US350525A - Brake-handle for street-cars - Google Patents

Description

(No Model.)

F. B. BROWNELL.

BRAKE HANDLE POR STREET GARS. v

Patented Oct. 12,1886.I

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' Aww@ UNITED STATES PATENT OFFICE.)

FREDERICK B. BROWNELL, OF ST. LOUIS, MISSOURI.

BRAKE-HANDLE FoR`sTREET-CARS.

SPECIFICATION forming part of Letters Patent No. 350,525, dated October 12, 1886.

Application med May 15, ieee. serial No. 202,291. (No model.)

.To all whom it may concern: v

Be it known that I, FREDERICK B. BROWN- ELL, of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Brake-Levers or Handles for Brakes of Street-Gars, Ste., of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, and in which- Figure lis a side view of a handle attached to the brake-rod by means of my improved attachment, the upper end or knob ofthe handle being shown in section. Fig. 2 is an enlarged view, part in section and part in elevation, illustrating the attachment. Fig. 3 is an enlarged view in vertical section.

My invention relates to an improvement in the means for securing handles to the brakerod of street-cars and like vehicles, and relates to that class of attachments wherein there is a ratchet connection between the handle and the brake-shaft, permitting of a backward movement of the handle independently of the brake-shaft, the object being. to provide a means whereby the driver can keep the handle of the brake directly in front oi' him, and operate the brake by a forward thrust of the handle without a complete revolution or rotation of it, so that he may always have the handle in a position where he can operate it to the best advantage.

My'invention consists in an improved means for connecting these handles to the brakeshafts, whereby the backward movement of the handle is permitted independently of the brake-shaft at any time. rIhe attachment has .none of the' disadvantages existing heretofore in such attachments-such as the handlewhen the brake is released and the shaft revolves backward rapidly, owing to its momentum, turning back farther than the brakeshaft, resulting in displacing the handle with relation to the brake-shaft, so that the next time the brake is applied the handle is not in the proper position in front of the driver; and another advantage of my attachment is that the spring of the ratchet is of such a length and such a nature that it is not liable to break or lose its tension.

'Ihe novel features of my invention-are here5 inafter fully described, and pointed outin the claims.

Referring to the drawings, A represents the handle of a street-car brake or other brake provided with knob or hand-piece Bat its upper end, which I'prefer to make hollow, as shown in Fig. l, so as to reduce the backward momentum of the handle, when the brake is released, by reducing the weight of the handle.

C represents thebrake-shaft, which is connected to the brake in any ordinary way. On

the upper end of this shaft is secureda sleeve, y

D, which is held from turning on the shaft by any suitable means. with an annular shoulder, D', and socketD, having chamber D". I have shown the up-- per end of the shaft screw-threaded, and the lower end of the sleeve D is correspondingly threaded to screw over the end of the shaft. (See Fig. 3.) The upper end, D, of the sleeve D is closed, except that it has an opening suficiently large to allow the passage of a bolt, E, which connects the handleA to the sleeve.

Surrounding the bolt within the chamber D of the socket D of the sleeve D and be tween the head E of the bolt and the upper end of the socket of the sleeve D is a spring, F, the ofce of which is to hold the handle A down upon the shoulder D of the sleeve D,

as will be readily understood, but which permits of the upward movement of the handle, allowing the ratchet-teeth to slip past each other.

On the sleeve D are ratchet-teeth I, which are preferably inclined, as shown in Fig. 2, and in dotted lines, Figs. l and 3. These teeth project upwardly, and into them fit similarly-shaped teeth J, projecting downwardly and formed upon the handle within its socket L, which ts over the teeth I down upon the shoulder D of the sleeve D. These ratchetteeth are so presented that they will interlock and remain in engagement when the handle of the brake is at `rest or when it is forced forward to apply the brake. The spring F also acts to hold the teeth into engagement and to force them into engagement when out. The bolt E is supported on the shoulder A of the handle by means" of a nut, E.

When the brake-shaft C is held from back- This sleeve is formedv IOO ward movement, and the handle is moved backward, the teeth I J slip past each other, the inclines of the teeth J sliding npwardnpon the inclines of the teeth I. 'Ihe spring F at this time compresses to permit of this backward movement of the handle, and as soon as the backward movement of the handle, independently of the brake-shaft, ceases, the spring draws the teeth into engagement. The teeth being inclined, as I have shown and stated, they are self-interlocking, so that there is no danger of them slipping past each other when the brake is applied, and the engagement does not depend upon the action of a spring to hold them into engagement. Another advantage arising from theirinterlocking, which is partly due also to the long spring F, which may be of any desired tension, is that when the brake is released and the handle and shaft revolve backward rapidly together, the handle does not, owing to its momentum, rev'olve farther than the shaft, when the teeth of the ratchet would slip over each other. This would result in the improper adj ustment of thehandle upon the shaft, which would have to be adjusted before the driver would have the handle in the proper position in front of him when the brake is again applied.w While the accidental backward movement of the handle is thus avoided, the means does not prevent the handle from being pulled back when it is desired. The form of connection I have shown also permits of the use of the long spring F, which is not liable to be strained or broken, as is the case with a short spring acting on a pawl to keep it into engagement with the ratchetteeth.

I prefer to extend the handle below the ratchet-teeth, as shown at L, the same fitting upon a reduced portion of the sleeve D and resting on the shoulder D', as shown in Figs. 2 and 3, and which acts to strengthen the connection between the handle and sleeve.

My improved attachment is cheap and durable, and effectual in performing the function for' which it is designed. f

I claim as my invention- 1. The combina-tion, with the handle A, provided with ratchet-teeth, and the brake-shaft C, of the sleeve D, secured to the shaft C, and having the socket D ratchet-teeth to engage the ratchet-teeth on the handle, aspring, F, and connection between the handle and sleeve, substantially as shown and described, for the purpose set forth.

2. In combination with the handle provided with ratchet-teeth and the brake-shaft G, the sleeve provided with a socket, D, and ratchetteeth to engage the teeth on the handle, connecting-bolt, and spring, arranged and operating substantially as and for the purpose set forth.

3. In combination with the handle provided with rearwardly-inclined ratchetteeth and the brake-shaft, the sleeve provided with forwardly-inclined ratchet-teeth to engage and interlock with the teeth on the handle, bolt connecting the handle to the sleeve, and spring surrounding the bolt, substantially as and for the purpose set forth.

4. 'In combination with the handle having rearwardly-inclined ratchet-teeth, the sleeve having forwardly-inclined ratchet-teeth to engage and interlock with the teeth on the handle, substantially as set forth.

5. In combination with the rearwardlydn clined ratchet-teeth secured to the brake-shaft, the forwardly-inclined ratchet-teeth secured to the operating-lever, substantially as described.

6. In combination with the handle provided with ratchet-teeth, the sleeve provided with a socket, D, ratchetteeth to engage the teeth on the handle, and spring-connection between the handle and sleeve, substantially as and for the purpose set forth.

7. A brakehandle consisting of a sleeve, D, formed with an annular shoulder, D', teeth I, and socket D", having springchamber D, the handle proper, A, formed with socket L, and teeth J within the socket L, the bolt E, having the head E, and nut E", and a spring,

F, substantially as described.

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