US554434A - Car-brake - Google Patents

Car-brake Download PDF

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US554434A
US554434A US554434DA US554434A US 554434 A US554434 A US 554434A US 554434D A US554434D A US 554434DA US 554434 A US554434 A US 554434A
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car
brake
gear
chain
spring
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US case filed in Illinois Northern District Court litigation Critical https://portal.unifiedpatents.com/litigation/Illinois%20Northern%20District%20Court/case/1%3A22-cv-01815 Source: District Court Jurisdiction: Illinois Northern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/02—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with mechanical assistance or drive
    • B60T13/04—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with mechanical assistance or drive by spring or weight
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/2245—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members in which the common actuating member acts on two levers carrying the braking members, e.g. tong-type brakes

Definitions

  • This invention relates to an improvement in car-brakes designed especially for use in connection with street-cars, to be used as a supplementary or elnergencybrake, or as the ordinary brake, when desired.
  • the object of the present invention is to provide a simple and efficient brake mechanism of durable construction, in which the brakeshoes may be quickly and vigorously applied to the wheels by spring-power.
  • the invention consists in a car-brake mechanism embodying certain novel features and details of construction and arrangement of parts, as hereinafter fully described, illustrated in the drawings, and finally pointed out in the claims.
  • Figure l is a vertical longitudinal section through a sufficient portion of a car to illustrate the application of the present improvement.
  • Fig. 2 is a top plan View of the car-truck frame, the car-body and flooring being removed to show the arrangement and operation of the improved brake mechanism.
  • Fig. 3 is a plan viewv of the hand ratchet-lever by means of which the brakes are applied.
  • 1 designates the truck-frame of a car of any ordinary description, and 2 the iiooring thereof.
  • G designates a smaller spur gear or pinion
  • a vertical standard 7 which is secured to and rotates with a vertical standard 7, the latter being mounted at its lower end in a transverselyprojecting bracket 8, arranged about in the same horizontal plane with the bracket 5, so as to bring the pinion 6 into horizontal alignment with the large spur-gear 3.
  • the standard 7 passes upwardly through the flooring of the car, at the front and rear platforms thereof, and is provided at its upper end with a series of teeth 9, disposed around the same, over which is placed the hub of a hand-lever 10, by means of which the standard is turned for winding up the brake mechanism.
  • a centrally-pivoted and doublepointed pawl 11 which is adapted to engage with the teeth of the standard 7 in whichever direction it may be vibrated.
  • the swinging end of the hand-lever 10 is bifurcated or provided with two separate but integrally-formed handles 12, and intermediate said handles is arrangedathumb or iingcr lever 13, which is pivoted to the hand-lever at the fork thereof.
  • This thumb or iinger lever is of the elbow or bell-crank type, being provided with a short arm 1i, from which a rod 15 extends to and connects pivotally with the double-pointed pawl l1 upon one side of the pivot thereof.
  • the double-pointed pawl 11 may be vibrated in such manner as to cause it to engage theteeth of the standard 7 for turning said standard in the desired direction.
  • the standard 7 is further provided with a ratchetwheel 16, keyed thereto and arranged just above the platform of the car, with which a foot-operated pawl 17 is adapted to engage for holding the standard against turning, in a manner well understood.
  • the large spur-gear 3 is provided with a pin 18, projecting preferably from the upper face thereof and located at a distance from the eenter of said wheel equal to abouthalf the throw of the brake-shoes. From this pin a chain 19 extends to and connects with the free end of a strong spring 20, another similar chain 21 extending between said pin 18 and the longitudinally-arran ged brake-rod 22.
  • the spring This hand-lever is IDO 2O may be of any size, shape, or type, according to the desire of the manufacturer, and as may be found most expedient in practice, the essential point being that its free end shall have a movement equal to the throw of the brake beams or shoes.
  • the chain 1) which is interposed between the pin 1S on the spur-gear and the spring 20, is wound around the ver tical shaft 4 of said spur-wheel by rotating the standard 7 and the spur-pinion secured to the lower end thereof and meshing with the large spur 3.
  • the standard 7 is prevented from turning backward by means of the pawl and ratchet described, and the spring 20 is thus held compressed, with the chain 19, extending around the shaft 4, in the manner illustrated in Fig. 2.
  • the chain 21, which connects with the longitudinal brake-rod 22, is slack.
  • the spring 2O under these conditions operates with reduced power upon the large spur-gear 3, but sufficient leverage is provided so that when the pawl 17 is thrown out of engagement with the ratchet on the standard 7 said spring will quickly revolve the gear 3, thereby drawing upon the chain 2l to an extent equal to twice the distance of the pin 1S from the shaft Llplus one-half the diameter of said shaft, or the distance which the chain extends around it. Under the proper adjustment of the chains 19 and 21 the slack in the brake mechanism will all be taken up by the time the pin 18 has traveled one-half its course. From this point on, the leverage on the chain 2l is greatly increased, enabling the spring 2O to firmly and effectually set the brakes. Should it be desired to still more firmly apply the brakes,this
  • the spring 2O may be dispensed with and the brakes applied directly by handpower, in the usual manner.
  • a car-brake mechanism the combination with a gear-wheel mounted beneath the car platform or iiooring, of a chain interposed between said wheel and the brake beam and shoes, a second chain interposed between said gearwheel and an actuating -spring, and means for rotating said gear-wheel for adjusting the brake mechanism, substantially in the manner and for the purpose specified.
  • a gear-wheel mounted to revolve beneath the platform or flooring of the car and provided with acrankpin, in combination with a spring for actuating said gear-wheel also arranged beneath the car body or platform, a chain connecting said spring and crank-pin on the gear-wheel, a second chain connecting said crank-pin with the brake-rod, and means for rotating and holding said gear-wheel at the desired point, substantially as and for the purpose described.
  • a spur gearwheel mounted on a vertical shaft beneath the car platform or flooring and provided with a crank-pin, a spring for actuating said gearwheel arranged beneath the car body, a chain interposed between and connecting said crank-pin and spring and adapted to wind around said shaft, and a second chain interposed between said crank-pin and the brake-- rod and adapted to be wound around the shaft of the spur-gear by the tension of the spring, in combination with a revoluble standard provided with a hand-lever at its upper end, and a pinion or small gear fixed Aupon the lower end of said standard and meshing with said spur gear, all arranged for joint operation substantially as described.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Braking Arrangements (AREA)

