US308430A - David peew - Google Patents
David peew Download PDFInfo
- Publication number
- US308430A US308430A US308430DA US308430A US 308430 A US308430 A US 308430A US 308430D A US308430D A US 308430DA US 308430 A US308430 A US 308430A
- Authority
- US
- United States
- Prior art keywords
- shoe
- brake
- david
- peew
- chill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 241000220010 Rhode Species 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
Images
Classifications
-
- 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
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/06—Bands, shoes or pads; Pivots or supporting members therefor for externally-engaging brakes
- F16D65/062—Bands, shoes or pads; Pivots or supporting members therefor for externally-engaging brakes engaging the tread of a railway wheel
Definitions
- Figure l is a vertical section of the moldingflask, showing a desirable arrangement of the chills for sectionally hardening the shoe.
- Figs. 2, 3, and 4 are perspective views of the brake shoe in which the sectionally-hardened sun faces are represented.
- A represents a two-part molding-flask, from which the brake-shoe pattern has been Withdrawn preparatory to pouring the metal into the gate openings of the flask to form the shoe.
- the longitudinally-arranged chills B for the back surface of the shoe are embedded in the sand a of the nowel, and are desirably made of about one-third of the width of the shoe 0, as shown by the dotted surface, Fig- 3, which serves to indicate the action of the chill upon the back of the same.
- the chills B B are ar ranged in the cope transversely, and operate to chill-harden the face of the shoe sectionally,
- a brake-shoe chill-hardened on its rear side was secured to me by Letters Patent of the United States No. 277,159. I am also aware that it is not new to chill-harden a brake-shoe sectionally from the concave front of the same; but it has been shown that by the combined effect of both front and rear chills the iron of the shoewill be beneficially relieved from the strain which tends to crack the same in cooling.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Description
WITNESSES:
(No Model.)
D. P R EW.
BRAKE SHOE. No. 308,430. Patented Nov. 25, 1884.
FIE-E INVENIY ur-u DAVID rnnw, or PROVIDENCE, RHODE ISLAND.
BRAKE-SHOE.
SPECIFICATION forming part of Letters Patent No. 308,430, dated November 25, 1884.
Application filed August 18, 1884. (No model.)
To all whom it may concern..-
Be it known that 1, DAVID PREw,'a citizen of the United States, residing at Providence,
in the State of Rhode Island, have invented an Improvement in Brake-Shoes, of which the following is a specification.
On railway-cars-the brake-shoes, as ordinarily made of cast-iron, are in a very short time so worn as to require renewal, and the resulting deterioration in the quality of the remaining iron will render the same comparatively valueless for the purpose of renielting and casting new shoes therefrom; and it is the object of my invention to providea practically manufactured brake-shoe having greatly-increased durability accompanied with less deterioration of the material; and it consists in the combination of a sectionally hardened face or wearing-surface with the hardened back of the shoe, as hereinafter set forth.
Figure l is a vertical section of the moldingflask, showing a desirable arrangement of the chills for sectionally hardening the shoe. Figs. 2, 3, and 4 are perspective views of the brake shoe in which the sectionally-hardened sun faces are represented.
In the accompanying drawings, A represents a two-part molding-flask, from which the brake-shoe pattern has been Withdrawn preparatory to pouring the metal into the gate openings of the flask to form the shoe. The longitudinally-arranged chills B for the back surface of the shoe are embedded in the sand a of the nowel, and are desirably made of about one-third of the width of the shoe 0, as shown by the dotted surface, Fig- 3, which serves to indicate the action of the chill upon the back of the same. The chills B B are ar ranged in the cope transversely, and operate to chill-harden the face of the shoe sectionally,
as shown by the dotted surfaces in Fig. 2, and in some cases I arrange a chill lengthwise of the face of the shoe,-so as to produce the result shown by the dotted surface in Fig. 4,
which, in conjunction with the" chilled back 5 surface, will produce a shoe having a hard central portion with comparatively soft edges.
In the manufacture of brake-shoes having a chill-hardened wearingsurface, it is necessary to provide against danger of cracking and breakage caused by the unequal contraction of the metal when cooling off in the flask in contact'with a set chill arranged upon one side only of the shoe, and I have found in practice that by sectionally chilling the metal 5 5 of the shoe upon both sides of the same in proper proportions the improved shoesmay be turned out free from such cracks and flaws and not liable to accidental breakage in use,
the wearing quality of such shoes being more than doubled over that of the ordinary soft-iron shoe.
A brake-shoe chill-hardened on its rear side was secured to me by Letters Patent of the United States No. 277,159. I am also aware that it is not new to chill-harden a brake-shoe sectionally from the concave front of the same; but it has been shown that by the combined effect of both front and rear chills the iron of the shoewill be beneficially relieved from the strain which tends to crack the same in cooling.
I therefore claim as my invention A brake -shoe sect-ionally hardened both upon its front and rear portions, substantially
Publications (1)
Publication Number | Publication Date |
---|---|
US308430A true US308430A (en) | 1884-11-25 |
Family
ID=2377596
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US308430D Expired - Lifetime US308430A (en) | David peew |
Country Status (1)
Country | Link |
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US (1) | US308430A (en) |
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0
- US US308430D patent/US308430A/en not_active Expired - Lifetime
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