US588651A - mcnamara - Google Patents

Description

(No Model.)

M. MGNAMARA.

BLBVATOR SLLPPBR. No. 588,651.- Patented Aug. 24,1897;`

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UNITED STATES;

PATENT OFFICE.

MARTIN MCNAMARA, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO .EDVARD KELLY, OF SAME PLACE.

ELEv-AToR-SLIPPER.

SPECIFICATION forming part of Letters' Patent No. 588,651, 'dated August 24, 1897. Appnaaon nea numana-1397. lsean No. 620,439; (Nb'aodei.)

To @ZZ whom it may concern.' t

Be it known that I, MARTIN MCNAMARA, a

citizen of the United States, residing in the city, county, and State of New York, have invented certain new and useful Improve-v ments in Elevator-Slippers, of which the folerence to the accompanying drawings, inl

which- Figure 1 is a fragmentary vertical section of an elevator-well and the top and bottom beams of an elevator-car, showing my improved slipper as adapted for the top and vbottom of the car, the slippers' being shown partly in elevation and partly in axial section; and Fig. 2 is a fragmentary cross-section of the well, showing the upper slipper inA plan and partly in section.

Fig. 2 on the line 2 2 of Fig. l. Y

Referring to the drawings, let A indicate an elevator-well; B, the vertical guidingbeams thereof; C, the guiding-tracks on these beams; D, the safety-rack between these tracks; E, the top beam of an elevator-car; F, the bottom beam of the car; G, the top slipper; G', the bottom slipper, and H aluvbricator.

In elevator-Wells two or morevertical guidebeams B are usually placed at the corners or sides of the well for carrying the customary rack D and the guiding-track C, the latter being generally placed on each side of the rack. The top beamE and bottom beam F or other part of the car is generally notched or forked at d to fit over the track C, having fingers' b at the outer sides of .these tracks which. loosely t the latter for affording'a general guidance for thercar. One of these parts of lthe elevator usually! carries .the safety-catch c opposite to'and for engaging the safety-rack -1 andin' Eig. 2.

Fig. 1 is cut` approximately on the line l 1 of Fig. 2, and

gagement K -the inner end of the flange m are sufciently the shoe from the bracket.

D in case of atoo-rapid descent. With suchl construction it is found-desirable to suppress any rattling or vibration incident to the nec- 'essarily' loose it between the car and the ployed for engaging the guiding-tracks both above and below'the car, and is slightly differentiated in construction to adapt it for the position at whichit is to be employed.

Referring to .the drawings I will now describe in detail the preferred form of my improved slipper as adapted for use at the top of the car, as shown in the upper part of Fig.

In this construction the slipper comprises a hollow frame or bracket I, having a bottom or fastening plate d, bearing against the top beam or plate E of the elevatorA and "adj nstably secured thereto by bolts e, traversing an elongated slot f in the plate, from the ends of which plate legs g rise to a suitable distance, which legs carry on their outer ends a tubular arm J, having a cylindrical socket'h lin its interior opening at' its outer end toward the guide B and closed at its inner end by a wall 1l. Externally the arm J has a smooth and preferably cylindrical sliding surface or head j at its outer end,`which head receives and carries theV shoe K of the slipper. lThis shoe consists of a verticalv plate l, having an integral inwardly-extending flange m, having a smooth internal socket n of like size and dimensions to the head j of the bracket and fitting over and sliding on this head, so that the shoe is movably carried from the bracket by this en- The outer end of the head j and extended to overlap; in their engagement to an extent suitable for the proper support of Ribs o between the plate l and flange mI aiford sufficient reinforce to prevent fracture of the shoe. The outer leg g of the bracket I is curved inwardly as it approaches the arm 'J to provide room for the inward movementof the shoe on the arm. V

The shoe K is suitably adapted to engage the track C, preferably .having a .vertically vgrooved or recessed outerfface` receiving the track, the latter being embraced at both sides IOO by projecting wings or flanges p, extending outwardly from the sides of the plate Z. The flange p at the inner side of the track may project into the recess q at the side of the rack D. The flanges p prevent any lateral vibration of the car, while the surface r, en-

gaging the front face of the track, prevents vibration of the ear toward the latter.

