US837546A - Elevator safety lock or grip. - Google Patents

Description

No. 837,546. PATENTED DEC. 4, 1906.

H. A. CLIFFORD.

ELEVATOR SAFETY LOCK 0R GRIP. APPLICATION FILED emu. 12. 1905.

ZNESSES, I 7 7 1V1V7'0.

HERSEY A. CLIFFORD, OF SAN FRANCISCO, CALIFORNIA.

ELEVATOR SAFETY LOCK OR GRIP- Specification of Letters Patent.

Patented Dec. 4:, 1906.

Application filed September 12, 1905. Serial No. 278,197.

use on freight or other elevators, thereby preventing the accidental loss of life or property.

A further object of my invention is to provide a lock or grip for elevators which shall prevent a person on any other floor from the one where the cage or platform is being used from pulling the shipping-line and thereby causing untold injury or harm in many ways by starting the elevator up or down without due notice to the party using it, it being a well-known fact that the majority of accidents resulting in loss of limb or life and prop erty 011 freight elevators particularly are caused by the premature starting of the same instead of there being any breaking of the elevator mechanism.

Another object of my invention is to provide a device that shall be small enough to be placed in the various small spaces left be tween the cage or platform and the timbers of the elevator-shaft and also to place the device out of the way of loaded trucks and so it will not interfere when the shippingline is joined to a small cable that operates the switch of the motor in basements.

The most essential feature of my invention is it being so arranged that it may be conveniently attached when the shipping-line is located immediately at the corner of the cage or platform, as not more than one inch is re quired beyond the shipping-line for the perfect action of my device, while in looks already in use a very much greater space is required. This look also requires no knots, buttons, or other protuberances 011 the rope or shippingline, as most locks require, but acts perfectly on the smooth line, leaving it free and clear, which is very desirable, all obstructions of knots or other projections on the line being dangerous, and this look, furthermore, gives no frictional wear upon the shipping-line or causes any damage to it.

My invention therefore resides in the novel construction, combination, and arrangements of parts for the above ends hereinafter fully specified, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a view of the lock or grip as it is applied to an elevator. Fig. 2 is a perspective view showing the grip-in an unlocked position. is a perspective view showing the device in its locked position on the shipping-line. Fig. 4 is a horizontal section of the device. Fig. 5 is an inside View of the flap or lock-plate. Fig. 6 is a front view of the hinged end of the handle, showing the slot and the enlarged lower portion. Fig. 7 is a side view of the hinged portion of the handle, showing the cam-shape rounded edge and also the stop for the action of the handle when locked.

Referring to the drawings, 1 represents any suitable standard or frame on the cage or platform of an elevator, where may be rigidly secured the arm or bar 2, that holds the lock or grip in its proper place or relation to the shipping-line. The arm 2 is further secured by the brace 3, the brace being bolted to the arm 2 near the lock and the other end to the frame 1, as shown, or fastened to any suitable place conveniently near to hold the arm 2 rigid.

The construction shown is adapted for the support of my lock 011 most elevators, but some elevators require different means for holding the lock. Therefore I do not limit myself to the method shown.

Fig. 2 represents the lock or grip-frame 4, which as constructed comprises one side and top and bottom plates. The frame 4 is secured by bolts 6 to the arm 2. In the top and bottom plates on frames 4 there are openings or recesses 5 to guide and lock orgrip the shipping-linen These openings or recesses do not quite cross the upper and lower plates, in so much as it leaves a portion to form a rib in each plate, against which the shipping-line is pressed, as will be hereinafter explained. The shipping-line may be rope, cable, or chain, and my lock works equally well on each. Inside the lock or grip-frame 4 is hinged at 7 a flap or lock-plate 8, which has one or more ribs 9 to engage the shipping-line when it is locked. The handle 10 is so arranged that its divided end has a wide curved cam-base 11 and the central slot 12 to receive the end of the connecting-rod 14, the

