US57190A - Improvement in trunk-engines - Google Patents

Improvement in trunk-engines Download PDF

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Publication number
US57190A
US57190A US57190DA US57190A US 57190 A US57190 A US 57190A US 57190D A US57190D A US 57190DA US 57190 A US57190 A US 57190A
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Prior art keywords
trunk
rings
guides
engines
cylinder
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1433—End caps

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  • the object of this invention is to obviate this difculty; and to this end the invention consists in dispensing with stung-boxes for the packing of the trunks by the use of eX- pandingpacking-rings substantially like those used for piston-packing inserted into grooves in the trunk and working in cylindrical guides attached to the cylinder-heads.
  • A is the cylinder of the engine.
  • B is the piston surrounding and attached to the trunk which extends through both cylinder-heads and works in two cylindrical guides, F F, attached to the cylinder-heads D D. These guides are concentric with the cylinder, and each of a length somewhat 0 ⁇ reater than the stroke of the piston, and areqbored out truly and smoothly.
  • E E are the expanding packing-rings, of metal, which constitute the principal feature of my invention, fitted into circumferential grooves c c, which are formed in the exterior of the trunk in such positions that during the stroke of the engine they will work within the guides F F, one within one and the other within the other ot' the said guides.
  • These packing-rings may be of any known or suitable construction, and be pressed out to work steam-tight within the guides either by means of springs or by the pressure of the steam,
  • a similar packing-rin g and cylindrical guide may be used in trunk-engines in which the trunk passes through one cylinder-head only.
  • Another advantage of this arrangement of metallic packing rings consists in the simplicity of construction provided for compared with the insertion of such rings into guides of a similar character to stuffing-boxes, such rings in the latter case requiring glands and bolts in the ends ofthe guides.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing Devices (AREA)
  • Gasket Seals (AREA)

Description

UNITED STATES PATENT OEEICE.
JOHN B. R()OT, OF NEW YORK, N. Y.
IMPROVEMENT IN TRUNK-ENGINES.
Speciiication forming part-of Letters Patent N0. 57,190, dated August 14, 1866.
To all 'whom it may concern Beit known that I, JOHN B. ROOT, of the city, county, and State of New York, have invented a new and useful Improvement in Trunk-Engines; and I do hereby declare that the following is a full7 clear, and exact de scription of the same, reference being had to the accompanying drawing, forming part of this specification, said drawing representing a central longitudinal vertical section of a trunk-en gine with the improvement applied.
One ofthe difficulties encountered in trunkengines of large size has been that of preserving a tight packing in the very large stuffingboxes employed around the trunk.
The object of this invention is to obviate this difculty; and to this end the invention consists in dispensing with stung-boxes for the packing of the trunks by the use of eX- pandingpacking-rings substantially like those used for piston-packing inserted into grooves in the trunk and working in cylindrical guides attached to the cylinder-heads.
To enable others skilled in the art to apply my invention to use. I will proceed to describe it with reference to the drawing. A
A is the cylinder of the engine. B is the piston surrounding and attached to the trunk which extends through both cylinder-heads and works in two cylindrical guides, F F, attached to the cylinder-heads D D. These guides are concentric with the cylinder, and each of a length somewhat 0^reater than the stroke of the piston, and areqbored out truly and smoothly.
E E are the expanding packing-rings, of metal, which constitute the principal feature of my invention, fitted into circumferential grooves c c, which are formed in the exterior of the trunk in such positions that during the stroke of the engine they will work within the guides F F, one within one and the other within the other ot' the said guides. These packing-rings may be of any known or suitable construction, and be pressed out to work steam-tight within the guides either by means of springs or by the pressure of the steam,
which passes from the cylinder between the trunk and guides and enters the grooves a a.; but I prefer to use rings ot' the construction which is the subject-matter of my application for Letters Patent Iallowed February 8, 1866. These rings, fitting and working steam-tight within the cylindrical bores ot' the guides F F, effectually prevent any steam from escaping from the cylinder between the trunk and the guides beyond the said rings.
A similar packing-rin g and cylindrical guide may be used in trunk-engines in which the trunk passes through one cylinder-head only.
One advantage of arranging the packingrings in grooves around the exterior of the trunk over their arrangement in stufling-boxes attached to the cylinders consists in their permitting the use oi' longer cylindrical guides F F with a given length of trunk, and thereby enabling the engine with a given length of stroke and guide to be made considerably shorter. In explanation of this, let it be supposed that the rings were arranged near the outer ends ot the cylindrical guides. The trunk would then have to be long enough to remain within the rings when the. piston was at the end of the stroke farthest from either ring.
Another advantage of this arrangement of metallic packing rings consists in the simplicity of construction provided for compared with the insertion of such rings into guides of a similar character to stuffing-boxes, such rings in the latter case requiring glands and bolts in the ends ofthe guides.
I do not confine myself to the particular construction of the packing-rings herein specified; but
What I claim as my invention, and desire to secure by Letters Patent, is-
rIhe arrangement of the packing-rings within the trunk, in combination with the cylindrical guides F F, attached to the cylinder, substantially as and for the purpose herein specified.
JOHN B. ROOT.
Witnesses:
J. W. Cocinas, A. LE CLERC.
US57190D Improvement in trunk-engines Expired - Lifetime US57190A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5934889A (en) * 1995-08-25 1999-08-10 Brother Kogyo Kabushiki Kaisha Pump driven by cam having the cylinder supported by the cam shaft

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5934889A (en) * 1995-08-25 1999-08-10 Brother Kogyo Kabushiki Kaisha Pump driven by cam having the cylinder supported by the cam shaft

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