US38387A - Improvement in sliding-door sheaves - Google Patents

Description

UNITED STATES PATENT OFFICE.

ROBERT G. HATFIELD, OFNEW YORK, N. Y.

IMPROVEMENT- IN SLlDlNG-DOOR. SHEAVES.

Specification forming part of Letters Patent No. 38,387, dated May 5, 1863.

To all whom it may concern,.-

Be it known that I, ROBERT G. HATFIELD, of the city of New York, in the county and State of New York, have invented a new and Improved Sliding-Door Sheave, andI do hereby declare that the following is a full', clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in Which- Figure 1 is a section. Fig. 2 is a plan. Fig. 3 is a side elevation. Fig. 4 is an end elevation, and Fig. 5 isaperspective view4 Figs. 6, 7, S, and 9 are drawings exhibiting a modication in the application of one of the principles of the invention.

The nature of my invention is twofold viz., rst, providing a device by which the height and position of the door (or gate) may be readily adjusted lin suspension-sheaves; and, secondly, coating the periphery of the sheave-wheels with a tire consisting of a material that`will cause them to work Without noise.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

First, in respect to the adjusting apparatus, I secure the axle A, Figs. 1 and 3, to the sliding blocks B B, and form a groove, C, in which said blocks can slide, by securing the guides D D to the suspension-bars E E. Attached to said guides at the top is the fla-nge F, and through said iiange I insert the screws G G. These screws have abearing upon the blocks B B', and can be turned by the fingers by means of the roseheads, as shown. By raising or lowering said screws the height of the door H, Fig. 4, in relation to the wheel I and the beam J may be readily adjusted.

To connect the suspension-bars E E with one another, I extend a narrow bar, K, over the top ofthe wheel and weld it to said suspen sion-bars. I also propose to make said connection by means of devices shown in Figs. 6 and 7, in which the guides D D forthe blocks B B are so constructed as to prevent the separation of the bars E E, in which cases the connecting-bar K will not be necessary.

The above is one method of applying ad- Y justing apparatus to the sheave. I now proceed to describe another, in which provision is made at the connection of the suspension-bars with the door to effect the same purpose. I unite the lower ends of the suspension-bars E E by means of the plate N, Fig. 8, and suspend the door upon said plate at the end of the screw O. This screw works through the nut P, and is provided with a rose-head to be Worked by the fingers. By raising or lowering said screw the door can be correspondingly elevated or depressed. The plates Q Q7 Secured to the sides of the door, coniine the bars E E in the groove on the face of said plates, and so insure their continuing in a perpendicular position.

l In Fig. 9 the same apparatus is shown in a modiedform. In place of the screw 0, the adjustment is made by means of the eccentric R, the shaft or spindle of which is extended to the edge of the door, as shown at S, and is there pro vided with a pawl and ratchet to prevent the recoil of the eccentric, the latter being l turned by means of a screw-driver inserted into the groove T.

I am aware that doors and gates have been hung so as to slide by means of suspensionsheaves, and that floor-trucks have been constructed with a muffling material applied to the periphery7 of their wheels, and I do not claim those devices as my invention.

1. The application of adjusting apparatus to the bearings of sliding-door sheaves, for the purpose described.

2. rEhe construction of the wheels of slidin g-door sheaves with a tire or periphery composed of a mufiing or sound-deadening material.

R. G. HATFIELD.

Witnesses:

JOSEPH IRELAND, O. P. HATEIELD.

Images