US1473935A - Derrick base - Google Patents

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J. T. HORTQN DERRICK BASE m, .y w 0 mm W m M ,mm y 5 HHHL w, w m /V\\ 4, ./Z

Filed Aug l. 1922 JOHN T. HOB/TON, OF BROOKLYN, NEW'YORK.

DERRCK BASE.

.application filed August l, 1922.

To al] ifi/750m il' may concern Be it known that I, Joint 'll Hon'roiv, a citizen oit the United Statesifand a resident ot New lbrk. borough ot Brooklyn, in the count)v of Hines and State of New York, have invented certain new and useful lmprovements in Derrick Bages, ott which the Afollowing; is a specication.

This invention relates to derrick bases and particularly to devices of that class which are adapted for use in connection with the common type of derrick comprising a verticallv rotatable mast provided with a hinged boom. The object of my improvements is to provide a derrick base having' a non-friction bearing' for the rotation ot the mast and also affording vieldabilitv inY the relation betweensaid bearing and the toot or socket supporting the mast. so that limited variation of the mast from its normal vertical position when in operation will not militate against the action of said bearing. Other Afeatures of novelt7 will appear later hereiny My improvements are illustrated in their preferred embodiment in the drawing accompanying this specification wherein the .fie-ure is a side elevation, showing my improved base in section, secured to a support. and so much of the foot of a derriclr as will serve to illustrate inv improvements.

Referringnow to the drawing. support 2 has resting' thereon and secured thereto base plate 3 provided with central vertical openine" l therethrough. Resting on the upper surface ot base plate 3 is base plate cap 5 having a central vertical opening therethrough in alinement with said opening 4 of plate 3. Cap 5 is provided with downwardly projecting annular rib 6 in engagement with a corresponding vfrroove in plate 3 Jfor maintaining said cap and plate in concentric relation, while permittingy Jfree vertical separation of said members when desired. Above said base plate cap and in concentric relation vtherewith is upper plate 7 having aA central vertical opening"r therethrough and provided with an inner downreaching flange 8 therearound projecting into 'a correspondingrecess in cap 5. Said upper plate also has an outer downreaching flange 9 projecting" over the outer edge of said cap 5 and provided with screw bolts l() in threaded engagement therewith` projecting therethrough and Jfreely engaging annular groove 1l in the outer edge ot' said cap for retaining' said cap and said upper plate Serial No. 573,991.

in coactinp relation and for enabling the members ot thenon-riction bearing` to be handled as a unit. ln the upper lace ol' base plate cap 5 and concentric therewith is annular ball race l2, and in the lower 'face ot upper plate 7 is corresponding ball race 13x said two ball races having` a row oi halls ll. seated therein and therebetween. Said tiene-es 8 and 9 eilicient to keep dust and dirt out O' said non-friction bearing.

The upper portion ot said plate i is provided vvith a spherical bearing l5 concentric with the opening` therethrough. llbove said plate is 'toot piece t6 havingr a seat therein Vtor niast 'I7 and a'pivotal support tor boom 1S. Downreaching1 trom 'toot 1 6 is hollow stem 19 provided about its upper portion with spherical bcarino 20 adapted 'for en- ,.Iagenient with spherical bearingl5 ot cap 7. The lower portion of stem 19 projects downwardlj.'v into opening i og base plate fl and is provided thereabout with annular groove 2l. saidk base plate beingr provided with pin Q2 projecting` into said opening 4 and into engagement with said annular groove `for retaining bearing 20 ot member 16 in its seat and the several members of the device in assembled condition. The diameter 0l Stem 19 is smaller than that of openingll: and ,groove 21 tits looselv about pin 2Q. wherebv a limited amount ot movement ot said stem on its spherical bearing is pere mitted.

ot the non-friction bearingr with the care otherwise required. Said device also adapts itself to such angular variations incident to the derrick when in use.

l. claim:

1. A derriclr base including in combination a base plate having a central vertical openingtherethroughL and horizontallyY arranged ball race about an d concentric with said opening, an upper plate having a ball race therein and a vertical central openingI 'liti llOO therethrough, a row of balls between and seated in said ball races, a spherical bearing in the upper portion of said upper ball race plate concentric with the opening therethrough, a toot piece having a seat therein for a mast, a stem downwardly reaching from said foot piece, and a spherical bearing about said stem adapted ttor engagement with t-he spherical bearing of said upper ball race plate, said stem projecting downwardly into the opening in said base plate and being of smaller diametei` than said base plate opening whereby limited movement ot said stem on its spherical bearingl is permitted.

2. A derrick base including in combination a base plate having a central vertical opening therethrough, a base plate cap having a central vertical opening therethrough and a ball race in its upper tace, coacting means on saidV base plate and cap tor maintaining said members in (-,oncentriiI relation while permitting free vertical separation of said members, an upper plate having a ball race therein and a vertical central opening therethrough, an inner flange and an outer flange on said upper plate downreaching over the inner and outer edges respectively of said base plate can, a row off balls between and seated in said ball races, means carried by said upper plate and incngagement with means on said base plate cap Yfor retaining said upper plate and cap in coacting relation with each other and with said balls, a spherical bearing in the upper portion ot' said upper ball race plate concentric with the opening therethrough, a Ytoot piece having a seat therein for a mast, a stem downwardly reaching from said Jroot piece, and a spherical bearing about. said,stem adapted for engagement with the spherical bearing of said upper ball race plate, said stem projecting downwardly into the opening in said base plate and being oisinaller diameter than said base plate opening whereby limited movement ot said stem on its spherical bearing is permitted.

A dei-rick base including in combination a base plate having a central vert-ical opening therethrough and a horizontally arranged ball race about and concentric with said opening, an upper plate having a ball race therein and a vertical central opening therethrough, a row of balls Abetween and seated in said ball races,'a spherical bearing in the upper portion ol said upper ball race plate concentric with the opening therethrough, a foot piece having a seat therein for a mast, a stem downwardly reaching from said foot piece, a spherical bearing about said stem adapted for engagement with the spherical bearing of said upper ball race plate, said stem projecting downwardly into the opening in said base plate, anY

annular groove about said stem within said 'base plate, and means projecting from said while permitting tree vertical separation of said members, an upper plate having a ball race therein `and a vertical central opening therethrough and an inner flange and an outer flange downreaehing over the inner and outer edges respectively ot said base plate cap, a row ot balls between and seated in said ball races, means carried by said upper plate and inwengagement with means on said base plate cap t'or retaining said upper plate and cap in coacting relation with each other and with said balls, aV spherical bearing in the upper portion ot said upper ball race plate concentric with the opening there through, a foot piece having a seat therein for a mast, a hollow stem downwardly reaching trom said toot piece, a spherical bearing about said stem adapted it'or engagement with the spherical bearing of said upper ball race plate, said stem projecting downwardly into the opening in said base plate, an annular groove about said stem within said base plate, and means projecting from said base plate into said annular groove for retaining said stein in said base plate, said stem being ot' smaller diameter than said base plate opening whereby limited movement ot said stem on its spherical bearing` is permitted.

5. A derrick base including in combination a base plate, a horizontally rotatable upper plate above said base plate, a non-` triction bearing betwen said base plate and said upper plate, a toot piece having a seat ltherein for a vertically disposed mast, and

a spherical self adjusting seat between said foot piece and said upper plate whereby the 'device is adapted to universal variable -an- JOHN T. HORTON.

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