spacer

(redirected from Extension tube)
Also found in: Dictionary, Medical, Wikipedia.

spacer

[′spās·ər]
(engineering)
A piece of metal wire twisted at one end to form a guard to keep the explosive in a shothole in place and twisted at the other end to form a guard to hold the tamping in its place.
A piece of wood doweling interposed between charges to extend the column of explosive.
A device for holding two members at a given distance from each other. Also known as spacer block.
The tapered section of a pug joining the barrel to the die; clay is compressed in this section before it issues through the die.

spacer

1. In glazing, one of the small blocks of wood or other material placed on both sides of the edges of glass, during its installation, to center it, to maintain uniform width of sealant beads, and to prevent excessive sealant distortion under lateral loading.
2. A device which holds steel reinforcement in its proper position, or which holds wall forms at a given distance apart before and during concreting.
References in periodicals archive ?
So to allow for the varied back-focus demands of eyepieces and cameras, the FCD100 comes with three extension tubes, one short and two longer ones, plus a final screw-on collar that accepts 2-inch accessories.
A soft, silent rubber extension tube allows for instantaneous changes in call vocalization.
The extension tube connecting the drainage system to the collection bottle must have a diameter that is larger than or equal to the rest of the routes, besides being transparent and having appropriate length so as to prevent fluid from siphoning back.
A 25mm extension tube has a magnification factor of .
A 20ml syringe is attached to 3-way stop cock with 2 plastic extension tubes, one connected to a mercury manometer and the other to a sterile 18 guage needle.
A viewer complained that the ad misleadingly implied that the extension tube and hose could be folded away into the product when they believed this was not the case.
The T60 is a very compact and powerful push-rod style actuator with a 75 mm x 60 mm profile housing and a 38 mm diameter hard chromed steel extension tube for selectable travel up to 1,500 mm, direct force to 1000 N, speeds to 300 mm/sec and acceleration to 8 m/sec2.
Nilfisk-CFM's solution was an integrated 2 metre extension tube with specialist pipe brushes attached, enabling staff to stay at ground level during the cleaning process.
For the duck blind, the supplied four-inch extension tube screws into the barrel.
On top of the plinth extension tube a smaller hexagonal plate (6mm thick, 18cm across flats) was welded in place.
A report to the institutional clinical risk management unit was made and by reconstructing the events, it was evident that the intraoperative infusion of atracurium had been connected to a three-way stop-cock positioned at the proximal end of an 80 cm long extension tube (4.