US1188752A - Mine-gate lock. - Google Patents

Description

Q. GAVAZZI.

MINE GATE LOCK.

APPLICATION man MAR. 31, 1915.

Patented June 27, 1916.

333 30 June 14101 UNTTE i;

QUINTO GAVAZZI, OF 0L1) FORGE, PENNSYLVANIA.

MINE-GATE LOCK.

Application filed March 31, 1915.

To all whom it may concern Be it known that I, QUINTO GAvAzzI, a citizen of the United States of America, and resident of Old Forge, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Mine-Gate Locks, of which the following is a specification.

This invention relates to mine cars and particularly to safety devices for the doors thereof, the said invention having for its object the provision of novel means for looking the door and retaining it locked until such time as the car is in position at the landing for receiving or discharging a load,

novel means being provided whereby the car or device carried thereby actuates a lock or latch releasing device so that the latch is free to be moved out of engagement with its interlocking member only when the car is opposite the said landing or door.

A still further object of this invention is to provide novel means forreturning the latch guard to its normal operative position when the car has been moved out of engagement with the guard operating means.

With the foregoing and other objects in view, the invention consists in the details of construction, and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings forming part of this specification wherein like characters denote corresponding parts in the several views, and in which- Figure 1 illustrates a fragment of an elevator shaft showing the door in section and the locking mechanism associated therewith; Fig. 2 illustrates a horizontal sectional view thereof showing a fragment of the car; Fig. 3 illustrates a perspective view of the latch; Fig. 4 illustrates a side elevation thereof with the latch operating lever in section; Fig. 5 illustrates a plan view of the latch and latch engaging member; and Fig. 6 illustrates a plan view of the latch engaging member.

In these drawings 7 denotes a guide rail usually employed in elevators, 8 a channel iron constituting a part of an elevator car which operates in conjunction with the guide rail, although the means for guiding the car and the means coacting with the said guiding means may be of any appropriate Specification of Letters Patent.

Patented June 27, 1916.

Serial No. 18,339.

construction and I do not wish to be limited wlth respect to the construction of the elevator, as it will be apparent from an inspection of the invention that the guard for the door latch may be actuated from any part of the car, so long as the car is provided with a trlpping device, a type of which is shown herein and is identified by the reference numeral 9. In the present embodiment of this feature of the invention, a wheel is employed which is carried by the car and the said wheel is adapted to operate toggle levers 10 for forcing them inwardly; the said toggle levers being operated in an opposite direction by a spring 11 connected to a pivot 12 of the toggles, the opposite end of the spring being anchored to an arm 13 extending from the plate 1 1, the said plate having a stud 15 on which the lower ends of the toggle lovers are pivoted. The plate is secured to the well casing 16 in any appropriate way.

As a means for limiting the movement of the toggles under the influence of the spring, the said spring is housed in a tube 17 with a flared end 18 against which the toggles abut and the said tube is interposed between the toggles and the arm as shown in Fig. 1. A bar 19 is pivotally connected to the ends of the toggles remote from the pivot on the plate and the said bar is pivotally connected to a bell crank 20, which bell crank is mounted on a pivot 21. The bell crank 20 operates a thrust bar and the thrust bar in turn is pivotally connected to a guard 23, which guard is slidable on a plate 24: secured to the inner wall of the well casing. The plate 2 1 has a downwardly extending spring tongue 25 with an aperture 26 and the said plate 24: has a guide 27 through which the guard is slidable.

The door 28 of the well casing has a housing 29 secured to it and the said housing carries a pivot 30 on which the latch 31 is mounted, there being spacing collars 32 on the pivot 80 between the latch and the sides of the housing. Furthermore, the said housing has a pin 33 extending therethrough which constitutes a support for the latch. From the fact that the door carries a hous ing and latch, the said latch rides over the curved surface of the tongue 25 when the door is closed and the nose 34 of the latch will drop into the aperture 26 of the tongue, thus effecting an interlocking engagement which will prevent opening of the door until the latch is elevated clear of the tongue. To prevent accidental movement of the latch after it has engaged the tongue of the plate, the guard 23 is caused to overlie the latch and engage a lug 35 which is formed thereon to maintain the interlocked relation of the latch and tongue. In order to disengage the latch and tongue after the guard is removed from the latch, a lever 36 is pivoted to the door and one end thereof projects through an aperture 37 in the housing and under the latch so that when the upper end of the lever is operated, the latch will be elevated from engagement with the tongue and the door may swing open.

From what has been said of the guard operating mechanism, it is apparent that the latches of all the doors of a mine shaft are guarded at all times except when the car is stopped at a landing where it is unguarded, and furthermore, that the car must be in a certain position with relation to the landing before the latch is unguarded. The relation of parts can, therefore, be maintained so that the operator of a mine car cannot open the door when the car is above or below the landing, or when the car is in motion. The tongue is resilient and the nose of the latch has a curved surface 38 constituting a cam which rides over the tongue, thus elevating the latch so that it will fall into the aperture or slot of the tongue.

and adapted to interlock with the tongue of the plate, a guard adapted to slide into engagement with the latch and retain the same in engagement with the tongue, a toggle, means for connecting the toggle to operate the guard, and means carried by a mine car for operating the toggle.

2. In a mine door look, a plate having a depending apertured tongue stationary with relation to the door of a mine cage, a housing carried by the door, a latch member pivotally supported by the housing, a guard member carried by the plate, a guard operating in the guard member, toggle levers associated with the guard, means for normally holding the guard into engagement with the latch member, and means carried by a mine cage for engaging the toggle and moving the guard out of engagement with the latch.

In testimony whereof, I aflix my signature in the presence of two witnesses.

QUIN'ro GAVAZZI.

lVitnesses SAMUEL BRoDHnAn, FRANK RosATI.

copies of this patent may he obtained 10: five cents each, by addressi g the "Commissioner o1! getentg. Washington. D. 0.,"

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