US1285281A - Car-brake-operating mechanism. - Google Patents

Description

T. H. McCAULEY.

CAR BRAKE OPERATING MECHANISM.

APPLICATION mu) NOV. 16. 1917.

1,285,281 Patented Nov. 19, 1918,

T. H. MCCAULEY.

CAR BRAKE OPERATING MECHAMSM.

APPLICATION FILED NOV. 16. 1912.

Patented Nov. 19, 1918.

2 SHEETS-SHEET 2.

ventor Attorneys UNITED STATES PATENT 'FFTCE.

THOMAS HENRY MCGAULEY, OF CALGARY, ALBERTA, CANADA.

CAR-BRAKE-OPERATING MECHANISM.

Application filed November 16, 1917.

To all whom it may concern:

Be it known that I, THOMAS'HENRY Mc- GAULEY, a citizen of the Dominion of Can ada, residing at Calgary, in the Province of Alberta and Dominion of Canada, have in vented a new and useful Car-Brake-Operat ing Mechanism, of which the following is a specification.

The device forming the subject matter of this application is a brake operating mechanism for street cars and like vehicles, and the invention aims to provide novel means whereby, when the brakes are released, energy may be stored up in a spring, to facilitate a quick setting of the brakes.

It is within the province of the disclosure. to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view, which will appear as the description proceeds the invention resides in the combination and arrangement .ofparts andin the details of construction hereinafter described and claimed it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

Figure 1 shows in front elevation, a brake setting mechanism embodying the improvements hereinafter described;

Fig. 2 is a side elevation of the structure shown in Fig. 1;

Fig. 3 is a rear elevation of the structure shown in Fig.1;

Fig. 1 is a rear elevation showing a modified form of the invention, parts appearing in section; and

Fig; 5 is a side elevation of the device shown in Fig. 4.

Referring to Figs. 1, 2 and 3 .the numeral 1 denotes the floor of, a car. Fixed to and rising from the floor 1 is a post 2, a back plate 3 being attached to the post. A standard i is spaced from the post 2 and is connected to the back plate 3 by means of cross bolts 5 and 6. The parts above alluded to constitute a supporting structure for various movable elements to be described hereinafter.

A horizontal main shaft 7 isjournaled for rotation in the post 2, the back plate 3 and the standard 4, the shaft 7 carrying at one end a hand wheelS. A drum 9 is mounted Specification of Letters Patent.

Patented Nov. 19, 1918.

Serial No. 202,333.

to move with the hand wheel 8 with the shaft7. An endless chain or belt 10 is trained around the drum and around a sheave 1 1 -journaled at 12 on a foot plate 14: attached by securing elements 15 to the post 2, so that the vertical position of the sheave 11 may be changed, the chain belt 10 being loosened or tightened as a consequence.

At 16 there appears an upright guide in the form of a rod, the lower end 17 of the guide being attached to the floor 1. The upper end of the guide 16 .is fashioned into a U-shaped handle 18 attached as shown at 19 in Fig. 3 to the post 2. A traveler 34 is mounted to reciprocate vertically on the guide 16 and is provided with a laterally extended pedal 35 to which a dog 36 is pivoted as shown at 37 the dog being forked or otherwise constructed at its free end to cooperate adjustably and releasably with one run of, the chain belt 10.

The numeral 20 denotes a casing through which the main shaft 7 passes, the casing having lateral ears 21 mounted on the bolts 6 and held thereto by set screws 22 or otherwise. Disposed within the casing 20 is a coiled spring 23, one end of which is secured to the main shaft 7, the other end of which is secured as shown at 24 to the casing 20.

A pinion 25 is secured to the main shaft 7 between the casing 20 and the back plate 3 and meshes into a combined gear and ratchet wheel 26' carrying a drum 27, the wheel and the drum being journaled on a shaft 28 mounted in the post 2 and the standard 4. The numeral 29 indicates a spacer on the shaft 28. and interposed between the drum 27 and the standard 4 so as to hold the gear wheel26 in ,mesh with the pinion 25, the spacer being in the form of a hub on the drum 27, if desired. One end of a flexible element 30 is attached as shown at 31 to the drum27, the flexible element extending downwardly through the floor 1 and around a direction changing idler 32 journaled on a frame 33 carried by the floor. Thev flexible element 30 is operatively connected, in any desired manner, with the brakes (not shown).

