US391615A - Elevator-guard - Google Patents

Elevator-guard Download PDF


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US391615A US391615DA US391615A US 391615 A US391615 A US 391615A US 391615D A US391615D A US 391615DA US 391615 A US391615 A US 391615A
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    • B66B13/00Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
    • B66B13/02Door or gate operation
    • B66B13/14Control systems or devices
    • B66B13/16Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position


2 Sheets-Sheet 1.
(No Model.)
No. 391,615. Patented Oct. 23, 1888.
N. PETERS, Phom-Luhcgnphur. Wnxhingmn. n. c,
(No Model.) 2 sheets sheet 2.
N0.391,6 15. Patented Oct. 23, 1888.
attczvtma N. PETERS. Photo-Lithographer, Wnhingmn 0.0
rrnn dramas Parent tries,
SPECIFICATION forming part of Letters Patent No. 391,615, dated Qctober 23, 1888.
(No model.)
To aZZ whom it may concern.-
Be it known that I, WARREN D. HoUsE, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Automatic Guards for Hatchway-Elevators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
My invention relates to certain new and useful improvements in automatic gates for hatch- Way-elevators, and particularly to features of construction,as hereinafter described, whereby the device may be readily and quickly adjusted in place when originally installed and said adjustment altered thereafter to correspond to changing conditions of wear.
In the accompanying drawings, illustrative of my invention, Figure 1 represents a side elevation of one form or modification of the same in position for use. Fig. 2 represents on a larger scale a like view, partly broken away, and showing the details of construction of the gateoperating mechanism. Fig. 3 represents an end elevation of the gate and its operating connections. Fig. 4 represents the same partly in section. Fig. 4. represents in detail the adjustable connection between the gate and its operating-shaft. Fig. 5 repre sents a side elevation of a modification of my invention, and Fig. 6 represents an end view thereof.
Similar letters of reference indicate similar parts throughout the several views.
Referring to the figures upon Sheet 1 of the drawings,-A indicates the cage or car of an elevator hatchway, provided with suitable means for raising and lowering the same, said car being provided with a double cam-surface, a, projecting from one of its sides. Across the hatchway at each of the floor-landings thereof are located gates f, pivoted loosely upon a revoluble rOckshaft, m, which turns freely in a bearing, d, secured to a post, It, at one corner of the hatchway-opening. A catch, 9, attached to an opposite post receives the free end of the gate when said gate is in a horizontal position, indicated in dotted lines in Fig. 1. The rock-shaft a: is provided at one end with the crank-arms y integral therewith,
and upon which is mounted the 100SB1y'tLlIl1- ing friction-roller b, said friction-rollcr being located in the path of movement of the double cam-projection a. The opposite end of the rock-shaft, after passing through the opening in the gate, is of square or hexagonal crosssection, as represented, respectively, at m in Figs. 1 and 2 and in Fig. 4. Upon the squared or hexagonal portion is located the oranlearm 0, held in place by a nut, n, or its equivalent, against longitudinal displacement. The said crank-arm has an aperture, 8, corresponding in shape to the cross-section of the portion m of the rock-shaft, and is therefore locked thereon so as to turn with therock shaft. At its outer end the crank-arm c is connnected with the gate f by means of a bolt, t, passing through both crank-arm and gate, as shown.
The construction described enables me to adjust the device in place with respect to afioor or landing of an elevator-shaft with convenience and expedition. To accomplish thisl first erect the post is at one corner of the hatch way-opening and ate convenient height upon the inner face of said post attach the bearing d, having previously inserted the rockshaft m in place, said rock-shaft being provided with its crankarm y and roller 7). The elevator-car is now raised until the roller 1) isjust clear of the extreme end of the cam-surface a; the gate f is then placed upon the rock-shaft x and brought to a horizontal position, whereupon the crankarm 0 is also placed on said shaft. A hole is then bored in the gate opposite the aperture tin the free end of the cranlearm and theboltt' is inserted, thereby locking the gate f to the rock-shaft x. The advantage of employing these connections is that without particular care as to the exact location or position of the post It or the cam a with relation thereto the gate can be, at the place of installment and without the exercise of particular skill on the part of the workmen, immediately and exactly connected to the leverage system, so as to assume the horizontal position at the exact point where the cam leaves the frictionroller in the upward and downward move ments of the car A. Should the post It in the course of time be somewhat displaced by warping or the like, or should the cam be worn away materially, thereby failing to raise the gate to a sufficient height during the operation of the device, this displacement may be compensated for by removing the crank-arm c from the rock-shaft m, and then replacing it at a different angle with respect thereto, bringing the roller to the position above referred to, placing the gate in the horizontal position, as above, and then boring a new bolt-hole for the reception of the bolt 73.