Description

UNTTED STATES l PATENT OFFICE..
ROBERT H. BLACK, OF HOMESTEAD, PENNSYLVANIA.
CAR-BRAKE.
SPECIFICATION forming part of Letters `Patent No. 554,434, dated February 11, 1896.
Application filed October 29, 1895. Serial No. 567,307. (No model.)
To all whom t may concern.-
Be it known that l`, ROBERT Il. BLACK, a citizen of the United States, residing at Homestead, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Oar-Brake, of which the following is a specification.
This invention relates to an improvement in car-brakes designed especially for use in connection with street-cars, to be used as a supplementary or elnergencybrake, or as the ordinary brake, when desired.
The object of the present invention is to provide a simple and efficient brake mechanism of durable construction, in which the brakeshoes may be quickly and vigorously applied to the wheels by spring-power.
Other objects and advantages of the invention will appear in the course of the subjoined description.
The invention consists in a car-brake mechanism embodying certain novel features and details of construction and arrangement of parts, as hereinafter fully described, illustrated in the drawings, and finally pointed out in the claims.
In the accompanying drawings, Figure l is a vertical longitudinal section through a sufficient portion of a car to illustrate the application of the present improvement. Fig. 2 is a top plan View of the car-truck frame, the car-body and flooring being removed to show the arrangement and operation of the improved brake mechanism. Fig. 3 is a plan viewv of the hand ratchet-lever by means of which the brakes are applied.
Similar numerals of reference designate corresponding parts in the several figuresA of the drawings.
Referring to the accompanying drawings, 1 designates the truck-frame of a car of any ordinary description, and 2 the iiooring thereof.
3 designates a large spur gear-wheel, which is mounted upon a vertical shaft 4., arranged beneath the car-flooring and interposed between the same and a transverse supporting bar or bracket 5 extending across between the side sills or wheel-pieces of the truck and having its ends bolted or otherwise secured thereto in any convenient manner.
G designates a smaller spur gear or pinion,
which is secured to and rotates with a vertical standard 7, the latter being mounted at its lower end in a transverselyprojecting bracket 8, arranged about in the same horizontal plane with the bracket 5, so as to bring the pinion 6 into horizontal alignment with the large spur-gear 3. The standard 7 passes upwardly through the flooring of the car, at the front and rear platforms thereof, and is provided at its upper end with a series of teeth 9, disposed around the same, over which is placed the hub of a hand-lever 10, by means of which the standard is turned for winding up the brake mechanism. provided with a centrally-pivoted and doublepointed pawl 11, which is adapted to engage with the teeth of the standard 7 in whichever direction it may be vibrated.
The swinging end of the hand-lever 10 is bifurcated or provided with two separate but integrally-formed handles 12, and intermediate said handles is arrangedathumb or iingcr lever 13, which is pivoted to the hand-lever at the fork thereof. This thumb or iinger lever is of the elbow or bell-crank type, being provided with a short arm 1i, from which a rod 15 extends to and connects pivotally with the double-pointed pawl l1 upon one side of the pivot thereof. By means of this arrangement it will be seen that by grasping the finger-lever 13 in conjunction with one 0r the other of the handles 12 ofthe handlever, the double-pointed pawl 11 may be vibrated in such manner as to cause it to engage theteeth of the standard 7 for turning said standard in the desired direction. The standard 7 is further provided with a ratchetwheel 16, keyed thereto and arranged just above the platform of the car, with which a foot-operated pawl 17 is adapted to engage for holding the standard against turning, in a manner well understood.
The large spur-gear 3 is provided with a pin 18, projecting preferably from the upper face thereof and located at a distance from the eenter of said wheel equal to abouthalf the throw of the brake-shoes. From this pin a chain 19 extends to and connects with the free end of a strong spring 20, another similar chain 21 extending between said pin 18 and the longitudinally-arran ged brake-rod 22. The spring This hand-lever is IDO 2O may be of any size, shape, or type, according to the desire of the manufacturer, and as may be found most expedient in practice, the essential point being that its free end shall have a movement equal to the throw of the brake beams or shoes.
