US850412A - Automatic fluid-pressure and motor controller. - Google Patents

Description

- 110450.412. E 'PATENTED APR.1'6,1907

' w. J. BELL.

'AUTQMATIG FLUID PRESSURE AND MOTOR CONTROLLER.

APPLIGATIOH FILED mm: a. 1905.

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WALTER J. BELL, OF LOS AN GELES, CALIFORNIA, ASSIGNOR OF ONE-HALF TO LEON F. MOSS, OF LOSANGELES, CALIFORNIA.

AUTOMATIC FLUID-"PRESSURE AND MOTOR CONTROLLER- N 0. 850,412. Specification of Letters Patent.

Application filed June 3, 1905. Serial No- 263,638.

Patented April 16, 1907.

To a, whom, it may concern:

Be it known that I, WALTER citizen of the United States,

geles, in the base by a pipe 3, connected with a motor-op- J. BELL, a 4 erated pump or compressor. Where liquid residing at Los is employed to move the piston, a returncounty of Los Angeles and I pipe 4 is provided, which pipe communicates State of California, have invented certain I at its upper end with the interior of the cylinnew and useful Improvements in Automatic I der and is uncovered when the piston reaches Fluid-Pressure and Motor Controllers; and I a predetermined height.- The piston is eledo hereby declare the following to be a full, I vated against its own weight and a weight 5 and exact description of the invention, I on a lever 6, pivoted in a bracket 7 on the cylinder. Interposed between the piston and lever is a ball 8, seated in a recess in the top of the piston-stem. The weight is shiftable along the lever to regulate the resistance offered to the pressure and is held in its adjusted position by a set-screw or the like. In Fig. 4 is shown another form of lever 9, employed in connection with a resistance-spring l0, coiled around a rod 11, the latter being pivoted at its upper end to the lever and passing at its lower end loosely through an apertured lug 12, projecting from the lower end of the cylinder. .The spring is interposed between the lug and a tension-regulating nut 13. Supported from the cylinder, at the front thereof, is a plate 14, of insulating material, on which is secured a guide 15, slidably confining a bar 16. The bar is provided with two bifurcated lugs, the upper one, 17, having pivotal connection with one end of a rod 18, of insulating material, the other end of the rod being pivoted to the lever 6 or 9. To the other lug 19 on the bar 16 is pivoted a swinging contact 20, having oppositely-ex tending end projections 21 22 and an intermediate projection 23, serving, with the bar, to limit movement of the contact in one direction. Pivoted on an arm 24, extending from the plate 14, is a shoe 25 of T form, the top of the head being curved or beveled, as shown. The rise and fall movements of the shoe are limited by the engagements with a pin 26 on the arm 24 of the shoe and a finger I 27, carried by-the shoe. Pivoted at 28 on the plate 14 is a contact to which it appertains to make and use the same.

In the actuation more particularly of railway appliances-for example, switches, sig nals, gates, and the like-by fluid-pressure a diminution of pressure follows each application of power to move the switching or other element, requiring the frequent and in some instances the constant operation of the pressure-creating means. It is desirable from the standpoints of economy anddurability that l the operation of the pressure-creating means, in lieu of being constant, be coincident with the reductions in pressure, and I have devised an appliance electromechanical in character which operates automatically by varia- I tions in pressure to control the circuit of an electric motor forming apart of the pressurecreating means, whereby the pressure of the fluid, either air or liquid, is maintained practically constant and proper actuation of the switching or other element is at all times assured.

The nature of the invention will be readily comprehended, reference being had to the following detailed description and to the accompanying drawings, illustrating the invention in its preferred form of embodiment,it being understood that various modifications may be made therein without exceeding the scope of the concluding claims.

In the drawings, Figure 1 is a top plan view of an automatic fluid-pressure and motor controlling appliance embodying the invention. Fig. 2 1s a front elevation of the same. 29 in the form of a bell-crank lever, one rela- Fig. 3 is a side elevation of the same. Fig. 4 tively short arm 30 of which is engaged by is a detail view showing a modification. Fig. a flat spring 31 to normally press the longer 5 is a sectional view on line 5 5 of Fig. 3. Figs. 6, 7, and 8 are detail views showing cerarm 32 is in the path of the projection 22 of tain parts in diiferent positions. the swinging contact,'and said end is pro- Referring to the drawings by numerals, 1 vided on its inner side with a depending designates a vertical cylinder in which is slidplate 34, whereby the projection may hook ably arranged a piston 2, elevated by fluid under the arm and contact with the plate 34. under pressure entering the cylinder at its Wires 35 36 lead, respectively, from the arm 32 against a stop 33. The end of the

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