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Version A
Version B
Version C
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I acquired my Atlas Kwik-Stop 6275, Version A from Renee Jaloszynski in 2022.
Version A is 155 mm. long, 176 mm. wide, 51 mm. high, and weighs 1255 g.
The Kwik-stop has a U-shaped frame made out of aluminum. Inside is a sliding block with a U-shaped groove to fit the rope as well. The sliding block rides on the diagonal aluminum block seen at the middle of the device. This diagonal block goes through to the other side, and is removed top open the rope grab for inserting the rope. As the sliding block descends relative to the frame, the rope is squeezed over much of its circumference and over the entire height of the device.
Naturally, the sliding block must press against the rope with enough force to generate enough braking friction. This is ensured by the lever which pivots on an axle running through the sliding block (the center of the sliding block is hollow so there is room for the lever to move). When the lever is pulled down at the attachment point (the hook), the opposite end presses against the bottom of the diagonal block, which forces the axle and sliding block downward with respect to the diagonal block and the U-frame. A small spring helps to pull the lever upward to release the device.
Version A has a 23" (580 mm.) lanyard made from 1/2" (13 mm.) laid nylon rope eye spliced to the lever eye. The other end is eye spliced to a snap hook. A nylon bushing inside each eye splice protects the rope from abrasion.
The front is stamped with "UP and "THIS END" near the top, "KWIK-STOP," "ATLAS SAFETY EQUIP,CO,INC.,"and "MATAWAN,N.J.07747" above the block, and "THIS END" and "DOWN" near the bottom. The rear is stamped with "UP and "THIS END" near the top and "THIS END" and "DOWN" near the bottom. The rear has the following message stamped above the block:
CAUTION
DO NOT USE WITH LANYARD
OVER 2 FEET LONG
CHECK FOR WEAR ON ROPE
& GRAB BEFORE USING
ROPE-USE ONLY
5/8 NYLON
3/4 NYLON
MAX LOAD 350 LBS.
The rear has the following stamped near the bottom):
MODEL NO.6275
PAT.NO 3,811,155
CALIF.APPROVAL NO.C-3529
The end of the sliding block is stamped "05 -78." A previous owner scratched "T+B" into the front and rear sides.
The Atlas Kwik-Stop is a large, heavy rope grab. It can be used as an ascender, but who would want to? The operating principle is interesting because of the unique way that it spreads the load out on the rope. I think that this idea could be used to make a better ascender for rescue situations where rescue crews like to shock-load the rope by dropping the stretcher team (why they do this escapes me, but it seems to be a major factor in their thinking).
I think that a much lighter and smaller ascender could be built to work on the same principle. The attachment hook and cold shut would not be desirable on an ascender because of their size and weight.
The Kwik-Stop is protected by U.S. Patent 3,811,155.
[ Top | Version A | Version C | Return to Rope Grabs ]
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I acquired my Atlas Kwik-Stop 6275 from Bob Elron in 1979.
My Atlas Kwik-Stop 6275 is 157 mm. long, 176 mm. wide, 51 mm. high, and weighs 1227 g.
The Kwik-stop has a U-shaped frame made out of aluminum. Inside is a sliding block with a U-shaped groove to fit the rope as well. The sliding block rides on the diagonal aluminum block seen at the middle of the device. This diagonal block goes through to the other side, and is removed top open the rope grab for inserting the rope. As the sliding block descends relative to the frame, the rope is squeezed over much of its circumference and over the entire height of the device.
Naturally, the sliding block must press against the rope with enough force to generate enough braking friction. This is ensured by the lever which pivots on an axle running through the sliding block (the center of the sliding block is hollow so there is room for the lever to move). When the lever is pulled down at the attachment point (the hook), the opposite end presses against the bottom of the diagonal block, which forces the axle and sliding block downward with respect to the diagonal block and the U-frame. A small spring helps to pull the lever upward to release the device.
The front is stamped with "UP and "THIS END" near the top, "KWIK-STOP," "ATLAS SAFETY EQUIP,CO,INC.,"and "MATAWAN,N.J.07747" above the block, and "THIS END" and "DOWN" near the bottom. The rear is stamped with "UP and "THIS END" near the top and "THIS END" and "DOWN" near the bottom. The rear has the following message stamped above the block:
CAUTION
DO NOT USE WITH LANYARD
OVER 2 FEET LONG
CHECK FOR WEAR ON ROPE
& GRAB BEFORE USING
ROPE-USE ONLY
5/8 NYLON
3/4 NYLON
MAX LOAD 350 LBS.
The rear has the following stamped near the bottom (the characters in gray are nearly invisible):
MODEL NO.6275
PAT.NO 3,811,155
N.Y.BSA APPROVAL NO.6195
CALIF.APPROVAL NO.C-3529
The end of the sliding block is stamped "03 -79." One side of the hook is stamped "BOURDON" and "1210," the other "FORGED & TESTED."
Version B has a chain connecting link rather than a rope lanyard connecting the snap hook to the rope grab lever eye. It is also marked with an N.Y.BSA approval.
The jack chain on mine was broken and the original retaining pin was replaced with a common hairpin. I've since replaced the chain and will be making a replacement retaining pin patterned after the original on my other versions.
[ Top | Version A | Version B | Return to Rope Grabs ]
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| Front | Rear |
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| Top | Open for Rigging |
I acquired my Atlas Kwik-Stop 6275, Version C from Darlene Pryne Re-Tooled in 2022.
Version C is 154 mm. long, 176 mm. wide, 51 mm. high, and weighs 928 g.
The Kwik-stop has a U-shaped frame made out of aluminum. Inside is a sliding block with a U-shaped groove to fit the rope as well. The sliding block rides on the diagonal aluminum block seen at the middle of the device. This diagonal block goes through to the other side, and is removed top open the rope grab for inserting the rope. As the sliding block descends relative to the frame, the rope is squeezed over much of its circumference and over the entire height of the device.
Naturally, the sliding block must press against the rope with enough force to generate enough braking friction. This is ensured by the lever which pivots on an axle running through the sliding block (the center of the sliding block is hollow so there is room for the lever to move). When the lever is pulled down at the attachment point (the hook), the opposite end presses against the bottom of the diagonal block, which forces the axle and sliding block downward with respect to the diagonal block and the U-frame. A small spring helps to pull the lever upward to release the device.
The front is stamped with "UP and "THIS END" near the top, "KWIK-STOP," "ATLAS SAFETY EQUIP,CO,INC.,"and "MATAWAN,N.J.07747" above the block, and "THIS END" and "DOWN" near the bottom. The rear is stamped with "UP and "THIS END" near the top and "THIS END" and "DOWN" near the bottom. The rear has the following message stamped above the block:
CAUTION
DO NOT USE WITH LANYARD
OVER 2 FEET LONG
CHECK FOR WEAR ON ROPE
& GRAB BEFORE USING
ROPE-USE ONLY
5/8 NYLON
3/4 NYLON
MAX LOAD 350 LBS.
The rear has the following stamped near the bottom (the characters in gray are nearly invisible):
MODEL NO.6275
PAT.NO 3,811,155
N.Y.BSA APPROVAL NO.6195
CALIF.APPROVAL NO.C-3529
The end of the sliding block is stamped "05 -83."
This version replaced the jack chain keeper found on earlier versions with a stainless steel cable.
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