To afford a yielding resistance to the vibrations of the car 'toward the track and to compensate for imperfections in the construction of the latter and give a yielding instead of a rigid fit for the shoe against the track, I provide a spring or other suitable elastic provision M between the bracket and shoe, preferably inclosing this spring within the confined chamber formed by the sockets h and n of these parts, so that the combined depth of these sockets, less the extent of their overlap, can be used, and a relatively long spring with its corresponding advantage of great elasticity can be employed. To adjust the tension of the spring, I prefer to tap a screwthreaded hole s in the wall ol of the bracket, into which hole is screwed an adj Listing-screw N, which may be locked by a set-nut O, which screw acts against the spring through a sliding disk t.

For additional strength and guidance and to facilitate assembling of parts I prefer to provide a pin P within the spring M, which pin is preferably riveted to the shoe K through a hole in the plate Z thereof and extends well toward the inner end of the socket h in the bracket, substantially fitting the interior of the spring M. This pin prevents displacement of the spring and limits its adjustment, as well as serving as a positive stop to inward movement of the shoe when the plate t is adj usted outward to a sufficient distance. For lubrication between the shoe and track I prefer to provide the shoe with an oil well or pocket Q, which is preferably formed as a recess in the upper part of its outer face, closed at rear by a wall u, which inclines outwardly, and at top by an inclined wall w, both walls having preferably screw-threaded holes t passing through them, by means of which a lubricator or a fallow-cup II can be connected for supplying lubrication to the pocket. The pocket is preferably filled with waste R.

To provide a suitable bearing-surface and to provide for its renewal when worn, I prefer to employ a separate wearing-plate S for the shoe, which may be of any suitable material and construction. That shown is provided with inwardly-extending flanges at top and bottom, which fianges embrace the shoulders y in the outer face of the wall Z.. The end of the pipe z leading to the pocket Q may be extended above the upper flange a: to assist in retaining the wearing-plate in place.

An oil and vent hole T maybe provided in the arm .I for lubricating the parts. Lubrication supplied here will be retained within the chamber formed by the two cup-shaped sockets, so that there will be slight leakage, if any at all.

The lower slipper G' is substantially identical with the upper slipper and bears the same letters of reference for its several parts, with the exception of those parts materially differ ing in construction, which are the shoe K', which is here extended inwardly to meet the bracket I, which it is generally necessary to locate farther from the track C below than above the car. The shoe here has no oilpocket and terminates with its top and bottom flanges y, which are of like separation to those of the shoe K, so that a plate S may be used for either slipper. The pin P is here surrounded by a collar U and an extensioncollar V, in order that the same length of spring M may be used. The socket rn' is here only dressed at its inner end.

I prefer to dispose the upper slipper to embrace one track C and the lower slipper to embrace the other track C of a vertical guide B, thus cqualizing the wear. This is shown in Fig. 2. It is not essential that this should be the case.

In operation the slippers will steady the car, preventing any lateral vibration transversely of the axis of the arm J and elastically resisting vibration longitudinally of this arm. The tension of the spring will be just sufficient to suitably restrain tendency to the latter vibration. Thus the shoe will readily yield to irregularities in construction, while not affording too great a frictional resistance to the motion of the car through the well. When the shoe is slightly rotative, as shown, it can oscilla-te around the axis of the arm J to the slight extent necessary to compensate for imperfections in the alinement of the sides of the track, so that no binding need occur from this cause.

Vhat I claim isl. In elevator-slippers and the like, the combination with a shoe for preventing vibration of a car, having a bearing-face for directly engaging and sliding on the guidetraek of an elevator-Well, and movable toward and from and immovable laterally of said track, of a bracket adjustable toward and from said track, movably carrying said shoe, means pressing said shoe toward said track, and an adjustable connection for fastening said bracket to an elevator-car.

