US545507A - Car-brake - Google Patents

Description

No Model.)

F. S. JOHNSON.

GAB. BRAKE. 5 No. 545,507.I Patented sept. 3, 1895.

l www y l Nrrsn STATES f *PATENT muon.

FRANK S. JOHNSON, OF NEW BEDFORD, ILLINOIS.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 545,507, datedSeptember 3, 1895. Application ned rune 22, 1895. seria No. 553,707. (No moda.)

ism which shall be simple and inexpensive in construction and which may primarily be operated with a very small expenditure of power,

whereby the position of the brakesshoes willbe changed and the supporting-links thereof Y inclinedin such manner that said shoes willv be automatically forced with considerable pressure against the rims of the wheels.

Other objects and advantages of the invention will appear in the course of the subjoined description.

The invention consists in certain novel features and details of construction and arrangement of parts whereby certain advantages in .point of simplicity and efficiency are attained, l

as hereinafter fully described, illustrated in the drawings, and finally pointed out 'in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a sufficient portion of a car to illustrate the application of the improvement thereto. Fig. 2 is a detail perspective view of one of the brake-shoes, the supporting-link therefor, and the guiding-cylinder within which said link.- slides. Fig. 3 is a detail sectional view through the guiding-cylinder, showing the internally-arranged link and a portion of the lower link in elevation.

Similar numerals of reference designate corresponding parts in the several figures of the drawings.

Referring to. the accompanying drawings, 1 designates a car or a suicient portion thereof to illustrate the application of the present improvement, and 2 the wheels thereof.

Secured to the bottom sill or other convenient point of the 'framework of the carbody are two cylindrical castin gs 3, one for and adi jacent to each wheel, as shown. These cylinders may be of any desired length and diameter and are preferably formed with closed upper ends, being pivotally secured in any convenient manner firmlybeneath the carbody and preferably outside of the car-wheels. Arranged within each cylinder is an elongated link 4, extending the Aentire vertical` length of said cylinder and secured therein at its upper end by the same means which connects the cylinder to the carbody orin narrow portion which passes through and en gages the lower end of the internally-arran ged link 4 within the cylinder and a lower expanded portion the cross-bar of which passes through a horizontal opening 6 in the upper end of the brake-shoe, (indicated at 7.) By means of this construction the link 5 may slide upwardly within the cylinder, being held in place by the link 4 and guided in its vertical movements by both said link and the cylinder. The length of the link 4 within the cylinder 3 and the brake-shoe link 5 are so regulated that the brake-shoe may rise a distance about equal to the vertical length of said shoe.

By reference to the drawings it will be ap parent that in whichever direction the car is traveling, when the brake connections are 0p erated in such manner as to bring the shoes into contact with the wheels, only a slight pressure is needed to cause the proper shoe to bind against the tread of its wheel with sufficient force to carry said shoe upward into the position shown in Fig. v1, in which position the links which support said shoe will be inclined and the distance between the brakeshoes upon each side of the truck will be increased. As there is little or no give or yield to the brake-rods, beams, and other connections, it will be seen that as one of the shoes is carried upward bythe rim of the wheel it will be forced with greatly-increased press- 9 ICO relieve themselves from the Wheel when the oar stops or may be Withdrawn therefrom while in motion by means of the brake connections.

The mechanism described is very simple in construction and may be manufactured and applied to any form of car or truck,whether for street or railway use, at very small expense.

ItV will be apparent that the length and form of the guiding-cylinders, and also the intermediate links which connect with the brakeshoes, may be changed, and that other changes in the form, proportion, and minor details of construction may be resorted to Without departing from the spirit 0r sacricing any ofthe advantages of this invention.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is-

l. In a car brake mechanism, the combination with the car body, of a guiding cylinder or casing secured to and suspended beneath the same, a brake shoe suspending link capable of sliding Within said cylinder or casing, and a brake shoe carried by and suspended from the lower end of said link, substantially as and for the purpose described.

2. In a car brake mechanism, the combination with a guiding cylinder or casing connected to and suspended beneath the frame of a car or truck, of an elongated link arranged within said guiding cylinder or casing, a brake shoe having a transverse horizontal opening near its upper end, and an intermediate link having said shoe suspended upon its lower end and capable of sliding at its upper end Within said guiding cylinder or casing and the internally arranged link, substantially in the manner and for the purpose specified.

In testimony that I claim the foregoing as my own I have hereto afxed my signature in the presence of two witnesses.

FRANK S. JOHNSON.

Witnesses:

WM. HART, FRED HART.

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