US293851A

US293851A - de castro

Info

Publication number: US293851A
Authority: US
Publication date: 1884-02-19
Anticipated expiration: 1901-02-19

Description

(No Model.) I 3' Sheets-Sheet 1. 'J.-.jW. DE GASTRU. ELECTRIC SAFETY DEVICE FOR ELEVATORS. No. 293.851. Pate nt'ed Feb. 19,1884.

N. PETERS. MW, VIM 1C.

J; w. DE CASTRO. ELBGTRIG SAFETY DBVIGB Ton ELEVATORS.

(No Modgl'.)

Patentd Feb. 19

N, PEYERS. mmmbm Wnhin lan. D. 8.

(No Model.) I 3jShees-Sheet 3.

' J. W. DE CASTRO.

ELEGTRIG-SAFBTYDEVIOE-POR ELEYATOBS. No. 293,851; Patented Feb. 19, 1884.

\wwwdb M N PUERS. FhoIQ-Lilhugnphen wmmn mn. By a llnrrn STATES ATENT FF-ICE.

JACOB WM. nE'oAs'rRo, on NEW YORK, N. Y.

ELECTRIC SAFETYVDEVICE FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent N 0. 293,851, datedFebruary 19, 1884.

' Application filed November 21, 1883. (No model.)

To CLZZ whom, it may concern Be it known that I, JAooB '"W. DE CASTRO, a citizen of the United States, and a resident of the city, county, and State of New York, have invented certain Improvements in Electric Safety Devices for Elevators, of which the following in a specification.

My invention is a safety device for elevators, whereby I am enabled to utilize directly the power of an electric current to arrestthe movement of the cage should the support-ingropes break, obviating the uncertain and dilatory action of ordinary mechanicallyoperated detents.

In the drawings, Figurel is an elevation showing a cage and sufficient of the guides and safety appliances to illustrate my invention. Fig. 2 is a sectional plan of Fig. 1. Fig. 3 is an elevation of the cage, showing a modification. Figs. 4 and 5 are side views of the safety-magnets, illustrating modifications;

The invention is applicable to all styles of cages and different arrangements of guides, but is shown in connection with an ordinary sliding platform, A, and side guides, B B.

At suitable points upon the platform-frame are arrangedthe safety electro-magnets 0, each with the end of its soft iron core 0 adjacent to but free from contact with an iron rail or strip, a, secured tothe guide. In connection with the parts thus arranged -I use a battery or other generator, G, wires from which include all the magnets O in their circuit, and a circuitbreaker or key is connected in any suitable manner with any part of the apparatus, so that should the cable break or the cage attain undue speed the circuit will be completed, the electro magnets excited, and. the magnetic action between the cores 6 and rails a will constitute such a strong break as will arrest the further movement of the cage.

Different means of maintaining the electric connections during the movement of the cage may be employed. In the drawings Ishow copper strips 12, with which contact rollers c,

carried by arms d, projecting from the cageframe make contact. WVires s s s s 8 constitute the connections between the battery,

strips b, and magnets, and wires s 8 complete the circuit in connection with a circuit-breakconnected to the wire 8, and arm u, secured to the suspension-bolt o and connected to the wire 8, and a spring, m, serves to throw down the bolt and bring the arm against the pillar when the cable breaks. Where itis desired to apply the brake, should the cage acquire an undue speed without the rope breaking, a wing, fan, governor, or other device may be arranged to cause the completion of the circuit. For ingreat, be lifted by the action of the air, and -.will bring the switch uin connection with the pillar g. A greater retarding effect may be secured by making either the magnets or their cores or the rails a movable, so, as to insure actual contact between the cores and the rails when the magnets are excited. i

' hen safety-racks are substituted for rails, as shown in Figs. 4 and 5, the magnet-frame may slide on a bracket, 1?, secured to the cage-frame, and a spring, q, may serve to hold back the magnet until it is excited, as in Fig. 4,, or the spring may be connected to a sliding core in'a stationary magnet, as in Fig. 5.

Instead of putting the magnets in one circuit, each may be in a separate circuit, as shown in Fig. 3. Where a magneto-generator is employed, it may be run usually with but littlepower, asv the only force required so long .as the circuit is broken is that needed torevolve the armature-shaft.

\Vithout limiting myself tothe precise construction and arrangement shown, I claim 1. An electro safety device for elevators, consisting of iron strips upon or adjacent to the guides, electro-magnets, with the ends of their cores adjacent to said strips, a circuitc'loser, and connections whereby, upon any undue increase of speed, the circuit is completed and the magnets excited, substantially as set forth.

'2. The combination, with a cage support ing electro-magnets and connections, and a circuit-closer arranged to complete the circuit and excite the magnets should the cage part from its cable or attain undue speed, of iron strips arranged opposite the cores of the magnets to insure a magnetic retarding effect stance, the counterbalanced fan or wing VV' (dotted lines, Fig. 1) will, if the speedis too er, 0. This, as shown, consists of a pillar, g,

when the magnets are excited, substantially as set forth.

3. The combination of a movable cage carrying electro-magnets, safety-detents, and a circuit-closer, a stationary generator, and strips 2) in the electric circuit, and circuitconnections 011 the cage, moving in contact with said strips, substantially as set forth.

4. The combination of the cage, magnets, automatic circuit-closers, strip a, generator,

' and connections, as described, whereby to