 328,297. (No model.) 7

To all whom it may concern:

Be it known that 1, CHARLES P. STANFORD, a citizen of the United States,residing in the city and county of San Francisco, State of California,have invented an Improvement in Elevator-Hatches; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to an improvement in self opening and closing hatches for ele- Vators.

It consists in certain details of construct-ion, which will be more fully explained by reference to the accompanying drawings, in which Figure l is a perspective view of my elevator. Fig. 2 is an elevation of the same. Fig. 3 is a' horizontal section.

A A are the vertical guides between which the diagonally-opposite corner-posts B of the cage travel, and by which the cage is kept in place.

C is a floor through which the cage must pass, having the hatches D hinged at opposite sides. These doors are preferably made triangular in shape, the dividingline between them extending diagonallyfrom one of the corner guide-posts to the other,wit-h a hole in the center of sufficient size for the passage of the hoisting-rope. This form and arrangement of the doors enables me to close them closely and to avoid the guiding corner-posts in their movement. These doors have hinge-shafts E suitably journaled in the opposite sides of the hatchway-opening, and upon the ends of these shafts behind the guiding corner-posts are fixed projecting lever or crank arms G. From these arms the rods H extend upward behind the guide-posts, and at the upper end have formed in or fixed to them horizontal loops or yokes I, which are adapted to travel 'upon the vertical supplemental guides J, fixed to the rear of the main guide-posts, so that the yokes may travel up and down upon the supplemental guides a distance equal to the movement of the crank-arms G, as the hatch is opened and closed. Near the lower part of this supplemental guide and in its inner edge is formed a groove or slot K, and upon the opposite or outer edge of the supplemental guide is the beveled or inclined edge, terminating ina stop at L.

the supplemental guides.

Upon each of the vertical posts of the ele- .vator-cage,which travel upon guides, is fixed a projecting block M, in such a position that it will engage the upper end of the rod H after the door has been fully opened and the rod drawn down by its crank-arm G to its lowest position. This action forces the side of the loop into the groove or notch K on the inner side of the supplemental guide, and this retains it in that position and prevents the door from moving or closing until after the cage has passed.

The operation will then be as follows: WVhen the cage is moving up, the upper por tion of it first touching the doors will lift them, opening them in opposite directions, and as the cage passes between them they will rise about their hinges until they stand in a vertical position upon each side of the hatchway. At thesame time the crank-arms G Will be turned down, drawing the rods H with them, until the horizontal yokes or loops I at the upper ends of the rods stand opposite to the slots K upon the inner edges of As the cage continues to rise, the doors are prevented from closing by the posts of the cage until the lower part of the cage has reached the upper angles of the doors, when just at this instant the projections M upon the sides of the guideposts of the cage will strike the upper ends of therods H, thus forcing the loops I into the notches K in the supplemental guides and retaining them there until after the cage has passed above the level of the doors. Just below the lugs M is a space into which the loops I are allowed to fall as soon as the bottom of the lugs M have passed above the loops I, and below this space is a projection or arm N, which engages the loop as the cage continues to rise and lifts it, so that by pulling up on the rod H and the crank-arms G the doors will be started in their closing movement by a positive action without the use of any supplemental springs or weight,.

and the closing is thus directly dependent upon the movement of the cage. As soon as this movement is commenced, the Weight of the doors closing toward thecenter presses the loops I upward against the bottom of the lug M, and it thus follows this lug upward as the cage rises until the doors are closed, the

crank-arms G, it turns the shafts upon which 7 the doors are hinged, thus opening the doors and raising them to a vertical position before the bottom of the cage reaches their upper ends. As soon as they are raised to this vertical position the loop Iwill have reached the groove or notch K on the inner edge of the supplemental guide and will immediately fall into it, and the lug M then passing temporarily 1 closes the opening at the end, so that the loop cannot fall out until after the lug M has passed below the notch. After it has passed below the notch the loop drops out of the notch, the incline at the rear edge of the guide allowing it sufficient movement for the purpose, and as the bottom of the cage is by this time within the upper angles of the open doors the cage itself will keep the doors open until such time as it has passed below the doors. NVhen the upper part of the cage has nearly reached the level of the door-opening, pinsO, which project from the inner sides of the two opposite corner-posts, engage curved elastic arms P, fixed upon the lower sides of the doors, and, pressing upon them, tilt the upper angles of the doors inward, so that they commence closing by gravitation. Their lower surfaces resting upon the upper and curved angles of the cage, they will gradually close as the cage passes down until the hatchway has been closed and covered again. By this construction the movement of the hatches is made positive," the opening and closing being controlled by the movements of the cage. The cage may be moved toa point just above the upper angles of the hatches, and the hatches commence to close. When the movement of the cage is reversed, so as to carry it down again, the doors will be again opened so as to allow it to pass.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The elevator-cage having its opposite corners guided between Vertical posts, the hatchway through which said cage is adapted to pass, triangular hatches hinged upon 0pposite sides of the hatchway and meeting, when closed, upon a line which extends between the two corner-guides, the crank-arms fixed upon the hinge-shaft of each of the doors, the rods extending from said crankarm upwardly along the main guide-posts and having horizontal yokes or loops at the upper ends, supplemental guides upon which said yokes travel, and notches in the supplemental guides in which the yokes are forced by the passing cage, so as to prevent the doors from closing until the cage has passed between theirupper angles when descending, substantially as herein described.

2. The cage traveling between guide-posts at opposite corners, the triangular hatches hinged and opening, as shown, the crankarms fixed to the hinged shafts of said hatches, the rods extending upwardly from said crankarms having horizontal loops or yokes at their outer ends, the supplemental notched guides upon which the loops move with the motion of the crank-arms, and the projecting lugs upon the posts of the cage adapted to engage the loops and force them into the notches in the supplemental guides while the cage is passing, substantially as herein described.

3. The hatches, crank-shafts, connectingrods, loops, supplemental notched guides, and the projecting lugs upon the elevator-cage operating to lock the doors and prevent them from closing while the cage is passing, in combination with the arms or hooks fixed to the cage below said lugs and so as to engage the loops and give the doors an impulse toward closing after the cage has passed up ward, substantially as herein described.

In witness whereof I have hereunto's'et my hand.

CHARLES P. STANFORD.

WVitnesses:

S. H. NOURSE, II. 0. LEE.

Images