2. In elevator-slippers and the like, the combination with a shoe for preventing vibration of a car, having a bearing-face for directly engaging and sliding on the track of an elevator-well, and movable in direction toward and from the track and immovable laterally of said direction,of a bracket adapted to be fixed to an elevator-car, having a lateral portion at right angles to such track, said lateral portion movably carrying said shoe, and a spring between said bracket and shoe holding the latter toward said track.

3. The improved elevator-slipper, compris- IOO IIO

ing a bracket having a tubular arm, and adapted to be connected to an elevator-car, in combination with a shoe for retarding vibration of the car, having a hard bearingface for engaging and sliding on the track of an elevator-well, and carried by said arm and sliding axially thereof toward and from the track, and immovable laterally of the axis of said arm, and a spring within said arm for forcing said shoe outwardly thereof toward such track.

- 4. For elevator-slippers, abracket adapted to be fastened to an elevator-car and having a cylindrical arm, in combination with a shoe for retarding vibration of the car, having a hard surface for bearing against the guidingtrack of an elevator-well, said shoe embracing said arm,l sliding thereon toward and from the track, immovable laterally of the axis of the arm and having an oscillatory movement around such axis, and a spring reacting against. said shoe and bracket, re-

' sisting movement of the former away from the track, substantially as and for the purpose set forth.

5. The improved elevator-slipper, comprising a bracket I, adapted to be fixed to a car, and having a tubular arm J, having an outer head j and an inner socket h, in combination with a shoe K for closely fitting and Vengaging the track of an elevator-well and retarding vibration of a car, -having a socket n fitting over and sliding on said head j, and a spring M inclosed within said sockets and reacting against said shoe and bracket for forcing the shoe towardl the track, said shoe held by said bracket rigidly against movement laterally of said arm. y

6. For elevator-slippers, a bracket I, adapted to'be fixed to a car, and having a hollow arm J, in combination with a shoe K having a surface for directly engaging the track of an elevator-well, movably carried by said bracket, a spring M in said hollow7 arm and reacting against said shoe, and means for adj usting said spring, said shoe held by said bracket rigidly against movement laterally of said arm.

7. For elevator-slippers, -a bracket I, adapted to be carried by a car, in combination with a shoe K for preventing vibration of the car, having a surface for forcibly engaging an elevator-track, carried by and sliding on said bracket, having a pin P projecting into the bracket, and a spring M between the shoe and bracket surrounding said pin and forcing the shoe outwardly from the bracket, said shoe held by said bracket rigidly against movement laterally of said arm.

8. For elevator-slippers and the like, a shoe K for preventing vibration of a car, closely fitting and sliding on the guiding-track of an elevator-well, said shoe movable toward and from the track in one direction and immovable angularly of such direction, having a lubricating-pocket Q in its upper part, means for movably carrying said shoe on an elevator-car, and means resisting movement of said shoe.

9. The improved elevator-slipper comprisving the bracket I having plate d, legs g,-slot f, arm J and socket h, in combination with a shoe K carried by said arm, having shoulders .y and Iianges p, a spring between said shoe tion, a member movably carrying said shoe,

means for fixing said member to an elevatorcar, and a spring resisting movement of said shoe relatively to said member away from such track.

11. The combination for an elevator-steadier, of a shoe for preventing vibration of an elevator-car, having a bearing-face for directly and forcibly engaging and sliding along the guiding-track of an elevator-well, a member carrying said shoe, means for xing said member to, an elevator-car, a connection between said shoe and member permitting movement of said shoe in direction toward and from such track and preventing its movement laterally of such direction, and a spring re- IOO acting against said shoe and resisting its movement away from such track.

l2. The combination for an elevator-steadier, of a shoe for preventing vibration of an elevator-car, having a bearing-face lfor directly and forcibly embracing, engaging and holding it in engagement with the track, means for xing said member to an elevatorcar, and a 'connection between said shoe and member permitting oscillatory movement of said shoe on an axis perpendicular to the direction of said track.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

MARTIN MCNAMARA.

W'itnesses:

GEORGE H. FRASER, THOMAS I. WALLACE.

'sliding along the guiding-track of an elevator-well, a member carrying said shoe, and

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