US228436A - peters - Google Patents

Description

2 Sheets-Sheet 1.

J. LIL-BEAN.

Gate. No. 2283436. Patented June 8,1880.

Wifqeases. v Irv/211L31 304.6 g vmagg NTTE STATES PATENT FFlCE..

JAMES M. BEAN, OF \VATERTOWN, ASSIGNOR OF ONE-FOURTH OF HIS RIGHT TO CHARLES WHITTIER,

OF BOSTON, MASSACHUSETTS.

GATE.

SPECIFICATION forming part of Letters Patent No. 228,436, dated June 8, 1880.

Application filed February 27,1880.

To all whom it may concern:

Be it known that 1, JAMES M. BEAN, of IVatertown, county of Middlesex, State of M assachusetts, have invented an Improvement in Gates, of which the following description, in connection with the accompanying drawings, is a specification.

This invention relates to improvements in gates, and of that class more especially adapted for railway and street crossings, but is, it is obvious, adapted for use in other places.

In this my invention I employ a counterbalanced gate having connected with it suitable ropes, cables, or chains by which ,to raise and lower it, the free or outer end of the gate being provided with a sheave to rest upon and run along on a rope, cable, or chain permanently fixed at each end, the said rope, cable, or chain also passing between its fixed ends over a second sheave, also carried by the gate. These sheaves, besides operating with the said rope, cable, or chain, as described, also serve the additional function of guide or anti-friction rollers.

In all other vertically-moving gates for railway and other street crossings, where the gate must be very long, it has always been customary, so far as I am aware, to lift each end of the gate positively by a connected chain or chains, which are wound upon a drum.

The object of my invention is the production of a simple, light, evenly-moved, andcheaper gate-operating mechanism than now used.

Figure 1 represents, in front elevation, a sufficient portion of my improved gate to enable one to understand its operation, the parts being broken out centrally to save space upon the drawings. Fig. 2 is a rear side view thereof. Fig. 3 is a perspective view, looking at the front.

The frame-uprights a and b may be of any desired shape, size, and material suitable to sustain the gate and its actuating parts, and may set into the earth or be on a sill, 0. On the upright, I), is a shaft, (1, provided with a crank, e, by which to turn it at the proper time. This shaft has secured to it a drum, f, and at the upper part of the upright, on a stud, g, is a drum, it.

One end of the gate-lifting ropes, cables, or chains t' is connected with the drum f and the opposite end with the drum h. The drawingdown chain j, connected at its lower end with the drum f, is attached to the lower side of the gate 1. The lifting-chain it, connected at its upper end with the drum h, as shown in Fig. 1, is at its lower end connected with the top of the gate.

' With the gate in the position shown in the drawings the chain 7t will be wound about the drum h. The said chain is partially shown in dotted lines, Fig. 1, and fully in Fig. 3. The chain tis of such length and is so connected with the said drums that when the gateis raised, as in the drawings, Fig. 1, the said chain shall be wound about the drum f once or more, and when lowered the upper end of the said chain will be correspondingly wound about the upper drum.

The gate 1 has attached to it one end of the cord or chain m,which has connected with it the counterbalance n for the gate, the said cord or chain being supported by the sheave 0. The gate Z herein designated as a simple bar may be of any usual construction. Its outer end, 2, is guided by a slotted or other part of the upright a. This outer end of the gate has upon it a rotatable sheave, p, and at or near its other end it has a second sheave, r.

The rope, chain, or cable 8 (herein denominated as the leveling chain, because it keeps the gate horizontal during its movements, and which, as hereinafter described, cooperates in lifting the outer end of the gate) is connected at its opposite ends with the uprights a b or other fixed part of the apparatus. The levelin gchain passes over sheave r, and is sustained by the said sheave; but the chain at the outer end of the gate serves as a support for the sheave p, and consequently for the outer end of the gate, and keeps the outer end of the gate at the level of the inner end of the gate, as the latter end is lifted positively by the chains t'j k, as the drums f h are rotated. In this way it is obvious that the gate is both raised and lowered positively and the power required to move .it is reduced to the minimum.

If it is desired to operate a double gate, or one at each side the track, the stud y will then be made loose and as a shaft, and the drum It will be fixed to it, and the other end of the said shaft extended across the track, and supported in other uprights, like I), will be provided with a drum, like the one h, and the cords, like those 13 j in, will be connected with it and the outer gate, and to a loose drum at the lower portion of the said upright, said loose drum occupying a position similar to that of drum f.

The gate, chains, sheaves, and counter-balance will be alike at each side the track. The sheaves 1' p are so located on the gate (see Fig. 2) as to bear against the uprights, and also serve as guides or anti-friction rollers.

1. The gate and ropes, cables, or chains to lift one end of it positively, combined with the In testimony whereof I have signed my 0 name to this specification in the presence of two subscribing witnesses.

JAMES M. BEAN.

Vitnesses:

G. \V. GREGORY, N. E. 0. VVHITNEY.

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