US451862A

US451862A - Crieff

Info

Publication number: US451862A
Authority: US
Publication date: 1891-05-05
Anticipated expiration: 1908-05-05

Description

(No Model.)

R. P. 8v J. M. MONCRIEFF. TBA PUT, COFFEE POT, 6m.

No. 451,862. Patented May 5, 1891.

ma News versus co1. Hum-Lindo., msnm-cran, n. c,

NTTED STATES PATENT OFFICE.

ROBERT PETER MONCRIEFF AND JOHN MITCHELL MONCRIEFF, OF 'SOUTH SHIELDS, ENGLAND.

TEA-POT, COFFEE-POT, 80G.

SPECIFICATION forming part of Letters Patent No. 451,862, dated May 5, 1891.

Application led May l, 1890. Serial No. 350,241. (No model.) n

T a/ZZ whom, in' muy concern.-

Be it known that we, ROBERT PETER MON- CRIEFF, jeweler, and JOHN MITCHELL -MoN- CRIEEF, civil engineer, subjects of the Queen of Great Britain, both residents of 2O Argyle Terrace, South Shields, in the county of Durham, England, have invented new and useful Improvements in Tea-Pots, Coffee-Pots, and other Similar Receptacles, of which the following is a specification.

This invention comprises certain improvements in tea-pots, coiee-pots, and other similar receptacles so constructed that their liquid contents are discharged by displacement. The liquid contents from receptacles of this character have hitherto been discharged only during the time the air-vent is closed and pressure maintained on the displacer, a relaxation of the pressure or an opening of th-e air-vent resulting in a cessation of the tlow of liquid. In practice it has been found very inconvenient to keep the airvent closed and simultaneously to maintain constant pressure on the displacer during the time the liquid is required to flow, and our invention is designed with the objectof overcoming this inconvenience.

Our invention relates to the application of the siphon principle to receptacles from which the liquid contents have hitherto been discharged by displacement. Vhen once the siphon is started the contents will continue to flow automatically until the desired quantity has been discharged, when the ilow may be conveniently stopped by the production of a partial vacuum in the receptacle. This may be effected by closing the air-vent and Withdrawing the displacer; and in order that our invention may be more fully understood and carried into practice we will now proceed to describe the same with reference to the accompanying drawing, which shows the section of a tea-pot constructed in accordance y with our invention.

leg A curved to correspond with the curvature of the handle C; but the outer leg A may be made perfectly straight, or of a fanciful shape, as desired.

D is a displacer, which may form part of the lid ot the vessel, and is capable ot' being slid up and down within the cylindrical casing E, the two contiguous 'faces of the displacer and casing being worked up as nearly true as possible, so that they [it each other 6o practically air-tight. The knob F is provided with a central aperture G in direct communication with the inside of the tea-pot, so that the air may freely pass through the aperture G into and out of the tea-pot. f

His a strainer of ordinary construction. It forms no part of our invention and may be dispensed with, although we prefer to use something ot this kind to prevent the tealeaves from passing ott with the tea. 7o

To start the siphon the displacer D is raised with the aperture or air-vent G open. This allows the air to pass into the interior ot the tea-pot through the aperture G. The said aperture G is now closed by the finger ot' the 75 operator or by other suitable means and the displacer D is gently pressed inward, thus compressing the air within the tea-pot and forcing the liquid to completely lill the siphontube. The siphon having thus been started, 8o the displacer D is then released and the airvent unelosed, and the liquid will continue to iiow automatically until the siphoning action is interfered with by the adlnission of air to the Siphon-tube or by the production of a partial vacuum or other means. To stop the Siphoning when sufficient has been drawn off, the vent G is closed and the displacer quickly raised, creating a partial vacuum in the teapot, which causes the withdrawal of the liquid 9c from the tube and then stops the siphoning action. Then more tea, coffee, or other liquid is required to be drawn off, the action of the siphon is again started, as before.

1. A tea-pot, coffee-pot, or other similar receptacle, consisting of a vessel having an opening for the reception of a displacer adapted to cause a continuous dow of liquid from said receptacle upon inserting said displacer into roo Suid opening and stop the flow of liquid upon creating apartial vacuum in Said receptacle, and a Siphon-spout communicating with the interior of said receptacle, substantially as 5 and for the purposes hereinbefore set forth.

2. A tea-pot., coffee-pot, or other Similar receptacle, consisting of a Vessel having an opening at the top, a displaoer to fit said opening and provided with an aperture G, and a Siphonro spout oornmunieating` with the interior of Said vessel, these parts being arranged and oon- Struoted for joint operation substantially as hereinbefore Specified.

ROBERT PETER MONCRIEFF. JOHN MITCHELL MONCRIEEF. fVtnesses:

CHARLES WILSON, PERCY HEADS, 3 Dean Street, lVefwcastleon-TL/ne, Sol'ciors Clerks.