US1245946A - Safety-gate for elevators. - Google Patents

Description

M. MOUL,

SAFETY GATE FOR ELEVATORS.

APPLiCATlON FILED AUG-2|. I917 Patenfed Nov. 6, 1917.

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MARTIN MOUL, or naivovnn, PENNSYLVANIA.

sarnrrearn 'ron ELEVATORS.

Specification of Letters Patent. I

Patented Nov. 6, 1917.

Application filed August 21, 1917. Serial No. 187,339.

To all whom it may concern:

Be it known that I, MARTIN MOUL, a citizen of the United-States, residing at Hanover, county of York, and State of Pennsylvania, have invented certain new and useful Improvements in Safety-Gates for Elevators,'of which the following is a specification.

The object of my invention is the provision of an improved cage-controlled latch-.

ing mechanism for holding open an automatically. closing safety gate for freight elevators which requires opening by hand,

therebycomplying with laws or regulations which prohibitthe use .of an automatically opening gate and approve a self closing gate which must be opened by hand and latched.

In carrying out my invention I provide a simple, reliable, and positively actuated latching mechanism which is operated by the cage when the latter'is at the landing to so condition the parts that when the counterweighted gate is opened byhand, it

willbe latched and will remain in that condition'until the cage leaves the landing, whereupon the latch will release the gate and the latter will thenautomatically close.

The improved mechanism constituting my invention comprises a latch for engaging and holding open of the gate, a rock-shaft cooperatively related thereto, a spring actuated pull rod for turning the rock-shaft,

and a trip or shoe for operating the pull rod,

. lines;

Fig. 2 is a side clevationthereof with cer-' tain parts broken away and others in section; and

Rig. 3 is a detail perspective of the rockshaft and oppositely set cranks.

It'will be understood that the gate and my mechanism can 'be used at any landing and in connection with any elevator but 1t.

7 is illustrated with a freight elevator such as is commonly used in factories, warehouses, and-the hke.

Two of the floors or land ngs are shown at 1, 2, the counterweight box for the cage appears at 3, the cage at 4, and one of the guides is shown at 5. V

Dotted lines 6 represent a sliding gate hanger and is automatically closed by a counterweight 7.. The gate 6 is intended to be opened by hand and slides laterally across the side of the elevator shaft. The counterweight 7 keeps the gate normally closed.

Depending from the ceiling or the landing are hangers 8. A rock-shaft'9 is jour-- naled in the hangers and carries oppositely set cranks 10, 11. A gravity latch 12 which is pivoted to a suitable bracket 13, isadapted to drop over and engage a latch member 14 carried by the gate 6 when the gate is slid to open position as shownin Fig. 1.

The upper face of the member 14 and the to which is hung by any suitable sheave door face of the, head of the latch are inclined or curved so that the latch will ride on the member 14 and then drop into locking engagement with it, when the gate is opened. To permit this rise of the latch, it ipprovided with a slotted link 15 pivoted at 16 and receiving the pin 17 on the crank 10..

,Pivoted at 18 to the counterweight box-- 3 is a trip or shoe 19 which is suitably curved so that it will be properly engaged by the cage 4 when the latter is going either up or down. be provided on the cage where it engages the trip. A pullro'd 21 is engaged at its Antiefriction rollers 20 may upper end with the crank 11 at 22 and at its lower end with trip 19 at 23. A coil spring 24 surrounds the rod 21 between an adjustable set-collar 25 carried by the rodand a bracket 26 on the counterweight box' 3. The expansion of the spring 24 can be regulated by moving the collar 25-along the rodandfastening it in the desired position.

The expansion of the spring positions the trip 19 where it will be engaged by the mar '12. Consequently, when the cage is above-0r below thelanding, the gate .6 is free and is held'in closed position by counterweight 7. v g When the cage arrives at a landing, the trip 19 is pressed back,.thereby elevating the rod 21, rocking the shaft 9 and lowering the latch 12 to a position where'it will lock the l 110 gate open when the latter is opened by hand aslshown in Fig. 1. The gate will remain ers 20 and also normally elevates the latch the action of the.

in open, locked, position as longas the cage 5 ridthereby, a latch adapted to engage and. "1

stays at that landing. "When the cage moves from the landing, the spring 24 swings the trip and also elevates the latch; consequently, the gate is released immediately the cage leaves the landing and the gate then automatically closes.

Having thus described my intention What I claim as new, and desire to secure by Letters Patent, is v The combination With a self-closing gate for an elevator, of a cageoontrolled latchcomprising a trip arranged ing mechanism to be engaged by the cage When thelatter is the landing, a rock-shaft, cranks eari aeaeee lock the gate when the latter is opened, a link having a pin and. slot connection With one of the-cranks,- a pull rod connecting the remaining crank with the trip, a bracket, a collar on the pull rod, and a coil spring surrounding the pull rod and interposed be tween the collar and the bracket, said spring keeping the trip normally in position for engagement by the cage and the latch normally out of position for engagement With the gate.

In testimony whereof, ll hereunto athx my signature.

Man nt Mom

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