Cable clamp bolt holding fixture facilitates forming of electrical cable runs in limited equipment space. The fixture engages the threads of the short clamp bolt through the clamp and maintains tension against clamp tendency to open while the operator installs the nut without difficulty

Sunderland, G. H.

English

NASA Technical Reports Server

July 1967	 Brief 67-10244 
NASA TECH BRIEF 
NASA Tech Briefs are issued to summarize specific innovations derived from the U.S. space program, 
to encourage their commercial application. Copies are available to the public at 15 cents each 
from the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Cable Clamp Bolt Fixture Facilitates Assembly in Close Quarters 
Rivets	 Three Bolt (Inner Diameter) Holes 
Cable Clamp 
The problem: 
In forming electrical cable runs, it often becomes 
difficult to attach and secure the necessary cable 
clamps that support and restrain the cables. This is 
primarily due to the short clamp bolts that must be 
used to prevent cluttering limited equipment space and 
to the tension imposed on the clamp closure area by 
the contained cable. Using only conventional hand 
tools the operator is exposed to hand injuries and loss 
of time, and the possibility of equipment damage 
exists.
The solution: 
A cable clamp bolt holding fixture that engages the 
threads of the bolt through the clamp and maintains 
tension against clamp tendency to open while the 
operator installs the nut without difficulty. 
How it's done: 
The cable clamp is positioned about the cable or 
cables, is pressed closed and the clamp bolt is inserted 
into the clamp holes. The open ended portion of the 
holding fixture is forced over the protruding clamp 
bolt threads and against the underside (as shown) of 
(continued overleaf) 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19670000244 2020-03-11T20:35:04+00:00Z
the clamp. Designed for 3 different diameter bolts, the 
holding fixture engages the bolt threads and holds 
firmly against the clamp opening tension while the 
nut is installed. The holding fixture is then withdrawn 
and the nut is taken up to complete clamp closure. 
Notes: 
1. In normal applications, the holding fixture would 
be used to hold the clamp bolt outboard of a 
panel or other structural member on which a cable 
run is being installed. The technique and sequence 
would be the same. 
2. Plates or other assembly members could be joined 
using this type fixture to hold them in place tem-
porarily.
3. Inquiries concerning this innovation may be di-
rected to:
Technology Utilization Officer 
Kennedy Space Center 
Kennedy Space Center, Florida 32899 
Reference: B67-10244 
Patent status: 
No patent action is contemplated by NASA. 
Source: Gary H. Sunderland 
of The Boeing Company 
under contract to 
Kennedy Space Center 
(KSC-67-80) 
Brief 67-10244	 Category 05


Cable clamp bolt fixture facilitates assembly in close quarters

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