Curious about them myself finding them in the California statutes I did some research over the years.
Many states I believe actually copy the older California prohibitions, which is why they shared the terminology.
A large number of states copied just a few states with almost identical terminology, sometimes condensing the statutes or prohibited items to one statute, or changing things slightly, but generally copying them.
California borrowed things like dirk and dagger from elsewhere ('dirk' has cultural reference from locations where people of that ethnicity were the poor undesirables often involved in crime), while I believe was first with some of the other prohibited items were initially banned in California and the terminology adopted over the years in other states.
Owen_sparks said:
These are leather pouches that hold a roll of quarters or loose change.
From my understanding the coin purse that was once carried by most people when coins were worth something instead of paper money were the basis for a lot of these weapons. Such as the 'sap' and 'sandbag' of legislation.
These coin purses were strong, made to hold heavy metal coins, and last for years without wearing through. They generally had a heavy duty length of leather cord or rope/twine to draw them closed and/or attach them to a belt.
As a result everyone had these. Quite likely some made the decision to fill their coin purse with even heavier lead, and the improvised sap was born. The lead making them a slightly more effective weapon, but everyone already had coin purses with change in them, and would continue to until the day of paper money and a dollar was not a lot of money anymore.
I have also heard of some improvised versions of these and similar sandbags consisting of a variety of potential bags common with sailors in San Francisco, which is what I believe ultimately led to a ban by name.
A major port city, with a lot of rough and rowdy sailors generally viewed as undesirables, the weapons they tended to commonly prefer as improvised items were targeted for a ban.
Sailors generally couldn't travel with firearms, and for protection tended to quickly improvise something for use when going out on the town.
There is a long history in our nation of banning the weapons affordable or improvised by the poor, while retaining the right for the well to do to employ firearms.
Firearms were once much less affordable to people living job to job. People actually had to make a decision to save for awhile to purchase one, and the people that tended to go drinking, buying time with prostitutes, visiting opium dens, and similar ways in those times to blow their money quickly didn't get enough from a single paycheck to buy firearms in general.
This means they were men that typically relied on 'dirks', 'bowie' knives, 'daggers', coin purses and bags of lead and sand, belaying pins, and various other items.
Ironically it was not that many of these items were that much more lethal than other blunt objects, but rather they were the improvised version of their day and so were the ones banned by legislation.
As a result
choosing to copy them today would simply be a failure to improvise with your own modern everyday normal item that would not appear out of place.
They were improvising, it was not because they were the best possible weapon, but because they were very effective objects that were inexpensive and made from items everyone was around on a regular basis.
Various security forces, and police would copy them, because as the story in the thread highlighted, they were not improvising, but rather asked people who had improvised what was effective and then copying them.
The belaying pin turning into the common billy club being a result.
Today a billy club is a purpose made weapon, but back then it was just a normal item on a ship.
They were turning regular items into purpose made weapons. I can think of dozens of regular everyday items that would be entirely normal to have, and would break a bone or kill with a single strike. Items which are not out of place anywhere, and many of which you can even carry on an airplane. Now if a bunch of people started carrying them as weapons they would get banned, so I won't start listing them.
Listing them just encourages restrictions because you take the mental requirements out of the equation, and allow others with less common sense to copy and ruin it.
In fact any legality aside, using such a regular item is preferred because it actually has a use, and does not require taking up yet additional weight and space. It multitasks, providing benefits besides just protection, and is actually a better use of limited space.
You don't even have to go out of your way to get one, but rather notice when certain items you use are very well built or come in a version that is, could easily take very solid blows without breaking, and have some density or heft to them.
You got a weapon right there, some of them a lot more effective than purpose made gimmicky weapons people commonly have marketed to them.
People who get fixated on weapons that are made as weapons are the ones that limit themselves.
They think inside the box, and they are who the legislation banning purpose made weapons clearly is effective with. These people don't see what can be a deadly weapon, but rather what other people have told them is a weapon, or is marketed as a weapon, or a movie or book has informed them is a weapon.
Blunt objects have long been preferred by criminals and citizens living in rough areas because they were cheap, disposable (not just for criminal use, but even as a regular citizen traveling between destinations the weapon could be dropped or discarded without loss of something of value after arrival), random objects anyone could acquire in a few minutes. They are easier to use than similarly common knives, and raise even less suspicion as common items in the environment.
In a historical context they were items required as tools for various jobs or while working, to items for carrying change when coins were the primary currency, to the bricks that made up your streets and buildings and were loosely available everywhere.
Someone with 5 minutes could readily grab a heavy object, improve it a little for better grip or striking, and have an inexpensive disposable weapon for either offensive or defensive use.
People with less imagination looked at what the next thug, sailor, immigrant, was using and instead of designing their own followed their example.
People with money had firearms. Legislation targeted the people without money, the undesirables. Many places had no restrictions on firearms until relatively modern times because they were not the tool of the undesirables until mass production made them inexpensive enough that anyone of even the lowest income levels could buy one without the need to plan or save for it. At which point they became things like 'Saturday night specials' and 'junk handguns' and were targeted by legislation intending to set a minimum price on handguns to reduce who could easily afford them, keeping them out of the hands of most of the poor.