A pawl 38 is pivoted at 39. to the back plate 3 and is adapted to cooperate with the combined gear and ratchet wheel 26, the pawl being located below said wheel, and being somounted that it tends to gravitate out of engagement, with the wheel. An angu- {Ali lar rod l is pivoted to the pawl 38 and is mounted to slide in one or more. guides on the post 2. The lower end of the rod ell) is pivoted to a lever 42 fulcruined at, d3 on the post 2. A strip 4st is attached one edge of the post '2 and is provided with an upstanding end d5, constituting a guide for directing the foot of an operator upon. the pedal of lever A rod 4:6 is pivoted to the pawl 38 and carries, at its lower end, coacting adjusting nuts ii. A releasing rod 48 is mounted to slide vertically in guides 49 on the post 2 and is provided at its up per end with a handle 50. An abutment l is secured to the rod 48, a compression spring surrounding a port-ion of the rod 48, one end of the spring engaging the abutment 51, and the other end of the spring engaging one of the guides 49. The lower end of the rod 5:8 is supplied with alaterally extended eye 53 through which the rod 4:6 passes slidably, the nuts l? on the rod to being disposed below the eye A pawl 5% is pivoted at on to the back plate 3 and coiiperates with the combined gear and ratchet wheel 26, the pawl being located below the said wheel, and being so mounted that it tends to gravitate out of engagement with the wheel. fin angular rod 56 is pivoted to the pawl 5a and entends downwardly to a pedal or lever 57, to which the rod is pivoted, the pedal being fulcrumed as shown at 58 on the post In practical operation, the person operatingthe mechanism hereinbefore described steadies himself by grasping the handle 18. The pedal 35 is pushed downwardly by foot pressure, the traveler 34tmoving downwardly on the guide 16. When the pedal 35 is thrust downwardly, the dog 36, coactina' with the chain belt 10, causes the chain belt to ride over the sheave 11 and rotate the main shaft 7 and the hand wheel 8, by means of the drum 9. il hen the main shaft '7 rotated as above described, the pinion is rotated, the same imparting rotation to the gear wheel 26 and the drum 2?, the flexible element 30 being operated, and the brakes being released. l lhen the shaft 7 is rotated, as aforesaid, the spring 23 is wound up and put under tension, energy thus beingstored, to be used in setting the brakes quickly. in order to hold the tension thus secured in the spring 23, the pedal Or lever is depressed, raising the rod to and causing the pawl 38 to coact with the combined gear and ratchet wheel l l hen the pawl 38 is raised as above described, the rod ll) slides through the eye 53 on the rod until the nuts 7 are disposed closely below the eye. 7

lVhen it is desired to set the brakes, the pawl 88 is released from the gear and ratchet wheel 96. This operation may be brought about by giving the hand wheel 8 a slight turn or jar; but ordinarily, the rod i8 is slid downwardly by means of the handle 50, the eye 58 on the rod coacting with the nuts l? on the rod 46, and the latter element serving to draw the pawl 38 out of en 'agement with the combined gear and ratchet wheel 26. lVhen the wheel 26 is free, as above described, the spring 22-5 reacts on; the shaft T and rotates the drum 2'? by means of the pinion and the gear wheel 26, the chain or flexible element being actuated to set the brakes, the operation above described taking place with great. rapidity. if desired, the hand wheel 8 may be given a turn or two to set up the brakes tightly, in case the desired friction has not been produced by the action of the coiled spring If it is desired to hold the brake pressure, then the pedal 57 is tilted, the rod 56 raising the pawl and moving the same into engagement with the wheel 26. The pawl 5% may be disengaged from the wheel 26 by giving the hand wheel 8 a slight turn. In the modified form shown in Figs. i and 5, the numeral 59 marks a tl-shaped post corresponding to the post 2. A vertical main shaft 60, represented in Fig. 3 by the part 7, is journaled in the post 59. A spring casing is shown at 61, the function of the part 20 being recalled. A frame 62 is mounted on the post 59. Journaled in the frame 62 is a horizontal shaft 63 carrying a hand wheel 65 and a drum 64;. A chain belt is trained around the drum 6%- and corresponds with the chain belt 10. The shafts 63 and 60 are operatively connected by inltermeshing beveled pinions 66, a ratchet wheel 67 being secured to the shaft The ratchet wheel 67 cooperates with a dog 68 corresponding to the part 38, the dog being operated by means of a rod 69 corresponding to the rod d6, but extended downwardly for engagement with a pedal (not shown). The numeral '70 denotes a rod like the rod 4:8 hereinbefore described and having an eye 71 through which the rod 69 passes, there being an abutment 72 on the rod 69 and adapted to coact with the eye 71. At T8 there appears a dog which is fulcrumed on th frame 62, the dog 73 having the functions of the dog 5% hereinbefore descrioed. The dog 73 is controlled by a rod 7 represented in Fig. 3 by the rod 56. The guide 76 has the functions of the guide 16 of Fig. 1.

The operation of the structure last above described does not dilfer materially from the operation of the structure first set forth in this specification, minor changes having been made int order that the shaft 60 may be disposed vertically, it being observed that the shaft- '4' is horizontally disposed in Fig. 1.

will be understood that the traveler B l may be raised and lowered, it being possible to engage the dog 36 with one run of the chain belt 10, at any desired height. In this way, the vertical throw of the pedal 35 may be regulated.

Having thus described the invention, what is claimed is 1. In a device of the class described, a support; a main shaft j ournaled therein!; an idler on the support; a belt trained around the shaft and the idler; a guide; a traveler mounted to reciprocate on the guide;an adjustable connection between the traveler and one run of the belt; a spring; means for securing one end of the spring; means for operatively connecting the other end of the spring with the shaft whereby the spring will be tensioned when the traveler is operated; means for holding the shaft releasably against rotation under the action of the spring; and a brake setting mechanism controlled by the shaft. 7

2. In a device of the class described, a support; a main shaft journaled therein; an idler on the support; a belt trained around the main shaft and around the idler; a guide; a traveler mounted to reciprocate on the guide; an adjustable connection between the traveler and one run of the belt; a spring; means for securing one end of the spring; means for connecting the other end of the spring with the main shaft whereby the spring will be tensioned when the traveler is operated; a gear wheel journaled on the support; brake setting mechanism operatively connected with the gear wheel; a pinion on the main shaft and meshing into the gear wheel; and individually operable pawls carried by the support and coacting with the gear wheel to limit the rotation thereof in opposite directions.

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

THOMAS HENRY McCAULEY.

Witnesses:

J. W. WATSON, F. M. GREEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G.

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