The general operation of the construction will be apparent. Thus, when the car has passed any particular landing, the gate f is in the horizontal position, its free end resting in the catch g, and the friction-roller b is at the inner limit of its throw. When the car rises or descends, as the case may be, the cam projection a comes in contact with the roller 1), and the roller with its cranlcarm y is thrown back gradually, thereby revolving the rockshaft or, and with said rock-shaft the crankarm 0. The crank-arm 0, through the intermediacy of the bolt 2', revolves the gate f until the latter is made to assume a vertical or nearly vertical position, thereby permitting entrance to and exit from the carat the moment that said car is opposite the landing. Upon the upper edge of the gate f is located a spring, a, which is adapted to strike against a projection, w, upon the post and be slightly compressed thereby when the gate f is at the upper limit of its path of movement. \Vhen, now, the car proceeds to an upper or lower landing, as the case may be, the spring 1;, as soon as one of the cam-surfaces comes opposite the roller 1), forces the gatef downward from the vertical position and against said cam surface and thereafter the weight of the gate will cause it to descend, the roller being permitted by the oppositely inclined surface of the double cam to resume gradually its original position until, when the car has passed, the gate is once more in the horizontal plane and bars the hatchway.
When the hatchway is located in the center of a building and is accessible from opposite sides, it is evident that two gates will be employed for each landing. In this event I provide each of the said gates with a rockshaft, :c, crank-arm c, and bolt 2'. It is not necessary, however, that each should be provided with the roller 1), or that there should be two cams, a, operating together. To obviate this necessity I connect the opposite rock-shafts x by means of a rod, w, entering openings in pro jections c at the inner ends of the rock-shafts 0c and being locked in said openings against rotation. I
In the form of my invention illustrated in Figs. 5 and 6 the gatefis connected with 'a shaft, 00, bya crank-arm, c, and bolt i in asimilar manner to that hereinbefore described with reference to the preceding figures of the drawings. The rock-shaft 00, however, in this case is located at the rear of the post It, and the roller I) is mounted upon an arm, 2, connected tiplied in its transmission to the rock-shaft 00. v
This arrangementof parts I employ when, from particular conditions of use, it is impracticable to impart too great a movement of oscillation to the roller I). WVith this construction itis obvious that it is not necessary for the crankarm 2 to project at so great an angle with respect to the car A, and therefore the shock of impact of the cam 11 upon the roller 1) is less than in the structure shown on Sheet 1. Moreover, the gate f, when in its vertical position, does not project over the entrance to the car, and persons may therefore enter and pass out of the car without liability ofstriking against the gate.
In Fig. 6 I have illustrated with respect to the modified form of my invention the means hereinbefore described for simultaneously operating opposite gates of a centrally-located hatchway by means of a single cam-surface, the operating-shafts of said gates in this instance being connected, as before described, through the intermediacy of the rod to.
Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-
1. The combination, with an elevator -car provided with a double cam-surface upon one of its sides, of a roller located in the path of movement of said double cam-surface, a crankarm upon which said roller is mounted, a rockshaft connected with said crank-arm, a hatchway-gate having an aperture through which said rock-shaft passes freely, a crank-arm fitting over said rock-shaft beyond the gate and locked against rotation thereon, and a bolt for securing the lower end of said crank-arm to the hatchway-gate, substantially as described.
2. The combination, with an elevatorcar provided with a double cam-surface upon one of its sides, of a roller located in the path of movement of said double cam-surface, a crankarm upon which said roller is mounted, a rockshaft having a shorter crank-arm than that upon which the roller is mounted, a link connecting said crank-arms, a hatchway-gate having an aperture through which said rock-shaft passes freely, acrank-arm fitted over said rockshaft beyond the gate and locked against rotation thereon, and a bolt for securing the lower end of said crank-arm to the hatchwaygate, substantially as described.
In testimony whereof I affiX my signature in presence of two witnesss.
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