US618230A

US618230A - Car-brake

Info

Publication number: US618230A
Authority: US
Publication date: 1899-01-24
Anticipated expiration: 1916-01-24

Description

T. o. MILLER. GAB BRAKE.

(Applicatinnflled Feb. 23, 1897.) (N o H o d e I Patented Jan. 24, I899.

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Patentedxlan. 24. I899. T. 0. MILLER.

GAR BRAKE.

(Application filed Feb. 23, 1897.)

2.Sheets-Sheet 2- (No Model.)

. I I I 9 h nII/II 'rA'rns Uivrrnn THOMAS O. MILLER, OF HOUSTON, TEXAS.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 618,230, dated January 24, 1899.

Application filed February 23, 1897. Serial No. 624,635. (No model.)

To all whom it may concern:

Be it known that I, THOMAS O. MILLER, a citizen of the United States, residing at Houston, in the county of Harris and State of Texas, have invented certain new and useful Improvements in Oar-Brakes and I do hereby declare the following to be afull, 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 brakes for cars or other vehicles, and has for its object to so construct the same that its operation will be quick, effectual, and great leverage power be furnished.

lVith these and other objects in view my invention consists in the construction, arrangement, and combination of parts and in the various details thereof, as will be first fully pointed out in the specification and then claimed.

In the drawings forming a part of this speci fication,and inwhich like symbols of reference represent corresponding parts in the several views, Figure 1 is a vertical sectional view of inyimproved brake. Fig. 2 is a similar view, partly in section. Fig. 3 is a plan view of the ratchet-wheel case, partly broken away, showing a different form of spring for actuating the pins or pawls. Fig. 4 is a sectional plan view on line l 4.- of Fig. 1. Fig. 5 is a similar view to Fig. 4 on line 5 5 of Fig. 1. Fig. 6 shows pawl and ratchet-wheel for holding the brake when being operated. Fig. 7 is a plan view of a modification of spindle upon which are journaled bevelgears for communicating motion from one of the gears to another. Fig. 8 is a view of one of the bevel-gears; and Fig. 9 is a modification of the device, the ratchet wheel case being partly broken away to show the interior thereof, the locking spring-pins being located at top and bottom of the gears instead of at the sides.

A represents the fioor of the platform of the car B,the dash-rail of the same; O,the ratchetwheel case, and D the lever for operating the same.

E is the rod or shaft that runs from the ratchet to the clutch; E, the spool upon which the brake-chain is wound.

b is the top bevel and ratchet wheel, keyed to the rod E'; b, the bottom bevel and ratchet wheel, loose on sleeve F, and 0 gears for communicating motion from the upper to the lower gears b b. d is the shaft on which bevels c are journaled, said shaft being screwed onto sleeve F and having nuts d for holding said bevels on the same.

ff are spring pins or pawls for upper and lower gears, having springs f for actuating the same, said pawls locking the ratchet or bevel wheels when the lever is operated, the upper ratchet running from left to right and the lower from right to left, as will be apparent from the drawings. Thus it will be seen that when the lever D is operated the casing C will be rotated, carrying the gear Z) and shaft E to the right, winding the chain upon the spool E; The gear I) in the meantime is locked against forward motion with relation to the casing by pawl f but said pawl when the casing is rotated rides freely over the teeth of gear bf. The sleeve F being normally locked against rearward motion by the pawl 71, it will be apparent that when the crank-handle is operated only a forward motion is possible, and when it is desired to release the brake the pawl it may be thrown out of engagement with the ratchet J or the foot-pin be depressed, allowing the spool to unwind.

G is the bottom of the ratchet-casing, which is secured upon sleeve F by being screwed upon the same and is provided with internal screw-threads g, which engage with external threads upon the sleeve, and being provided with set screw or screws 9 H is a plate that fits around sleeve F and fastens thesame to the dash.

J is a ratchet-wheel keyed to sleeve F and engaged by dog h, pivoted on the platform of the car.

K is a sleeve or hearing connected to the platform by means of screws or bolts j, the shaft E being journaled in the same.

K K represent the upper and lower portions of the clutch by means of which the device is locked and unlocked at pleasure by foot-pin k, the clutch K being held'normally locked by means of spring 7t.

m is a pin connecting the lower portion of the clutch K with spool E, said spool portion of the shaft being separate from the upper portion.

M M are brackets which brace and hold the device in place, said brackets being attached by suitable bolts on m to the under side of the platform. Q P is a bracketin which lever 70 is journaled, said bracket being secured by suitable bolts on the under side of the platform. The outer end of the lever 70 is preferably forked, so as to embrace the collar or clutch K, being held in place on the same by means of flange p on the clutch.

R is a screw-bolt entering the spool E and adapted to attach the brake-chain S thereto. The lower end of shaft E is made square, as also the upper portion of the clutch K, so as to prevent it rotating on the shaft, but permitting a limited vertical movement of the same. On the upper end of the shaft E is an annular groove to correspond with an internal groove on the top of the ratchet-wheel case, said grooves being for the purpose of receiving bearing-balls t.

In Fig. 3 is shown a difierent form of spring for actuating the spring-pins; but I prefer the form shown in Fig. 1, as the tension of the springs may be regulated.

The operation of my device is as follows: By turning the lever D the ratchet-casing is rotated, communicating motion to the gears within, which in turn operate the shaft and the brake-chain is wound thereon. As already stated, the gear I) is keyed to shaft E, and the pawls f locking the same against backward motion the rotation of the casing C will operate said gear, which communicates motion to gears c, which in turn operate gear 1), said gear I) being locked against forward motion. Then it is desired to release the same, the foot-pin is depressed and the mechanism is immediately set free; or, if desired, the dog It may be released (which is normally locked) from the ratchet-wheel J by the foot of the motorman, so that the sleeve F will be freed, and only partially or wholly release the brake, as desired.

In Fig. 9 is shown a modification of the ratchet arrangement, the same having ratchets at top and bottom instead of at the sides,

the operation being the same as that hitherto referred to in my preferred form.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a brake, the combination with the lever, of a shaft adapted to be rotated by said lever, a sleeve surrounding the shaft, a ratchetwheel keyed to the sleeve and adapted to be locked or unlocked by means of a pawl, a series of gears, a casing inclosing said gears and having interlocking mechanism connected therewith, so that the brake-chain may be wound and automatically locked, a clutch on the shaft, and a foot-pin and lever for throwing said clutch out of operative position.

2. In a brake, the combination with the lever, of a shaft adapted to be rotated by said le ver, a sleeve surrounding the shaft, a ratchetwheel keyed to the sleeve and adapted to be locked or unlocked by means of a pawl, a series of gears, a casing inclosing said gears and having interlocking mechanism connected therewith, so that the brake-chain may be wound and automatically locked, a clutch on the shaft, a foot-pin and lever for throwing said clutch out of operative position, a spring to normally hold the clutch locked, a spool connected With the lower portion of the clutch, and brackets supporting said clutch and spool below the platform of the car.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS O. MILLER.

Witnesses:

W. W. LUNN, J. F. TAYLOR.