US256486A - Electric signal-transmitter - Google Patents

Description

(No Model.)

J. KING.

ELECTRIC SIGNAL TRANSMITTER. N0. 256,486.`

Patented Ar. 18

N, PETERS. Plmko-Lnlmgmphef. washington D. c.

i UNITED p STATES PATENT OFFICE; i

JOHN KING, or ANsoNIA, CONNECTICUT.

, ELECTRIC SIGNAL-TRANSMITTER.

` SPECIFICATION' forming' part 0f Letters Patent NO. 256,486, dated AprillB, 1852.

Application nleaJune 29,1881. (No model.)

Toall whom it may concern Be it known that I, JOHN KING, of Ansonia, in the county of New Haven and State of Gonnecticut, have invented new Improvements in Electric Signal-Transmitters; and I do hereby declarethe following, when taken in counection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the saine, and which said drawings constitutevpart of this specification, and represent, in

Figure l, a front view; Fig. 2, a side view; Fig. 3, a vertical section; Fig. 4, a iront view of the plate with the finger removed; Fig. 5, a perspective view ot' the armature, detached.

This invention relates to a device for giving an electric signal or call, and particularly to that class which are automatic-such as used for telephonie, messenger, and similar calls, and it consists essentially in a plunger arranged in a dashpot, with a finger in connection with it arranged to pass over the points ot' connection without contact as the plunger is raised and to be brought into Contact with and so as to unite the points ot' connection as the plunger slowly descends, as more fully hereinafter described.

The dash-pot, as represented, consists of a hollow cylinder, A, closed at its lower end, so as to contain glycerine, or whatever liquid may be used. Within the cylinder is a plunger, consisting of a piston, B, attached to the lower end of a piston-rod, G,.and movable with the rod, the rod passing through a suitable stuifing-box, D, at the upper end, vand there provided with a weighted head, E. The piston is constructed with a large opening, c, tted with a valve opening downward, and also with a small perforation, b, so that,the cylinder being filled to the proper extent with a suitable liquid, the piston, standing near the bottom, as in Fig. 3, may be freely and quickly raised, the liquid above passing rapidly down through the large opening in the piston; but as soon as the power which raised the piston is removed the weight E forces the piston downward.

l This closes the valve of the larger openings,

and so that only the small perforation b is left for the liquid to pass upthrough above the piston, which makes the descent of the piston very much slower than its rise. In front of this dash-pot is a plate, F, to which, on one side,'is a post, G, for the battery-wire, and on the other side a like post, H, for the line-Wire, over which the signal is to be carried. From these posts branches extend toward the center, as

seen in Fig. 4, (here represented as 1 2 3.) r

From the plunger of the dash-pot an arm,

AL, extends outward and is turned down, as at P, in front of and parallel with the plate F at its lower end. The nger 7L is hinged so as to be turned out and in-that is, from or toward the plate F-and moves in a path between the points ot' connection d cf, and upon its inner. face is constructed with a single point, z', (see Fig. 5,) which, as it passes down, will successively strike the several'points of both lines and successively make connection between the point of one line and the corresponding point of the other line, hence will make and break the circuit successively at the said points and give the required signal. As connection should only be made while the linger is moving slowly-that is, downward-it is turned out from the plate in its ascent, so as to avoid connection with the points. This is best done by a rib, n, projecting on one side,over which a pin, i', in the linger will ride, so as to raise or turn the finger outward, as seen in broken lines, 'Fig.3, and after the finger has passed up above all the points to be connected, the pin r escapes from the rib n, and then the nger is forced inward by a spring, s, and passes down free from the rib u, and in a path to make the connections, as before described. The pin 'r is made movable to the right and left, or trans versely. As it approaches its extreme downward movement it strikes an inclined rib, t, on the side opposite the rib u, which forces the pin toward the said rib, so that in its ascent it will make engagement with the rib n to raise it or turn it outward. Then, as the iinger approaches its extreme upward movement,the

IOS

is inclined` at its upper end, and which forces the pin back out of the way of the rib n, so that in descending the finger will make and break the circuit, as before described.

Instead of a weight on the plunger, a spring may be applied, or the plunger itself may be made sufficiently heavy to avoid thc necessity of added weight or spring. If a spring be applied, the apparatus may be inverted, in which case the finger would make its connections in an upward movement. I therefore wish to be understood by the term descent as meaning the slow movement produced by the dash-pct.

It will be evident to those skilled in this art that various devices may be substituted for the ribs n and tand the movable pin 1 to throw the finger out ofthe way of the points of connection in its upward movement and bring it into line therewith in its descent. Hence I do not wish to be understood as limiting my invention to this particular construction.

I do not broadly claim a plunger arranged in a dash-pot to operate a device passing over points so as to make and break an electric circuit, as such, I am aware, is not new; but

What I do claim is- The combination of a dash-pot and the plunger arranged therein for slow descent, an arm extending from the plunger, the finger hinged at one end of said arm and so as to move in a path parallel with the plunger, a plate parallel with said arm,to which the wires to be connected are brought, the points ot' connection arranged in the path ofthe descending armature, and device, substantially such as described, to turn the armature out ot' the path ot' said points as the armature ascends and to bring it into a path to connect said points as the armature descends, substantially as described.

J OHN KING.

Witnesses:

DANIEL E. McMAHoN, W. O. WALLACE.

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