IMPROVEMENTS IN GIBS APPLICABLE TO THE CROSS HEADS AND OTHER PARTS OF ENGINES AND OTHER MACHINERY, ALSO IN THE MEANS EMPLOYED FOR LUBRICATING THE SAME AND OTHER SLIDING OR FRICTIONAL SURFACES
Year: 1867

page_text: PROVISIONAL SPECIFICATION left by John Garrett Tongue at the
Office of the Commissioners of Patents, with his Petition, on the
22nd November 1867.-A communication from abroad by William
Armstrong Devon, of Port Richmond, Staten Island, in the County of
Queens and State of New York, United States of America.
L JOHN GARBETT TONGUE, of the Firm of Tongue and Birkbeck, Patent
Agents and Engineers, of 34, Southampton Buildings, Chancery Lane, in the
County of Middlesex, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN GIBS APPLICABLE TO THE CROSS HEADS AND OTHER PARTS
OF ENGINES AND OTHER MACHINERY, ALSO IN THE MEANS EMPLOYED FOR LUBRICATING
THE SAME AND OTHER SLIDING OR FRICTIONAL SURFACES," to be as follows:-
The first part of this Invention relates to a peculiar construction of "gibs"
such as are used in the cross heads of steam and other engines, and in other
mechanical devices having a sliding character or action, and in which the
gibs" form bearings against guides during the sliding or reciprocating action
of the cross head or other mechanical device which carries them, and is
equally applicable to "gibs" having a fixed or stationary character on or
against which the moving parts of machinery bear or slide over. This part of
the Invention consists in making the "gib" in sections consisting of a loose
or detachable friction plate of superior metal as regards wear and antifriction
properties, the same covering the one side or face of the gib to form the
rubbing surface or bearing and main portion or body of the "gib" of inferior
metal constructed or arranged to carry the friction plate, and constituting a

page_text: back or support to the latter in independent or detachable lock connection
with it. By this compound character of the "gib" increased durability is
given to it as compared with a "gib" made solid or in one piece of inferior
metal, and much greater economy is induced than where the same is made
solid of a superior metal, as in case of extreme wear the friction plate may
be readily removed and a new one supplied to the main portion or body of the
"gib" which is exempt from wear.
The second part of the Invention relates to the lubrication of "gibs" of a
working or moveable character or the surfaces against which they bear or
slide; and this part of the Invention, which is applicable to other mechanical
devices having a sliding or reciprocating action or which form the bearing
surfaces thereto, consists in a combination with the "gib" or sliding device or
guide thereto of a lubricating roller set in a suitable recess, and pressed out-
wards by a spring or weight in such manner as that its periphery on the one
side projects into or against the bearing surface it is designed to lubricate,
while at another or other portions of its periphery it as rotated by frictional
contact with the bearing, draws oil, or lubricating matter by being brought in
rubbing contact with a wick connected with an oil box or reservoir.
Likewise the Invention consists in constructing the head or one end of the
"gib" hollow, and combining therewith suitable lubricating devices with an
opening through the face of the "gib* for passage of the oil or lubricating
matter to the bearing also in a combination of the detachable friction plate,
before referred to, with the same.