In operation the chain 1), which is interposed between the pin 1S on the spur-gear and the spring 20, is wound around the ver tical shaft 4 of said spur-wheel by rotating the standard 7 and the spur-pinion secured to the lower end thereof and meshing with the large spur 3. The standard 7 is prevented from turning backward by means of the pawl and ratchet described, and the spring 20 is thus held compressed, with the chain 19, extending around the shaft 4, in the manner illustrated in Fig. 2. Under this adjustment the chain 21, which connects with the longitudinal brake-rod 22, is slack. The spring 2O under these conditions operates with reduced power upon the large spur-gear 3, but sufficient leverage is provided so that when the pawl 17 is thrown out of engagement with the ratchet on the standard 7 said spring will quickly revolve the gear 3, thereby drawing upon the chain 2l to an extent equal to twice the distance of the pin 1S from the shaft Llplus one-half the diameter of said shaft, or the distance which the chain extends around it. Under the proper adjustment of the chains 19 and 21 the slack in the brake mechanism will all be taken up by the time the pin 18 has traveled one-half its course. From this point on, the leverage on the chain 2l is greatly increased, enabling the spring 2O to firmly and effectually set the brakes. Should it be desired to still more firmly apply the brakes,this
may be done by vibrating the hand-lever in the proper direction, the effect of which will be to advance the pin 1S still farther in the circle in which it travels, thus winding the chain-2l farther around the vertical shaft et.
It will be apparent that two separate pins may be employed on the large spur-gear in lieu of the single pin described, in which case one pin will receive the spring-chain while the other will operate the brake-chain. These pins may be arranged diametrically opposite or in any position found desirable. The brake mechanism hereinabove described is designed to be used in lieu of the ordinary brake mechanism or as a supplementary or emergency brake, for which purpose the device is well adapted by reason of the celerity with which the same operates.
If desired, the spring 2O may be dispensed with and the brakes applied directly by handpower, in the usual manner.
It will be apparent that any preferred form of hand lever or crank maybe used for turning the standard 7 and applying the brakes, and that other changes in the form, proportion, and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.
Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is-
1. In a car-brake mechanism, the combination with a gear-wheel mounted beneath the car platform or iiooring, of a chain interposed between said wheel and the brake beam and shoes, a second chain interposed between said gearwheel and an actuating -spring, and means for rotating said gear-wheel for adjusting the brake mechanism, substantially in the manner and for the purpose specified.
2. In a car-brake mechanism, a gear-wheel mounted to revolve beneath the platform or flooring of the car and provided with acrankpin, in combination with a spring for actuating said gear-wheel also arranged beneath the car body or platform, a chain connecting said spring and crank-pin on the gear-wheel, a second chain connecting said crank-pin with the brake-rod, and means for rotating and holding said gear-wheel at the desired point, substantially as and for the purpose described.
3. In a car-brake mechanism, a spur gearwheel mounted on a vertical shaft beneath the car platform or flooring and provided with a crank-pin, a spring for actuating said gearwheel arranged beneath the car body, a chain interposed between and connecting said crank-pin and spring and adapted to wind around said shaft, and a second chain interposed between said crank-pin and the brake-- rod and adapted to be wound around the shaft of the spur-gear by the tension of the spring, in combination with a revoluble standard provided with a hand-lever at its upper end, and a pinion or small gear fixed Aupon the lower end of said standard and meshing with said spur gear, all arranged for joint operation substantially as described.
In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.
ROBERT Il. BLACK.
Vitnesses WILLIAM TUNs'rALL, FRANK EVANS.
IOO
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