US 456592 A
Description (OCR text may contain errors)
E. PEGKHAM. GAR SPRING. Patented July 28, 1891 Inventor 1 x g W m Nw \wfi A E 55 a: 5:." V
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EDGAR PECKHAM, OF NElV YORK, Ni Y.
SPECIFICATION formingpart of Letters Patent No. 456,592, dated July 28, 1891.
Application filed August 18, 1890.
To all whom it may concern;
Be it known that I, EDGAR PECKHAM, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvementsin Car-Springs, of which the following is a specification.
My invention relates to springs fonsupporting car-bodies on the truck-frames; and it has for its object the devising of a composite spring which shall be adapted to render the car easy riding under all conditions and to effectively take up the shock due to obstructions on the way.
In the construction of my spring structure the elastic support forthe normal load of the car is supplemented in such manner that eX- tra loading of the car, instead of causing the car-body to sink against an inelastic surface, will enable it to ride easy and without shock or strain to the parts.
My invention is fully described hereinafter, and in claims at the end of the description I have set out the novel features, for which Letters Patent is desired.
In the accompanying drawings, which form part of this specification, and in which like parts are indicated by like letters of reference, Figure l is a sectional elevation of my composite spring. Fig. 2 is a sectional view of the cap for the main coiled spring, said cap also serving as a pocket for the rubber cushion of the spring structure; and Fig. 3 is a side view of the bottom spring-pocket, this View being at right angles to that view of the pocket shown in Fig. 1.
Referring to the drawings, A indicates a coiled spring of suffioient rigidity to serve as a partof the means which sustain in an elastic manner the normal load of the car. This spring is seated in a metallic pocket-piece B, which may be of the form shown or of any other suitable form, and at its top it fits within the metallic cap-piece O, which is provided with flanges 0, serving at their bottoms to hold spring A in proper position and at their tops to form a pocket or seat for the bottom of rubber cushion D. The cappiece C is open centrally in a vertical line to permit the passage therethrough of the bolt E, which serves in conjunction with nuts or pins to hold the several elements of the composit spring to- Serial No. 362,301. (No model.)
gether. The cap C is provided with the depending part (Z, which,iu addition to the function presently ascribed to it, serves to maintain the spring A in operative position. The rubber cushion D is preferably of the form shown, being of less diameter centrally than at its ends, thus permitting it to give more spring A, I place a smaller spring I of the required rigidity, which supplements the spring A and takes up any extra load placed on the car that may be suflicient to compress the main spring A to its limit of resistance. On the top of supplemental spring I, I place a flanged metallic washer i, which serves to guide the spring I and keep it in proper relation to the bolt E,which passes through said spring. On the top of metallic washer i, I place a rubber washer h, also surrounding the bolt 'E, which acts as a cushion to receive the depending end cl of the cap 0 as the latter moves downward with the contraction of main spring A under the load of the car. Shock to the parts from this movement is thus prevented.
In the operation of my composite spring the rubber cushion D serves to take up the shock due to the travel of the car over the way, while the main spring A receives and supports the normal load to which the car is capacitated. \Vhen the load exceeds normal, the main spring A will be compressed, so that the de pending part d of the cap-piece C will abut against the rubber washer 71, and compress to more or less extent. the supplemental spring I, which thus relieves the main springA when its limit of elasticity is reached, and thereby maintains the elastic connection between the car-body and its supporting-truck.
This invention is particularly intended for use on trucks for electromot-or-cars, but is obviously adapted for other cars and in other connections.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is
l. The combination, with the coiled spring ICC) and supporting-pocket B, of double-flanged cap-piece C, rubber cushion D, double-flanged pocket-piece G, and connecting-bolt, substantially as set forth. 7
2. The combination, with the main coiled spring, its supporting-pocket B and flanged,
cap and guide C, provided with depending portion d, of supplemental spring 1, arranged within the main spring and supported in said pocket B, guide-Washer @an d connectin g-bolt,
substantially as set forth.
3. The combination, with the main coiled springsupportedin pocket B, of supplemental V York and State of New York, this 31st day'of,
July, A. D. 1890.
J. E. M. BOWEN, W. A; TREADWELL.