Fig. 3

bolt 13 joining the handle 10 to the connecting-rod 14, on which swings the handle 10, preferably througha slot 15 (though anyform of opening may be used) in the arm 2 and the lock or grip-frame 4 and then through the lockplate 8. The connecting-bar 14 is constructed, preferably, of a flat shape where it passes through the frame and into the handle 10, and by the oblong shape of the slot 15 the action of the handle 10 is always in the same plane, as in the construction shown, though the connecting-rod may be round and may pass througha round hole, and thus allow the handle to turn around. The other end of the connecting-rod 14 is made round and a thread 16 is placed thereon, and on this thread two lock-nuts 17 are placed, the thread 16 on the connecting-rod 14 being long enough to allow for adjustment by the nuts 17 to grip different-sized shipping-lines. The spring 18 on the connecting-rod 14 is to throw the flap or lock-plate away from the shipping-lineand to hold the handle 10 up while out of action.

Fig. 3 represents the lock or grip-frame with the shipping-line 19 held in the opening 5 and the flap or look plate 8, which engages the shipping-line when the handle 10 is turned so the cam is in action, drawing the flap or lock-plate 8 against the shipping-line with sufficient power to lock the shipping-line between the ribs 9 on the lock-plate and the ribs 20, formed by the rear edge of the recess ,5. The slotted end of the handle-bar 10 being made flat, as shown at 21, comes against the bar 2 when in unlocked position. The curved slotted portion of the handle-bar is made wider to present a'greater wearing-surface, as shown at 22. The points of the handle 23 (shown in Figs. 2, 3, 6, and 7) at the end of the curve are greater distance from the bolt 13, where the action of the handle takes place, than the remaining portion of the curve. This point 23 is to furnish a stop for the movement of the handle in its locked position and also to increase the action of the cam up to the stopping-point.

I claim- 1. In a device of the character described, a frame, means for holding the frame rigidly to the iron or timbers of an elevator by a member and a brace, a lock-plate movably connected to the frame, means for gripping the frame and the lock-plate about lines of various sizes or different constructions, sub stantially as described.

2. In a device of the character described, a frame, a movable lock-plate acting with the frame, a handle, means for binding the frame and the lock-plate by the action of the handle, and means for limiting the movement of the handle by its shape, substantially as described.

3. In a device of the character described, a frame havingopenings for the movement of a shipping-line, and ribs for engaging the shipping-line, a flap or lock-plate movably attached to the frame and adapted to hold the shipping-line in the opening of the frame, and means for locking or gripping the lockplate and the shipping-line against the frame, substantially as described.

4. In a device of the character described, a frame having ribs, a movable lock-plate secured thereto, a connecting bar or rod adjustably secured to said lock-plate, and means by which the plate looks a line against the rib or ribs on the frame, substantially as described.

5. In a device of the character described, a frame, amovable lock-plate therein, a camlever or handle, an adjustable connecting-rod, and the spring between said lock-plate and frame to cause the plate to automatically release the line upon the unlocking of the handle, and to secure the handle in its unlocked position so it cannot turn of itself against the action of the spring, substantially as described.

6. In a device of the character described, a frame, a movable lock-plate secured thereto, a connecting-bar passing through and adj ustably connecting the lock-plate and the frame about a line, and means for holding the lockplate in one or more positions, substantially as described.

7 In a device of the character described, a frame, a member attached at one end and acting with the frame, between which a shippingline acts, and means for gripping a shippingline at any position within the travel of the cage or platform operated by a double cambearing handle, substantially as described.

8. In a device of the character described, a frame, a movable member acting in conjunc tion with the frame, a slotted or double cam handle, means for gripping rope, cable, chains, or other lines by the action of the handle between the frame and movable member, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing wit- IIGSSGS.

HERSEY A. CLIFFORD. Witnesses:

K. LooKwoon NEVINS. CHARLES B. HEBRON.

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